Simplify UDriver code:

- Add SHAPE type param to UDriver.draw()
- Add AbstractUGraphic.ignoreShape()
- Rename some driver classes for consistency

src/net/sourceforge/plantuml/braille/DriverCenteredCharacterBraille.java

@@ -38,14 +38,11 @@ package net.sourceforge.plantuml.braille;
 import net.sourceforge.plantuml.ugraphic.UCenteredCharacter;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverCenteredCharacterBraille implements UDriver<BrailleGrid> {
+public class DriverCenteredCharacterBraille implements UDriver<UCenteredCharacter, BrailleGrid> {
-
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, BrailleGrid grid) {
-		final UCenteredCharacter characterCircled = (UCenteredCharacter) ushape;
 
+	public void draw(UCenteredCharacter characterCircled, double x, double y, ColorMapper mapper, UParam param, BrailleGrid grid) {
 		final double xpos = x;
 		final double ypos = y;
 

src/net/sourceforge/plantuml/braille/DriverDotPathBraille.java

@@ -38,14 +38,11 @@ package net.sourceforge.plantuml.braille;
 import net.sourceforge.plantuml.posimo.DotPath;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverDotPathBraille implements UDriver<BrailleGrid> {
+public class DriverDotPathBraille implements UDriver<DotPath, BrailleGrid> {
-
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, BrailleGrid grid) {
-		final DotPath shape = (DotPath) ushape;
 
+	public void draw(DotPath shape, double x, double y, ColorMapper mapper, UParam param, BrailleGrid grid) {
 		if (param.getColor() != null) {
 			grid.drawDotPath(x, y, shape);
 		}

src/net/sourceforge/plantuml/braille/DriverLineBraille.java

@@ -41,10 +41,9 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.ULine;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverLineBraille implements UDriver<BrailleGrid> {
+public class DriverLineBraille implements UDriver<ULine, BrailleGrid> {
 
 	private final ClipContainer clipContainer;
 
@@ -52,9 +51,7 @@ public class DriverLineBraille implements UDriver<BrailleGrid> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, BrailleGrid grid) {
+	public void draw(ULine shape , double x, double y, ColorMapper mapper, UParam param, BrailleGrid grid) {
-		final ULine shape = (ULine) ushape;
-
 		double x2 = x + shape.getDX();
 		double y2 = y + shape.getDY();
 

src/net/sourceforge/plantuml/braille/DriverNoneBraille.java

@@ -1,47 +0,0 @@
-/* ========================================================================
- * PlantUML : a free UML diagram generator
- * ========================================================================
- *
- * (C) Copyright 2009-2020, Arnaud Roques
- *
- * Project Info:  http://plantuml.com
- * 
- * If you like this project or if you find it useful, you can support us at:
- * 
- * http://plantuml.com/patreon (only 1$ per month!)
- * http://plantuml.com/paypal
- * 
- * This file is part of PlantUML.
- *
- * PlantUML is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * PlantUML distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
- * USA.
- *
- *
- * Original Author:  Arnaud Roques
- *
- */
-package net.sourceforge.plantuml.braille;
-
-import net.sourceforge.plantuml.ugraphic.UDriver;
-import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
-import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
-
-public class DriverNoneBraille implements UDriver<BrailleGrid> {
-
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, BrailleGrid object) {
-	}
-
-}

src/net/sourceforge/plantuml/braille/DriverPolygonBraille.java

@@ -43,11 +43,10 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.UPolygon;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.UTranslate;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverPolygonBraille implements UDriver<BrailleGrid> {
+public class DriverPolygonBraille implements UDriver<UPolygon, BrailleGrid> {
 
 	private final ClipContainer clipContainer;
 
@@ -55,9 +54,7 @@ public class DriverPolygonBraille implements UDriver<BrailleGrid> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, BrailleGrid grid) {
+	public void draw(UPolygon shape, double x, double y, ColorMapper mapper, UParam param, BrailleGrid grid) {
-		final UPolygon shape = (UPolygon) ushape;
-
 		final List<Point2D> points = new ArrayList<>();
 		int i = 0;
 

src/net/sourceforge/plantuml/braille/DriverRectangleBraille.java

@@ -41,10 +41,9 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.URectangle;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverRectangleBraille implements UDriver<BrailleGrid> {
+public class DriverRectangleBraille implements UDriver<URectangle, BrailleGrid> {
 
 	private final ClipContainer clipContainer;
 
@@ -52,9 +51,7 @@ public class DriverRectangleBraille implements UDriver<BrailleGrid> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, BrailleGrid grid) {
+	public void draw(URectangle rect, double x, double y, ColorMapper mapper, UParam param, BrailleGrid grid) {
-		final URectangle rect = (URectangle) ushape;
-
 		// final double rx = rect.getRx();
 		// final double ry = rect.getRy();
 		double width = rect.getWidth();

src/net/sourceforge/plantuml/braille/DriverTextBraille.java

@@ -36,18 +36,15 @@ package net.sourceforge.plantuml.braille;
 
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.UText;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverTextBraille implements UDriver<BrailleGrid> {
+public class DriverTextBraille implements UDriver<UText, BrailleGrid> {
 
 	public DriverTextBraille() {
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, BrailleGrid grid) {
+	public void draw(UText text, double x, double y, ColorMapper mapper, UParam param, BrailleGrid grid) {
-		final UText text = (UText) ushape;
-
 		y -= grid.getQuanta() * 3;
 		x += grid.getQuanta();
 

src/net/sourceforge/plantuml/braille/UGraphicBraille.java

@@ -103,14 +103,14 @@ public class UGraphicBraille extends AbstractUGraphic<BrailleGrid> implements Cl
 	}
 
 	private void register() {
-		registerDriver(URectangle.class, new DriverNoneBraille());
+		ignoreShape(URectangle.class);
 		registerDriver(URectangle.class, new DriverRectangleBraille(this));
 		registerDriver(UText.class, new DriverTextBraille());
 		registerDriver(ULine.class, new DriverLineBraille(this));
 		registerDriver(UPolygon.class, new DriverPolygonBraille(this));
-		registerDriver(UEllipse.class, new DriverNoneBraille());
+		ignoreShape(UEllipse.class);
-		registerDriver(UImage.class, new DriverNoneBraille());
+		ignoreShape(UImage.class);
-		registerDriver(UPath.class, new DriverNoneBraille());
+		ignoreShape(UPath.class);
 		registerDriver(DotPath.class, new DriverDotPathBraille());
 		registerDriver(UCenteredCharacter.class, new DriverCenteredCharacterBraille());
 	}

src/net/sourceforge/plantuml/ugraphic/AbstractUGraphic.java

@@ -48,7 +48,10 @@ public abstract class AbstractUGraphic<O> extends AbstractCommonUGraphic {
 
 	private final O graphic;
 
-	private final Map<Class<? extends UShape>, UDriver<O>> drivers = new HashMap<Class<? extends UShape>, UDriver<O>>();
+	// It would be nice to do something like this but not sure how:
+	//     Map<Class<SHAPE>, UDriver<SHAPE, O>>
+	// See https://stackoverflow.com/questions/416540/java-map-with-values-limited-by-keys-type-parameter
+	private final Map<Class<? extends UShape>, UDriver<?, O>> drivers = new HashMap<>();
 
 	public AbstractUGraphic(HColor defaultBackground, ColorMapper colorMapper, StringBounder stringBounder, O graphic) {
 		super(Objects.requireNonNull(defaultBackground), colorMapper, stringBounder);
@@ -69,11 +72,22 @@ public abstract class AbstractUGraphic<O> extends AbstractCommonUGraphic {
 		return true;
 	}
 
-	final protected void registerDriver(Class<? extends UShape> cl, UDriver<O> driver) {
+	final protected <SHAPE extends UShape> void registerDriver(Class<SHAPE> cl, UDriver<SHAPE, O> driver) {
 		this.drivers.put(cl, driver);
 	}
 
-	public final void draw(UShape shape) {
+	private static final UDriver<?,?> NOOP_DRIVER = new UDriver<UShape, Object>() {
+		@Override
+		public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, Object object) {
+		}
+	};
+	
+	@SuppressWarnings("unchecked")
+	final protected <SHAPE extends UShape> void ignoreShape(Class<SHAPE> cl) {
+		registerDriver(cl, (UDriver<SHAPE, O>) NOOP_DRIVER);
+	}
+	
+	public final <SHAPE extends UShape> void draw(SHAPE shape) {
 		if (shape instanceof SpecialText) {
 			((SpecialText) shape).getTitle().drawU(this);
 			return;
@@ -85,7 +99,10 @@ public abstract class AbstractUGraphic<O> extends AbstractCommonUGraphic {
 			drawComment((UComment) shape);
 			return;
 		}
-		final UDriver<O> driver = drivers.get(shape.getClass());
+
+		@SuppressWarnings("unchecked")
+		final UDriver<SHAPE, O> driver = (UDriver<SHAPE, O>) drivers.get(shape.getClass());
+
 		if (driver == null) {
 			throw new UnsupportedOperationException(shape.getClass().toString() + " " + this.getClass());
 		}

src/net/sourceforge/plantuml/ugraphic/UDriver.java

@@ -37,7 +37,7 @@ package net.sourceforge.plantuml.ugraphic;
 
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public interface UDriver<O> {
+public interface UDriver<SHAPE extends UShape, O> {
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, O object);
+	public void draw(SHAPE shape, double x, double y, ColorMapper mapper, UParam param, O object);
 
 }

src/net/sourceforge/plantuml/ugraphic/UGraphic.java

@@ -49,7 +49,7 @@ public interface UGraphic {
 
 	public UParam getParam();
 
-	public void draw(UShape shape);
+	public <SHAPE extends UShape> void draw(SHAPE shape);
 
 	public UGraphic apply(UChange change);
 

src/net/sourceforge/plantuml/ugraphic/eps/DriverCenteredCharacterEps.java

@@ -44,13 +44,11 @@ import net.sourceforge.plantuml.ugraphic.UCenteredCharacter;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UFont;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverCenteredCharacterEps implements UDriver<EpsGraphics> {
+public class DriverCenteredCharacterEps implements UDriver<UCenteredCharacter, EpsGraphics> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
+	public void draw(UCenteredCharacter centeredCharacter, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
-		final UCenteredCharacter centeredCharacter = (UCenteredCharacter) ushape;
 		final char c = centeredCharacter.getChar();
 		final UFont font = centeredCharacter.getFont();
 		final UnusedSpace unusedSpace = UnusedSpace.getUnusedSpace(font, c);
@@ -61,7 +59,6 @@ public class DriverCenteredCharacterEps implements UDriver<EpsGraphics> {
 		final TextLayout t = createTextLayout(font, "" + c);
 		eps.setStrokeColor(mapper.toColor(param.getColor()));
 		DriverTextEps.drawPathIterator(eps, xpos, ypos, t.getOutline(null));
-
 	}
 
 }

src/net/sourceforge/plantuml/ugraphic/eps/DriverDotPathEps.java

@@ -39,13 +39,11 @@ import net.sourceforge.plantuml.eps.EpsGraphics;
 import net.sourceforge.plantuml.posimo.DotPath;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverDotPathEps implements UDriver<EpsGraphics> {
+public class DriverDotPathEps implements UDriver<DotPath, EpsGraphics> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
+	public void draw(DotPath shape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
-		final DotPath shape = (DotPath) ushape;
 		//DriverLineG2d.manageStroke(param, g2d);
 
 		if (param.getColor() != null) {

src/net/sourceforge/plantuml/ugraphic/eps/DriverEllipseEps.java

@@ -40,10 +40,9 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UEllipse;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverEllipseEps implements UDriver<EpsGraphics> {
+public class DriverEllipseEps implements UDriver<UEllipse, EpsGraphics> {
 
 	private final ClipContainer clipContainer;
 
@@ -51,8 +50,7 @@ public class DriverEllipseEps implements UDriver<EpsGraphics> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
+	public void draw(UEllipse shape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
-		final UEllipse shape = (UEllipse) ushape;
 		final double width = shape.getWidth();
 		final double height = shape.getHeight();
 

src/net/sourceforge/plantuml/ugraphic/eps/DriverImageEps.java

@@ -40,10 +40,9 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UImage;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverImageEps implements UDriver<EpsGraphics> {
+public class DriverImageEps implements UDriver<UImage, EpsGraphics> {
 
 	private final ClipContainer clipContainer;
 
@@ -51,10 +50,7 @@ public class DriverImageEps implements UDriver<EpsGraphics> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
+	public void draw(UImage shape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
-
-		final UImage shape = (UImage) ushape;
-
 		final UClip clip = clipContainer.getClip();
 		if (clip != null) {
 			if (clip.isInside(x, y) == false) {

src/net/sourceforge/plantuml/ugraphic/eps/DriverLineEps.java

@@ -42,10 +42,9 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.ULine;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverLineEps implements UDriver<EpsGraphics> {
+public class DriverLineEps implements UDriver<ULine, EpsGraphics> {
 
 	private final ClipContainer clipContainer;
 
@@ -53,9 +52,7 @@ public class DriverLineEps implements UDriver<EpsGraphics> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
+	public void draw(ULine shape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
-		final ULine shape = (ULine) ushape;
-
 		double x2 = x + shape.getDX();
 		double y2 = y + shape.getDY();
 

src/net/sourceforge/plantuml/ugraphic/eps/DriverPathEps.java

@@ -38,14 +38,11 @@ import net.sourceforge.plantuml.eps.EpsGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.UPath;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverPathEps implements UDriver<EpsGraphics> {
+public class DriverPathEps implements UDriver<UPath, EpsGraphics> {
-
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
-		final UPath shape = (UPath) ushape;
 
+	public void draw(UPath shape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
 		eps.setStrokeColor(mapper.toColor(param.getColor()));
 		eps.setFillColor(mapper.toColor(param.getBackcolor()));
 		eps.setStrokeWidth(param.getStroke().getThickness(), param.getStroke().getDashVisible(), param

src/net/sourceforge/plantuml/ugraphic/eps/DriverPolygonEps.java

@@ -42,12 +42,11 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.UPolygon;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 
-public class DriverPolygonEps implements UDriver<EpsGraphics> {
+public class DriverPolygonEps implements UDriver<UPolygon, EpsGraphics> {
 
 	private final ClipContainer clipContainer;
 
@@ -55,9 +54,7 @@ public class DriverPolygonEps implements UDriver<EpsGraphics> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
+	public void draw(UPolygon shape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
-		final UPolygon shape = (UPolygon) ushape;
-
 		final double points[] = new double[shape.getPoints().size() * 2];
 		int i = 0;
 

src/net/sourceforge/plantuml/ugraphic/eps/DriverRectangleEps.java

@@ -42,12 +42,11 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.URectangle;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 
-public class DriverRectangleEps implements UDriver<EpsGraphics> {
+public class DriverRectangleEps implements UDriver<URectangle, EpsGraphics> {
 
 	private final ClipContainer clipContainer;
 
@@ -55,9 +54,7 @@ public class DriverRectangleEps implements UDriver<EpsGraphics> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
+	public void draw(URectangle rect, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
-		final URectangle rect = (URectangle) ushape;
-
 		double width = rect.getWidth();
 		double height = rect.getHeight();
 
@@ -93,6 +90,5 @@ public class DriverRectangleEps implements UDriver<EpsGraphics> {
 					.getStroke().getDashSpace());
 			eps.epsRectangle(x, y, width, height, rx / 2, ry / 2);
 		}
-
 	}
 }

src/net/sourceforge/plantuml/ugraphic/eps/DriverTextEps.java

@@ -53,13 +53,12 @@ import net.sourceforge.plantuml.ugraphic.MinMax;
 import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.UText;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorUtils;
 
-public class DriverTextEps implements UDriver<EpsGraphics> {
+public class DriverTextEps implements UDriver<UText, EpsGraphics> {
 
 	private final ClipContainer clipContainer;
 	private final EpsStrategy strategy;
@@ -69,15 +68,12 @@ public class DriverTextEps implements UDriver<EpsGraphics> {
 		this.strategy = strategy;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
+	public void draw(UText shape, double x, double y, ColorMapper mapper, UParam param, EpsGraphics eps) {
-
 		final UClip clip = clipContainer.getClip();
 		if (clip != null && clip.isInside(x, y) == false) {
 			return;
 		}
 
-		final UText shape = (UText) ushape;
-
 		final FontConfiguration fontConfiguration = shape.getFontConfiguration();
 		if (HColorUtils.isTransparent(fontConfiguration.getColor())) {
 			return;

src/net/sourceforge/plantuml/ugraphic/g2d/DriverCenteredCharacterG2d.java

@@ -42,13 +42,11 @@ import net.sourceforge.plantuml.ugraphic.UCenteredCharacter;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UFont;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverCenteredCharacterG2d implements UDriver<Graphics2D> {
+public class DriverCenteredCharacterG2d implements UDriver<UCenteredCharacter, Graphics2D> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
+	public void draw(UCenteredCharacter characterCircled, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
-		final UCenteredCharacter characterCircled = (UCenteredCharacter) ushape;
 		final char c = characterCircled.getChar();
 		final UFont font = characterCircled.getFont();
 		final UnusedSpace unusedSpace = UnusedSpace.getUnusedSpace(font, c);

src/net/sourceforge/plantuml/ugraphic/g2d/DriverDotPathG2d.java

@@ -41,10 +41,9 @@ import net.sourceforge.plantuml.EnsureVisible;
 import net.sourceforge.plantuml.posimo.DotPath;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverDotPathG2d implements UDriver<Graphics2D> {
+public class DriverDotPathG2d implements UDriver<DotPath, Graphics2D> {
 
 	private final EnsureVisible visible;
 
@@ -52,8 +51,7 @@ public class DriverDotPathG2d implements UDriver<Graphics2D> {
 		this.visible = visible;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
+	public void draw(DotPath shape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
-		final DotPath shape = (DotPath) ushape;
 		DriverLineG2d.manageStroke(param, g2d);
 
 		if (param.getColor() != null) {

src/net/sourceforge/plantuml/ugraphic/g2d/DriverEllipseG2d.java

@@ -46,12 +46,11 @@ import net.sourceforge.plantuml.EnsureVisible;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UEllipse;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 
-public class DriverEllipseG2d extends DriverShadowedG2d implements UDriver<Graphics2D> {
+public class DriverEllipseG2d extends DriverShadowedG2d implements UDriver<UEllipse, Graphics2D> {
 
 	private final double dpiFactor;
 	private final EnsureVisible visible;
@@ -61,8 +60,7 @@ public class DriverEllipseG2d extends DriverShadowedG2d implements UDriver<Graph
 		this.visible = visible;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
+	public void draw(UEllipse ellipse, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
-		final UEllipse ellipse = (UEllipse) ushape;
 		g2d.setStroke(new BasicStroke((float) param.getStroke().getThickness()));
 		visible.ensureVisible(x, y);
 		visible.ensureVisible(x + ellipse.getWidth(), y + ellipse.getHeight());

src/net/sourceforge/plantuml/ugraphic/g2d/DriverImageG2d.java

@@ -41,12 +41,10 @@ import java.awt.geom.AffineTransform;
 import net.sourceforge.plantuml.EnsureVisible;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UImage;
-import net.sourceforge.plantuml.ugraphic.UImageSvg;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverImageG2d implements UDriver<Graphics2D> {
+public class DriverImageG2d implements UDriver<UImage, Graphics2D> {
 
 	private final EnsureVisible visible;
 
@@ -57,11 +55,7 @@ public class DriverImageG2d implements UDriver<Graphics2D> {
 		this.dpiFactor = dpiFactor;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
+	public void draw(UImage shape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
-		if (ushape instanceof UImageSvg) {
-			return;
-		}
-		final UImage shape = ((UImage) ushape);
 		visible.ensureVisible(x, y);
 		visible.ensureVisible(x + shape.getWidth(), y + shape.getHeight());
 		if (dpiFactor == 1) {

src/net/sourceforge/plantuml/ugraphic/g2d/DriverLineG2d.java

@@ -43,12 +43,11 @@ import java.awt.geom.Line2D;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.ULine;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.UStroke;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 
-public class DriverLineG2d extends DriverShadowedG2d implements UDriver<Graphics2D> {
+public class DriverLineG2d extends DriverShadowedG2d implements UDriver<ULine, Graphics2D> {
 
 	private final double dpiFactor;
 
@@ -56,9 +55,7 @@ public class DriverLineG2d extends DriverShadowedG2d implements UDriver<Graphics
 		this.dpiFactor = dpiFactor;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
+	public void draw(ULine shape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
-		final ULine shape = (ULine) ushape;
-
 		final Shape line = new Line2D.Double(x, y, x + shape.getDX(), y + shape.getDY());
 		manageStroke(param, g2d);
 		// Shadow

src/net/sourceforge/plantuml/ugraphic/g2d/DriverPathG2d.java

@@ -44,14 +44,13 @@ import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.UPath;
 import net.sourceforge.plantuml.ugraphic.USegment;
 import net.sourceforge.plantuml.ugraphic.USegmentType;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.arc.ExtendedGeneralPath;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 import net.sourceforge.plantuml.ugraphic.color.HColorUtils;
 
-public class DriverPathG2d extends DriverShadowedG2d implements UDriver<Graphics2D> {
+public class DriverPathG2d extends DriverShadowedG2d implements UDriver<UPath, Graphics2D> {
 
 	private final double dpiFactor;
 
@@ -59,8 +58,7 @@ public class DriverPathG2d extends DriverShadowedG2d implements UDriver<Graphics
 		this.dpiFactor = dpiFactor;
 	}
 
-	public void draw(UShape ushape, final double x, final double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
+	public void draw(UPath shape, final double x, final double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
-		final UPath shape = (UPath) ushape;
 		DriverLineG2d.manageStroke(param, g2d);
 
 		final HColor back = param.getBackcolor();

src/net/sourceforge/plantuml/ugraphic/g2d/DriverPixelG2d.java

@@ -39,12 +39,12 @@ import java.awt.Graphics2D;
 
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
+import net.sourceforge.plantuml.ugraphic.UPixel;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverPixelG2d implements UDriver<Graphics2D> {
+public class DriverPixelG2d implements UDriver<UPixel, Graphics2D> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
+	public void draw(UPixel pixel, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
 		g2d.setColor(mapper.toColor(param.getColor()));
 		g2d.fillRect((int) x, (int) y, 1, 1);
 	}

src/net/sourceforge/plantuml/ugraphic/g2d/DriverPolygonG2d.java

@@ -45,13 +45,12 @@ import net.sourceforge.plantuml.EnsureVisible;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.UPolygon;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 import net.sourceforge.plantuml.ugraphic.color.HColorUtils;
 
-public class DriverPolygonG2d extends DriverShadowedG2d implements UDriver<Graphics2D> {
+public class DriverPolygonG2d extends DriverShadowedG2d implements UDriver<UPolygon, Graphics2D> {
 
 	private final double dpiFactor;
 	private final EnsureVisible visible;
@@ -61,9 +60,7 @@ public class DriverPolygonG2d extends DriverShadowedG2d implements UDriver<Graph
 		this.visible = visible;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
+	public void draw(UPolygon shape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
-		final UPolygon shape = (UPolygon) ushape;
-
 		g2d.setStroke(new BasicStroke((float) param.getStroke().getThickness()));
 
 		final GeneralPath path = new GeneralPath();

src/net/sourceforge/plantuml/ugraphic/g2d/DriverRectangleG2d.java

@@ -50,7 +50,6 @@ import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.UPattern;
 import net.sourceforge.plantuml.ugraphic.URectangle;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.UShapeSized;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
@@ -58,7 +57,7 @@ import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 import net.sourceforge.plantuml.ugraphic.color.HColorSimple;
 import net.sourceforge.plantuml.ugraphic.color.HColorUtils;
 
-public class DriverRectangleG2d extends DriverShadowedG2d implements UDriver<Graphics2D> {
+public class DriverRectangleG2d extends DriverShadowedG2d implements UDriver<URectangle, Graphics2D> {
 
 	private final double dpiFactor;
 	private final EnsureVisible visible;
@@ -68,9 +67,8 @@ public class DriverRectangleG2d extends DriverShadowedG2d implements UDriver<Gra
 		this.visible = visible;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
+	public void draw(URectangle rect, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
 		g2d.setStroke(new BasicStroke((float) param.getStroke().getThickness()));
-		final URectangle rect = (URectangle) ushape;
 		final double rx = rect.getRx();
 		final double ry = rect.getRy();
 		final Shape shape;

src/net/sourceforge/plantuml/ugraphic/g2d/DriverTextAsPathG2d.java

@@ -55,12 +55,11 @@ import net.sourceforge.plantuml.graphic.StringBounder;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UFont;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.UText;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 
-public class DriverTextAsPathG2d implements UDriver<Graphics2D> {
+public class DriverTextAsPathG2d implements UDriver<UText, Graphics2D> {
 
 	private final EnsureVisible visible;
 	private final StringBounder stringBounder;
@@ -79,8 +78,7 @@ public class DriverTextAsPathG2d implements UDriver<Graphics2D> {
 		}
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
+	public void draw(UText shape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
-		final UText shape = (UText) ushape;
 		final FontConfiguration fontConfiguration = shape.getFontConfiguration();
 
 		final UFont font = fontConfiguration.getFont();

src/net/sourceforge/plantuml/ugraphic/g2d/DriverTextG2d.java

@@ -56,14 +56,13 @@ import net.sourceforge.plantuml.text.StyledString;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UFont;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.UText;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 import net.sourceforge.plantuml.ugraphic.color.HColorUtils;
 
-public class DriverTextG2d implements UDriver<Graphics2D> {
+public class DriverTextG2d implements UDriver<UText, Graphics2D> {
 
 	private final EnsureVisible visible;
 	private final StringBounder stringBounder;
@@ -73,8 +72,7 @@ public class DriverTextG2d implements UDriver<Graphics2D> {
 		this.stringBounder = stringBounder;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
+	public void draw(UText shape, double x, double y, ColorMapper mapper, UParam param, Graphics2D g2d) {
-		final UText shape = (UText) ushape;
 		final FontConfiguration fontConfiguration = shape.getFontConfiguration();
 
 		if (HColorUtils.isTransparent(fontConfiguration.getColor())) {

src/net/sourceforge/plantuml/ugraphic/g2d/UGraphicG2d.java

@@ -148,7 +148,7 @@ public class UGraphicG2d extends AbstractUGraphic<Graphics2D> implements EnsureV
 		registerDriver(UPixel.class, new DriverPixelG2d());
 		registerDriver(UPolygon.class, new DriverPolygonG2d(dpiFactor, this));
 		registerDriver(UEllipse.class, new DriverEllipseG2d(dpiFactor, this));
-		registerDriver(UImageSvg.class, new DriverImageG2d(dpiFactor, this));
+		ignoreShape(UImageSvg.class);
 		registerDriver(UImage.class, new DriverImageG2d(dpiFactor, this));
 		registerDriver(DotPath.class, new DriverDotPathG2d(this));
 		registerDriver(UPath.class, new DriverPathG2d(dpiFactor));

src/net/sourceforge/plantuml/ugraphic/html5/DriverLineHtml5.java

@@ -41,10 +41,9 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.ULine;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverLineHtml5 implements UDriver<Html5Drawer> {
+public class DriverLineHtml5 implements UDriver<ULine, Html5Drawer> {
 
 	private final ClipContainer clipContainer;
 
@@ -52,9 +51,7 @@ public class DriverLineHtml5 implements UDriver<Html5Drawer> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Html5Drawer html) {
+	public void draw(ULine shape, double x, double y, ColorMapper mapper, UParam param, Html5Drawer html) {
-		final ULine shape = (ULine) ushape;
-
 		double x2 = x + shape.getDX();
 		double y2 = y + shape.getDY();
 

src/net/sourceforge/plantuml/ugraphic/html5/DriverNopHtml5.java

@@ -1,46 +0,0 @@
-/* ========================================================================
- * PlantUML : a free UML diagram generator
- * ========================================================================
- *
- * (C) Copyright 2009-2020, Arnaud Roques
- *
- * Project Info:  http://plantuml.com
- * 
- * If you like this project or if you find it useful, you can support us at:
- * 
- * http://plantuml.com/patreon (only 1$ per month!)
- * http://plantuml.com/paypal
- * 
- * This file is part of PlantUML.
- *
- * PlantUML is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * PlantUML distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
- * USA.
- *
- *
- * Original Author:  Arnaud Roques
- *
- */
-package net.sourceforge.plantuml.ugraphic.html5;
-
-import net.sourceforge.plantuml.ugraphic.UDriver;
-import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
-import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
-
-public class DriverNopHtml5 implements UDriver<Html5Drawer> {
-
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Html5Drawer html) {
-	}
-}

src/net/sourceforge/plantuml/ugraphic/html5/DriverRectangleHtml5.java

@@ -41,12 +41,11 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.URectangle;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 
-public class DriverRectangleHtml5 implements UDriver<Html5Drawer> {
+public class DriverRectangleHtml5 implements UDriver<URectangle, Html5Drawer> {
 
 	private final ClipContainer clipContainer;
 
@@ -54,9 +53,7 @@ public class DriverRectangleHtml5 implements UDriver<Html5Drawer> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, Html5Drawer html) {
+	public void draw(URectangle rect, double x, double y, ColorMapper mapper, UParam param, Html5Drawer html) {
-		final URectangle rect = (URectangle) ushape;
-
 		double width = rect.getWidth();
 		double height = rect.getHeight();
 
@@ -91,6 +88,5 @@ public class DriverRectangleHtml5 implements UDriver<Html5Drawer> {
 //					.getStroke().getDashSpace());
 			html.htmlRectangle(x, y, width, height, rx / 2, ry / 2);
 		}
-
 	}
 }

src/net/sourceforge/plantuml/ugraphic/html5/UGraphicHtml5.java

@@ -59,10 +59,10 @@ public class UGraphicHtml5 extends AbstractUGraphic<Html5Drawer> implements Clip
 		super(defaultBackground, colorMapper, FileFormat.PNG.getDefaultStringBounder(), new Html5Drawer());
 		registerDriver(URectangle.class, new DriverRectangleHtml5(this));
 		// registerDriver(UText.class, new DriverTextEps(imDummy, this, strategy));
-		registerDriver(UText.class, new DriverNopHtml5());
+		ignoreShape(UText.class);
 		registerDriver(ULine.class, new DriverLineHtml5(this));
 		// registerDriver(UPolygon.class, new DriverPolygonEps(this));
-		registerDriver(UPolygon.class, new DriverNopHtml5());
+		ignoreShape(UPolygon.class);
 		// registerDriver(UEllipse.class, new DriverEllipseEps());
 		// registerDriver(UImage.class, new DriverImageEps());
 		// registerDriver(UPath.class, new DriverPathEps());

src/net/sourceforge/plantuml/ugraphic/svg/DriverCenteredCharacterSvg.java

@@ -44,13 +44,11 @@ import net.sourceforge.plantuml.ugraphic.UCenteredCharacter;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UFont;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverCenteredCharacterSvg implements UDriver<SvgGraphics> {
+public class DriverCenteredCharacterSvg implements UDriver<UCenteredCharacter, SvgGraphics> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
+	public void draw(UCenteredCharacter characterCircled, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
-		final UCenteredCharacter characterCircled = (UCenteredCharacter) ushape;
 		final char c = characterCircled.getChar();
 		final UFont font = characterCircled.getFont();
 		final UnusedSpace unusedSpace = UnusedSpace.getUnusedSpace(font, c);
@@ -61,6 +59,5 @@ public class DriverCenteredCharacterSvg implements UDriver<SvgGraphics> {
 		final TextLayout t = createTextLayout(font, "" + c);
 		svg.setFillColor(mapper.toRGB(param.getColor()));
 		svg.drawPathIterator(xpos, ypos, t.getOutline(null).getPathIterator(null));
-
 	}
 }

src/net/sourceforge/plantuml/ugraphic/svg/DriverDotPathSvg.java

@@ -39,13 +39,11 @@ import net.sourceforge.plantuml.posimo.DotPath;
 import net.sourceforge.plantuml.svg.SvgGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverDotPathSvg implements UDriver<SvgGraphics> {
+public class DriverDotPathSvg implements UDriver<DotPath, SvgGraphics> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
+	public void draw(DotPath shape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
-		final DotPath shape = (DotPath) ushape;
 		// DriverLineG2d.manageStroke(param, g2d);
 
 		if (param.getColor() != null) {

src/net/sourceforge/plantuml/ugraphic/svg/DriverEllipseSvg.java

@@ -40,13 +40,12 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UEllipse;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorBackground;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 
-public class DriverEllipseSvg implements UDriver<SvgGraphics> {
+public class DriverEllipseSvg implements UDriver<UEllipse, SvgGraphics> {
 
 	private final ClipContainer clipContainer;
 
@@ -54,8 +53,7 @@ public class DriverEllipseSvg implements UDriver<SvgGraphics> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
+	public void draw(UEllipse shape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
-		final UEllipse shape = (UEllipse) ushape;
 		final double width = shape.getWidth();
 		final double height = shape.getHeight();
 

src/net/sourceforge/plantuml/ugraphic/svg/DriverImagePng.java

@@ -43,10 +43,9 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UImage;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverImagePng implements UDriver<SvgGraphics> {
+public class DriverImagePng implements UDriver<UImage, SvgGraphics> {
 
 	private final ClipContainer clipContainer;
 
@@ -54,9 +53,7 @@ public class DriverImagePng implements UDriver<SvgGraphics> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
+	public void draw(UImage image, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
-
-		final UImage image = (UImage) ushape;
 		final UClip clip = clipContainer.getClip();
 		if (clip != null) {
 			if (clip.isInside(x, y) == false) {

src/net/sourceforge/plantuml/ugraphic/svg/DriverImageSvgSvg.java

@@ -38,13 +38,11 @@ import net.sourceforge.plantuml.svg.SvgGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UImageSvg;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverImageSvgSvg implements UDriver<SvgGraphics> {
+public class DriverImageSvgSvg implements UDriver<UImageSvg, SvgGraphics> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
+	public void draw(UImageSvg image, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
-		final UImageSvg image = (UImageSvg) ushape;
 		svg.svgImage(image, x, y);
 	}
 }

src/net/sourceforge/plantuml/ugraphic/svg/DriverLineSvg.java

@@ -42,12 +42,11 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.ULine;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 
-public class DriverLineSvg implements UDriver<SvgGraphics> {
+public class DriverLineSvg implements UDriver<ULine, SvgGraphics> {
 
 	private final ClipContainer clipContainer;
 
@@ -55,9 +54,7 @@ public class DriverLineSvg implements UDriver<SvgGraphics> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
+	public void draw(ULine shape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
-		final ULine shape = (ULine) ushape;
-
 		double x2 = x + shape.getDX();
 		double y2 = y + shape.getDY();
 

src/net/sourceforge/plantuml/ugraphic/svg/DriverNoneSvg.java

@@ -1,48 +0,0 @@
-/* ========================================================================
- * PlantUML : a free UML diagram generator
- * ========================================================================
- *
- * (C) Copyright 2009-2020, Arnaud Roques
- *
- * Project Info:  http://plantuml.com
- * 
- * If you like this project or if you find it useful, you can support us at:
- * 
- * http://plantuml.com/patreon (only 1$ per month!)
- * http://plantuml.com/paypal
- * 
- * This file is part of PlantUML.
- *
- * PlantUML is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * PlantUML distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
- * USA.
- *
- *
- * Original Author:  Arnaud Roques
- *
- */
-package net.sourceforge.plantuml.ugraphic.svg;
-
-import net.sourceforge.plantuml.svg.SvgGraphics;
-import net.sourceforge.plantuml.ugraphic.UDriver;
-import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
-import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
-
-public class DriverNoneSvg implements UDriver<SvgGraphics> {
-
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics object) {
-	}
-
-}

src/net/sourceforge/plantuml/ugraphic/svg/DriverPathSvg.java

@@ -40,13 +40,12 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.UPath;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 import net.sourceforge.plantuml.ugraphic.g2d.DriverShadowedG2d;
 
-public class DriverPathSvg extends DriverShadowedG2d implements UDriver<SvgGraphics> {
+public class DriverPathSvg extends DriverShadowedG2d implements UDriver<UPath, SvgGraphics> {
 
 	private final ClipContainer clipContainer;
 
@@ -54,9 +53,7 @@ public class DriverPathSvg extends DriverShadowedG2d implements UDriver<SvgGraph
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
+	public void draw(UPath shape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
-		final UPath shape = (UPath) ushape;
-
 		final UClip clip = clipContainer.getClip();
 		if (clip != null && clip.isInside(x, y, shape) == false) {
 			return;

src/net/sourceforge/plantuml/ugraphic/svg/DriverPixelSvg.java

@@ -37,14 +37,14 @@ package net.sourceforge.plantuml.ugraphic.svg;
 import net.sourceforge.plantuml.svg.SvgGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
+import net.sourceforge.plantuml.ugraphic.UPixel;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 
-public class DriverPixelSvg implements UDriver<SvgGraphics> {
+public class DriverPixelSvg implements UDriver<UPixel, SvgGraphics> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
+	public void draw(UPixel pixel, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
 		final HColor color = param.getColor();
 		if (color instanceof HColorGradient) {
 			final HColorGradient gr = (HColorGradient) color;

src/net/sourceforge/plantuml/ugraphic/svg/DriverPolygonSvg.java

@@ -40,12 +40,11 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.UPolygon;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 
-public class DriverPolygonSvg implements UDriver<SvgGraphics> {
+public class DriverPolygonSvg implements UDriver<UPolygon, SvgGraphics> {
 
 	private final ClipContainer clipContainer;
 
@@ -53,9 +52,7 @@ public class DriverPolygonSvg implements UDriver<SvgGraphics> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
+	public void draw(UPolygon shape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
-		final UPolygon shape = (UPolygon) ushape;
-
 		final double points[] = shape.getPointArray(x, y);
 		assert points.length % 2 == 0;
 		final UClip clip = clipContainer.getClip();

src/net/sourceforge/plantuml/ugraphic/svg/DriverRectangleSvg.java

@@ -42,12 +42,11 @@ import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.URectangle;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 
-public class DriverRectangleSvg implements UDriver<SvgGraphics> {
+public class DriverRectangleSvg implements UDriver<URectangle, SvgGraphics> {
 
 	private final ClipContainer clipContainer;
 
@@ -55,9 +54,7 @@ public class DriverRectangleSvg implements UDriver<SvgGraphics> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
+	public void draw(URectangle rect, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
-		final URectangle rect = (URectangle) ushape;
-
 		final double rx = rect.getRx();
 		final double ry = rect.getRy();
 		double width = rect.getWidth();

src/net/sourceforge/plantuml/ugraphic/svg/DriverTextAsPathSvg.java

@@ -43,11 +43,10 @@ import net.sourceforge.plantuml.ugraphic.ClipContainer;
 import net.sourceforge.plantuml.ugraphic.UClip;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.UText;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverTextAsPathSvg implements UDriver<SvgGraphics> {
+public class DriverTextAsPathSvg implements UDriver<UText, SvgGraphics> {
 
 	private final ClipContainer clipContainer;
 
@@ -55,14 +54,13 @@ public class DriverTextAsPathSvg implements UDriver<SvgGraphics> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
+	public void draw(UText ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
-
 		final UClip clip = clipContainer.getClip();
 		if (clip != null && clip.isInside(x, y) == false) {
 			return;
 		}
 
-		final TextLayout t = createTextLayout((UText) ushape);
+		final TextLayout t = createTextLayout(ushape);
 		svg.drawPathIterator(x, y, t.getOutline(null).getPathIterator(null));
 	}
 

src/net/sourceforge/plantuml/ugraphic/svg/DriverTextSvg.java

@@ -47,14 +47,13 @@ import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UFont;
 import net.sourceforge.plantuml.ugraphic.UFontContext;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.UText;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 import net.sourceforge.plantuml.ugraphic.color.HColorUtils;
 
-public class DriverTextSvg implements UDriver<SvgGraphics> {
+public class DriverTextSvg implements UDriver<UText, SvgGraphics> {
 
 	private final StringBounder stringBounder;
 	private final ClipContainer clipContainer;
@@ -64,14 +63,12 @@ public class DriverTextSvg implements UDriver<SvgGraphics> {
 		this.clipContainer = clipContainer;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
+	public void draw(UText shape, double x, double y, ColorMapper mapper, UParam param, SvgGraphics svg) {
-
 		final UClip clip = clipContainer.getClip();
 		if (clip != null && clip.isInside(x, y) == false) {
 			return;
 		}
 
-		final UText shape = (UText) ushape;
 		final FontConfiguration fontConfiguration = shape.getFontConfiguration();
 		if (HColorUtils.isTransparent(fontConfiguration.getColor())) {
 			return;

src/net/sourceforge/plantuml/ugraphic/tikz/DriverAtomTextTikz.java

@@ -41,14 +41,12 @@ import net.sourceforge.plantuml.tikz.TikzGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UFont;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 
-public class DriverAtomTextTikz implements UDriver<TikzGraphics> {
+public class DriverAtomTextTikz implements UDriver<AtomText, TikzGraphics> {
 
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
+	public void draw(AtomText text, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
-		final AtomText text = (AtomText) shape;
 		final FontConfiguration fontConfiguration = text.getFontConfiguration();
 		final UFont font = fontConfiguration.getFont();
 		final HColor col = fontConfiguration.getColor();
@@ -57,7 +55,6 @@ public class DriverAtomTextTikz implements UDriver<TikzGraphics> {
 		final boolean italic = font.isItalic();
 		final boolean bold = font.isBold();
 		tikz.text(x, y, text.getText(), underline, italic, bold);
-
 	}
 
 }

src/net/sourceforge/plantuml/ugraphic/tikz/DriverCenteredCharacterTikz.java

@@ -44,13 +44,11 @@ import net.sourceforge.plantuml.ugraphic.UCenteredCharacter;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UFont;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverCenteredCharacterTikz implements UDriver<TikzGraphics> {
+public class DriverCenteredCharacterTikz implements UDriver<UCenteredCharacter, TikzGraphics> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
+	public void draw(UCenteredCharacter centeredCharacter, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
-		final UCenteredCharacter centeredCharacter = (UCenteredCharacter) ushape;
 		final char c = centeredCharacter.getChar();
 		final UFont font = centeredCharacter.getFont();
 		final UnusedSpace unusedSpace = UnusedSpace.getUnusedSpace(font, c);
@@ -61,7 +59,6 @@ public class DriverCenteredCharacterTikz implements UDriver<TikzGraphics> {
 		final TextLayout t = createTextLayout(font, "" + c);
 		tikz.setStrokeColor(mapper.toColor(param.getColor()));
 		tikz.drawPathIterator(xpos, ypos, t.getOutline(null).getPathIterator(null));
-
 	}
 
 }

src/net/sourceforge/plantuml/ugraphic/tikz/DriverCenteredCharacterTikz2.java

@@ -38,18 +38,15 @@ import net.sourceforge.plantuml.tikz.TikzGraphics;
 import net.sourceforge.plantuml.ugraphic.UCenteredCharacter;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverCenteredCharacterTikz2 implements UDriver<TikzGraphics> {
+public class DriverCenteredCharacterTikz2 implements UDriver<UCenteredCharacter, TikzGraphics> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
+	public void draw(UCenteredCharacter centeredCharacter, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
-		final UCenteredCharacter centeredCharacter = (UCenteredCharacter) ushape;
 		final char c = centeredCharacter.getChar();
 
 		tikz.setStrokeColor(mapper.toColor(param.getColor()));
 		tikz.drawSingleCharacter(x, y, c);
-
 	}
 
 }

src/net/sourceforge/plantuml/ugraphic/tikz/DriverDotPathTikz.java

@@ -38,13 +38,11 @@ import net.sourceforge.plantuml.posimo.DotPath;
 import net.sourceforge.plantuml.tikz.TikzGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverDotPathTikz implements UDriver<TikzGraphics> {
+public class DriverDotPathTikz implements UDriver<DotPath, TikzGraphics> {
 
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
+	public void draw(DotPath path, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
-		final DotPath path = (DotPath) shape;
 		tikz.setFillColor(null);
 		tikz.setStrokeColor(mapper.toColor(param.getColor()));
 		tikz.setStrokeWidth(param.getStroke().getThickness(), param.getStroke().getDashTikz());

src/net/sourceforge/plantuml/ugraphic/tikz/DriverEllipseTikz.java

@@ -38,13 +38,11 @@ import net.sourceforge.plantuml.tikz.TikzGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UEllipse;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverEllipseTikz implements UDriver<TikzGraphics> {
+public class DriverEllipseTikz implements UDriver<UEllipse, TikzGraphics> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
+	public void draw(UEllipse shape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
-		final UEllipse shape = (UEllipse) ushape;
 		final double width = shape.getWidth();
 		final double height = shape.getHeight();
 

src/net/sourceforge/plantuml/ugraphic/tikz/DriverImageTikz.java

@@ -38,13 +38,11 @@ import net.sourceforge.plantuml.tikz.TikzGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UImage;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverImageTikz implements UDriver<TikzGraphics> {
+public class DriverImageTikz implements UDriver<UImage, TikzGraphics> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
+	public void draw(UImage shape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
-		final UImage shape = (UImage) ushape;
 		final String rawFileName = shape.getRawFileName();
 		if (rawFileName != null) {
 			final String raw = "\\includegraphics{" + rawFileName + "}";

src/net/sourceforge/plantuml/ugraphic/tikz/DriverLineTikz.java

@@ -38,14 +38,11 @@ import net.sourceforge.plantuml.tikz.TikzGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.ULine;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverLineTikz implements UDriver<TikzGraphics> {
+public class DriverLineTikz implements UDriver<ULine, TikzGraphics> {
-
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
-		final ULine line = (ULine) shape;
 
+	public void draw(ULine line, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
 		double x2 = x + line.getDX();
 		double y2 = y + line.getDY();
 		tikz.setStrokeColor(mapper.toColor(param.getColor()));

src/net/sourceforge/plantuml/ugraphic/tikz/DriverNoneTikz.java

@@ -1,48 +0,0 @@
-/* ========================================================================
- * PlantUML : a free UML diagram generator
- * ========================================================================
- *
- * (C) Copyright 2009-2020, Arnaud Roques
- *
- * Project Info:  http://plantuml.com
- * 
- * If you like this project or if you find it useful, you can support us at:
- * 
- * http://plantuml.com/patreon (only 1$ per month!)
- * http://plantuml.com/paypal
- * 
- * This file is part of PlantUML.
- *
- * PlantUML is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * PlantUML distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
- * USA.
- *
- *
- * Original Author:  Arnaud Roques
- *
- */
-package net.sourceforge.plantuml.ugraphic.tikz;
-
-import net.sourceforge.plantuml.tikz.TikzGraphics;
-import net.sourceforge.plantuml.ugraphic.UDriver;
-import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
-import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
-
-public class DriverNoneTikz implements UDriver<TikzGraphics> {
-
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics object) {
-	}
-
-}

src/net/sourceforge/plantuml/ugraphic/tikz/DriverPathTikz.java

@@ -40,15 +40,13 @@ import net.sourceforge.plantuml.tikz.TikzGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.UPath;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 
-public class DriverUPathTikz implements UDriver<TikzGraphics> {
+public class DriverPathTikz implements UDriver<UPath, TikzGraphics> {
 
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
+	public void draw(UPath path, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
-		final UPath path = (UPath) shape;
 		final HColor back = param.getBackcolor();
 		if (back instanceof HColorGradient) {
 			final HColorGradient gr = (HColorGradient) back;

src/net/sourceforge/plantuml/ugraphic/tikz/DriverPolygonTikz.java

@@ -40,15 +40,13 @@ import net.sourceforge.plantuml.tikz.TikzGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.UPolygon;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 
-public class DriverPolygonTikz implements UDriver<TikzGraphics> {
+public class DriverPolygonTikz implements UDriver<UPolygon, TikzGraphics> {
 
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
+	public void draw(UPolygon poly, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
-		final UPolygon poly = (UPolygon) shape;
 		final double points[] = poly.getPointArray(x, y);
 
 		final HColor back = param.getBackcolor();

src/net/sourceforge/plantuml/ugraphic/tikz/DriverRectangleTikz.java

@@ -40,17 +40,14 @@ import net.sourceforge.plantuml.tikz.TikzGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.URectangle;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
 import net.sourceforge.plantuml.utils.MathUtils;
 
-public class DriverRectangleTikz implements UDriver<TikzGraphics> {
+public class DriverRectangleTikz implements UDriver<URectangle, TikzGraphics> {
-
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
-		final URectangle rect = (URectangle) shape;
 
+	public void draw(URectangle rect, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
 		final double width = rect.getWidth();
 		final double height = rect.getHeight();
 		final double r = MathUtils.min(rect.getRx(), rect.getRy(), width / 2, height / 2);

src/net/sourceforge/plantuml/ugraphic/tikz/DriverTextTikz.java

@@ -40,15 +40,13 @@ import net.sourceforge.plantuml.tikz.TikzGraphics;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UFont;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.UText;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 import net.sourceforge.plantuml.ugraphic.color.HColor;
 
-public class DriverUTextTikz implements UDriver<TikzGraphics> {
+public class DriverTextTikz implements UDriver<UText, TikzGraphics> {
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
+	public void draw(UText shape, double x, double y, ColorMapper mapper, UParam param, TikzGraphics tikz) {
-		final UText shape = (UText) ushape;
 		final FontConfiguration fontConfiguration = shape.getFontConfiguration();
 		final UFont font = fontConfiguration.getFont();
 		final HColor col = fontConfiguration.getColor();

src/net/sourceforge/plantuml/ugraphic/tikz/UGraphicTikz.java

@@ -76,14 +76,14 @@ public class UGraphicTikz extends AbstractUGraphic<TikzGraphics> implements Clip
 
 	private void register() {
 		registerDriver(URectangle.class, new DriverRectangleTikz());
-		registerDriver(UText.class, new DriverUTextTikz());
+		registerDriver(UText.class, new DriverTextTikz());
 		registerDriver(AtomText.class, new DriverAtomTextTikz());
 		registerDriver(ULine.class, new DriverLineTikz());
 		registerDriver(UPolygon.class, new DriverPolygonTikz());
 		registerDriver(UEllipse.class, new DriverEllipseTikz());
 		registerDriver(UImage.class, new DriverImageTikz());
-		registerDriver(UImageSvg.class, new DriverNoneTikz());
+		ignoreShape(UImageSvg.class);
-		registerDriver(UPath.class, new DriverUPathTikz());
+		registerDriver(UPath.class, new DriverPathTikz());
 		registerDriver(DotPath.class, new DriverDotPathTikz());
 		// registerDriver(UCenteredCharacter.class, new DriverCenteredCharacterTikz());
 		registerDriver(UCenteredCharacter.class, new DriverCenteredCharacterTikz2());

src/net/sourceforge/plantuml/ugraphic/visio/DriverDotPathVdx.java

@@ -37,13 +37,11 @@ package net.sourceforge.plantuml.ugraphic.visio;
 import net.sourceforge.plantuml.posimo.DotPath;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverDotPathVdx implements UDriver<VisioGraphics> {
+public class DriverDotPathVdx implements UDriver<DotPath, VisioGraphics> {
 
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, VisioGraphics visio) {
+	public void draw(DotPath path, double x, double y, ColorMapper mapper, UParam param, VisioGraphics visio) {
-		final DotPath path = (DotPath) shape;
 		visio.upath(x, y, path.toUPath());
 	}
 

src/net/sourceforge/plantuml/ugraphic/visio/DriverLineVdx.java

@@ -37,19 +37,14 @@ package net.sourceforge.plantuml.ugraphic.visio;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.ULine;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverLineVdx implements UDriver<VisioGraphics> {
+public class DriverLineVdx implements UDriver<ULine, VisioGraphics> {
-
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, VisioGraphics visio) {
-		final ULine line = (ULine) shape;
 
+	public void draw(ULine line, double x, double y, ColorMapper mapper, UParam param, VisioGraphics visio) {
 		final double dx = line.getDX();
 		final double dy = line.getDY();
-
 		visio.line(x, y, x + dx, y + dy);
-
 	}
 
 }

src/net/sourceforge/plantuml/ugraphic/visio/DriverNoneVdx.java

@@ -1,47 +0,0 @@
-/* ========================================================================
- * PlantUML : a free UML diagram generator
- * ========================================================================
- *
- * (C) Copyright 2009-2020, Arnaud Roques
- *
- * Project Info:  http://plantuml.com
- * 
- * If you like this project or if you find it useful, you can support us at:
- * 
- * http://plantuml.com/patreon (only 1$ per month!)
- * http://plantuml.com/paypal
- * 
- * This file is part of PlantUML.
- *
- * PlantUML is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * PlantUML distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
- * USA.
- *
- *
- * Original Author:  Arnaud Roques
- *
- */
-package net.sourceforge.plantuml.ugraphic.visio;
-
-import net.sourceforge.plantuml.ugraphic.UDriver;
-import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
-import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
-
-public class DriverNoneVdx implements UDriver<VisioGraphics> {
-
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, VisioGraphics object) {
-	}
-
-}

src/net/sourceforge/plantuml/ugraphic/visio/DriverPathVdx.java

@@ -37,16 +37,12 @@ package net.sourceforge.plantuml.ugraphic.visio;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.UPath;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverUPathVdx implements UDriver<VisioGraphics> {
+public class DriverPathVdx implements UDriver<UPath, VisioGraphics> {
-
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, VisioGraphics visio) {
-		final UPath path = (UPath) shape;
 
+	public void draw(UPath path, double x, double y, ColorMapper mapper, UParam param, VisioGraphics visio) {
 		visio.upath(x, y, path);
-
 	}
 
 }

src/net/sourceforge/plantuml/ugraphic/visio/DriverPolygonVdx.java

@@ -37,13 +37,11 @@ package net.sourceforge.plantuml.ugraphic.visio;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.UPolygon;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverPolygonVdx implements UDriver<VisioGraphics> {
+public class DriverPolygonVdx implements UDriver<UPolygon, VisioGraphics> {
 
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, VisioGraphics visio) {
+	public void draw(UPolygon poly, double x, double y, ColorMapper mapper, UParam param, VisioGraphics visio) {
-		final UPolygon poly = (UPolygon) shape;
 		visio.polygon(poly.translate(x, y));
 	}
 

src/net/sourceforge/plantuml/ugraphic/visio/DriverRectangleVdx.java

@@ -37,19 +37,14 @@ package net.sourceforge.plantuml.ugraphic.visio;
 import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UParam;
 import net.sourceforge.plantuml.ugraphic.URectangle;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverRectangleVdx implements UDriver<VisioGraphics> {
+public class DriverRectangleVdx implements UDriver<URectangle, VisioGraphics> {
-
-	public void draw(UShape shape, double x, double y, ColorMapper mapper, UParam param, VisioGraphics visio) {
-		final URectangle rect = (URectangle) shape;
 
+	public void draw(URectangle rect, double x, double y, ColorMapper mapper, UParam param, VisioGraphics visio) {
 		final double width = rect.getWidth();
 		final double height = rect.getHeight();
-
 		visio.rectangle(x, y, width, height);
-
 	}
 
 }

src/net/sourceforge/plantuml/ugraphic/visio/DriverTextVdx.java

@@ -43,11 +43,10 @@ import net.sourceforge.plantuml.ugraphic.UDriver;
 import net.sourceforge.plantuml.ugraphic.UFont;
 import net.sourceforge.plantuml.ugraphic.UFontContext;
 import net.sourceforge.plantuml.ugraphic.UParam;
-import net.sourceforge.plantuml.ugraphic.UShape;
 import net.sourceforge.plantuml.ugraphic.UText;
 import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
 
-public class DriverTextVdx implements UDriver<VisioGraphics> {
+public class DriverTextVdx implements UDriver<UText, VisioGraphics> {
 
 	private final StringBounder stringBounder;
 
@@ -55,8 +54,7 @@ public class DriverTextVdx implements UDriver<VisioGraphics> {
 		this.stringBounder = stringBounder;
 	}
 
-	public void draw(UShape ushape, double x, double y, ColorMapper mapper, UParam param, VisioGraphics visio) {
+	public void draw(UText shape, double x, double y, ColorMapper mapper, UParam param, VisioGraphics visio) {
-		final UText shape = (UText) ushape;
 		Thread.dumpStack();
 
 		final FontConfiguration fontConfiguration = shape.getFontConfiguration();

src/net/sourceforge/plantuml/ugraphic/visio/UGraphicVdx.java

@@ -85,15 +85,15 @@ public class UGraphicVdx extends AbstractUGraphic<VisioGraphics> implements Clip
 	private void register() {
 		registerDriver(URectangle.class, new DriverRectangleVdx());
 		registerDriver(UText.class, new DriverTextVdx(getStringBounder()));
-		registerDriver(AtomText.class, new DriverNoneVdx());
+		ignoreShape(AtomText.class);
 		registerDriver(ULine.class, new DriverLineVdx());
 		registerDriver(UPolygon.class, new DriverPolygonVdx());
-		registerDriver(UEllipse.class, new DriverNoneVdx());
+		ignoreShape(UEllipse.class);
-		registerDriver(UImage.class, new DriverNoneVdx());
+		ignoreShape(UImage.class);
-		registerDriver(UImageSvg.class, new DriverNoneVdx());
+		ignoreShape(UImageSvg.class);
-		registerDriver(UPath.class, new DriverUPathVdx());
+		registerDriver(UPath.class, new DriverPathVdx());
 		registerDriver(DotPath.class, new DriverDotPathVdx());
-		registerDriver(UCenteredCharacter.class, new DriverNoneVdx());
+		ignoreShape(UCenteredCharacter.class);
 	}
 
 	@Override