/*
***************************************************************************************
* 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.expression.ops;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.expression.core.ExprEvaluator;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;
public class ExprConcatNodeEvalThreadLocal implements ExprEvaluator {
private final ExprConcatNode parent;
private final ExprEvaluator[] evaluators;
private ThreadLocal<StringBuffer> localBuffer = new ThreadLocal<StringBuffer>() {
@Override
protected StringBuffer initialValue() {
return new StringBuffer();
}
};
public ExprConcatNodeEvalThreadLocal(ExprConcatNode parent, ExprEvaluator[] evaluators) {
this.parent = parent;
this.evaluators = evaluators;
}
public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
StringBuffer buffer = localBuffer.get();
buffer.delete(0, buffer.length());
return ExprConcatNodeEvalWNew.evaluate(eventsPerStream, isNewData, context, buffer, evaluators, parent);
}
public Class getType() {
return String.class;
}
}