1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/rt/emul/compact/src/main/java/sun/invoke/util/BytecodeDescriptor.java Sun Aug 17 20:09:05 2014 +0200
1.3 @@ -0,0 +1,137 @@
1.4 +/*
1.5 + * Copyright (c) 2008, 2011, Oracle and/or its affiliates. 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. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package sun.invoke.util;
1.30 +
1.31 +import java.lang.invoke.MethodType;
1.32 +import java.util.ArrayList;
1.33 +import java.util.List;
1.34 +
1.35 +/**
1.36 + * Utility routines for dealing with bytecode-level signatures.
1.37 + * @author jrose
1.38 + */
1.39 +public class BytecodeDescriptor {
1.40 +
1.41 + private BytecodeDescriptor() { } // cannot instantiate
1.42 +
1.43 + public static List<Class<?>> parseMethod(String bytecodeSignature, ClassLoader loader) {
1.44 + return parseMethod(bytecodeSignature, 0, bytecodeSignature.length(), loader);
1.45 + }
1.46 +
1.47 + static List<Class<?>> parseMethod(String bytecodeSignature,
1.48 + int start, int end, ClassLoader loader) {
1.49 + if (loader == null)
1.50 + loader = ClassLoader.getSystemClassLoader();
1.51 + String str = bytecodeSignature;
1.52 + int[] i = {start};
1.53 + ArrayList<Class<?>> ptypes = new ArrayList<Class<?>>();
1.54 + if (i[0] < end && str.charAt(i[0]) == '(') {
1.55 + ++i[0]; // skip '('
1.56 + while (i[0] < end && str.charAt(i[0]) != ')') {
1.57 + Class<?> pt = parseSig(str, i, end, loader);
1.58 + if (pt == null || pt == void.class)
1.59 + parseError(str, "bad argument type");
1.60 + ptypes.add(pt);
1.61 + }
1.62 + ++i[0]; // skip ')'
1.63 + } else {
1.64 + parseError(str, "not a method type");
1.65 + }
1.66 + Class<?> rtype = parseSig(str, i, end, loader);
1.67 + if (rtype == null || i[0] != end)
1.68 + parseError(str, "bad return type");
1.69 + ptypes.add(rtype);
1.70 + return ptypes;
1.71 + }
1.72 +
1.73 + static private void parseError(String str, String msg) {
1.74 + throw new IllegalArgumentException("bad signature: "+str+": "+msg);
1.75 + }
1.76 +
1.77 + static private Class<?> parseSig(String str, int[] i, int end, ClassLoader loader) {
1.78 + if (i[0] == end) return null;
1.79 + char c = str.charAt(i[0]++);
1.80 + if (c == 'L') {
1.81 + int begc = i[0], endc = str.indexOf(';', begc);
1.82 + if (endc < 0) return null;
1.83 + i[0] = endc+1;
1.84 + String name = str.substring(begc, endc).replace('/', '.');
1.85 + try {
1.86 + return loader.loadClass(name);
1.87 + } catch (ClassNotFoundException ex) {
1.88 + throw new TypeNotPresentException(name, ex);
1.89 + }
1.90 + } else if (c == '[') {
1.91 + Class<?> t = parseSig(str, i, end, loader);
1.92 + if (t != null)
1.93 + t = java.lang.reflect.Array.newInstance(t, 0).getClass();
1.94 + return t;
1.95 + } else {
1.96 + return Wrapper.forBasicType(c).primitiveType();
1.97 + }
1.98 + }
1.99 +
1.100 + public static String unparse(Class<?> type) {
1.101 + StringBuilder sb = new StringBuilder();
1.102 + unparseSig(type, sb);
1.103 + return sb.toString();
1.104 + }
1.105 +
1.106 + public static String unparse(MethodType type) {
1.107 + return unparseMethod(type.returnType(), type.parameterList());
1.108 + }
1.109 +
1.110 + public static String unparse(Object type) {
1.111 + if (type instanceof Class<?>)
1.112 + return unparse((Class<?>) type);
1.113 + if (type instanceof MethodType)
1.114 + return unparse((MethodType) type);
1.115 + return (String) type;
1.116 + }
1.117 +
1.118 + public static String unparseMethod(Class<?> rtype, List<Class<?>> ptypes) {
1.119 + StringBuilder sb = new StringBuilder();
1.120 + sb.append('(');
1.121 + for (Class<?> pt : ptypes)
1.122 + unparseSig(pt, sb);
1.123 + sb.append(')');
1.124 + unparseSig(rtype, sb);
1.125 + return sb.toString();
1.126 + }
1.127 +
1.128 + static private void unparseSig(Class<?> t, StringBuilder sb) {
1.129 + char c = Wrapper.forBasicType(t).basicTypeChar();
1.130 + if (c != 'L') {
1.131 + sb.append(c);
1.132 + } else {
1.133 + boolean lsemi = (!t.isArray());
1.134 + if (lsemi) sb.append('L');
1.135 + sb.append(t.getName().replace('.', '/'));
1.136 + if (lsemi) sb.append(';');
1.137 + }
1.138 + }
1.139 +
1.140 +}