author | martin |
Tue, 15 Sep 2015 21:56:04 -0700 | |
changeset 32649 | 2ee9017c7597 |
parent 25859 | 3317bb8137f4 |
child 32986 | ea54ac8672e7 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.invoke.util; |
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import java.lang.invoke.MethodType; |
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import java.util.ArrayList; |
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import java.util.List; |
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/** |
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* Utility routines for dealing with bytecode-level signatures. |
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* @author jrose |
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*/ |
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public class BytecodeDescriptor { |
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private BytecodeDescriptor() { } // cannot instantiate |
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public static List<Class<?>> parseMethod(String bytecodeSignature, ClassLoader loader) { |
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return parseMethod(bytecodeSignature, 0, bytecodeSignature.length(), loader); |
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} |
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static List<Class<?>> parseMethod(String bytecodeSignature, |
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int start, int end, ClassLoader loader) { |
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if (loader == null) |
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loader = ClassLoader.getSystemClassLoader(); |
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String str = bytecodeSignature; |
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int[] i = {start}; |
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ArrayList<Class<?>> ptypes = new ArrayList<Class<?>>(); |
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if (i[0] < end && str.charAt(i[0]) == '(') { |
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++i[0]; // skip '(' |
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while (i[0] < end && str.charAt(i[0]) != ')') { |
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Class<?> pt = parseSig(str, i, end, loader); |
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if (pt == null || pt == void.class) |
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parseError(str, "bad argument type"); |
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ptypes.add(pt); |
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} |
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++i[0]; // skip ')' |
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} else { |
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parseError(str, "not a method type"); |
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} |
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Class<?> rtype = parseSig(str, i, end, loader); |
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if (rtype == null || i[0] != end) |
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parseError(str, "bad return type"); |
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ptypes.add(rtype); |
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return ptypes; |
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} |
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private static void parseError(String str, String msg) { |
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throw new IllegalArgumentException("bad signature: "+str+": "+msg); |
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} |
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private static Class<?> parseSig(String str, int[] i, int end, ClassLoader loader) { |
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if (i[0] == end) return null; |
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char c = str.charAt(i[0]++); |
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if (c == 'L') { |
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int begc = i[0], endc = str.indexOf(';', begc); |
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if (endc < 0) return null; |
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i[0] = endc+1; |
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String name = str.substring(begc, endc).replace('/', '.'); |
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try { |
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return loader.loadClass(name); |
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} catch (ClassNotFoundException ex) { |
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throw new TypeNotPresentException(name, ex); |
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} |
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} else if (c == '[') { |
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Class<?> t = parseSig(str, i, end, loader); |
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if (t != null) |
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t = java.lang.reflect.Array.newInstance(t, 0).getClass(); |
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return t; |
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} else { |
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return Wrapper.forBasicType(c).primitiveType(); |
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} |
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} |
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public static String unparse(Class<?> type) { |
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StringBuilder sb = new StringBuilder(); |
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unparseSig(type, sb); |
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return sb.toString(); |
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} |
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public static String unparse(MethodType type) { |
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return unparseMethod(type.returnType(), type.parameterList()); |
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} |
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public static String unparse(Object type) { |
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if (type instanceof Class<?>) |
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return unparse((Class<?>) type); |
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if (type instanceof MethodType) |
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return unparse((MethodType) type); |
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return (String) type; |
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} |
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public static String unparseMethod(Class<?> rtype, List<Class<?>> ptypes) { |
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StringBuilder sb = new StringBuilder(); |
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sb.append('('); |
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for (Class<?> pt : ptypes) |
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unparseSig(pt, sb); |
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sb.append(')'); |
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unparseSig(rtype, sb); |
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return sb.toString(); |
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} |
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private static void unparseSig(Class<?> t, StringBuilder sb) { |
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char c = Wrapper.forBasicType(t).basicTypeChar(); |
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if (c != 'L') { |
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sb.append(c); |
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} else { |
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boolean lsemi = (!t.isArray()); |
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if (lsemi) sb.append('L'); |
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sb.append(t.getName().replace('.', '/')); |
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if (lsemi) sb.append(';'); |
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} |
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} |
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} |