/*** | |
* ASM: a very small and fast Java bytecode manipulation framework | |
* Copyright (c) 2000-2007 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.mockito.asm.util; | |
import org.mockito.asm.Opcodes; | |
import org.mockito.asm.signature.SignatureVisitor; | |
/** | |
* A {@link SignatureVisitor} that prints a disassembled view of the signature | |
* it visits. | |
* | |
* @author Eugene Kuleshov | |
* @author Eric Bruneton | |
*/ | |
public class TraceSignatureVisitor implements 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) { | |
isInterface = (access & Opcodes.ACC_INTERFACE) != 0; | |
this.declaration = new StringBuffer(); | |
} | |
private TraceSignatureVisitor(final StringBuffer buf) { | |
this.declaration = buf; | |
} | |
public void visitFormalTypeParameter(final String name) { | |
declaration.append(seenFormalParameter ? ", " : "<").append(name); | |
seenFormalParameter = true; | |
seenInterfaceBound = false; | |
} | |
public SignatureVisitor visitClassBound() { | |
separator = " extends "; | |
startType(); | |
return this; | |
} | |
public SignatureVisitor visitInterfaceBound() { | |
separator = seenInterfaceBound ? ", " : " extends "; | |
seenInterfaceBound = true; | |
startType(); | |
return this; | |
} | |
public SignatureVisitor visitSuperclass() { | |
endFormals(); | |
separator = " extends "; | |
startType(); | |
return this; | |
} | |
public SignatureVisitor visitInterface() { | |
separator = seenInterface ? ", " : isInterface | |
? " extends " | |
: " implements "; | |
seenInterface = true; | |
startType(); | |
return this; | |
} | |
public SignatureVisitor visitParameterType() { | |
endFormals(); | |
if (seenParameter) { | |
declaration.append(", "); | |
} else { | |
seenParameter = true; | |
declaration.append('('); | |
} | |
startType(); | |
return this; | |
} | |
public SignatureVisitor visitReturnType() { | |
endFormals(); | |
if (seenParameter) { | |
seenParameter = false; | |
} else { | |
declaration.append('('); | |
} | |
declaration.append(')'); | |
returnType = new StringBuffer(); | |
return new TraceSignatureVisitor(returnType); | |
} | |
public SignatureVisitor visitExceptionType() { | |
if (exceptions == null) { | |
exceptions = new StringBuffer(); | |
} else { | |
exceptions.append(", "); | |
} | |
// startType(); | |
return new TraceSignatureVisitor(exceptions); | |
} | |
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(); | |
} | |
public void visitTypeVariable(final String name) { | |
declaration.append(name); | |
endType(); | |
} | |
public SignatureVisitor visitArrayType() { | |
startType(); | |
arrayStack |= 1; | |
return this; | |
} | |
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; | |
} | |
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; | |
} | |
public void visitTypeArgument() { | |
if (argumentStack % 2 == 0) { | |
++argumentStack; | |
declaration.append('<'); | |
} else { | |
declaration.append(", "); | |
} | |
declaration.append('?'); | |
} | |
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; | |
} | |
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("[]"); | |
} | |
} | |
} | |
} |