01: /***
02: * ASM Guide
03: * Copyright (c) 2007 Eric Bruneton
04: * All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions
08: * are met:
09: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: * 2. Redistributions in binary form must reproduce the above copyright
12: * notice, this list of conditions and the following disclaimer in the
13: * documentation and/or other materials provided with the distribution.
14: * 3. Neither the name of the copyright holders nor the names of its
15: * contributors may be used to endorse or promote products derived from
16: * this software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28: * THE POSSIBILITY OF SUCH DAMAGE.
29: */package ch2.sec2;
30:
31: import static org.objectweb.asm.Opcodes.ACC_ABSTRACT;
32: import static org.objectweb.asm.Opcodes.ACC_FINAL;
33: import static org.objectweb.asm.Opcodes.ACC_INTERFACE;
34: import static org.objectweb.asm.Opcodes.ACC_PUBLIC;
35: import static org.objectweb.asm.Opcodes.ACC_STATIC;
36: import static org.objectweb.asm.Opcodes.V1_5;
37:
38: import java.io.PrintWriter;
39:
40: import org.objectweb.asm.ClassWriter;
41: import org.objectweb.asm.util.CheckClassAdapter;
42: import org.objectweb.asm.util.TraceClassVisitor;
43:
44: /**
45: * ASM Guide example class.
46: *
47: * @author Eric Bruneton
48: */
49: public class ComparableGenerator {
50:
51: public byte[] generate(PrintWriter printWriter) {
52: ClassWriter cw = new ClassWriter(0);
53: TraceClassVisitor tcv = new TraceClassVisitor(cw, printWriter);
54: CheckClassAdapter cv = new CheckClassAdapter(tcv);
55: cv.visit(V1_5, ACC_PUBLIC + ACC_ABSTRACT + ACC_INTERFACE,
56: "pkg/Comparable", null, "java/lang/Object",
57: new String[] { "pkg/Mesurable" });
58: cv.visitSource("Comparable.java", null);
59: cv.visitField(ACC_PUBLIC + ACC_FINAL + ACC_STATIC, "LESS", "I",
60: null, new Integer(-1)).visitEnd();
61: cv.visitField(ACC_PUBLIC + ACC_FINAL + ACC_STATIC, "EQUAL",
62: "I", null, new Integer(0)).visitEnd();
63: cv.visitField(ACC_PUBLIC + ACC_FINAL + ACC_STATIC, "GREATER",
64: "I", null, new Integer(1)).visitEnd();
65: cv.visitMethod(ACC_PUBLIC + ACC_ABSTRACT, "compareTo",
66: "(Ljava/lang/Object;)I", null, null).visitEnd();
67: cv.visitEnd();
68: byte[] b = cw.toByteArray();
69: return b;
70: }
71: }
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