| /*** |
| * 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 org.apache.tajo.org.objectweb.asm.util; |
| |
| import org.apache.tajo.org.objectweb.asm.Opcodes; |
| import org.apache.tajo.org.objectweb.asm.signature.SignatureVisitor; |
| |
| /** |
| * A {@link SignatureVisitor} that prints a disassembled view of the signature |
| * it visits. |
| * |
| * @author Eugene Kuleshov |
| * @author Eric Bruneton |
| */ |
| public final class TraceSignatureVisitor extends SignatureVisitor { |
| |
| private final StringBuffer declaration; |
| |
| private boolean isInterface; |
| |
| private boolean seenFormalParameter; |
| |
| private boolean seenInterfaceBound; |
| |
| private boolean seenParameter; |
| |
| private boolean seenInterface; |
| |
| private StringBuffer returnType; |
| |
| private StringBuffer exceptions; |
| |
| /** |
| * 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; |
| |
| /** |
| * Stack used to keep track of array class types. 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 arrayStack; |
| |
| private String separator = ""; |
| |
| public TraceSignatureVisitor(final int access) { |
| super(Opcodes.ASM4); |
| isInterface = (access & Opcodes.ACC_INTERFACE) != 0; |
| this.declaration = new StringBuffer(); |
| } |
| |
| private TraceSignatureVisitor(final StringBuffer buf) { |
| super(Opcodes.ASM4); |
| this.declaration = buf; |
| } |
| |
| @Override |
| public void visitFormalTypeParameter(final String name) { |
| declaration.append(seenFormalParameter ? ", " : "<").append(name); |
| seenFormalParameter = true; |
| seenInterfaceBound = false; |
| } |
| |
| @Override |
| public SignatureVisitor visitClassBound() { |
| separator = " extends "; |
| startType(); |
| return this; |
| } |
| |
| @Override |
| public SignatureVisitor visitInterfaceBound() { |
| separator = seenInterfaceBound ? ", " : " extends "; |
| seenInterfaceBound = true; |
| startType(); |
| return this; |
| } |
| |
| @Override |
| public SignatureVisitor visitSuperclass() { |
| endFormals(); |
| separator = " extends "; |
| startType(); |
| return this; |
| } |
| |
| @Override |
| public SignatureVisitor visitInterface() { |
| separator = seenInterface ? ", " : isInterface ? " extends " |
| : " implements "; |
| seenInterface = true; |
| startType(); |
| return this; |
| } |
| |
| @Override |
| public SignatureVisitor visitParameterType() { |
| endFormals(); |
| if (seenParameter) { |
| declaration.append(", "); |
| } else { |
| seenParameter = true; |
| declaration.append('('); |
| } |
| startType(); |
| return this; |
| } |
| |
| @Override |
| public SignatureVisitor visitReturnType() { |
| endFormals(); |
| if (seenParameter) { |
| seenParameter = false; |
| } else { |
| declaration.append('('); |
| } |
| declaration.append(')'); |
| returnType = new StringBuffer(); |
| return new TraceSignatureVisitor(returnType); |
| } |
| |
| @Override |
| public SignatureVisitor visitExceptionType() { |
| if (exceptions == null) { |
| exceptions = new StringBuffer(); |
| } else { |
| exceptions.append(", "); |
| } |
| // startType(); |
| return new TraceSignatureVisitor(exceptions); |
| } |
| |
| @Override |
| public void visitBaseType(final char descriptor) { |
| switch (descriptor) { |
| case 'V': |
| declaration.append("void"); |
| break; |
| case 'B': |
| declaration.append("byte"); |
| break; |
| case 'J': |
| declaration.append("long"); |
| break; |
| case 'Z': |
| declaration.append("boolean"); |
| break; |
| case 'I': |
| declaration.append("int"); |
| break; |
| case 'S': |
| declaration.append("short"); |
| break; |
| case 'C': |
| declaration.append("char"); |
| break; |
| case 'F': |
| declaration.append("float"); |
| break; |
| // case 'D': |
| default: |
| declaration.append("double"); |
| break; |
| } |
| endType(); |
| } |
| |
| @Override |
| public void visitTypeVariable(final String name) { |
| declaration.append(name); |
| endType(); |
| } |
| |
| @Override |
| public SignatureVisitor visitArrayType() { |
| startType(); |
| arrayStack |= 1; |
| return this; |
| } |
| |
| @Override |
| public void visitClassType(final String name) { |
| if ("java/lang/Object".equals(name)) { |
| // Map<java.lang.Object,java.util.List> |
| // or |
| // abstract public V get(Object key); (seen in Dictionary.class) |
| // should have Object |
| // but java.lang.String extends java.lang.Object is unnecessary |
| boolean needObjectClass = argumentStack % 2 != 0 || seenParameter; |
| if (needObjectClass) { |
| declaration.append(separator).append(name.replace('/', '.')); |
| } |
| } else { |
| declaration.append(separator).append(name.replace('/', '.')); |
| } |
| separator = ""; |
| argumentStack *= 2; |
| } |
| |
| @Override |
| public void visitInnerClassType(final String name) { |
| if (argumentStack % 2 != 0) { |
| declaration.append('>'); |
| } |
| argumentStack /= 2; |
| declaration.append('.'); |
| declaration.append(separator).append(name.replace('/', '.')); |
| separator = ""; |
| argumentStack *= 2; |
| } |
| |
| @Override |
| public void visitTypeArgument() { |
| if (argumentStack % 2 == 0) { |
| ++argumentStack; |
| declaration.append('<'); |
| } else { |
| declaration.append(", "); |
| } |
| declaration.append('?'); |
| } |
| |
| @Override |
| public SignatureVisitor visitTypeArgument(final char tag) { |
| if (argumentStack % 2 == 0) { |
| ++argumentStack; |
| declaration.append('<'); |
| } else { |
| declaration.append(", "); |
| } |
| |
| if (tag == EXTENDS) { |
| declaration.append("? extends "); |
| } else if (tag == SUPER) { |
| declaration.append("? super "); |
| } |
| |
| startType(); |
| return this; |
| } |
| |
| @Override |
| public void visitEnd() { |
| if (argumentStack % 2 != 0) { |
| declaration.append('>'); |
| } |
| argumentStack /= 2; |
| endType(); |
| } |
| |
| public String getDeclaration() { |
| return declaration.toString(); |
| } |
| |
| public String getReturnType() { |
| return returnType == null ? null : returnType.toString(); |
| } |
| |
| public String getExceptions() { |
| return exceptions == null ? null : exceptions.toString(); |
| } |
| |
| // ----------------------------------------------- |
| |
| private void endFormals() { |
| if (seenFormalParameter) { |
| declaration.append('>'); |
| seenFormalParameter = false; |
| } |
| } |
| |
| private void startType() { |
| arrayStack *= 2; |
| } |
| |
| private void endType() { |
| if (arrayStack % 2 == 0) { |
| arrayStack /= 2; |
| } else { |
| while (arrayStack % 2 != 0) { |
| arrayStack /= 2; |
| declaration.append("[]"); |
| } |
| } |
| } |
| } |