package org.aspectj.apache.bcel.generic;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
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* modification, are permitted provided that the following conditions
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*
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* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache BCEL" must not be used to endorse or promote products
* derived from this software without prior written permission. For
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* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import java.util.StringTokenizer;
import org.aspectj.apache.bcel.Constants;
import org.aspectj.apache.bcel.classfile.Constant;
import org.aspectj.apache.bcel.classfile.ConstantPool;
/**
* Super class for the INVOKExxx family of instructions.
*
* @version $Id: InvokeInstruction.java,v 1.6 2009/10/05 17:35:36 aclement Exp $
* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
*/
public class InvokeInstruction extends FieldOrMethod {
/**
* @param index to constant pool
*/
public InvokeInstruction(short opcode, int index) {
super(opcode, index);
}
/**
* @return mnemonic for instruction with symbolic references resolved
*/
public String toString(ConstantPool cp) {
Constant c = cp.getConstant(index);
StringTokenizer tok = new StringTokenizer(cp.constantToString(c));
return Constants.OPCODE_NAMES[opcode] + " " + tok.nextToken().replace('.', '/') + tok.nextToken();
}
/**
* Also works for instructions whose stack effect depends on the constant pool entry they reference.
*
* @return Number of words consumed from stack by this instruction
*/
public int consumeStack(ConstantPool cpg) {
String signature = getSignature(cpg);
int sum = Type.getArgumentSizes(signature);
if (opcode != Constants.INVOKESTATIC) {
sum += 1;
}
return sum;
}
/**
* Also works for instructions whose stack effect depends on the constant pool entry they reference.
*
* @return Number of words produced onto stack by this instruction
*/
public int produceStack(ConstantPool cpg) {
return getReturnType(cpg).getSize();
}
/**
* @return return type of referenced method.
*/
public Type getType(ConstantPool cpg) {
return getReturnType(cpg);
}
/**
* @return name of referenced method.
*/
public String getMethodName(ConstantPool cpg) {
return getName(cpg);
}
/**
* @return return type of referenced method.
*/
public Type getReturnType(ConstantPool cpg) {
return Type.getReturnType(getSignature(cpg));
}
/**
* @return argument types of referenced method.
*/
public Type[] getArgumentTypes(ConstantPool cpg) {
return Type.getArgumentTypes(getSignature(cpg));
}
}