001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.activemq.filter;
018    
019    import javax.jms.JMSException;
020    
021    
022    /**
023     * A BooleanExpression is an expression that always
024     * produces a Boolean result.
025     *
026     * 
027     */
028    public interface BooleanExpression extends Expression {
029        
030        /**
031         * @param message
032         * @return true if the expression evaluates to Boolean.TRUE.
033         * @throws JMSException
034         */
035        boolean matches(MessageEvaluationContext message) throws JMSException;
036    
037    }