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PlantUML is a component that allows to quickly write diagrams from text.
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// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
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 * |      PlantUML : a free UML diagram generator
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 * (C) Copyright 2009-2024, Arnaud Roques
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package net.sourceforge.plantuml.cheneer.command;

import net.sourceforge.plantuml.abel.Entity;
import net.sourceforge.plantuml.abel.LeafType;
import net.sourceforge.plantuml.cheneer.ChenEerDiagram;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.command.SingleLineCommand2;
import net.sourceforge.plantuml.klimt.color.NoSuchColorException;
import net.sourceforge.plantuml.klimt.creole.Display;
import net.sourceforge.plantuml.plasma.Quark;
import net.sourceforge.plantuml.regex.IRegex;
import net.sourceforge.plantuml.regex.RegexConcat;
import net.sourceforge.plantuml.regex.RegexLeaf;
import net.sourceforge.plantuml.regex.RegexOptional;
import net.sourceforge.plantuml.regex.RegexOr;
import net.sourceforge.plantuml.regex.RegexResult;
import net.sourceforge.plantuml.stereo.Stereotype;
import net.sourceforge.plantuml.utils.LineLocation;

public class CommandCreateEntity extends SingleLineCommand2 {

	public CommandCreateEntity() {
		super(getRegexConcat());
	}

	protected static IRegex getRegexConcat() {
		return RegexConcat.build(CommandCreateEntity.class.getName(), RegexLeaf.start(), //
				new RegexLeaf("TYPE", "(entity|relationship)"), //
				RegexLeaf.spaceOneOrMore(), //
				new RegexOptional( // Copied from CommandCreatePackageBlock
						new RegexConcat( //
								new RegexLeaf("DISPLAY", "[%g]([^%g]+)[%g]"), //
								RegexLeaf.spaceOneOrMore(), //
								new RegexLeaf("as"), //
								RegexLeaf.spaceOneOrMore() //
						)), //
				new RegexLeaf("CODE", "([%pLN_.]+)"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("STEREO", "(<<.+>>)?"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("\\{"), //
				RegexLeaf.end());
	}

	@Override
	protected CommandExecutionResult executeArg(ChenEerDiagram diagram, LineLocation location, RegexResult arg)
			throws NoSuchColorException {
		LeafType type;
		switch (arg.get("TYPE", 0)) {
			case "entity":
				type = LeafType.CHEN_ENTITY;
				break;
			case "relationship":
				type = LeafType.CHEN_RELATIONSHIP;
				break;
			default:
				throw new IllegalStateException();
		}

		final String idShort = arg.get("CODE", 0);
		final Quark quark = diagram.quarkInContext(true, diagram.cleanId(idShort));
		String displayText = arg.get("DISPLAY", 0);
		if (displayText == null)
			displayText = quark.getName();

		final String stereo = arg.get("STEREO", 0);

		Entity entity = quark.getData();

		if (entity == null) {
			Display display = Display.getWithNewlines(displayText);
			entity = diagram.reallyCreateLeaf(quark, display, type, null);
		} else {
			if (entity.muteToType(type, null) == false)
				return CommandExecutionResult.error("Bad name");
		}

		if (stereo != null) {
			entity.setStereotype(Stereotype.build(stereo));
			entity.setStereostyle(stereo);
		}

		diagram.pushOwner(entity);

		return CommandExecutionResult.ok();
	}

}