jef.dna.instructions.impl
Class Ifeq

java.lang.Object
  jef.dna.instructions.impl.InstructionAncestor
      jef.dna.instructions.impl.Ifeq

All Implemented Interfaces:

java.lang.Cloneable, Instruction, BytesCountable

Direct Known Subclasses:

Ifge, Ifgt, Ifle, Iflt, Ifne

public class Ifeq
extends InstructionAncestor

This class maps the IFEQ bytecode instruction which branches to the offset obtained starting from the two required operands, if and only if the value popped from the operand stack equals 0. This value has to be of type int and the comparison is an int comparison.

Author:

Francesco Russo (frusso@cs.unibo.it)

Field Summary

Fields inherited from class jef.dna.instructions.impl.InstructionAncestor

logger, opCode, operands, operandsCount

Constructor Summary

Ifeq()
Creates a new instance of Ifeq

Method Summary

int	updateRefs(int offset) This method must implement the logic necessary to update all the references to constant pool table's entries contained within the bytecode instruction.

Methods inherited from class jef.dna.instructions.impl.InstructionAncestor

clone, fromArray, getBytesCount, getOpCode, getOperands, getOperandsCount, setOpCode, setOperands, setOperandsCountPosticipated, toArray

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Ifeq

public Ifeq()

Creates a new instance of Ifeq

Method Detail

updateRefs

public int updateRefs(int offset)

This method must implement the logic necessary to update all the references to constant pool table's entries contained within the bytecode instruction.

Specified by:

updateRefs in interface Instruction

Overrides:

updateRefs in class InstructionAncestor

Parameters:

offset - The offset used for updating expressed as number of cpt's entries to be skipped

Returns:

int The number of processed words within the current bytecode instruction