CommandExoArrowLeft.java

/* ========================================================================
 * PlantUML : a free UML diagram generator
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 * (C) Copyright 2009-2024, Arnaud Roques
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package net.sourceforge.plantuml.sequencediagram.command;

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.sequencediagram.MessageExoType;
import net.sourceforge.plantuml.url.UrlBuilder;

public class CommandExoArrowLeft extends CommandExoArrowAny {

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

	static IRegex getRegexConcat() {
		return RegexConcat.build(CommandExoArrowLeft.class.getName(), RegexLeaf.start(), //
				new RegexLeaf(1, "PARALLEL", "(&[%s]*)?"), //
				new RegexLeaf(2, "ANCHOR", CommandArrow.ANCHOR), //
				new RegexLeaf(1, ARROW_SUPPCIRCLE2, "([?\\[\\]][ox]?)?"), //
				new RegexOr( //
						new RegexConcat( //
								new RegexLeaf(1, "ARROW_BOTHDRESSING", "(<<?|//?|\\\\\\\\?)?"), //
								new RegexLeaf(1, "ARROW_BODYA1", "(-+)"), //
								new RegexLeaf(1, "ARROW_STYLE1", CommandArrow.getColorOrStylePattern()), //
								new RegexLeaf(1, "ARROW_BODYB1", "(-*)"), //
								new RegexLeaf(1, "ARROW_DRESSING1", "(>>?|//?|\\\\\\\\?)")), //
						new RegexConcat( //
								new RegexLeaf(1, "ARROW_DRESSING2", "(<<?|//?|\\\\\\\\?)"), //
								new RegexLeaf(1, "ARROW_BODYB2", "(-*)"), //
								new RegexLeaf(1, "ARROW_STYLE2", CommandArrow.getColorOrStylePattern()), //
								new RegexLeaf(1, "ARROW_BODYA2", "(-+)"))), //
				new RegexLeaf(1, ARROW_SUPPCIRCLE1, "([ox][%s]+)?"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf(1, "PARTICIPANT", "([%pLN_.@]+|[%g][^%g]+[%g])"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf(1, "ACTIVATION", "(?:([+*!-]+)?)"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf(1, "LIFECOLOR", "(?:(#\\w+)?)"), //
				RegexLeaf.spaceZeroOrMore(), //
				UrlBuilder.OPTIONAL, //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexOptional( //
						new RegexConcat( //
								new RegexLeaf(":"), //
								RegexLeaf.spaceZeroOrMore(), //
								new RegexLeaf(1, "LABEL", "(.*)") //
						)), RegexLeaf.end());
	}

	@Override
	MessageExoType getMessageExoType(RegexResult arg2) {
		final String start = arg2.get(ARROW_SUPPCIRCLE2, 0);
		final String dressing1 = arg2.get("ARROW_DRESSING1", 0);
		final String dressing2 = arg2.get("ARROW_DRESSING2", 0);
		if (start != null && start.contains("]")) {
			if (dressing1 != null)
				return MessageExoType.FROM_RIGHT;

			if (dressing2 != null)
				return MessageExoType.TO_RIGHT;

			throw new IllegalArgumentException();
		}
		if (dressing1 != null)
			return MessageExoType.FROM_LEFT;

		if (dressing2 != null)
			return MessageExoType.TO_LEFT;

		throw new IllegalArgumentException();
	}

}