1 package org.apache.maven.plugin.invoker;
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 import java.io.IOException;
24 import java.io.PrintStream;
25 import java.util.Iterator;
26 import java.util.List;
27 import java.util.Map;
28
29 import bsh.EvalError;
30 import bsh.Interpreter;
31 import bsh.TargetError;
32
33 /**
34 * Provides a facade to evaluate BeanShell scripts.
35 *
36 * @author Benjamin Bentmann
37 * @version $Id: BeanShellScriptInterpreter.java 684549 2008-08-10 16:30:43Z bentmann $
38 */
39 class BeanShellScriptInterpreter
40 implements ScriptInterpreter
41 {
42
43 /**
44 * {@inheritDoc}
45 */
46 public Object evaluateScript( String script, List classPath, Map globalVariables, PrintStream scriptOutput )
47 throws ScriptEvaluationException
48 {
49 PrintStream origOut = System.out;
50 PrintStream origErr = System.err;
51
52 try
53 {
54 Interpreter engine = new Interpreter();
55
56 if ( scriptOutput != null )
57 {
58 System.setErr( scriptOutput );
59 System.setOut( scriptOutput );
60 engine.setErr( scriptOutput );
61 engine.setOut( scriptOutput );
62 }
63
64 if ( classPath != null && !classPath.isEmpty() )
65 {
66 for ( Iterator it = classPath.iterator(); it.hasNext(); )
67 {
68 String path = (String) it.next();
69 try
70 {
71 engine.getClassManager().addClassPath( new File( path ).toURI().toURL() );
72 }
73 catch ( IOException e )
74 {
75 throw new RuntimeException( "bad class path: " + path, e );
76 }
77 }
78 }
79
80 if ( globalVariables != null )
81 {
82 for ( Iterator it = globalVariables.keySet().iterator(); it.hasNext(); )
83 {
84 String variable = (String) it.next();
85 Object value = globalVariables.get( variable );
86 try
87 {
88 engine.set( variable, value );
89 }
90 catch ( EvalError e )
91 {
92 throw new RuntimeException( e );
93 }
94 }
95 }
96
97 try
98 {
99 return engine.eval( script );
100 }
101 catch ( TargetError e )
102 {
103 throw new ScriptEvaluationException( e.getTarget() );
104 }
105 catch ( Exception e )
106 {
107 throw new ScriptEvaluationException( e );
108 }
109 }
110 finally
111 {
112 System.setErr( origErr );
113 System.setOut( origOut );
114 }
115 }
116
117 }