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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.maven.internal.impl;
20  
21  import java.util.AbstractList;
22  import java.util.List;
23  import java.util.function.Function;
24  
25  public class MappedList<U, V> extends AbstractList<U> {
26      private final List<V> list;
27      private final Function<V, U> mapper;
28  
29      public MappedList(List<V> list, Function<V, U> mapper) {
30          this.list = list;
31          this.mapper = mapper;
32      }
33  
34      @Override
35      public U get(int index) {
36          return mapper.apply(list.get(index));
37      }
38  
39      @Override
40      public int size() {
41          return list.size();
42      }
43  }