1 // ASM: a very small and fast Java bytecode manipulation framework 2 // Copyright (c) 2000-2011 INRIA, France Telecom 3 // All rights reserved. 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions 7 // are met: 8 // 1. Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // 2. Redistributions in binary form must reproduce the above copyright 11 // notice, this list of conditions and the following disclaimer in the 12 // documentation and/or other materials provided with the distribution. 13 // 3. Neither the name of the copyright holders nor the names of its 14 // contributors may be used to endorse or promote products derived from 15 // this software without specific prior written permission. 16 // 17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 21 // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 // THE POSSIBILITY OF SUCH DAMAGE. 28 package org.objectweb.asm.util; 29 30 import org.objectweb.asm.AnnotationVisitor; 31 import org.objectweb.asm.Opcodes; 32 33 /** 34 * An {@link AnnotationVisitor} that prints the annotations it visits with a {@link Printer}. 35 * 36 * @author Eric Bruneton 37 */ 38 public final class TraceAnnotationVisitor extends AnnotationVisitor { 39 40 /** The printer to convert the visited annotation into text. */ 41 private final Printer printer; 42 43 /** 44 * Constructs a new {@link TraceAnnotationVisitor}. 45 * 46 * @param printer the printer to convert the visited annotation into text. 47 */ TraceAnnotationVisitor(final Printer printer)48 public TraceAnnotationVisitor(final Printer printer) { 49 this(null, printer); 50 } 51 52 /** 53 * Constructs a new {@link TraceAnnotationVisitor}. 54 * 55 * @param annotationVisitor the annotation visitor to which to delegate calls. May be {@literal 56 * null}. 57 * @param printer the printer to convert the visited annotation into text. 58 */ TraceAnnotationVisitor(final AnnotationVisitor annotationVisitor, final Printer printer)59 public TraceAnnotationVisitor(final AnnotationVisitor annotationVisitor, final Printer printer) { 60 super(/* latest api = */ Opcodes.ASM9, annotationVisitor); 61 this.printer = printer; 62 } 63 64 @Override visit(final String name, final Object value)65 public void visit(final String name, final Object value) { 66 printer.visit(name, value); 67 super.visit(name, value); 68 } 69 70 @Override visitEnum(final String name, final String descriptor, final String value)71 public void visitEnum(final String name, final String descriptor, final String value) { 72 printer.visitEnum(name, descriptor, value); 73 super.visitEnum(name, descriptor, value); 74 } 75 76 @Override visitAnnotation(final String name, final String descriptor)77 public AnnotationVisitor visitAnnotation(final String name, final String descriptor) { 78 Printer annotationPrinter = printer.visitAnnotation(name, descriptor); 79 return new TraceAnnotationVisitor(super.visitAnnotation(name, descriptor), annotationPrinter); 80 } 81 82 @Override visitArray(final String name)83 public AnnotationVisitor visitArray(final String name) { 84 Printer arrayPrinter = printer.visitArray(name); 85 return new TraceAnnotationVisitor(super.visitArray(name), arrayPrinter); 86 } 87 88 @Override visitEnd()89 public void visitEnd() { 90 printer.visitAnnotationEnd(); 91 super.visitEnd(); 92 } 93 } 94