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