1 /*
2 $Id: DumpingClassLoader.java,v 1.11 2005/03/02 08:22:42 jstrachan Exp $
3
4 Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
5
6 Redistribution and use of this software and associated documentation
7 ("Software"), with or without modification, are permitted provided
8 that the following conditions are met:
9
10 1. Redistributions of source code must retain copyright
11 statements and notices. Redistributions must also contain a
12 copy of this document.
13
14 2. Redistributions in binary form must reproduce the
15 above copyright notice, this list of conditions and the
16 following disclaimer in the documentation and/or other
17 materials provided with the distribution.
18
19 3. The name "groovy" must not be used to endorse or promote
20 products derived from this Software without prior written
21 permission of The Codehaus. For written permission,
22 please contact info@codehaus.org.
23
24 4. Products derived from this Software may not be called "groovy"
25 nor may "groovy" appear in their names without prior written
26 permission of The Codehaus. "groovy" is a registered
27 trademark of The Codehaus.
28
29 5. Due credit should be given to The Codehaus -
30 http://groovy.codehaus.org/
31
32 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
33 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
34 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
35 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
36 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43 OF THE POSSIBILITY OF SUCH DAMAGE.
44
45 */
46
47 package org.codehaus.groovy.classgen;
48
49 import groovy.lang.GroovyClassLoader;
50
51 import java.io.OutputStreamWriter;
52 import java.io.PrintWriter;
53 import java.io.StringWriter;
54
55 import org.codehaus.groovy.ast.ClassNode;
56 import org.codehaus.groovy.ast.CompileUnit;
57 import org.codehaus.groovy.control.CompilationUnit;
58 import org.codehaus.groovy.control.CompilerConfiguration;
59 import org.objectweb.asm.ClassVisitor;
60 import org.objectweb.asm.Constants;
61 import org.objectweb.asm.util.CheckClassAdapter;
62 import org.objectweb.asm.util.ASMifierClassVisitor;
63
64 /***
65 * A class loader used for debugging the bytecode generation.
66 * This will log all bytecode being loaded
67 *
68 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
69 * @version $Revision: 1.11 $
70 */
71 public class DumpingClassLoader extends GroovyClassLoader implements Constants {
72
73 protected static boolean CHECK_CLASS = false;
74 protected static boolean DUMP_CLASS = true;
75
76 public DumpingClassLoader(ClassLoader parentLoader) {
77 super(parentLoader);
78 }
79
80
81 protected class DebugCollector extends ClassCollector {
82
83 DebugCollector(GroovyClassLoader cl, CompilationUnit unit) {
84 super(cl, unit);
85 }
86
87 public void call(ClassVisitor classWriter, ClassNode classNode) {
88 // lets test out the class verifier
89 if (DUMP_CLASS) {
90 dumper.visitClass(classNode);
91 }
92
93 if (CHECK_CLASS) {
94 checker.visitClass(classNode);
95 }
96
97 super.call(classWriter, classNode);
98 }
99 }
100
101 protected ClassCollector createCollector(CompilationUnit unit) {
102 return new DebugCollector(this, unit);
103 }
104
105 protected ASMifierClassVisitor dumpVisitor = new ASMifierClassVisitor(new PrintWriter(new OutputStreamWriter(System.out)));
106 protected ASMifierClassVisitor invisibleDumpVisitor = new ASMifierClassVisitor(new PrintWriter(new StringWriter()));
107 protected CompileUnit unit = new CompileUnit(this, new CompilerConfiguration());
108 protected ClassGenerator checker =
109 new AsmClassGenerator(new GeneratorContext(unit), new CheckClassAdapter(invisibleDumpVisitor), this, null);
110 protected ClassGenerator dumper = new AsmClassGenerator(new GeneratorContext(unit), dumpVisitor, this, null);
111
112 }