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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;
/**
* Class specifying a wakeup when a specific number of milliseconds
* have elapsed.
*
*/
public final class WakeupOnElapsedTime extends WakeupCriterion {
long wait;
/**
* This represents the triggered time
*/
long triggeredTime;
/**
* Constructs a new WakeupOnElapsedTime criterion.
* @param milliseconds the number of milliseconds to the wakeup. A value
* of zero or less will cause an IllegalArgumentException to be thrown.
*/
public WakeupOnElapsedTime(long milliseconds) {
if(milliseconds <= 0L)
throw new IllegalArgumentException(J3dI18N.getString("WakeupOnElapsedTime0"));
this.wait = milliseconds;
}
/**
* Retrieve the WakeupCriterion's elapsed time value that was used when
* constructing this object.
* @return the elapsed time specified when constructing this object
*/
public long getElapsedFrameTime(){
return wait;
}
/**
* This is a callback from BehaviorStructure. It is
* used to add wakeupCondition to behavior structure.
*/
@Override
void addBehaviorCondition(BehaviorStructure bs) {
this.triggeredTime = wait + J3dClock.currentTimeMillis();
behav.wakeupArray[BehaviorRetained.WAKEUP_TIME_INDEX]++;
behav.wakeupMask |= BehaviorRetained.WAKEUP_TIME;
VirtualUniverse.mc.timerThread.add(this);
}
/**
* This is a callback from BehaviorStructure. It is
* used to remove wakeupCondition from behavior structure.
*/
@Override
void removeBehaviorCondition(BehaviorStructure bs) {
behav.wakeupArray[BehaviorRetained.WAKEUP_TIME_INDEX]--;
if (behav.wakeupArray[BehaviorRetained.WAKEUP_TIME_INDEX] == 0) {
behav.wakeupMask &= ~BehaviorRetained.WAKEUP_TIME;
}
VirtualUniverse.mc.timerThread.remove(this);
}
/**
* This is invoked when Behavior processStimulus can't schedule
* to run because behav.active = false. In this case we must
* reinsert the wakeupOnElapseTime condition back to the
* TimerThread wakeup heap
*/
@Override
void reInsertElapseTimeCond() {
super.reInsertElapseTimeCond();
this.triggeredTime = wait + J3dClock.currentTimeMillis();
VirtualUniverse.mc.timerThread.add(this);
}
/**
* Perform task in addBehaviorCondition() that has to be
* set every time the condition met.
*/
@Override
void resetBehaviorCondition(BehaviorStructure bs) {
this.triggeredTime = wait + J3dClock.currentTimeMillis();
VirtualUniverse.mc.timerThread.add(this);
}
}
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