Package com.tonic.analysis.instruction

Class IIncInstruction

java.lang.Object

com.tonic.analysis.instruction.Instruction

com.tonic.analysis.instruction.IIncInstruction

All Implemented Interfaces:

LocalVarInstruction

public class IIncInstruction
extends Instruction
implements LocalVarInstruction

Represents the JVM IINC instruction.

Constructor Summary

Constructors

Constructor	Description
IIncInstruction(int opcode, int offset, int varIndex, int constValue)	Constructs an IIncInstruction.

Method Summary

Modifier and Type	Method	Description
void	accept(AbstractBytecodeVisitor visitor)	Accepts a visitor for bytecode analysis.
int	getConstValue()
int	getLocalChange()	Returns the change in local variables caused by this instruction.
int	getStackChange()	Returns the change in stack size caused by this instruction.
int	getVarIndex()
String	toString()	Returns a string representation of the instruction.
void	write(DataOutputStream dos)	Writes the IINC opcode and its operands to the DataOutputStream.

Methods inherited from class com.tonic.analysis.instruction.Instruction

getLength, getOffset, getOpcode, setOffset

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

IIncInstruction

public IIncInstruction(int opcode,
                       int offset,
                       int varIndex,
                       int constValue)

Constructs an IIncInstruction.

Parameters:

opcode - The opcode of the instruction.

offset - The bytecode offset of the instruction.

varIndex - The index of the local variable to increment.

constValue - The constant value to add to the local variable.

Method Detail

getVarIndex

public int getVarIndex()

Specified by:

getVarIndex in interface LocalVarInstruction

Returns:

the var index

getConstValue

public int getConstValue()

Returns:

the const value

accept

public void accept(AbstractBytecodeVisitor visitor)

Description copied from class: Instruction

Accepts a visitor for bytecode analysis.

Specified by:

accept in class Instruction

Parameters:

visitor - The visitor to accept.

write

public void write(DataOutputStream dos)
           throws IOException

Writes the IINC opcode and its operands to the DataOutputStream.

Specified by:

write in class Instruction

Parameters:

dos - The DataOutputStream to write to.

Throws:

IOException - If an I/O error occurs.

getStackChange

public int getStackChange()

Returns the change in stack size caused by this instruction.

Specified by:

getStackChange in class Instruction

Returns:

The stack size change (none).

getLocalChange

public int getLocalChange()

Returns the change in local variables caused by this instruction.

Specified by:

getLocalChange in class Instruction

Returns:

The local variables size change (none).

toString

public String toString()

Returns a string representation of the instruction.

Overrides:

toString in class Instruction

Returns:

The mnemonic, variable index, and constant value.