Tue, 03 Jun 2008 13:26:47 -0700
4075303: Use javap to enquire aboput a specific inner class
4348375: Javap is not internationalized
4459541: "javap -l" shows line numbers as signed short; they should be unsigned
4501660: change diagnostic of -help as 'print this help message and exit'
4776241: unused source file in javap...
4870651: javap should recognize generics, varargs, enum
4876942: javap invoked without args does not print help screen
4880663: javap could output whitespace between class name and opening brace
4975569: javap doesn't print new flag bits
6271787: javap dumps LocalVariableTypeTable attribute in hex, needs to print a table
6305779: javap: support annotations
6439940: Clean up javap implementation
6469569: wrong check of searchpath in JavapEnvironment
6474890: javap does not open .zip files in -classpath
6587786: Javap throws error : "ERROR:Could not find <classname>" for JRE classes
6622215: javap ignores certain relevant access flags
6622216: javap names some attributes incorrectly
6622232: javap gets whitespace confused
6622260: javap prints negative bytes incorrectly in hex
Reviewed-by: ksrini
jjg@46 | 1 | /* |
jjg@46 | 2 | * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved. |
jjg@46 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
jjg@46 | 4 | * |
jjg@46 | 5 | * This code is free software; you can redistribute it and/or modify it |
jjg@46 | 6 | * under the terms of the GNU General Public License version 2 only, as |
jjg@46 | 7 | * published by the Free Software Foundation. Sun designates this |
jjg@46 | 8 | * particular file as subject to the "Classpath" exception as provided |
jjg@46 | 9 | * by Sun in the LICENSE file that accompanied this code. |
jjg@46 | 10 | * |
jjg@46 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
jjg@46 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
jjg@46 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
jjg@46 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
jjg@46 | 15 | * accompanied this code). |
jjg@46 | 16 | * |
jjg@46 | 17 | * You should have received a copy of the GNU General Public License version |
jjg@46 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
jjg@46 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
jjg@46 | 20 | * |
jjg@46 | 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
jjg@46 | 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
jjg@46 | 23 | * have any questions. |
jjg@46 | 24 | */ |
jjg@46 | 25 | |
jjg@46 | 26 | |
jjg@46 | 27 | package com.sun.tools.classfile; |
jjg@46 | 28 | |
jjg@46 | 29 | import java.io.IOException; |
jjg@46 | 30 | |
jjg@46 | 31 | /** |
jjg@46 | 32 | * See JVMS3, section 4.4. |
jjg@46 | 33 | * |
jjg@46 | 34 | * <p><b>This is NOT part of any API supported by Sun Microsystems. If |
jjg@46 | 35 | * you write code that depends on this, you do so at your own risk. |
jjg@46 | 36 | * This code and its internal interfaces are subject to change or |
jjg@46 | 37 | * deletion without notice.</b> |
jjg@46 | 38 | */ |
jjg@46 | 39 | public class Descriptor { |
jjg@46 | 40 | public class InvalidDescriptor extends DescriptorException { |
jjg@46 | 41 | InvalidDescriptor(String desc) { |
jjg@46 | 42 | this.desc = desc; |
jjg@46 | 43 | this.index = -1; |
jjg@46 | 44 | } |
jjg@46 | 45 | |
jjg@46 | 46 | InvalidDescriptor(String desc, int index) { |
jjg@46 | 47 | this.desc = desc; |
jjg@46 | 48 | this.index = index; |
jjg@46 | 49 | } |
jjg@46 | 50 | |
jjg@46 | 51 | @Override |
jjg@46 | 52 | public String getMessage() { |
jjg@46 | 53 | // i18n |
jjg@46 | 54 | if (index == -1) |
jjg@46 | 55 | return "invalid descriptor \"" + desc + "\""; |
jjg@46 | 56 | else |
jjg@46 | 57 | return "descriptor is invalid at offset " + index + " in \"" + desc + "\""; |
jjg@46 | 58 | } |
jjg@46 | 59 | |
jjg@46 | 60 | public final String desc; |
jjg@46 | 61 | public final int index; |
jjg@46 | 62 | |
jjg@46 | 63 | } |
jjg@46 | 64 | |
jjg@46 | 65 | public Descriptor(ClassReader cr) throws IOException { |
jjg@46 | 66 | this(cr.readUnsignedShort()); |
jjg@46 | 67 | } |
jjg@46 | 68 | |
jjg@46 | 69 | public Descriptor(int index) { |
jjg@46 | 70 | this.index = index; |
jjg@46 | 71 | |
jjg@46 | 72 | } |
jjg@46 | 73 | |
jjg@46 | 74 | public String getValue(ConstantPool constant_pool) throws ConstantPoolException { |
jjg@46 | 75 | return constant_pool.getUTF8Value(index); |
jjg@46 | 76 | } |
jjg@46 | 77 | |
jjg@46 | 78 | public int getParameterCount(ConstantPool constant_pool) |
jjg@46 | 79 | throws ConstantPoolException, InvalidDescriptor { |
jjg@46 | 80 | String desc = getValue(constant_pool); |
jjg@46 | 81 | int end = desc.indexOf(")"); |
jjg@46 | 82 | if (end == -1) |
jjg@46 | 83 | throw new InvalidDescriptor(desc); |
jjg@46 | 84 | parse(desc, 0, end + 1); |
jjg@46 | 85 | return count; |
jjg@46 | 86 | |
jjg@46 | 87 | } |
jjg@46 | 88 | |
jjg@46 | 89 | public String getParameterTypes(ConstantPool constant_pool) |
jjg@46 | 90 | throws ConstantPoolException, InvalidDescriptor { |
jjg@46 | 91 | String desc = getValue(constant_pool); |
jjg@46 | 92 | int end = desc.indexOf(")"); |
jjg@46 | 93 | if (end == -1) |
jjg@46 | 94 | throw new InvalidDescriptor(desc); |
jjg@46 | 95 | return parse(desc, 0, end + 1); |
jjg@46 | 96 | } |
jjg@46 | 97 | |
jjg@46 | 98 | public String getReturnType(ConstantPool constant_pool) |
jjg@46 | 99 | throws ConstantPoolException, InvalidDescriptor { |
jjg@46 | 100 | String desc = getValue(constant_pool); |
jjg@46 | 101 | int end = desc.indexOf(")"); |
jjg@46 | 102 | if (end == -1) |
jjg@46 | 103 | throw new InvalidDescriptor(desc); |
jjg@46 | 104 | return parse(desc, end + 1, desc.length()); |
jjg@46 | 105 | } |
jjg@46 | 106 | |
jjg@46 | 107 | public String getFieldType(ConstantPool constant_pool) |
jjg@46 | 108 | throws ConstantPoolException, InvalidDescriptor { |
jjg@46 | 109 | String desc = getValue(constant_pool); |
jjg@46 | 110 | return parse(desc, 0, desc.length()); |
jjg@46 | 111 | } |
jjg@46 | 112 | |
jjg@46 | 113 | private String parse(String desc, int start, int end) |
jjg@46 | 114 | throws InvalidDescriptor { |
jjg@46 | 115 | int p = start; |
jjg@46 | 116 | StringBuffer sb = new StringBuffer(); |
jjg@46 | 117 | int dims = 0; |
jjg@46 | 118 | count = 0; |
jjg@46 | 119 | |
jjg@46 | 120 | while (p < end) { |
jjg@46 | 121 | String type; |
jjg@46 | 122 | char ch; |
jjg@46 | 123 | switch (ch = desc.charAt(p++)) { |
jjg@46 | 124 | case '(': |
jjg@46 | 125 | sb.append('('); |
jjg@46 | 126 | continue; |
jjg@46 | 127 | |
jjg@46 | 128 | case ')': |
jjg@46 | 129 | sb.append(')'); |
jjg@46 | 130 | continue; |
jjg@46 | 131 | |
jjg@46 | 132 | case '[': |
jjg@46 | 133 | dims++; |
jjg@46 | 134 | continue; |
jjg@46 | 135 | |
jjg@46 | 136 | case 'B': |
jjg@46 | 137 | type = "byte"; |
jjg@46 | 138 | break; |
jjg@46 | 139 | |
jjg@46 | 140 | case 'C': |
jjg@46 | 141 | type = "char"; |
jjg@46 | 142 | break; |
jjg@46 | 143 | |
jjg@46 | 144 | case 'D': |
jjg@46 | 145 | type = "double"; |
jjg@46 | 146 | break; |
jjg@46 | 147 | |
jjg@46 | 148 | case 'F': |
jjg@46 | 149 | type = "float"; |
jjg@46 | 150 | break; |
jjg@46 | 151 | |
jjg@46 | 152 | case 'I': |
jjg@46 | 153 | type = "int"; |
jjg@46 | 154 | break; |
jjg@46 | 155 | |
jjg@46 | 156 | case 'J': |
jjg@46 | 157 | type = "long"; |
jjg@46 | 158 | break; |
jjg@46 | 159 | |
jjg@46 | 160 | case 'L': |
jjg@46 | 161 | int sep = desc.indexOf(';', p); |
jjg@46 | 162 | if (sep == -1) |
jjg@46 | 163 | throw new InvalidDescriptor(desc, p - 1); |
jjg@46 | 164 | type = desc.substring(p, sep).replace('/', '.'); |
jjg@46 | 165 | p = sep + 1; |
jjg@46 | 166 | break; |
jjg@46 | 167 | |
jjg@46 | 168 | case 'S': |
jjg@46 | 169 | type = "short"; |
jjg@46 | 170 | break; |
jjg@46 | 171 | |
jjg@46 | 172 | case 'Z': |
jjg@46 | 173 | type = "boolean"; |
jjg@46 | 174 | break; |
jjg@46 | 175 | |
jjg@46 | 176 | case 'V': |
jjg@46 | 177 | type = "void"; |
jjg@46 | 178 | break; |
jjg@46 | 179 | |
jjg@46 | 180 | default: |
jjg@46 | 181 | throw new InvalidDescriptor(desc, p - 1); |
jjg@46 | 182 | } |
jjg@46 | 183 | |
jjg@46 | 184 | if (sb.length() > 1 && sb.charAt(0) == '(') |
jjg@46 | 185 | sb.append(", "); |
jjg@46 | 186 | sb.append(type); |
jjg@46 | 187 | for ( ; dims > 0; dims-- ) |
jjg@46 | 188 | sb.append("[]"); |
jjg@46 | 189 | |
jjg@46 | 190 | count++; |
jjg@46 | 191 | } |
jjg@46 | 192 | |
jjg@46 | 193 | return sb.toString(); |
jjg@46 | 194 | } |
jjg@46 | 195 | |
jjg@46 | 196 | public final int index; |
jjg@46 | 197 | private int count; |
jjg@46 | 198 | } |