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.console.filter;
018    
019    import java.util.Collections;
020    import java.util.List;
021    import java.util.StringTokenizer;
022    
023    public abstract class AbstractQueryFilter implements QueryFilter {
024        protected QueryFilter next;
025    
026        /**
027         * Creates a query filter, with the next filter specified by next.
028         * @param next - the next query filter
029         */
030        protected AbstractQueryFilter(QueryFilter next) {
031            this.next = next;
032        }
033    
034        /**
035         * Performs a query given the query string
036         * @param query - query string
037         * @return objects that matches the query
038         * @throws Exception
039         */
040        public List query(String query) throws Exception {
041            // Converts string query to map query
042            StringTokenizer tokens = new StringTokenizer(query, QUERY_DELIMETER);
043            return query(Collections.list(tokens));
044        }
045    }