net.sourceforge.plantuml.sequencediagram.graphic.Constraint Maven / Gradle / Ivy
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PlantUML is a component that allows to quickly write :
* sequence diagram,
* use case diagram,
* class diagram,
* activity diagram,
* component diagram,
* state diagram
* object diagram
/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* (C) Copyright 2009-2013, Arnaud Roques
*
* Project Info: http://plantuml.sourceforge.net
*
* 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.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* Original Author: Arnaud Roques
*
* Revision $Revision: 9786 $
*
*/
package net.sourceforge.plantuml.sequencediagram.graphic;
class Constraint {
private final Pushable p1;
private final Pushable p2;
private double value;
public Constraint(Pushable p1, Pushable p2) {
if (p1 == null || p2 == null) {
throw new IllegalArgumentException();
}
this.p1 = p1;
this.p2 = p2;
}
public final Pushable getParticipant1() {
return p1;
}
public final Pushable getParticipant2() {
return p2;
}
public final double getValue() {
return value;
}
public final void ensureValue(double newValue) {
if (newValue > value) {
this.value = newValue;
}
}
public void push(double delta) {
value += delta;
}
@Override
public String toString() {
return "Constraint " + p1 + " " + p2 + " " + value;
}
}