001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.transforms;
014
015import java.util.*;
016import java.util.regex.*;
017
018import org.apache.juneau.*;
019import org.apache.juneau.transform.*;
020
021/**
022 * Transforms {@link MatchResult MatchResults} to {@code List} objects.
023 *
024 * <p>
025 * Entries in the list represent matched groups in a regular expression.
026 */
027public class MatchResultSwap extends PojoSwap<MatchResult,List<String>> {
028
029   /**
030    * Converts the specified {@link Enumeration} to a {@link List}.
031    */
032   @Override /* PojoSwap */
033   public List<String> swap(BeanSession session, MatchResult o) {
034      List<String> l = new ArrayList<>(o.groupCount());
035      for (int i = 0; i <= o.groupCount(); i++)
036         l.add(o.group(i));
037      return l;
038   }
039}