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/*
* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
package javax.media.j3d;
/**
* An abstract class specifying a singleton wakeup Criterion. This
* class consists of several subclasses, each of which specifies one
* particular wakeup criterion, that criterion's associated arguments
* (if any), and either a flag that indicates whether this criterion
* caused a Behavior object to awaken or a return field containing the
* information that caused the Behavior object to awaken.
* <p>
* Note that a unique WakeupCriterion object must be used with each instance
* of a Behavior. Sharing wakeup criteria among different instances of
* a Behavior is illegal. Similarly, a unique WakeupCriterion object
* must be used for each individual element in the set of arrays used
* to construct WakeupOr, WakeupAnd, WakeupOrOfAnds, and
* WakeupAndOfOrs objects.
*/
public abstract class WakeupCriterion extends WakeupCondition {
/**
* Flag specifying whether this criterion triggered a wakeup
*/
boolean triggered;
/**
* Returns true if this criterion triggered the wakeup.
* @return true if this criterion triggered the wakeup.
*/
public boolean hasTriggered(){
return this.triggered;
}
/**
* Set the Criterion's trigger flag to true.
*/
void setTriggered(){
this.triggered = true;
if (this.parent == null) {
super.setConditionMet(id, Boolean.TRUE);
} else {
parent.setConditionMet(id, Boolean.TRUE);
}
}
/**
* Initialize And/Or tree and add criterion to the BehaviourStructure.
*
*/
@Override
void buildTree(WakeupCondition parent, int id, BehaviorRetained b) {
super.buildTree(parent, id, b);
triggered = false;
addBehaviorCondition(b.universe.behaviorStructure);
}
/**
* This goes through the AndOr tree to remove the various criterion from the
* BehaviorStructure.
* We can't use behav.universe.behaviorStructure since behav
* may reassign to another universe at this time.
*
*/
@Override
void cleanTree(BehaviorStructure bs){
conditionMet = false;
removeBehaviorCondition(bs);
};
/**
* This goes through the AndOr tree to reset various criterion.
*/
@Override
void resetTree() {
conditionMet = false;
triggered = false;
resetBehaviorCondition(behav.universe.behaviorStructure);
}
/**
* This is a callback from BehaviorStructure. It is
* used to add wakeupCondition to behavior structure.
*/
abstract void addBehaviorCondition(BehaviorStructure bs);
/**
* This is a callback from BehaviorStructure. It is
* used to remove wakeupCondition from behavior structure.
*/
abstract void removeBehaviorCondition(BehaviorStructure bs);
/**
* It is used reset wakeupCondition when it is reused.
*/
abstract void resetBehaviorCondition(BehaviorStructure bs);
}
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