1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/classes/com/sun/tools/classfile/Signature.java Tue Jun 03 13:26:47 2008 -0700
1.3 @@ -0,0 +1,275 @@
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 +package com.sun.tools.classfile;
1.30 +
1.31 +import java.util.ArrayList;
1.32 +import java.util.List;
1.33 +
1.34 +/**
1.35 + * See JVMS3 4.4.4.
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 Signature extends Descriptor {
1.43 +
1.44 + public Signature(int index) {
1.45 + super(index);
1.46 + }
1.47 +
1.48 + public Type getType(ConstantPool constant_pool) throws ConstantPoolException {
1.49 + if (type == null)
1.50 + type = parse(getValue(constant_pool));
1.51 + return type;
1.52 + }
1.53 +
1.54 + @Override
1.55 + public int getParameterCount(ConstantPool constant_pool) throws ConstantPoolException {
1.56 + Type.MethodType m = (Type.MethodType) getType(constant_pool);
1.57 + return m.argTypes.size();
1.58 + }
1.59 +
1.60 + @Override
1.61 + public String getParameterTypes(ConstantPool constant_pool) throws ConstantPoolException {
1.62 + Type.MethodType m = (Type.MethodType) getType(constant_pool);
1.63 + StringBuilder sb = new StringBuilder();
1.64 + sb.append("(");
1.65 + String sep = "";
1.66 + for (Type argType: m.argTypes) {
1.67 + sb.append(sep);
1.68 + sb.append(argType);
1.69 + sep = ", ";
1.70 + }
1.71 + sb.append(")");
1.72 + return sb.toString();
1.73 + }
1.74 +
1.75 + @Override
1.76 + public String getReturnType(ConstantPool constant_pool) throws ConstantPoolException {
1.77 + Type.MethodType m = (Type.MethodType) getType(constant_pool);
1.78 + return m.returnType.toString();
1.79 + }
1.80 +
1.81 + @Override
1.82 + public String getFieldType(ConstantPool constant_pool) throws ConstantPoolException {
1.83 + return getType(constant_pool).toString();
1.84 + }
1.85 +
1.86 + private Type parse(String sig) {
1.87 + this.sig = sig;
1.88 + sigp = 0;
1.89 +
1.90 + List<Type> typeArgTypes = null;
1.91 + if (sig.charAt(sigp) == '<')
1.92 + typeArgTypes = parseTypeArgTypes();
1.93 +
1.94 + if (sig.charAt(sigp) == '(') {
1.95 + List<Type> argTypes = parseTypeSignatures(')');
1.96 + Type returnType = parseTypeSignature();
1.97 + List<Type> throwsTypes = null;
1.98 + while (sigp < sig.length() && sig.charAt(sigp) == '^') {
1.99 + sigp++;
1.100 + if (throwsTypes == null)
1.101 + throwsTypes = new ArrayList<Type>();
1.102 + throwsTypes.add(parseTypeSignature());
1.103 + }
1.104 + return new Type.MethodType(typeArgTypes, argTypes, returnType, throwsTypes);
1.105 + } else {
1.106 + Type t = parseTypeSignature();
1.107 + if (typeArgTypes == null && sigp == sig.length())
1.108 + return t;
1.109 + Type superclass = t;
1.110 + List<Type> superinterfaces = new ArrayList<Type>();
1.111 + while (sigp < sig.length())
1.112 + superinterfaces.add(parseTypeSignature());
1.113 + return new Type.ClassSigType(typeArgTypes, superclass, superinterfaces);
1.114 +
1.115 + }
1.116 + }
1.117 +
1.118 + private Type parseTypeSignature() {
1.119 + switch (sig.charAt(sigp)) {
1.120 + case 'B':
1.121 + sigp++;
1.122 + return new Type.SimpleType("byte");
1.123 +
1.124 + case 'C':
1.125 + sigp++;
1.126 + return new Type.SimpleType("char");
1.127 +
1.128 + case 'D':
1.129 + sigp++;
1.130 + return new Type.SimpleType("double");
1.131 +
1.132 + case 'F':
1.133 + sigp++;
1.134 + return new Type.SimpleType("float");
1.135 +
1.136 + case 'I':
1.137 + sigp++;
1.138 + return new Type.SimpleType("int");
1.139 +
1.140 + case 'J':
1.141 + sigp++;
1.142 + return new Type.SimpleType("long");
1.143 +
1.144 + case 'L':
1.145 + return parseClassTypeSignature();
1.146 +
1.147 + case 'S':
1.148 + sigp++;
1.149 + return new Type.SimpleType("short");
1.150 +
1.151 + case 'T':
1.152 + return parseTypeVariableSignature();
1.153 +
1.154 + case 'V':
1.155 + sigp++;
1.156 + return new Type.SimpleType("void");
1.157 +
1.158 + case 'Z':
1.159 + sigp++;
1.160 + return new Type.SimpleType("boolean");
1.161 +
1.162 + case '[':
1.163 + sigp++;
1.164 + return new Type.ArrayType(parseTypeSignature());
1.165 +
1.166 + case '*':
1.167 + sigp++;
1.168 + return new Type.WildcardType();
1.169 +
1.170 + case '+':
1.171 + sigp++;
1.172 + return new Type.WildcardType("extends", parseTypeSignature());
1.173 +
1.174 + case '-':
1.175 + sigp++;
1.176 + return new Type.WildcardType("super", parseTypeSignature());
1.177 +
1.178 + default:
1.179 + throw new IllegalStateException(debugInfo());
1.180 + }
1.181 + }
1.182 +
1.183 + private List<Type> parseTypeSignatures(char term) {
1.184 + sigp++;
1.185 + List<Type> types = new ArrayList<Type>();
1.186 + while (sig.charAt(sigp) != term)
1.187 + types.add(parseTypeSignature());
1.188 + sigp++;
1.189 + return types;
1.190 + }
1.191 +
1.192 + private Type parseClassTypeSignature() {
1.193 + assert sig.charAt(sigp) == 'L';
1.194 + sigp++;
1.195 + return parseClassTypeSignatureRest();
1.196 + }
1.197 +
1.198 + private Type parseClassTypeSignatureRest() {
1.199 + StringBuilder sb = new StringBuilder();
1.200 + Type t = null;
1.201 + char sigch;
1.202 + while (true) {
1.203 + switch (sigch = sig.charAt(sigp)) {
1.204 + case '/':
1.205 + sigp++;
1.206 + sb.append(".");
1.207 + break;
1.208 +
1.209 + case '.':
1.210 + sigp++;
1.211 + if (t == null)
1.212 + t = new Type.SimpleType(sb.toString());
1.213 + return new Type.InnerClassType(t, parseClassTypeSignatureRest());
1.214 +
1.215 + case ';':
1.216 + sigp++;
1.217 + if (t == null)
1.218 + t = new Type.SimpleType(sb.toString());
1.219 + return t;
1.220 +
1.221 + case '<':
1.222 + List<Type> argTypes = parseTypeSignatures('>');
1.223 + t = new Type.ClassType(sb.toString(), argTypes);
1.224 + break;
1.225 +
1.226 + default:
1.227 + sigp++;
1.228 + sb.append(sigch);
1.229 + break;
1.230 + }
1.231 + }
1.232 + }
1.233 +
1.234 + private List<Type> parseTypeArgTypes() {
1.235 + assert sig.charAt(sigp) == '<';
1.236 + sigp++;
1.237 + List<Type> types = null;
1.238 + types = new ArrayList<Type>();
1.239 + while (sig.charAt(sigp) != '>')
1.240 + types.add(parseTypeArgType());
1.241 + sigp++;
1.242 + return types;
1.243 + }
1.244 +
1.245 + private Type parseTypeArgType() {
1.246 + int sep = sig.indexOf(":", sigp);
1.247 + String name = sig.substring(sigp, sep);
1.248 + Type classBound = null;
1.249 + List<Type> interfaceBounds = null;
1.250 + sigp = sep + 1;
1.251 + if (sig.charAt(sigp) != ':')
1.252 + classBound = parseTypeSignature();
1.253 + while (sig.charAt(sigp) == ':') {
1.254 + sigp++;
1.255 + if (interfaceBounds == null)
1.256 + interfaceBounds = new ArrayList<Type>();
1.257 + interfaceBounds.add(parseTypeSignature());
1.258 + }
1.259 + return new Type.TypeArgType(name, classBound, interfaceBounds);
1.260 + }
1.261 +
1.262 + private Type parseTypeVariableSignature() {
1.263 + sigp++;
1.264 + int sep = sig.indexOf(';', sigp);
1.265 + Type t = new Type.SimpleType(sig.substring(sigp, sep));
1.266 + sigp = sep + 1;
1.267 + return t;
1.268 + }
1.269 +
1.270 + private String debugInfo() {
1.271 + return sig.substring(0, sigp) + "!" + sig.charAt(sigp) + "!" + sig.substring(sigp+1);
1.272 + }
1.273 +
1.274 + private String sig;
1.275 + private int sigp;
1.276 +
1.277 + private Type type;
1.278 +}
