/*
* Copyright (c) 2011 - Georgios Gousios <gousiosg@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* 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 gr.gousiosg.javacg.stat;
import org.apache.bcel.classfile.JavaClass;
import org.apache.bcel.generic.*;
/**
* The simplest of method visitors, prints any invoked method
* signature for all method invocations.
*
* Class copied with modifications from CJKM: http://www.spinellis.gr/sw/ckjm/
*/
public class MethodVisitor extends EmptyVisitor {
JavaClass visitedClass;
private MethodGen mg;
private ConstantPoolGen cp;
private String format;
public MethodVisitor(MethodGen m, JavaClass jc) {
visitedClass = jc;
mg = m;
cp = mg.getConstantPool();
format = "M:" + visitedClass.getClassName() + ":" + mg.getName() + "(" + argumentList(mg.getArgumentTypes()) + ")"
+ " " + "(%s)%s:%s(%s)";
}
private String argumentList(Type[] arguments) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < arguments.length; i++) {
if (i != 0) {
sb.append(",");
}
sb.append(arguments[i].toString());
}
return sb.toString();
}
public void start() {
if (mg.isAbstract() || mg.isNative())
return;
for (InstructionHandle ih = mg.getInstructionList().getStart();
ih != null; ih = ih.getNext()) {
Instruction i = ih.getInstruction();
if (!visitInstruction(i))
i.accept(this);
}
}
private boolean visitInstruction(Instruction i) {
short opcode = i.getOpcode();
return ((InstructionConst.getInstruction(opcode) != null)
&& !(i instanceof ConstantPushInstruction)
&& !(i instanceof ReturnInstruction));
}
@Override
public void visitINVOKEVIRTUAL(INVOKEVIRTUAL i) {
System.out.println(String.format(format,"M",i.getReferenceType(cp),i.getMethodName(cp),argumentList(i.getArgumentTypes(cp))));
}
@Override
public void visitINVOKEINTERFACE(INVOKEINTERFACE i) {
System.out.println(String.format(format,"I",i.getReferenceType(cp),i.getMethodName(cp),argumentList(i.getArgumentTypes(cp))));
}
@Override
public void visitINVOKESPECIAL(INVOKESPECIAL i) {
System.out.println(String.format(format,"O",i.getReferenceType(cp),i.getMethodName(cp),argumentList(i.getArgumentTypes(cp))));
}
@Override
public void visitINVOKESTATIC(INVOKESTATIC i) {
System.out.println(String.format(format,"S",i.getReferenceType(cp),i.getMethodName(cp),argumentList(i.getArgumentTypes(cp))));
}
@Override
public void visitINVOKEDYNAMIC(INVOKEDYNAMIC i) {
System.out.println(String.format(format,"D",i.getType(cp),i.getMethodName(cp),
argumentList(i.getArgumentTypes(cp))));
}
}