/*
* Copyright 2010 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.core.time.impl;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Map;
import org.drools.core.common.EventFactHandle;
import org.drools.core.common.InternalWorkingMemory;
import org.drools.core.reteoo.LeftTuple;
import org.drools.core.rule.ConditionalElement;
import org.drools.core.rule.Declaration;
import org.drools.core.util.NumberUtils;
import org.drools.core.spi.Activation;
import org.drools.core.time.Trigger;
import org.kie.api.runtime.Calendars;
public class DurationTimer extends BaseTimer
implements
Timer,
Externalizable {
private long duration;
private Declaration eventFactHandle;
public DurationTimer() {
}
public DurationTimer(long duration) {
this.duration = duration;
}
public void writeExternal(ObjectOutput out) throws IOException {
out.writeLong(duration);
out.writeObject(eventFactHandle);
}
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
duration = in.readLong();
eventFactHandle = (Declaration ) in.readObject();
}
public long getDuration() {
return duration;
}
public Declaration[][] getTimerDeclarations(Map<String, Declaration> outerDeclrs) {
return new Declaration[][] { new Declaration[] { getEventFactHandleDeclaration()}, null };
}
public Trigger createTrigger(Activation item, InternalWorkingMemory wm) {
long timestamp;
if (eventFactHandle != null) {
LeftTuple leftTuple = item.getTuple();
EventFactHandle fh = (EventFactHandle) leftTuple.get(eventFactHandle);
timestamp = fh.getStartTimestamp();
} else {
timestamp = wm.getTimerService().getCurrentTime();
}
String[] calendarNames = item.getRule().getCalendars();
Calendars calendars = wm.getCalendars();
return createTrigger(timestamp, calendarNames, calendars);
}
public Trigger createTrigger(long timestamp,
LeftTuple leftTuple,
DefaultJobHandle jh,
String[] calendarNames,
Calendars calendars,
Declaration[][] declrs,
InternalWorkingMemory wm) {
if ( eventFactHandle != null ) {
EventFactHandle fh = (EventFactHandle) leftTuple.get(eventFactHandle);
timestamp = fh.getStartTimestamp();
}
return createTrigger(timestamp, calendarNames, calendars);
}
public Trigger createTrigger(long timestamp,
String[] calendarNames,
Calendars calendars) {
long offset = timestamp + duration;
if( NumberUtils.isAddOverflow( timestamp, duration, offset ) ) {
// this should not happen, but possible in some odd simulation scenarios, so creating a trigger for immediate execution instead
return new PointInTimeTrigger( timestamp,
calendarNames,
calendars );
} else {
return new PointInTimeTrigger( offset,
calendarNames,
calendars );
}
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (int) (duration ^ (duration >>> 32));
return result;
}
@Override
public boolean equals(Object obj) {
if ( this == obj ) return true;
if ( obj == null ) return false;
if ( getClass() != obj.getClass() ) return false;
DurationTimer other = (DurationTimer) obj;
if ( duration != other.duration ) return false;
return true;
}
@Override
public ConditionalElement clone() {
return new DurationTimer( duration );
}
public void setEventFactHandle(Declaration eventFactHandle) {
this.eventFactHandle = eventFactHandle;
}
public Declaration getEventFactHandleDeclaration() {
return eventFactHandle;
}
}