mirror of https://github.com/octoleo/plantuml.git
96 lines
2.8 KiB
Java
96 lines
2.8 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* (C) Copyright 2009-2024, Arnaud Roques
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*
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* Project Info: https://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* https://plantuml.com/patreon (only 1$ per month!)
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* https://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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*
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* Original Author: Arnaud Roques
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*
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*/
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package net.sourceforge.plantuml.cheneer;
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import java.util.Map;
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import java.util.Stack;
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import net.sourceforge.plantuml.abel.Entity;
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import net.sourceforge.plantuml.classdiagram.AbstractEntityDiagram;
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import net.sourceforge.plantuml.core.UmlSource;
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import net.sourceforge.plantuml.skin.UmlDiagramType;
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public class ChenEerDiagram extends AbstractEntityDiagram {
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public ChenEerDiagram(UmlSource source, Map<String, String> skinParam) {
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super(source, UmlDiagramType.CHEN_EER, skinParam);
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}
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private final Stack<Entity> ownerStack = new Stack<Entity>();
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/**
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* Pushes the owner of the following attributes.
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*
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* @see #peekOwner()
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* @param group the entity that owns the following attributes
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*/
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public void pushOwner(Entity group) {
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ownerStack.push(group);
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}
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/**
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* Pops an attribute owner from the stack. See also {@link #peekOwner()}.
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*
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* @see #peekOwner()
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* @return true if an owner was popped, false if the stack was empty
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*/
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public boolean popOwner() {
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if (ownerStack.isEmpty()) {
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return false;
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}
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ownerStack.pop();
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return true;
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}
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/**
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* Returns the owner of the current attribute.
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*
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* <p>
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* This is used to link attributes based on their lexical position (how they
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* appear in sources) without nesting the entities (like how packages are
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* done). It is for this reason that we can't use CucaDiagram.getCurrentGroup,
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* as that method nests the entities.
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*
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* @return the owner of the current attribute, or null if there is no owner
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*/
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public Entity peekOwner() {
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if (ownerStack.isEmpty()) {
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return null;
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}
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return ownerStack.peek();
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}
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}
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