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1   package org.apache.maven.resolver.internal.ant.types;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import org.apache.tools.ant.PropertyHelper;
23  
24  /**
25   */
26  @SuppressWarnings( "deprecation" )
27  class PomPropertyHelper
28      extends PropertyHelper
29  {
30  
31      private final ModelValueExtractor extractor;
32  
33      public static void register( ModelValueExtractor extractor, PropertyHelper propertyHelper )
34      {
35          PomPropertyHelper helper = new PomPropertyHelper( extractor );
36          helper.setNext( propertyHelper.getNext() );
37          propertyHelper.setNext( helper );
38      }
39  
40      PomPropertyHelper( ModelValueExtractor extractor )
41      {
42          if ( extractor == null )
43          {
44              throw new IllegalArgumentException( "no model value exractor specified" );
45          }
46          this.extractor = extractor;
47          setProject( extractor.getProject() );
48      }
49  
50      @Override
51      public Object getPropertyHook( String ns, String name, boolean user )
52      {
53          Object value = extractor.getValue( name );
54          if ( value != null )
55          {
56              return value;
57          }
58          else if ( extractor.isApplicable( name ) )
59          {
60              return null;
61          }
62          return super.getPropertyHook( ns, name, user );
63      }
64  
65  }