org.drools.core.common.TerminalNodeIterator Maven / Gradle / Ivy
/*
* Copyright 2015 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.
*
* 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.common;
import java.util.Map;
import org.drools.core.impl.InternalKnowledgeBase;
import org.drools.core.util.Iterator;
import org.drools.core.impl.KnowledgeBaseImpl;
import org.kie.api.KieBase;
public class TerminalNodeIterator
implements
Iterator {
private InternalKnowledgeBase kBase;
private BaseNode[][] nodes;
private int i = 0;
private int j = 0;
TerminalNodeIterator() {
}
private TerminalNodeIterator(KieBase kBase) {
this.kBase = (InternalKnowledgeBase)kBase;
Map rules = this.kBase.getReteooBuilder().getTerminalNodes();
nodes = rules.values().toArray( new BaseNode[rules.size()][] );
}
public static Iterator iterator(KieBase kBase) {
return new TerminalNodeIterator(kBase);
}
public Object next() {
if ( i >= nodes.length ) {
return null;
}
BaseNode node = nodes[i][j];
// now set to the next node
j++;
if ( j >= nodes[i].length ) {
i++;
j = 0;
}
return node;
}
}