1 package org.apache.maven.artifact.ant;
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.BuildException;
23 import org.apache.tools.ant.PropertyHelper;
24 import org.codehaus.plexus.util.introspection.ReflectionValueExtractor;
25
26 /**
27 * The property intercepter that handles the calls for "pom." properties in Ant 1.6 - 1.7.1
28 */
29 class POMPropertyHelper
30 extends PropertyHelper
31 {
32
33 protected final Pom pom;
34
35 POMPropertyHelper( Pom pom )
36 {
37 this.pom = pom;
38 }
39
40 /**
41 * The method that gets called by Ant 1.6 - 1.7.1 with every request of property
42 */
43 public Object getPropertyHook( String ns, String name, boolean user )
44 {
45 String prefix = this.pom.antId + ".";
46
47 if ( !name.startsWith( prefix ) )
48 {
49 // pass on to next interceptor
50 return super.getPropertyHook( ns, name, user );
51 }
52 try
53 {
54 // else handle the property resolution
55 String expression = name.substring( prefix.length() );
56 return getPOMValue( "project." + expression );
57 }
58 catch ( Exception ex )
59 {
60 ex.printStackTrace();
61 return null;
62 }
63 }
64
65 private static final String PROPERTIES_PREFIX = "project.properties.";
66
67 protected Object getPOMValue( String expression )
68 {
69 Object value = null;
70
71 try
72 {
73 if ( expression.startsWith( PROPERTIES_PREFIX ) )
74 {
75 expression = expression.substring( PROPERTIES_PREFIX.length() );
76 value = pom.getMavenProject().getProperties().get( expression );
77 }
78 else
79 {
80 value = ReflectionValueExtractor.evaluate( expression, pom.getMavenProject() );
81 }
82 }
83 catch ( Exception e )
84 {
85 throw new BuildException( "Error extracting expression from POM", e );
86 }
87
88 return value;
89 }
90
91 }