1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/classes/com/sun/tools/classfile/Descriptor.java Tue Jun 03 13:26:47 2008 -0700
1.3 @@ -0,0 +1,198 @@
1.4 +/*
1.5 + * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Sun designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Sun in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.25 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.26 + * have any questions.
1.27 + */
1.28 +
1.29 +
1.30 +package com.sun.tools.classfile;
1.31 +
1.32 +import java.io.IOException;
1.33 +
1.34 +/**
1.35 + * See JVMS3, section 4.4.
1.36 + *
1.37 + * <p><b>This is NOT part of any API supported by Sun Microsystems. If
1.38 + * you write code that depends on this, you do so at your own risk.
1.39 + * This code and its internal interfaces are subject to change or
1.40 + * deletion without notice.</b>
1.41 + */
1.42 +public class Descriptor {
1.43 + public class InvalidDescriptor extends DescriptorException {
1.44 + InvalidDescriptor(String desc) {
1.45 + this.desc = desc;
1.46 + this.index = -1;
1.47 + }
1.48 +
1.49 + InvalidDescriptor(String desc, int index) {
1.50 + this.desc = desc;
1.51 + this.index = index;
1.52 + }
1.53 +
1.54 + @Override
1.55 + public String getMessage() {
1.56 + // i18n
1.57 + if (index == -1)
1.58 + return "invalid descriptor \"" + desc + "\"";
1.59 + else
1.60 + return "descriptor is invalid at offset " + index + " in \"" + desc + "\"";
1.61 + }
1.62 +
1.63 + public final String desc;
1.64 + public final int index;
1.65 +
1.66 + }
1.67 +
1.68 + public Descriptor(ClassReader cr) throws IOException {
1.69 + this(cr.readUnsignedShort());
1.70 + }
1.71 +
1.72 + public Descriptor(int index) {
1.73 + this.index = index;
1.74 +
1.75 + }
1.76 +
1.77 + public String getValue(ConstantPool constant_pool) throws ConstantPoolException {
1.78 + return constant_pool.getUTF8Value(index);
1.79 + }
1.80 +
1.81 + public int getParameterCount(ConstantPool constant_pool)
1.82 + throws ConstantPoolException, InvalidDescriptor {
1.83 + String desc = getValue(constant_pool);
1.84 + int end = desc.indexOf(")");
1.85 + if (end == -1)
1.86 + throw new InvalidDescriptor(desc);
1.87 + parse(desc, 0, end + 1);
1.88 + return count;
1.89 +
1.90 + }
1.91 +
1.92 + public String getParameterTypes(ConstantPool constant_pool)
1.93 + throws ConstantPoolException, InvalidDescriptor {
1.94 + String desc = getValue(constant_pool);
1.95 + int end = desc.indexOf(")");
1.96 + if (end == -1)
1.97 + throw new InvalidDescriptor(desc);
1.98 + return parse(desc, 0, end + 1);
1.99 + }
1.100 +
1.101 + public String getReturnType(ConstantPool constant_pool)
1.102 + throws ConstantPoolException, InvalidDescriptor {
1.103 + String desc = getValue(constant_pool);
1.104 + int end = desc.indexOf(")");
1.105 + if (end == -1)
1.106 + throw new InvalidDescriptor(desc);
1.107 + return parse(desc, end + 1, desc.length());
1.108 + }
1.109 +
1.110 + public String getFieldType(ConstantPool constant_pool)
1.111 + throws ConstantPoolException, InvalidDescriptor {
1.112 + String desc = getValue(constant_pool);
1.113 + return parse(desc, 0, desc.length());
1.114 + }
1.115 +
1.116 + private String parse(String desc, int start, int end)
1.117 + throws InvalidDescriptor {
1.118 + int p = start;
1.119 + StringBuffer sb = new StringBuffer();
1.120 + int dims = 0;
1.121 + count = 0;
1.122 +
1.123 + while (p < end) {
1.124 + String type;
1.125 + char ch;
1.126 + switch (ch = desc.charAt(p++)) {
1.127 + case '(':
1.128 + sb.append('(');
1.129 + continue;
1.130 +
1.131 + case ')':
1.132 + sb.append(')');
1.133 + continue;
1.134 +
1.135 + case '[':
1.136 + dims++;
1.137 + continue;
1.138 +
1.139 + case 'B':
1.140 + type = "byte";
1.141 + break;
1.142 +
1.143 + case 'C':
1.144 + type = "char";
1.145 + break;
1.146 +
1.147 + case 'D':
1.148 + type = "double";
1.149 + break;
1.150 +
1.151 + case 'F':
1.152 + type = "float";
1.153 + break;
1.154 +
1.155 + case 'I':
1.156 + type = "int";
1.157 + break;
1.158 +
1.159 + case 'J':
1.160 + type = "long";
1.161 + break;
1.162 +
1.163 + case 'L':
1.164 + int sep = desc.indexOf(';', p);
1.165 + if (sep == -1)
1.166 + throw new InvalidDescriptor(desc, p - 1);
1.167 + type = desc.substring(p, sep).replace('/', '.');
1.168 + p = sep + 1;
1.169 + break;
1.170 +
1.171 + case 'S':
1.172 + type = "short";
1.173 + break;
1.174 +
1.175 + case 'Z':
1.176 + type = "boolean";
1.177 + break;
1.178 +
1.179 + case 'V':
1.180 + type = "void";
1.181 + break;
1.182 +
1.183 + default:
1.184 + throw new InvalidDescriptor(desc, p - 1);
1.185 + }
1.186 +
1.187 + if (sb.length() > 1 && sb.charAt(0) == '(')
1.188 + sb.append(", ");
1.189 + sb.append(type);
1.190 + for ( ; dims > 0; dims-- )
1.191 + sb.append("[]");
1.192 +
1.193 + count++;
1.194 + }
1.195 +
1.196 + return sb.toString();
1.197 + }
1.198 +
1.199 + public final int index;
1.200 + private int count;
1.201 +}
