1 /* 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. Oracle designates this 7 * particular file as subject to the "Classpath" exception as provided 8 * by Oracle in the LICENSE file that accompanied this code. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 */ 24 25 /* 26 * This file is available under and governed by the GNU General Public 27 * License version 2 only, as published by the Free Software Foundation. 28 * However, the following notice accompanied the original version of this 29 * file: 30 * 31 * ASM: a very small and fast Java bytecode manipulation framework 32 * Copyright (c) 2000-2011 INRIA, France Telecom 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 3. Neither the name of the copyright holders nor the names of its 44 * contributors may be used to endorse or promote products derived from 45 * this software without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 48 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 51 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 52 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 53 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 54 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 57 * THE POSSIBILITY OF SUCH DAMAGE. 58 */ 59 package jdk.internal.org.objectweb.asm; 60 61 /** 62 * A visitor to visit a Java field. The methods of this class must be called 63 * in the following order: ( <tt>visitAnnotation</tt> | 64 * <tt>visitAttribute</tt> )* <tt>visitEnd</tt>. 65 * 66 * @author Eric Bruneton 67 */ 68 public abstract class FieldVisitor { 69 70 /** 71 * The ASM API version implemented by this visitor. The value of this field 72 * must be one of {@link Opcodes#ASM4}. 73 */ 74 protected final int api; 75 76 /** 77 * The field visitor to which this visitor must delegate method calls. May 78 * be null. 79 */ 80 protected FieldVisitor fv; 81 82 /** 83 * Constructs a new {@link FieldVisitor}. 84 * 85 * @param api the ASM API version implemented by this visitor. Must be one 86 * of {@link Opcodes#ASM4}. 87 */ 88 public FieldVisitor(final int api) { 89 this(api, null); 90 } 91 92 /** 93 * Constructs a new {@link FieldVisitor}. 94 * 95 * @param api the ASM API version implemented by this visitor. Must be one 96 * of {@link Opcodes#ASM4}. 97 * @param fv the field visitor to which this visitor must delegate method 98 * calls. May be null. 99 */ 100 public FieldVisitor(final int api, final FieldVisitor fv) { 101 /*if (api != Opcodes.ASM4) { 102 throw new IllegalArgumentException(); 103 }*/ 104 this.api = api; 105 this.fv = fv; 106 } 107 108 /** 109 * Visits an annotation of the field. 110 * 111 * @param desc the class descriptor of the annotation class. 112 * @param visible <tt>true</tt> if the annotation is visible at runtime. 113 * @return a visitor to visit the annotation values, or <tt>null</tt> if 114 * this visitor is not interested in visiting this annotation. 115 */ 116 public AnnotationVisitor visitAnnotation(String desc, boolean visible) { 117 if (fv != null) { 118 return fv.visitAnnotation(desc, visible); 119 } 120 return null; 121 } 122 123 /** 124 * Visits a non standard attribute of the field. 125 * 126 * @param attr an attribute. 127 */ 128 public void visitAttribute(Attribute attr) { 129 if (fv != null) { 130 fv.visitAttribute(attr); 131 } 132 } 133 134 /** 135 * Visits the end of the field. This method, which is the last one to be 136 * called, is used to inform the visitor that all the annotations and 137 * attributes of the field have been visited. 138 */ 139 public void visitEnd() { 140 if (fv != null) { 141 fv.visitEnd(); 142 } 143 } 144 }