rev 47452 : imported patch jdk-new-asmv6.patch

   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 in
  63  * the following order: ( <tt>visitAnnotation</tt> |
  64  * <tt>visitTypeAnnotation</tt> | <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}, {@link Opcodes#ASM5} or {@link Opcodes#ASM6}.
  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
  86      *            the ASM API version implemented by this visitor. Must be one
  87      *            of {@link Opcodes#ASM4}, {@link Opcodes#ASM5} or {@link Opcodes#ASM6}.
  88      */
  89     public FieldVisitor(final int api) {
  90         this(api, null);
  91     }
  92 
  93     /**
  94      * Constructs a new {@link FieldVisitor}.
  95      *
  96      * @param api
  97      *            the ASM API version implemented by this visitor. Must be one
  98      *            of {@link Opcodes#ASM4}, {@link Opcodes#ASM5} or {@link Opcodes#ASM6}.
  99      * @param fv
 100      *            the field visitor to which this visitor must delegate method
 101      *            calls. May be null.
 102      */
 103     public FieldVisitor(final int api, final FieldVisitor fv) {
 104         if (api < Opcodes.ASM4 || api > Opcodes.ASM6) {
 105             throw new IllegalArgumentException();
 106         }
 107         this.api = api;
 108         this.fv = fv;
 109     }
 110 
 111     /**
 112      * Visits an annotation of the field.
 113      *
 114      * @param desc
 115      *            the class descriptor of the annotation class.
 116      * @param visible
 117      *            <tt>true</tt> if the annotation is visible at runtime.
 118      * @return a visitor to visit the annotation values, or <tt>null</tt> if
 119      *         this visitor is not interested in visiting this annotation.
 120      */
 121     public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
 122         if (fv != null) {
 123             return fv.visitAnnotation(desc, visible);
 124         }
 125         return null;
 126     }
 127 
 128     /**
 129      * Visits an annotation on the type of the field.
 130      *
 131      * @param typeRef
 132      *            a reference to the annotated type. The sort of this type
 133      *            reference must be {@link TypeReference#FIELD FIELD}. See
 134      *            {@link TypeReference}.
 135      * @param typePath
 136      *            the path to the annotated type argument, wildcard bound, array
 137      *            element type, or static inner type within 'typeRef'. May be
 138      *            <tt>null</tt> if the annotation targets 'typeRef' as a whole.
 139      * @param desc
 140      *            the class descriptor of the annotation class.
 141      * @param visible
 142      *            <tt>true</tt> if the annotation is visible at runtime.
 143      * @return a visitor to visit the annotation values, or <tt>null</tt> if
 144      *         this visitor is not interested in visiting this annotation.
 145      */
 146     public AnnotationVisitor visitTypeAnnotation(int typeRef,
 147             TypePath typePath, String desc, boolean visible) {
 148         if (api < Opcodes.ASM5) {
 149             throw new RuntimeException();
 150         }
 151         if (fv != null) {
 152             return fv.visitTypeAnnotation(typeRef, typePath, desc, visible);
 153         }
 154         return null;
 155     }
 156 
 157     /**
 158      * Visits a non standard attribute of the field.
 159      *
 160      * @param attr
 161      *            an attribute.
 162      */
 163     public void visitAttribute(Attribute attr) {
 164         if (fv != null) {
 165             fv.visitAttribute(attr);
 166         }
 167     }
 168 
 169     /**
 170      * Visits the end of the field. This method, which is the last one to be
 171      * called, is used to inform the visitor that all the annotations and
 172      * attributes of the field have been visited.
 173      */
 174     public void visitEnd() {
 175         if (fv != null) {
 176             fv.visitEnd();
 177         }
 178     }
 179 }
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