code: @Override
  	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;
      }
docs: /*
  (non-Javadoc)
  @see net.timewalker.ffmq4.common.message.selector.expression.SelectorNode#evaluate(javax.jms.Message)