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.camel.processor.resequencer;
018    
019    import java.util.List;
020    
021    import org.apache.camel.Exchange;
022    import org.apache.camel.Expression;
023    
024    /**
025     * A {@link SequenceElementComparator} that compares {@link Exchange}s based on
026     * the result of an expression evaluation.
027     * 
028     * @author Martin Krasser
029     * 
030     * @version $Revision: 303 $
031     */
032    public interface ExpressionResultComparator<E extends Exchange> extends SequenceElementComparator<E> {
033    
034        /**
035         * Sets the list expressions used for comparing {@link Exchange}s.
036         * 
037         * @param expressions a list of {@link Expression} objects.
038         */
039        void setExpressions(List<Expression> expressions);
040    
041    }