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/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* (C) Copyright 2009-2017, Arnaud Roques
*
* Project Info: http://plantuml.com
*
* If you like this project or if you find it useful, you can support us at:
*
* http://plantuml.com/patreon (only 1$ per month!)
* http://plantuml.com/paypal
*
* This file is part of PlantUML.
*
* PlantUML is free software; you can redistribute it and/or modify it
* under the terms of the GNU 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 General Public
* License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
*
* Original Author: Arnaud Roques
*
*
*/
package net.sourceforge.plantuml.sequencediagram.command;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.command.SingleLineCommand2;
import net.sourceforge.plantuml.command.regex.RegexConcat;
import net.sourceforge.plantuml.command.regex.RegexLeaf;
import net.sourceforge.plantuml.command.regex.RegexResult;
import net.sourceforge.plantuml.cucadiagram.Display;
import net.sourceforge.plantuml.sequencediagram.EventWithDeactivate;
import net.sourceforge.plantuml.sequencediagram.LifeEventType;
import net.sourceforge.plantuml.sequencediagram.Message;
import net.sourceforge.plantuml.sequencediagram.SequenceDiagram;
import net.sourceforge.plantuml.skin.ArrowBody;
import net.sourceforge.plantuml.skin.ArrowConfiguration;
public class CommandReturn extends SingleLineCommand2<SequenceDiagram> {
public CommandReturn() {
super(getRegexConcat());
}
private static RegexConcat getRegexConcat() {
return new RegexConcat(new RegexLeaf("^"), //
new RegexLeaf("PARALLEL", "(&%s*)?"), //
new RegexLeaf("[%s]*"), //
new RegexLeaf("return[%s]*"), //
new RegexLeaf("MESSAGE", "(.*)"), //
new RegexLeaf("$"));
}
@Override
protected CommandExecutionResult executeArg(SequenceDiagram sequenceDiagram, RegexResult arg) {
Message message1 = sequenceDiagram.getActivatingMessage();
boolean doDeactivation = true;
if (message1 == null) {
final EventWithDeactivate last = sequenceDiagram.getLastEventWithDeactivate();
if (last instanceof Message == false) {
return CommandExecutionResult.error("Nowhere to return to.");
}
message1 = (Message) last;
doDeactivation = false;
}
final ArrowConfiguration arrow = message1.getArrowConfiguration().withBody(ArrowBody.DOTTED);
final Display display = Display.getWithNewlines(arg.get("MESSAGE", 0));
final Message message2 = new Message(message1.getParticipant2(), message1.getParticipant1(), display, arrow,
sequenceDiagram.getNextMessageNumber());
final boolean parallel = arg.get("PARALLEL", 0) != null;
if (parallel) {
message2.goParallel();
}
sequenceDiagram.addMessage(message2);
if (doDeactivation) {
final String error = sequenceDiagram.activate(message1.getParticipant2(), LifeEventType.DEACTIVATE, null);
if (error != null) {
return CommandExecutionResult.error(error);
}
}
return CommandExecutionResult.ok();
}
}
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