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 | +} | |