001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    package org.apache.commons.jci.classes;
019    
020    import org.objectweb.asm.ClassWriter;
021    import org.objectweb.asm.Label;
022    import org.objectweb.asm.MethodVisitor;
023    import org.objectweb.asm.Opcodes;
024    
025    
026    public class ExtendedDump implements Opcodes {
027    
028        public static byte[] dump() throws Exception {
029    
030            ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
031            MethodVisitor mv;
032    
033            cw.visit(V1_4, ACC_PUBLIC + ACC_SUPER, "jci/Extended", null, "jci/Simple", null);
034    
035            cw.visitSource("Extended.java", null);
036    
037            {
038                mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
039                mv.visitCode();
040                Label l0 = new Label();
041                mv.visitLabel(l0);
042                mv.visitLineNumber(3, l0);
043                mv.visitVarInsn(ALOAD, 0);
044                mv.visitMethodInsn(INVOKESPECIAL, "jci/Simple", "<init>", "()V");
045                mv.visitInsn(RETURN);
046                Label l1 = new Label();
047                mv.visitLabel(l1);
048                mv.visitLocalVariable("this", "Ljci/Extended;", null, l0, l1, 0);
049                mv.visitMaxs(1, 1);
050                mv.visitEnd();
051            }
052            {
053                mv = cw.visitMethod(ACC_PUBLIC, "toString", "()Ljava/lang/String;", null, null);
054                mv.visitCode();
055                Label l0 = new Label();
056                mv.visitLabel(l0);
057                mv.visitLineNumber(6, l0);
058                mv.visitTypeInsn(NEW, "java/lang/StringBuffer");
059                mv.visitInsn(DUP);
060                mv.visitLdcInsn("Extended:");
061                mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuffer", "<init>", "(Ljava/lang/String;)V");
062                mv.visitVarInsn(ALOAD, 0);
063                mv.visitMethodInsn(INVOKESPECIAL, "jci/Simple", "toString", "()Ljava/lang/String;");
064                mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuffer", "append", "(Ljava/lang/String;)Ljava/lang/StringBuffer;");
065                mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuffer", "toString", "()Ljava/lang/String;");
066                mv.visitInsn(ARETURN);
067                Label l1 = new Label();
068                mv.visitLabel(l1);
069                mv.visitLocalVariable("this", "Ljci/Extended;", null, l0, l1, 0);
070                mv.visitMaxs(3, 1);
071                mv.visitEnd();
072            }
073            cw.visitEnd();
074    
075            return cw.toByteArray();
076        }
077    }