| /* |
| * 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. |
| */ |
| |
| /* |
| * This file is available under and governed by the GNU General Public |
| * License version 2 only, as published by the Free Software Foundation. |
| * However, the following notice accompanied the original version of this |
| * file: |
| * |
| * ASM: a very small and fast Java bytecode manipulation framework |
| * Copyright (c) 2000-2011 INRIA, France Telecom |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the copyright holders nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package jdk.internal.org.objectweb.asm.signature; |
| |
| /** |
| * A type signature parser to make a signature visitor visit an existing |
| * signature. |
| * |
| * @author Thomas Hallgren |
| * @author Eric Bruneton |
| */ |
| public class SignatureReader { |
| |
| /** |
| * The signature to be read. |
| */ |
| private final String signature; |
| |
| /** |
| * Constructs a {@link SignatureReader} for the given signature. |
| * |
| * @param signature |
| * A <i>ClassSignature</i>, <i>MethodTypeSignature</i>, or |
| * <i>FieldTypeSignature</i>. |
| */ |
| public SignatureReader(final String signature) { |
| this.signature = signature; |
| } |
| |
| /** |
| * Makes the given visitor visit the signature of this |
| * {@link SignatureReader}. This signature is the one specified in the |
| * constructor (see {@link #SignatureReader(String) SignatureReader}). This |
| * method is intended to be called on a {@link SignatureReader} that was |
| * created using a <i>ClassSignature</i> (such as the <code>signature</code> |
| * parameter of the {@link jdk.internal.org.objectweb.asm.ClassVisitor#visit |
| * ClassVisitor.visit} method) or a <i>MethodTypeSignature</i> (such as the |
| * <code>signature</code> parameter of the |
| * {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitMethod |
| * ClassVisitor.visitMethod} method). |
| * |
| * @param v |
| * the visitor that must visit this signature. |
| */ |
| public void accept(final SignatureVisitor v) { |
| String signature = this.signature; |
| int len = signature.length(); |
| int pos; |
| char c; |
| |
| if (signature.charAt(0) == '<') { |
| pos = 2; |
| do { |
| int end = signature.indexOf(':', pos); |
| v.visitFormalTypeParameter(signature.substring(pos - 1, end)); |
| pos = end + 1; |
| |
| c = signature.charAt(pos); |
| if (c == 'L' || c == '[' || c == 'T') { |
| pos = parseType(signature, pos, v.visitClassBound()); |
| } |
| |
| while ((c = signature.charAt(pos++)) == ':') { |
| pos = parseType(signature, pos, v.visitInterfaceBound()); |
| } |
| } while (c != '>'); |
| } else { |
| pos = 0; |
| } |
| |
| if (signature.charAt(pos) == '(') { |
| pos++; |
| while (signature.charAt(pos) != ')') { |
| pos = parseType(signature, pos, v.visitParameterType()); |
| } |
| pos = parseType(signature, pos + 1, v.visitReturnType()); |
| while (pos < len) { |
| pos = parseType(signature, pos + 1, v.visitExceptionType()); |
| } |
| } else { |
| pos = parseType(signature, pos, v.visitSuperclass()); |
| while (pos < len) { |
| pos = parseType(signature, pos, v.visitInterface()); |
| } |
| } |
| } |
| |
| /** |
| * Makes the given visitor visit the signature of this |
| * {@link SignatureReader}. This signature is the one specified in the |
| * constructor (see {@link #SignatureReader(String) SignatureReader}). This |
| * method is intended to be called on a {@link SignatureReader} that was |
| * created using a <i>FieldTypeSignature</i>, such as the |
| * <code>signature</code> parameter of the |
| * {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitField ClassVisitor.visitField} |
| * or {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitLocalVariable |
| * MethodVisitor.visitLocalVariable} methods. |
| * |
| * @param v |
| * the visitor that must visit this signature. |
| */ |
| public void acceptType(final SignatureVisitor v) { |
| parseType(this.signature, 0, v); |
| } |
| |
| /** |
| * Parses a field type signature and makes the given visitor visit it. |
| * |
| * @param signature |
| * a string containing the signature that must be parsed. |
| * @param pos |
| * index of the first character of the signature to parsed. |
| * @param v |
| * the visitor that must visit this signature. |
| * @return the index of the first character after the parsed signature. |
| */ |
| private static int parseType(final String signature, int pos, |
| final SignatureVisitor v) { |
| char c; |
| int start, end; |
| boolean visited, inner; |
| String name; |
| |
| switch (c = signature.charAt(pos++)) { |
| case 'Z': |
| case 'C': |
| case 'B': |
| case 'S': |
| case 'I': |
| case 'F': |
| case 'J': |
| case 'D': |
| case 'V': |
| v.visitBaseType(c); |
| return pos; |
| |
| case '[': |
| return parseType(signature, pos, v.visitArrayType()); |
| |
| case 'T': |
| end = signature.indexOf(';', pos); |
| v.visitTypeVariable(signature.substring(pos, end)); |
| return end + 1; |
| |
| default: // case 'L': |
| start = pos; |
| visited = false; |
| inner = false; |
| for (;;) { |
| switch (c = signature.charAt(pos++)) { |
| case '.': |
| case ';': |
| if (!visited) { |
| name = signature.substring(start, pos - 1); |
| if (inner) { |
| v.visitInnerClassType(name); |
| } else { |
| v.visitClassType(name); |
| } |
| } |
| if (c == ';') { |
| v.visitEnd(); |
| return pos; |
| } |
| start = pos; |
| visited = false; |
| inner = true; |
| break; |
| |
| case '<': |
| name = signature.substring(start, pos - 1); |
| if (inner) { |
| v.visitInnerClassType(name); |
| } else { |
| v.visitClassType(name); |
| } |
| visited = true; |
| top: for (;;) { |
| switch (c = signature.charAt(pos)) { |
| case '>': |
| break top; |
| case '*': |
| ++pos; |
| v.visitTypeArgument(); |
| break; |
| case '+': |
| case '-': |
| pos = parseType(signature, pos + 1, |
| v.visitTypeArgument(c)); |
| break; |
| default: |
| pos = parseType(signature, pos, |
| v.visitTypeArgument('=')); |
| break; |
| } |
| } |
| } |
| } |
| } |
| } |
| } |