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1   package org.apache.maven.plugin.assembly.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.io.File;
23  
24  import org.apache.maven.plugin.assembly.AssemblerConfigurationSource;
25  import org.apache.maven.plugin.assembly.utils.InterpolationConstants;
26  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;
27  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator;
28  import org.codehaus.plexus.interpolation.InterpolationException;
29  import org.codehaus.plexus.interpolation.Interpolator;
30  import org.codehaus.plexus.interpolation.PrefixAwareRecursionInterceptor;
31  
32  public class AssemblyExpressionEvaluator
33      implements ExpressionEvaluator
34  {
35      
36      private final AssemblerConfigurationSource configSource;
37      private final Interpolator interpolator;
38      private final PrefixAwareRecursionInterceptor interceptor;
39  
40      public AssemblyExpressionEvaluator( AssemblerConfigurationSource configSource )
41      {
42          this.configSource = configSource;
43          
44          interpolator = AssemblyInterpolator.buildInterpolator( configSource.getProject(), configSource );
45          interceptor = new PrefixAwareRecursionInterceptor( InterpolationConstants.PROJECT_PREFIXES, true );
46      }
47  
48      public File alignToBaseDirectory( File f )
49      {
50          String basePath = configSource.getBasedir().getAbsolutePath();
51          String path = f.getPath();
52          
53          if ( !f.isAbsolute() && !path.startsWith( basePath ) )
54          {
55              return new File( configSource.getBasedir(), path );
56          }
57          else
58          {
59              return f;
60          }
61      }
62  
63      public Object evaluate( String expression )
64          throws ExpressionEvaluationException
65      {
66          try
67          {
68              return interpolator.interpolate( expression, interceptor );
69          }
70          catch ( InterpolationException e )
71          {
72              throw new ExpressionEvaluationException( "Interpolation failed for archiver expression: " + expression, e );
73          }
74      }
75  
76  }