001    /****************************************************************
002     * Licensed to the Apache Software Foundation (ASF) under one   *
003     * or more contributor license agreements.  See the NOTICE file *
004     * distributed with this work for additional information        *
005     * regarding copyright ownership.  The ASF licenses this file   *
006     * to you under the Apache License, Version 2.0 (the            *
007     * "License"); you may not use this file except in compliance   *
008     * with the License.  You may obtain a copy of the License at   *
009     *                                                              *
010     *   http://www.apache.org/licenses/LICENSE-2.0                 *
011     *                                                              *
012     * Unless required by applicable law or agreed to in writing,   *
013     * software distributed under the License is distributed on an  *
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
015     * KIND, either express or implied.  See the License for the    *
016     * specific language governing permissions and limitations      *
017     * under the License.                                           *
018     ****************************************************************/
019    
020    package org.apache.james.jspf.parser;
021    
022    import org.apache.james.jspf.terms.Configuration;
023    
024    import java.util.regex.Matcher;
025    
026    /**
027     * 
028     * Provides a MatchResult view of a subset of another MatchResult
029     */
030    public class MatcherBasedConfiguration implements Configuration {
031    
032        private Matcher wrapped;
033    
034        private int start;
035    
036        private int count;
037    
038        /**
039         * @param w
040         *            Original MatchResult
041         * @param start
042         *            the position where the subresult start
043         * @param count
044         *            number of groups part of the subresult
045         */
046        public MatcherBasedConfiguration(Matcher w, int start, int count) {
047            this.wrapped = w;
048            this.count = count;
049            this.start = start;
050        }
051    
052        /**
053         * @see org.apache.james.jspf.terms.Configuration#group(int)
054         */
055        public String group(int arg0) {
056            return wrapped.group(arg0 + start);
057        }
058    
059        /**
060         * @see org.apache.james.jspf.terms.Configuration#groupCount()
061         */
062        public int groupCount() {
063            return count;
064        }
065    
066    }