/**
* 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.reteoo;
import java.util.concurrent.atomic.AtomicReference;
import org.drools.common.InternalFactHandle;
import org.drools.core.util.Entry;
import org.drools.core.util.RightTupleList;
public class ConcurrentRightTuple extends RightTuple {
private RightTupleList memory;
private AtomicReference<Entry> previous;
private AtomicReference<Entry> next;
public ConcurrentRightTuple() {
}
public ConcurrentRightTuple(InternalFactHandle handle,
RightTupleSink sink) {
this.handle = handle;
this.sink = sink;
this.previous = new AtomicReference<Entry>();
this.next = new AtomicReference<Entry>();
RightTuple currentFirst = handle.getFirstRightTuple();
if ( currentFirst != null ) {
currentFirst.setHandlePrevious( this );
setHandleNext( currentFirst );
}
handle.setFirstRightTuple( this );
}
public RightTupleList getMemory() {
return memory;
}
public void setMemory(RightTupleList memory) {
this.memory = memory;
}
public Entry getPrevious() {
return previous.get();
}
public void setPrevious(Entry previous) {
this.previous.set( previous );
}
public Entry getNext() {
return next.get();
}
public void setNext(Entry next) {
this.next.set( next );
}
public int hashCode() {
return this.handle.hashCode();
}
public String toString() {
return this.handle.toString() + "\n";
}
public boolean equals(ConcurrentRightTuple other) {
// we know the object is never null and always of the type ReteTuple
if ( other == this ) {
return true;
}
// A ReteTuple is only the same if it has the same hashCode, factId and parent
if ( (other == null) || (hashCode() != other.hashCode()) ) {
return false;
}
return this.handle == other.handle;
}
public boolean equals(Object object) {
return equals( (ConcurrentRightTuple) object );
}
}