/*** | |
* 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.signature; | |
/** | |
* A signature visitor that generates signatures in string format. | |
* | |
* @author Thomas Hallgren | |
* @author Eric Bruneton | |
*/ | |
public class SignatureWriter implements SignatureVisitor { | |
/** | |
* Buffer used to construct the signature. | |
*/ | |
private final StringBuffer buf = new StringBuffer(); | |
/** | |
* 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() { | |
} | |
// ------------------------------------------------------------------------ | |
// Implementation of the SignatureVisitor interface | |
// ------------------------------------------------------------------------ | |
public void visitFormalTypeParameter(final String name) { | |
if (!hasFormals) { | |
hasFormals = true; | |
buf.append('<'); | |
} | |
buf.append(name); | |
buf.append(':'); | |
} | |
public SignatureVisitor visitClassBound() { | |
return this; | |
} | |
public SignatureVisitor visitInterfaceBound() { | |
buf.append(':'); | |
return this; | |
} | |
public SignatureVisitor visitSuperclass() { | |
endFormals(); | |
return this; | |
} | |
public SignatureVisitor visitInterface() { | |
return this; | |
} | |
public SignatureVisitor visitParameterType() { | |
endFormals(); | |
if (!hasParameters) { | |
hasParameters = true; | |
buf.append('('); | |
} | |
return this; | |
} | |
public SignatureVisitor visitReturnType() { | |
endFormals(); | |
if (!hasParameters) { | |
buf.append('('); | |
} | |
buf.append(')'); | |
return this; | |
} | |
public SignatureVisitor visitExceptionType() { | |
buf.append('^'); | |
return this; | |
} | |
public void visitBaseType(final char descriptor) { | |
buf.append(descriptor); | |
} | |
public void visitTypeVariable(final String name) { | |
buf.append('T'); | |
buf.append(name); | |
buf.append(';'); | |
} | |
public SignatureVisitor visitArrayType() { | |
buf.append('['); | |
return this; | |
} | |
public void visitClassType(final String name) { | |
buf.append('L'); | |
buf.append(name); | |
argumentStack *= 2; | |
} | |
public void visitInnerClassType(final String name) { | |
endArguments(); | |
buf.append('.'); | |
buf.append(name); | |
argumentStack *= 2; | |
} | |
public void visitTypeArgument() { | |
if (argumentStack % 2 == 0) { | |
++argumentStack; | |
buf.append('<'); | |
} | |
buf.append('*'); | |
} | |
public SignatureVisitor visitTypeArgument(final char wildcard) { | |
if (argumentStack % 2 == 0) { | |
++argumentStack; | |
buf.append('<'); | |
} | |
if (wildcard != '=') { | |
buf.append(wildcard); | |
} | |
return this; | |
} | |
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. | |
*/ | |
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; | |
} | |
} |