Package com.tonic.analysis.instruction

Class LookupSwitchInstruction

java.lang.Object

com.tonic.analysis.instruction.Instruction

com.tonic.analysis.instruction.LookupSwitchInstruction

public class LookupSwitchInstruction
extends Instruction

Represents the LOOKUPSWITCH instruction (0xAB).

Constructor Summary

Constructors

Constructor	Description
LookupSwitchInstruction(int opcode, int offset, int padding, int defaultOffset, int npairs, Map<Integer,Integer> matchOffsets)	Constructs a LookupSwitchInstruction.

Method Summary

Modifier and Type	Method	Description
void	accept(AbstractBytecodeVisitor visitor)	Accepts a visitor for bytecode analysis.
int	getDefaultOffset()
int	getLocalChange()	Returns the change in local variables caused by this instruction.
Map<Integer,Integer>	getMatchOffsets()
int	getNpairs()
int	getStackChange()	Returns the change in stack size caused by this instruction.
String	toString()	Returns a string representation of the instruction.
void	write(DataOutputStream dos)	Writes the LOOKUPSWITCH 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

LookupSwitchInstruction

public LookupSwitchInstruction(int opcode,
                               int offset,
                               int padding,
                               int defaultOffset,
                               int npairs,
                               Map<Integer,Integer> matchOffsets)

Constructs a LookupSwitchInstruction.

Parameters:

opcode - The opcode of the instruction.

offset - The bytecode offset of the instruction.

padding - The number of padding bytes.

defaultOffset - The default branch target offset.

npairs - The number of key-offset pairs.

matchOffsets - The map of keys to branch target offsets.

Method Detail

getDefaultOffset

public int getDefaultOffset()

Returns:

the default offset

getNpairs

public int getNpairs()

Returns:

the npairs

getMatchOffsets

public Map<Integer,Integer> getMatchOffsets()

Returns:

the match offsets

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 LOOKUPSWITCH 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 (pops one int).

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, default offset, number of pairs, and key-offset mappings.