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1   package org.codehaus.plexus.interpolation;
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 java.util.List;
23  
24  /**
25   * Wraps an arbitrary object with an {@link ObjectBasedValueSource} instance, then
26   * wraps that source with a {@link PrefixedValueSourceWrapper} instance, to which
27   * this class delegates all of its calls.
28   *
29   * @version $Id$
30   */
31  public class PrefixedObjectValueSource
32      extends AbstractDelegatingValueSource
33      implements QueryEnabledValueSource
34  {
35  
36      /**
37       * Wrap the specified root object, allowing the specified expression prefix.
38       */
39      @SuppressWarnings( "UnusedDeclaration" )
40      public PrefixedObjectValueSource( String prefix, Object root )
41      {
42          super( new PrefixedValueSourceWrapper( new ObjectBasedValueSource( root ), prefix ) );
43      }
44  
45      /**
46       * Wrap the specified root object, allowing the specified list of expression
47       * prefixes and setting whether the {@link PrefixedValueSourceWrapper} allows
48       * unprefixed expressions.
49       */
50      public PrefixedObjectValueSource( List<String> possiblePrefixes, Object root, boolean allowUnprefixedExpressions )
51      {
52          super( new PrefixedValueSourceWrapper( new ObjectBasedValueSource( root ), possiblePrefixes,
53                                                 allowUnprefixedExpressions ) );
54      }
55  
56      /**
57       * {@inheritDoc}
58       */
59      public String getLastExpression()
60      {
61          return ( (QueryEnabledValueSource) getDelegate() ).getLastExpression();
62      }
63  }