/*
* 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.base;
import java.util.ArrayList;
import java.util.List;
import org.drools.core.common.InternalFactHandle;
import org.drools.core.common.InternalWorkingMemory;
import org.drools.core.definitions.rule.impl.RuleImpl;
import org.drools.core.reteoo.LeftTuple;
import org.drools.core.reteoo.QueryTerminalNode;
import org.drools.core.spi.PropagationContext;
public class NonCloningQueryViewListener
implements
InternalViewChangedEventListener {
private List<Object> results;
public NonCloningQueryViewListener() {
this.results = new ArrayList<Object>( 250 );
}
public List<? extends Object> getResults() {
return this.results;
}
public void rowAdded(final RuleImpl rule,
final LeftTuple tuple,
final PropagationContext context,
final InternalWorkingMemory workingMemory) {
InternalFactHandle[] handles = new InternalFactHandle[tuple.getIndex() + 1];
LeftTuple entry = tuple;
// Add all the FactHandles except the root DroolQuery object
while ( entry.getIndex() > 0 ) {
InternalFactHandle handle = entry.getLastHandle();
if ( handle != null ) {
// can be null for eval, not and exists that have no right input
handles[entry.getIndex()] = handle;
}
entry = entry.getParent();
}
InternalFactHandle handle = entry.getLastHandle();
handles[entry.getIndex()] = handle;
QueryTerminalNode node = ( QueryTerminalNode ) tuple.getLeftTupleSink();
this.results.add( new QueryRowWithSubruleIndex(handles, node.getSubruleIndex()) );
}
public void rowRemoved(final RuleImpl rule,
final LeftTuple tuple,
final PropagationContext context,
final InternalWorkingMemory workingMemory) {
}
public void rowUpdated(final RuleImpl rule,
final LeftTuple tuple,
final PropagationContext context,
final InternalWorkingMemory workingMemory) {
}
}