/*
***************************************************************************************
* 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.pattern;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.StringWriter;
/**
* This class represents an 'and' operator in the evaluation tree representing an event expressions.
*/
public class EvalAndFactoryNode extends EvalNodeFactoryBase {
private static final long serialVersionUID = -7065465204506721233L;
protected EvalAndFactoryNode() {
}
public EvalNode makeEvalNode(PatternAgentInstanceContext agentInstanceContext, EvalNode parentNode) {
EvalNode[] children = EvalNodeUtil.makeEvalNodeChildren(this.getChildNodes(), agentInstanceContext, parentNode);
return new EvalAndNode(agentInstanceContext, this, children);
}
public final String toString() {
return "EvalAndFactoryNode children=" + this.getChildNodes().size();
}
public boolean isFilterChildNonQuitting() {
return false;
}
public boolean isStateful() {
return true;
}
public void toPrecedenceFreeEPL(StringWriter writer) {
PatternExpressionUtil.toPrecedenceFreeEPL(writer, "and", getChildNodes(), getPrecedence());
}
public PatternExpressionPrecedenceEnum getPrecedence() {
return PatternExpressionPrecedenceEnum.AND;
}
private static final Logger log = LoggerFactory.getLogger(EvalAndFactoryNode.class);
}