/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
***************************************************************************************
*/
package com.espertech.esper.epl.join.assemble;
import com.espertech.esper.util.IndentWriter;
/**
* Assembly factory node for an event stream that is a root with a two or more child nodes below it.
*/
public class RootCartProdAssemblyNodeFactory extends BaseAssemblyNodeFactory {
private final int[] childStreamIndex; // maintain mapping of stream number to index in array
private boolean allSubStreamsOptional;
/**
* Ctor.
*
* @param streamNum - is the stream number
* @param numStreams - is the number of streams
* @param allSubStreamsOptional - true if all substreams are optional and none are required
*/
public RootCartProdAssemblyNodeFactory(int streamNum, int numStreams, boolean allSubStreamsOptional) {
super(streamNum, numStreams);
this.allSubStreamsOptional = allSubStreamsOptional;
childStreamIndex = new int[numStreams];
}
@Override
public void addChild(BaseAssemblyNodeFactory childNode) {
childStreamIndex[childNode.getStreamNum()] = childNodes.size();
super.addChild(childNode);
}
public void print(IndentWriter indentWriter) {
indentWriter.println("RootCartProdAssemblyNode streamNum=" + streamNum);
}
public BaseAssemblyNode makeAssemblerUnassociated() {
return new RootCartProdAssemblyNode(streamNum, numStreams, allSubStreamsOptional, childStreamIndex);
}
}