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Code Issues Releases Wiki Activity

Reuse long-lived XML DocumentBuilderFactory & TransformerFactory instances.

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This commit is contained in:
matthew16550 2021-10-07 02:59:13 +11:00
parent c874842158
commit cd6f988eac
7 changed files with 52 additions and 48 deletions
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9
src/net/sourceforge/plantuml/stats/XmlConverter.java
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@ -42,12 +42,10 @@ import java.util.Date;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
@ -59,6 +57,7 @@ import net.sourceforge.plantuml.stats.api.Stats;
import net.sourceforge.plantuml.stats.api.StatsColumn;
import net.sourceforge.plantuml.stats.api.StatsLine;
import net.sourceforge.plantuml.stats.api.StatsTable;
import net.sourceforge.plantuml.xml.XmlFactories;
public class XmlConverter {
@ -71,8 +70,7 @@ public class XmlConverter {
}
private Document getDocument() throws ParserConfigurationException {
final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
final DocumentBuilder builder = factory.newDocumentBuilder();
final DocumentBuilder builder = XmlFactories.newDocumentBuilder();
final Document document = builder.newDocument();
document.setXmlStandalone(true);
@ -124,8 +122,7 @@ public class XmlConverter {
}
private Transformer getTransformer() throws TransformerException {
final TransformerFactory xformFactory = TransformerFactory.newInstance();
final Transformer transformer = xformFactory.newTransformer();
final Transformer transformer = XmlFactories.newTransformer();
transformer.setOutputProperty(OutputKeys.STANDALONE, "yes");
return transformer;
}

21
src/net/sourceforge/plantuml/svg/SvgGraphics.java
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@ -53,12 +53,10 @@ import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
@ -81,6 +79,7 @@ import net.sourceforge.plantuml.ugraphic.USegment;
import net.sourceforge.plantuml.ugraphic.USegmentType;
import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
import net.sourceforge.plantuml.ugraphic.color.HColorGradient;
import net.sourceforge.plantuml.xml.XmlFactories;
public class SvgGraphics {
@ -240,9 +239,7 @@ public class SvgGraphics {
}
private Document getDocument() throws ParserConfigurationException {
final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
final DocumentBuilder builder = factory.newDocumentBuilder();
final DocumentBuilder builder = XmlFactories.newDocumentBuilder();
final Document document = builder.newDocument();
document.setXmlStandalone(true);
return document;
@ -569,19 +566,7 @@ public class SvgGraphics {
}
private Transformer getTransformer() throws TransformerException {
// Get a TransformerFactory object.
TransformerFactory xformFactory = null;
// try {
// final Class<?> factoryClass = Class
// .forName("com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl");
// xformFactory = (TransformerFactory) factoryClass.newInstance();
// } catch (Exception e) {
xformFactory = TransformerFactory.newInstance();
// }
Log.info("TransformerFactory=" + xformFactory.getClass());
// Get an XSL Transformer object.
final Transformer transformer = xformFactory.newTransformer();
final Transformer transformer = XmlFactories.newTransformer();
Log.info("Transformer=" + transformer.getClass());
// // Sets the standalone property in the first line of

9
src/net/sourceforge/plantuml/xmi/XmiClassDiagramAbstract.java
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@ -42,14 +42,12 @@ import java.util.HashSet;
import java.util.Set;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
@ -64,6 +62,7 @@ import net.sourceforge.plantuml.cucadiagram.Member;
import net.sourceforge.plantuml.cucadiagram.Stereotype;
import net.sourceforge.plantuml.skin.VisibilityModifier;
import net.sourceforge.plantuml.utils.UniqueSequence;
import net.sourceforge.plantuml.xml.XmlFactories;
abstract class XmiClassDiagramAbstract implements IXmiClassDiagram {
@ -78,9 +77,8 @@ abstract class XmiClassDiagramAbstract implements IXmiClassDiagram {
public XmiClassDiagramAbstract(ClassDiagram classDiagram) throws ParserConfigurationException {
this.classDiagram = classDiagram;
final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
final DocumentBuilder builder = factory.newDocumentBuilder();
final DocumentBuilder builder = XmlFactories.newDocumentBuilder();
this.document = builder.newDocument();
document.setXmlVersion("1.0");
document.setXmlStandalone(true);
@ -131,8 +129,7 @@ abstract class XmiClassDiagramAbstract implements IXmiClassDiagram {
final Result resultat = new StreamResult(os);
final TransformerFactory fabrique = TransformerFactory.newInstance();
final Transformer transformer = fabrique.newTransformer();
final Transformer transformer = XmlFactories.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
// transformer.setOutputProperty(OutputKeys.ENCODING, "ISO-8859-1");
transformer.setOutputProperty(OutputKeys.ENCODING, UTF_8.name());

9
src/net/sourceforge/plantuml/xmi/XmiDescriptionDiagram.java
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@ -40,14 +40,12 @@ import static java.nio.charset.StandardCharsets.UTF_8;
import java.io.OutputStream;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
@ -63,6 +61,7 @@ import net.sourceforge.plantuml.cucadiagram.LinkDecor;
import net.sourceforge.plantuml.descdiagram.DescriptionDiagram;
import net.sourceforge.plantuml.utils.UniqueSequence;
import net.sourceforge.plantuml.version.Version;
import net.sourceforge.plantuml.xml.XmlFactories;
public class XmiDescriptionDiagram implements IXmiClassDiagram {
@ -72,9 +71,8 @@ public class XmiDescriptionDiagram implements IXmiClassDiagram {
public XmiDescriptionDiagram(DescriptionDiagram diagram) throws ParserConfigurationException {
this.diagram = diagram;
final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
final DocumentBuilder builder = factory.newDocumentBuilder();
final DocumentBuilder builder = XmlFactories.newDocumentBuilder();
this.document = builder.newDocument();
document.setXmlVersion("1.0");
document.setXmlStandalone(true);
@ -232,8 +230,7 @@ public class XmiDescriptionDiagram implements IXmiClassDiagram {
final Result resultat = new StreamResult(os);
final TransformerFactory fabrique = TransformerFactory.newInstance();
final Transformer transformer = fabrique.newTransformer();
final Transformer transformer = XmlFactories.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
// transformer.setOutputProperty(OutputKeys.ENCODING, "ISO-8859-1");
transformer.setOutputProperty(OutputKeys.ENCODING, UTF_8.name());

9
src/net/sourceforge/plantuml/xmi/XmiStateDiagram.java
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@ -40,14 +40,12 @@ import static java.nio.charset.StandardCharsets.UTF_8;
import java.io.OutputStream;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
@ -63,6 +61,7 @@ import net.sourceforge.plantuml.cucadiagram.LinkDecor;
import net.sourceforge.plantuml.statediagram.StateDiagram;
import net.sourceforge.plantuml.utils.UniqueSequence;
import net.sourceforge.plantuml.version.Version;
import net.sourceforge.plantuml.xml.XmlFactories;
public class XmiStateDiagram implements IXmiClassDiagram {
@ -72,9 +71,8 @@ public class XmiStateDiagram implements IXmiClassDiagram {
public XmiStateDiagram(StateDiagram diagram) throws ParserConfigurationException {
this.diagram = diagram;
final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
final DocumentBuilder builder = factory.newDocumentBuilder();
final DocumentBuilder builder = XmlFactories.newDocumentBuilder();
this.document = builder.newDocument();
document.setXmlVersion("1.0");
document.setXmlStandalone(true);
@ -246,8 +244,7 @@ public class XmiStateDiagram implements IXmiClassDiagram {
final Result resultat = new StreamResult(os);
final TransformerFactory fabrique = TransformerFactory.newInstance();
final Transformer transformer = fabrique.newTransformer();
final Transformer transformer = XmlFactories.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
// transformer.setOutputProperty(OutputKeys.ENCODING, "ISO-8859-1");
transformer.setOutputProperty(OutputKeys.ENCODING, UTF_8.name());

34
src/net/sourceforge/plantuml/xml/XmlFactories.java Normal file
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@ -0,0 +1,34 @@
package net.sourceforge.plantuml.xml;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerFactory;
public class XmlFactories {
private XmlFactories() {
}
// This class uses the "initialization-on-demand holder" idiom to provide thread-safe
// lazy initialization of expensive factories.
// (see https://stackoverflow.com/a/8297830/1848731)
private static class DocumentBuilderFactoryHolder {
static final DocumentBuilderFactory INSTANCE = DocumentBuilderFactory.newInstance();
}
private static class TransformerFactoryHolder {
static final TransformerFactory INSTANCE = TransformerFactory.newInstance();
}
public static DocumentBuilder newDocumentBuilder() throws ParserConfigurationException {
return DocumentBuilderFactoryHolder.INSTANCE.newDocumentBuilder();
}
public static Transformer newTransformer() throws TransformerConfigurationException {
return TransformerFactoryHolder.INSTANCE.newTransformer();
}
}

9
src/net/sourceforge/plantuml/xmlsc/ScxmlStateDiagramStandard.java
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@ -40,14 +40,12 @@ import static java.nio.charset.StandardCharsets.UTF_8;
import java.io.OutputStream;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
@ -59,6 +57,7 @@ import net.sourceforge.plantuml.cucadiagram.IEntity;
import net.sourceforge.plantuml.cucadiagram.LeafType;
import net.sourceforge.plantuml.cucadiagram.Link;
import net.sourceforge.plantuml.statediagram.StateDiagram;
import net.sourceforge.plantuml.xml.XmlFactories;
public class ScxmlStateDiagramStandard {
@ -67,9 +66,8 @@ public class ScxmlStateDiagramStandard {
public ScxmlStateDiagramStandard(StateDiagram diagram) throws ParserConfigurationException {
this.diagram = diagram;
final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
final DocumentBuilder builder = factory.newDocumentBuilder();
final DocumentBuilder builder = XmlFactories.newDocumentBuilder();
this.document = builder.newDocument();
document.setXmlVersion("1.0");
document.setXmlStandalone(true);
@ -132,8 +130,7 @@ public class ScxmlStateDiagramStandard {
final Result resultat = new StreamResult(os);
final TransformerFactory fabrique = TransformerFactory.newInstance();
final Transformer transformer = fabrique.newTransformer();
final Transformer transformer = XmlFactories.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty(OutputKeys.ENCODING, UTF_8.name());
transformer.transform(source, resultat);