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 60 package jdk.internal.org.objectweb.asm; 61 62 /** 63 * A reference to a field or a method. 64 * 65 * @author Remi Forax 66 * @author Eric Bruneton 67 */ 68 public final class Handle { 69 70 /** 71 * The kind of field or method designated by this Handle. Should be 72 * {@link Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, 73 * {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, 74 * {@link Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC}, 75 * {@link Opcodes#H_INVOKESPECIAL}, {@link Opcodes#H_NEWINVOKESPECIAL} or 76 * {@link Opcodes#H_INVOKEINTERFACE}. 77 */ 78 final int tag; 79 80 /** 81 * The internal name of the class that owns the field or method designated 82 * by this handle. 83 */ 84 final String owner; 85 86 /** 87 * The name of the field or method designated by this handle. 88 */ 89 final String name; 90 91 /** 92 * The descriptor of the field or method designated by this handle. 93 */ 94 final String desc; 95 96 /* 97 * indicator of static method of interface 98 */ 99 final boolean intfs; 100 101 /** 102 * Constructs a new field or method handle. 103 * 104 * @param tag 105 * the kind of field or method designated by this Handle. Must be 106 * {@link Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, 107 * {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, 108 * {@link Opcodes#H_INVOKEVIRTUAL}, 109 * {@link Opcodes#H_INVOKESTATIC}, 110 * {@link Opcodes#H_INVOKESPECIAL}, 111 * {@link Opcodes#H_NEWINVOKESPECIAL} or 112 * {@link Opcodes#H_INVOKEINTERFACE}. 113 * @param owner 114 * the internal name of the class that owns the field or method 115 * designated by this handle. 116 * @param name 117 * the name of the field or method designated by this handle. 118 * @param desc 119 * the descriptor of the field or method designated by this 120 * handle. 121 */ 122 123 public Handle(int tag, String owner, String name, String desc) { 124 this.tag = tag; 125 this.owner = owner; 126 this.name = name; 127 this.desc = desc; 128 this.intfs = false; 129 } 130 131 /** 132 * Returns the kind of field or method designated by this handle. 133 * 134 * @return {@link Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, 135 /** 136 * Constructs a new field or method handle. 137 * 138 * @param tag 139 * the kind of field or method designated by this Handle. Must be 140 * {@link Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, 141 * {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, 142 * {@link Opcodes#H_INVOKEVIRTUAL}, 143 * {@link Opcodes#H_INVOKESTATIC}, 144 * {@link Opcodes#H_INVOKESPECIAL}, 145 * {@link Opcodes#H_NEWINVOKESPECIAL} or 146 * {@link Opcodes#H_INVOKEINTERFACE}. 147 * @param owner 148 * the internal name of the class that owns the field or method 149 * designated by this handle. 150 * @param name 151 * the name of the field or method designated by this handle. 152 * @param desc 153 * the descriptor of the field or method designated by this 154 * handle. 155 * @param intfs 156 * the indicator of static method in interface 157 */ 158 159 public Handle(int tag, String owner, String name, String desc, boolean intfs) { 160 this.tag = tag; 161 this.owner = owner; 162 this.name = name; 163 this.desc = desc; 164 this.intfs = (tag == Opcodes.H_INVOKESTATIC) && intfs; 165 } 166 167 /** 168 * Returns the kind of field or method designated by this handle. 169 * 170 * @return {@link Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, 171 * {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, 172 * {@link Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC}, 173 * {@link Opcodes#H_INVOKESPECIAL}, 174 * {@link Opcodes#H_NEWINVOKESPECIAL} or 175 * {@link Opcodes#H_INVOKEINTERFACE}. 176 */ 177 public int getTag() { 178 return tag; 179 } 180 181 /** 182 * Returns the internal name of the class that owns the field or method 183 * designated by this handle. 184 * 185 * @return the internal name of the class that owns the field or method 186 * designated by this handle. 187 */ 188 public String getOwner() { 189 return owner; 190 } 191 192 /** 193 * Returns the name of the field or method designated by this handle. 194 * 195 * @return the name of the field or method designated by this handle. 196 */ 197 public String getName() { 198 return name; 199 } 200 201 /** 202 * Returns the descriptor of the field or method designated by this handle. 203 * 204 * @return the descriptor of the field or method designated by this handle. 205 */ 206 public String getDesc() { 207 return desc; 208 } 209 210 /** 211 * Return if it is pointing to interface static method 212 */ 213 public boolean getIntfs() { 214 return intfs; 215 } 216 217 @Override 218 public boolean equals(Object obj) { 219 if (obj == this) { 220 return true; 221 } 222 if (!(obj instanceof Handle)) { 223 return false; 224 } 225 Handle h = (Handle) obj; 226 return tag == h.tag && owner.equals(h.owner) && name.equals(h.name) 227 && desc.equals(h.desc); 228 } 229 230 @Override 231 public int hashCode() { 232 return tag + owner.hashCode() * name.hashCode() * desc.hashCode(); 233 } 234 235 /** 236 * Returns the textual representation of this handle. The textual 237 * representation is: 238 * 239 * <pre> 240 * owner '.' name desc ' ' '(' tag ')' 241 * </pre> 242 * 243 * . As this format is unambiguous, it can be parsed if necessary. 244 */ 245 @Override 246 public String toString() { 247 return owner + '.' + name + desc + " (" + tag + ')'; 248 } 249 }