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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 org.apache.maven.plugin.assembly.AssemblerConfigurationSource;
23  import org.apache.maven.plugin.assembly.io.DefaultAssemblyReader;
24  import org.apache.maven.plugin.assembly.utils.InterpolationConstants;
25  import org.apache.maven.project.MavenProject;
26  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;
27  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator;
28  import org.codehaus.plexus.interpolation.PrefixAwareRecursionInterceptor;
29  import org.codehaus.plexus.interpolation.fixed.FixedStringSearchInterpolator;
30  import org.codehaus.plexus.interpolation.fixed.InterpolationState;
31  
32  import java.io.File;
33  
34  /**
35   * 
36   */
37  public class AssemblyExpressionEvaluator
38      implements ExpressionEvaluator
39  {
40  
41      private final AssemblerConfigurationSource configSource;
42  
43      private final FixedStringSearchInterpolator interpolator;
44  
45      private final PrefixAwareRecursionInterceptor interceptor;
46  
47      public AssemblyExpressionEvaluator( AssemblerConfigurationSource configSource )
48      {
49          this.configSource = configSource;
50  
51          final MavenProject project = configSource.getProject();
52          final FixedStringSearchInterpolator projectInterpolator =
53              DefaultAssemblyReader.createProjectInterpolator( project );
54          interpolator = AssemblyInterpolator.fullInterpolator( project, projectInterpolator, configSource );
55          interceptor = new PrefixAwareRecursionInterceptor( InterpolationConstants.PROJECT_PREFIXES, true );
56      }
57  
58      public File alignToBaseDirectory( File f )
59      {
60          String basePath = configSource.getBasedir().getAbsolutePath();
61          String path = f.getPath();
62  
63          if ( !f.isAbsolute() && !path.startsWith( basePath ) )
64          {
65              return new File( configSource.getBasedir(), path );
66          }
67          else
68          {
69              return f;
70          }
71      }
72  
73      public Object evaluate( String expression )
74          throws ExpressionEvaluationException
75      {
76          InterpolationState is = new InterpolationState();
77          is.setRecursionInterceptor( interceptor );
78          return interpolator.interpolate( expression, is );
79      }
80  
81  }