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1   package org.codehaus.plexus.components.io.filemappers;
2   
3   /*
4    * Copyright 2007 The Codehaus Foundation.
5    *
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * 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, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  
20  import javax.annotation.Nonnull;
21  
22  /**
23   * Abstract base class for deriving file mappers. It is recommended
24   * to use this class, if your implement your own file mappers, as
25   * this might allow to extend the FileMapper interface later on
26   * without loosing upwards compatibility.
27   */
28  public abstract class AbstractFileMapper implements FileMapper
29  {
30      /**
31       * Checks the input and returns it without modifications.
32       */
33      public @Nonnull String getMappedFileName( @Nonnull String pName )
34      {
35          if ( pName == null || pName.length() == 0 )
36          {
37              throw new IllegalArgumentException( "The source name must not be null." );
38          }
39          return pName;
40      }
41  }