/*
* This file is part of FFMQ.
*
* FFMQ is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* FFMQ is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FFMQ; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.timewalker.ffmq3.common.message.selector.expression.operator;
import javax.jms.InvalidSelectorException;
import javax.jms.JMSException;
import javax.jms.Message;
import net.timewalker.ffmq3.common.message.selector.expression.ConditionalExpression;
import net.timewalker.ffmq3.common.message.selector.expression.Identifier;
import net.timewalker.ffmq3.common.message.selector.expression.SelectorNode;
/**
* InOperator
*/
public class InOperator extends AbstractBinaryOperator implements ConditionalExpression
{
/**
* Constructor
*/
public InOperator( SelectorNode leftOperand , SelectorNode rightOperand ) throws InvalidSelectorException
{
super(leftOperand,rightOperand);
if (!(leftOperand instanceof Identifier))
throw new InvalidSelectorException("left operand of IN operator must be an identifier");
}
/*
* (non-Javadoc)
* @see net.timewalker.ffmq3.common.message.selector.expression.SelectorNode#evaluate(javax.jms.Message)
*/
public Object evaluate(Message message) throws JMSException
{
String leftValue = leftOperand.evaluateString(message);
String[] rightValue = (String[])rightOperand.evaluate(message);
if (leftValue == null)
return null; // [JMS Spec]
// Look for a match
for (int n = 0 ; n < rightValue.length ; n++)
if (rightValue[n] != null && leftValue.equals(rightValue[n]))
return Boolean.TRUE;
return Boolean.FALSE;
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
public String toString()
{
return parenthesize(leftOperand)+" IN "+parenthesize(rightOperand);
}
}