/*
* *************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* 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.regression.client;
import com.espertech.esper.epl.agg.aggregator.AggregationMethod;
public class MyConcatTwoAggMethod implements AggregationMethod
{
private final static char DELIMITER = ' ';
private StringBuilder builder;
private String delimiter;
public MyConcatTwoAggMethod()
{
super();
builder = new StringBuilder();
delimiter = "";
}
public void clear()
{
builder = new StringBuilder();
}
public void enter(Object value)
{
if (value != null)
{
builder.append(delimiter);
builder.append(value.toString());
delimiter = String.valueOf(DELIMITER);
}
}
public void leave(Object value)
{
if (value != null)
{
builder.delete(0, value.toString().length() + 1);
}
}
public Object getValue()
{
return builder.toString();
}
public Class getValueType()
{
return String.class;
}
}