Showing the changes to java/pkg/sun/invoke/util/BytecodeDescriptor.java (1 of 18352 files). Show all
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| 1 | /* | ||
| 2 | * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.invoke.util; | ||
| 27 | |||
| 28 | import java.lang.invoke.MethodType; | ||
| 29 | import java.util.ArrayList; | ||
| 30 | import java.util.List; | ||
| 31 | |||
| 32 | /** | ||
| 33 | * Utility routines for dealing with bytecode-level signatures. | ||
| 34 | * @author jrose | ||
| 35 | */ | ||
| 36 | public class BytecodeDescriptor { | ||
| 37 | |||
| 38 | private BytecodeDescriptor() { } // cannot instantiate | ||
| 39 | |||
| 40 | public static List<Class<?>> parseMethod(String bytecodeSignature, ClassLoader loader) { | ||
| 41 | return parseMethod(bytecodeSignature, 0, bytecodeSignature.length(), loader); | ||
| 42 | } | ||
| 43 | |||
| 44 | static List<Class<?>> parseMethod(String bytecodeSignature, | ||
| 45 | int start, int end, ClassLoader loader) { | ||
| 46 | if (loader == null) | ||
| 47 | loader = ClassLoader.getSystemClassLoader(); | ||
| 48 | String str = bytecodeSignature; | ||
| 49 | int[] i = {start}; | ||
| 50 | ArrayList<Class<?>> ptypes = new ArrayList<Class<?>>(); | ||
| 51 | if (i[0] < end && str.charAt(i[0]) == '(') { | ||
| 52 | ++i[0]; // skip '(' | ||
| 53 | while (i[0] < end && str.charAt(i[0]) != ')') { | ||
| 54 | Class<?> pt = parseSig(str, i, end, loader); | ||
| 55 | if (pt == null || pt == void.class) | ||
| 56 | parseError(str, "bad argument type"); | ||
| 57 | ptypes.add(pt); | ||
| 58 | } | ||
| 59 | ++i[0]; // skip ')' | ||
| 60 | } else { | ||
| 61 | parseError(str, "not a method type"); | ||
| 62 | } | ||
| 63 | Class<?> rtype = parseSig(str, i, end, loader); | ||
| 64 | if (rtype == null || i[0] != end) | ||
| 65 | parseError(str, "bad return type"); | ||
| 66 | ptypes.add(rtype); | ||
| 67 | return ptypes; | ||
| 68 | } | ||
| 69 | |||
| 70 | static private void parseError(String str, String msg) { | ||
| 71 | throw new IllegalArgumentException("bad signature: "+str+": "+msg); | ||
| 72 | } | ||
| 73 | |||
| 74 | static private Class<?> parseSig(String str, int[] i, int end, ClassLoader loader) { | ||
| 75 | if (i[0] == end) return null; | ||
| 76 | char c = str.charAt(i[0]++); | ||
| 77 | if (c == 'L') { | ||
| 78 | int begc = i[0], endc = str.indexOf(';', begc); | ||
| 79 | if (endc < 0) return null; | ||
| 80 | i[0] = endc+1; | ||
| 81 | String name = str.substring(begc, endc).replace('/', '.'); | ||
| 82 | try { | ||
| 83 | return loader.loadClass(name); | ||
| 84 | } catch (ClassNotFoundException ex) { | ||
| 85 | throw new TypeNotPresentException(name, ex); | ||
| 86 | } | ||
| 87 | } else if (c == '[') { | ||
| 88 | Class<?> t = parseSig(str, i, end, loader); | ||
| 89 | if (t != null) | ||
| 90 | t = java.lang.reflect.Array.newInstance(t, 0).getClass(); | ||
| 91 | return t; | ||
| 92 | } else { | ||
| 93 | return Wrapper.forBasicType(c).primitiveType(); | ||
| 94 | } | ||
| 95 | } | ||
| 96 | |||
| 97 | public static String unparse(Class<?> type) { | ||
| 98 | StringBuilder sb = new StringBuilder(); | ||
| 99 | unparseSig(type, sb); | ||
| 100 | return sb.toString(); | ||
| 101 | } | ||
| 102 | |||
| 103 | public static String unparse(MethodType type) { | ||
| 104 | return unparseMethod(type.returnType(), type.parameterList()); | ||
| 105 | } | ||
| 106 | |||
| 107 | public static String unparse(Object type) { | ||
| 108 | if (type instanceof Class<?>) | ||
| 109 | return unparse((Class<?>) type); | ||
| 110 | if (type instanceof MethodType) | ||
| 111 | return unparse((MethodType) type); | ||
| 112 | return (String) type; | ||
| 113 | } | ||
| 114 | |||
| 115 | public static String unparseMethod(Class<?> rtype, List<Class<?>> ptypes) { | ||
| 116 | StringBuilder sb = new StringBuilder(); | ||
| 117 | sb.append('('); | ||
| 118 | for (Class<?> pt : ptypes) | ||
| 119 | unparseSig(pt, sb); | ||
| 120 | sb.append(')'); | ||
| 121 | unparseSig(rtype, sb); | ||
| 122 | return sb.toString(); | ||
| 123 | } | ||
| 124 | |||
| 125 | static private void unparseSig(Class<?> t, StringBuilder sb) { | ||
| 126 | char c = Wrapper.forBasicType(t).basicTypeChar(); | ||
| 127 | if (c != 'L') { | ||
| 128 | sb.append(c); | ||
| 129 | } else { | ||
| 130 | boolean lsemi = (!t.isArray()); | ||
| 131 | if (lsemi) sb.append('L'); | ||
| 132 | sb.append(t.getName().replace('.', '/')); | ||
| 133 | if (lsemi) sb.append(';'); | ||
| 134 | } | ||
| 135 | } | ||
| 136 | |||
| 137 | } | ||