| /* |
| * 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; |
| |
| import jdk.internal.org.objectweb.asm.Opcodes; |
| |
| /** |
| * A signature visitor that generates signatures in string format. |
| * |
| * @author Thomas Hallgren |
| * @author Eric Bruneton |
| */ |
| public class SignatureWriter extends SignatureVisitor { |
| |
| /** |
| * Builder used to construct the signature. |
| */ |
| private final StringBuilder buf = new StringBuilder(); |
| |
| /** |
| * Indicates if the signature contains formal type parameters. |
| */ |
| private boolean hasFormals; |
| |
| /** |
| * Indicates if the signature contains method parameter types. |
| */ |
| private boolean hasParameters; |
| |
| /** |
| * Stack used to keep track of class types that have arguments. Each element |
| * of this stack is a boolean encoded in one bit. The top of the stack is |
| * the lowest order bit. Pushing false = *2, pushing true = *2+1, popping = |
| * /2. |
| */ |
| private int argumentStack; |
| |
| /** |
| * Constructs a new {@link SignatureWriter} object. |
| */ |
| public SignatureWriter() { |
| super(Opcodes.ASM5); |
| } |
| |
| // ------------------------------------------------------------------------ |
| // Implementation of the SignatureVisitor interface |
| // ------------------------------------------------------------------------ |
| |
| @Override |
| public void visitFormalTypeParameter(final String name) { |
| if (!hasFormals) { |
| hasFormals = true; |
| buf.append('<'); |
| } |
| buf.append(name); |
| buf.append(':'); |
| } |
| |
| @Override |
| public SignatureVisitor visitClassBound() { |
| return this; |
| } |
| |
| @Override |
| public SignatureVisitor visitInterfaceBound() { |
| buf.append(':'); |
| return this; |
| } |
| |
| @Override |
| public SignatureVisitor visitSuperclass() { |
| endFormals(); |
| return this; |
| } |
| |
| @Override |
| public SignatureVisitor visitInterface() { |
| return this; |
| } |
| |
| @Override |
| public SignatureVisitor visitParameterType() { |
| endFormals(); |
| if (!hasParameters) { |
| hasParameters = true; |
| buf.append('('); |
| } |
| return this; |
| } |
| |
| @Override |
| public SignatureVisitor visitReturnType() { |
| endFormals(); |
| if (!hasParameters) { |
| buf.append('('); |
| } |
| buf.append(')'); |
| return this; |
| } |
| |
| @Override |
| public SignatureVisitor visitExceptionType() { |
| buf.append('^'); |
| return this; |
| } |
| |
| @Override |
| public void visitBaseType(final char descriptor) { |
| buf.append(descriptor); |
| } |
| |
| @Override |
| public void visitTypeVariable(final String name) { |
| buf.append('T'); |
| buf.append(name); |
| buf.append(';'); |
| } |
| |
| @Override |
| public SignatureVisitor visitArrayType() { |
| buf.append('['); |
| return this; |
| } |
| |
| @Override |
| public void visitClassType(final String name) { |
| buf.append('L'); |
| buf.append(name); |
| argumentStack *= 2; |
| } |
| |
| @Override |
| public void visitInnerClassType(final String name) { |
| endArguments(); |
| buf.append('.'); |
| buf.append(name); |
| argumentStack *= 2; |
| } |
| |
| @Override |
| public void visitTypeArgument() { |
| if (argumentStack % 2 == 0) { |
| ++argumentStack; |
| buf.append('<'); |
| } |
| buf.append('*'); |
| } |
| |
| @Override |
| public SignatureVisitor visitTypeArgument(final char wildcard) { |
| if (argumentStack % 2 == 0) { |
| ++argumentStack; |
| buf.append('<'); |
| } |
| if (wildcard != '=') { |
| buf.append(wildcard); |
| } |
| return this; |
| } |
| |
| @Override |
| public void visitEnd() { |
| endArguments(); |
| buf.append(';'); |
| } |
| |
| /** |
| * Returns the signature that was built by this signature writer. |
| * |
| * @return the signature that was built by this signature writer. |
| */ |
| @Override |
| public String toString() { |
| return buf.toString(); |
| } |
| |
| // ------------------------------------------------------------------------ |
| // Utility methods |
| // ------------------------------------------------------------------------ |
| |
| /** |
| * Ends the formal type parameters section of the signature. |
| */ |
| private void endFormals() { |
| if (hasFormals) { |
| hasFormals = false; |
| buf.append('>'); |
| } |
| } |
| |
| /** |
| * Ends the type arguments of a class or inner class type. |
| */ |
| private void endArguments() { |
| if (argumentStack % 2 != 0) { |
| buf.append('>'); |
| } |
| argumentStack /= 2; |
| } |
| } |