/*
 * Copyright (c) 2015, 2016, 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 jdk.internal.jimage.decompressor;

import java.util.ArrayList;
import java.util.List;

A descriptor parser used to extract java type strings from UTF_8 descriptors.
Implementation Note:This class needs to maintain JDK 8 source compatibility. It is used internally in the JDK to implement jimage/jrtfs access, but also compiled and delivered as part of the jrtfs.jar to support access to the jimage file provided by the shipped JDK by tools running on JDK 8.
/** * * A descriptor parser used to extract java type strings from * UTF_8 descriptors. * * @implNote This class needs to maintain JDK 8 source compatibility. * * It is used internally in the JDK to implement jimage/jrtfs access, * but also compiled and delivered as part of the jrtfs.jar to support access * to the jimage file provided by the shipped JDK by tools running on JDK 8. */
public class SignatureParser { public static class ParseResult { public final List<String> types = new ArrayList<>(); public String formatted; private ParseResult() {} } private SignatureParser() {} public static String reconstruct(String formatted, List<String> arguments) { int arg_index = 0; char[] chars = formatted.toCharArray(); StringBuilder out = new StringBuilder(); for (int i = 0; i < chars.length; i++) { char c = chars[i]; out.append(c); switch (c) { case 'L': { String pkg = arguments.get(arg_index); if(pkg.length() > 0) { out.append(pkg).append("/"); } arg_index+=1; out.append(arguments.get(arg_index)); arg_index+=1; break; } default: { break; } } } return out.toString(); } public static ParseResult parseSignatureDescriptor(String str) { ParseResult res = new ParseResult(); char[] chars = str.toCharArray(); StringBuilder type = null; StringBuilder formatted = new StringBuilder(); for (int i = 0; i < chars.length; i++) { char c = chars[i]; switch (c) { case ';': case ':': case '<': { if(type != null) { String fullName = type.toString(); int endIndex = fullName.lastIndexOf("/"); String clazz = fullName; String pkg = ""; if(endIndex != -1) { pkg = fullName.substring(0, endIndex); clazz = fullName.substring(endIndex+1); } res.types.add(pkg); res.types.add(clazz); } formatted.append(c); type = null; break; } case 'L': { if(type == null) { type = new StringBuilder(); formatted.append(c); } else { type.append(c); } break; } default: { if(type == null) { formatted.append(c); } else { type.append(c); } break; } } } res.formatted = formatted.toString(); return res; } }