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/*
* Copyright 2005 Red Hat, Inc. and/or its affiliates.
*
* 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.reteoo;
import org.drools.core.common.BetaConstraints;
import org.drools.core.common.InternalFactHandle;
import org.drools.core.common.InternalWorkingMemory;
import org.drools.core.reteoo.builder.BuildContext;
import org.drools.core.spi.PropagationContext;
public class JoinNode extends BetaNode {
private static final long serialVersionUID = 510l;
public JoinNode() {
}
public JoinNode(final int id,
final LeftTupleSource leftInput,
final ObjectSource rightInput,
final BetaConstraints binder,
final BuildContext context) {
super( id,
leftInput,
rightInput,
binder,
context );
this.tupleMemoryEnabled = context.isTupleMemoryEnabled();
}
public short getType() {
return NodeTypeEnums.JoinNode;
}
public String toString() {
return "[JoinNode(" + this.getId() + ") - " + getObjectTypeNode().getObjectType() + "]";
}
public LeftTuple createPeer(LeftTuple original) {
JoinNodeLeftTuple peer = new JoinNodeLeftTuple();
peer.initPeer( (BaseLeftTuple) original, this );
original.setPeer( peer );
return peer;
}
public LeftTuple createLeftTuple(InternalFactHandle factHandle,
Sink sink,
boolean leftTupleMemoryEnabled) {
return new JoinNodeLeftTuple(factHandle, sink, leftTupleMemoryEnabled );
}
public LeftTuple createLeftTuple(final InternalFactHandle factHandle,
final LeftTuple leftTuple,
final Sink sink) {
return new JoinNodeLeftTuple(factHandle,leftTuple, sink );
}
public LeftTuple createLeftTuple(LeftTuple leftTuple,
Sink sink,
PropagationContext pctx,
boolean leftTupleMemoryEnabled) {
return new JoinNodeLeftTuple(leftTuple,sink, pctx, leftTupleMemoryEnabled );
}
public LeftTuple createLeftTuple(LeftTuple leftTuple,
RightTuple rightTuple,
Sink sink) {
return new JoinNodeLeftTuple(leftTuple, rightTuple, sink );
}
public LeftTuple createLeftTuple(LeftTuple leftTuple,
RightTuple rightTuple,
LeftTuple currentLeftChild,
LeftTuple currentRightChild,
Sink sink,
boolean leftTupleMemoryEnabled) {
return new JoinNodeLeftTuple(leftTuple, rightTuple, currentLeftChild, currentRightChild, sink, leftTupleMemoryEnabled );
}
public void retractRightTuple( final RightTuple rightTuple,
final PropagationContext pctx,
final InternalWorkingMemory wm ) {
final BetaMemory memory = (BetaMemory) wm.getNodeMemory( this );
rightTuple.setPropagationContext( pctx );
doDeleteRightTuple( rightTuple,
wm,
memory );
}
@Override
public void modifyRightTuple(RightTuple rightTuple, PropagationContext context, InternalWorkingMemory workingMemory) {
throw new UnsupportedOperationException();
}
@Override
public boolean doRemove(RuleRemovalContext context, ReteooBuilder builder, InternalWorkingMemory[] workingMemories) {
if ( !isInUse() ) {
getLeftTupleSource().removeTupleSink( this );
getRightInput().removeObjectSink( this );
return true;
}
return false;
}
}
