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PlantUML is a component that allows to quickly write diagrams from text.
There is a newer version: 1.2024.8
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
 * |
 * |      PlantUML : a free UML diagram generator
 * |
 * +=======================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 *
 * If you like this project or if you find it useful, you can support us at:
 *
 * https://plantuml.com/patreon (only 1$ per month!)
 * https://plantuml.com/liberapay (only 1€ per month!)
 * https://plantuml.com/paypal
 *
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see .
 *
 * PlantUML can occasionally display sponsored or advertising messages. Those
 * messages are usually generated on welcome or error images and never on
 * functional diagrams.
 * See https://plantuml.com/professional if you want to remove them
 *
 * Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
 * are owned by the author of their corresponding sources code (that is, their
 * textual description in PlantUML language). Those images are not covered by
 * this LGPL license.
 *
 * The generated images can then be used without any reference to the LGPL license.
 * It is not even necessary to stipulate that they have been generated with PlantUML,
 * although this will be appreciated by the PlantUML team.
 *
 * There is an exception : if the textual description in PlantUML language is also covered
 * by any license, then the generated images are logically covered
 * by the very same license.
 *
 * This is the IGY distribution (Install GraphViz by Yourself).
 * You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
 * (see https://plantuml.com/graphviz-dot )
 *
 * Icons provided by OpenIconic :  https://useiconic.com/open
 * Archimate sprites provided by Archi :  http://www.archimatetool.com
 * Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
 * Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
 * ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
 * Brotli (c) by the Brotli Authors https://github.com/google/brotli
 * Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
 * Twemoji (c) by Twitter at https://twemoji.twitter.com/
 *
 */
package net.sourceforge.plantuml.classdiagram;

import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;

import net.sourceforge.plantuml.FileFormatOption;
import net.sourceforge.plantuml.abel.Entity;
import net.sourceforge.plantuml.abel.Link;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.core.ImageData;
import net.sourceforge.plantuml.core.UmlSource;
import net.sourceforge.plantuml.klimt.shape.TextBlock;
import net.sourceforge.plantuml.objectdiagram.AbstractClassOrObjectDiagram;
import net.sourceforge.plantuml.plasma.Quark;
import net.sourceforge.plantuml.skin.UmlDiagramType;
import net.sourceforge.plantuml.svek.image.EntityImageClass;

public class ClassDiagram extends AbstractClassOrObjectDiagram {

	public ClassDiagram(UmlSource source, Map skinParam) {
		super(source, UmlDiagramType.CLASS, skinParam);
	}

	private boolean allowMixing;

	public void setAllowMixing(boolean allowMixing) {
		this.allowMixing = allowMixing;
	}

	public boolean isAllowMixing() {
		return allowMixing;
	}

	private int useLayoutExplicit = 0;

	public void layoutNewLine() {
		useLayoutExplicit++;
		incRawLayout();
	}

	@Override
	final protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
			throws IOException {
		if (useLayoutExplicit != 0)
			return exportLayoutExplicit(os, index, fileFormatOption);

		return super.exportDiagramInternal(os, index, fileFormatOption);
	}

	final protected ImageData exportLayoutExplicit(OutputStream os, int index, FileFormatOption fileFormatOption)
			throws IOException {
		final FullLayout fullLayout = new FullLayout();
		for (int i = 0; i <= useLayoutExplicit; i++) {
			final RowLayout rawLayout = getRawLayout(i);
			fullLayout.addRowLayout(rawLayout);
		}
		return createImageBuilder(fileFormatOption).annotations(false) // Backwards compatibility - this only applies
																		// when "layout_new_line" is used
				.drawable(fullLayout).write(os);
	}

	private RowLayout getRawLayout(int raw) {
		final RowLayout rawLayout = new RowLayout();
		for (Entity leaf : this.leafs())
			if (leaf.getRawLayout() == raw)
				rawLayout.addLeaf(getEntityImageClass(leaf));

		return rawLayout;
	}

	private TextBlock getEntityImageClass(Entity entity) {
		return new EntityImageClass(entity, getSkinParam(), this);
	}

	@Override
	public String checkFinalError() {
		for (Link link : this.getLinks()) {
			final int len = link.getLength();
			if (len == 1)
				for (Link link2 : this.getLinks())
					if (link2.sameConnections(link) && link2.getLength() != 1)
						link2.setLength(1);

		}

		if (getPragma().useIntermediatePackages() == false)
			packSomePackage();

		this.applySingleStrategy();
		return super.checkFinalError();
	}

	public CommandExecutionResult checkIfPackageHierarchyIfOk(Entity entity) {
		Quark current = entity.getQuark().getParent();
		while (current.isRoot() == false) {
			if (current.getData() != null && current.getData().isGroup() == false)
				return CommandExecutionResult.error("Bad hierarchy for class " + entity.getQuark().getQualifiedName());
			current = current.getParent();
		}
		return CommandExecutionResult.ok();
	}

}