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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  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,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.maven.plugins.assembly.interpolation;
20  
21  import java.io.File;
22  
23  import org.apache.maven.plugins.assembly.AssemblerConfigurationSource;
24  import org.apache.maven.plugins.assembly.io.DefaultAssemblyReader;
25  import org.apache.maven.plugins.assembly.utils.InterpolationConstants;
26  import org.apache.maven.project.MavenProject;
27  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;
28  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator;
29  import org.codehaus.plexus.interpolation.PrefixAwareRecursionInterceptor;
30  import org.codehaus.plexus.interpolation.fixed.FixedStringSearchInterpolator;
31  import org.codehaus.plexus.interpolation.fixed.InterpolationState;
32  
33  /**
34   *
35   */
36  public class AssemblyExpressionEvaluator implements ExpressionEvaluator {
37  
38      private final AssemblerConfigurationSource configSource;
39  
40      private final FixedStringSearchInterpolator interpolator;
41  
42      private final PrefixAwareRecursionInterceptor interceptor;
43  
44      public AssemblyExpressionEvaluator(AssemblerConfigurationSource configSource) {
45          this.configSource = configSource;
46  
47          final MavenProject project = configSource.getProject();
48          final FixedStringSearchInterpolator projectInterpolator =
49                  DefaultAssemblyReader.createProjectInterpolator(project);
50          interpolator = AssemblyInterpolator.fullInterpolator(project, projectInterpolator, configSource);
51          interceptor = new PrefixAwareRecursionInterceptor(InterpolationConstants.PROJECT_PREFIXES, true);
52      }
53  
54      @Override
55      public File alignToBaseDirectory(File f) {
56          String basePath = configSource.getBasedir().getAbsolutePath();
57          String path = f.getPath();
58  
59          if (!f.isAbsolute() && !path.startsWith(basePath)) {
60              return new File(configSource.getBasedir(), path);
61          } else {
62              return f;
63          }
64      }
65  
66      @Override
67      public Object evaluate(String expression) throws ExpressionEvaluationException {
68          InterpolationState is = new InterpolationState();
69          is.setRecursionInterceptor(interceptor);
70          return interpolator.interpolate(expression, is);
71      }
72  }