org.apache.bcel.generic

Class BranchInstruction

java.lang.Object

org.apache.bcel.generic.Instruction

org.apache.bcel.generic.BranchInstruction

All Implemented Interfaces:

java.lang.Cloneable, InstructionTargeter

Direct Known Subclasses:

GotoInstruction, IfInstruction, JsrInstruction, Select

public abstract class BranchInstruction
extends Instruction
implements InstructionTargeter

Abstract super class for branching instructions like GOTO, IFEQ, etc.. Branch instructions may have a variable length, namely GOTO, JSR, LOOKUPSWITCH and TABLESWITCH.

See Also:

InstructionList

Method Summary

Modifier and Type	Method and Description
boolean	containsTarget(InstructionHandle ih) Checks whether this targeter targets the specified instruction handle.
void	dump(java.io.DataOutputStream out) Dump instruction as byte code to stream out.
int	getIndex()
InstructionHandle	getTarget()
void	setTarget(InstructionHandle target) Set branch target
java.lang.String	toString(boolean verbose) Long output format: <position in byte code> <name of opcode> "["<opcode number>"]" "("<length of instruction>")" "<"<target instruction>">" "@"<branch target offset>
void	updateTarget(InstructionHandle old_ih, InstructionHandle new_ih) Replaces the target of this targeter from this old handle to the new handle.

Methods inherited from class org.apache.bcel.generic.Instruction

accept, consumeStack, copy, equals, getComparator, getLength, getName, getOpcode, hashCode, isValidByte, isValidShort, produceStack, readInstruction, setComparator, toString, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Method Detail

dump

public void dump(java.io.DataOutputStream out)
          throws java.io.IOException

Dump instruction as byte code to stream out.

Overrides:

dump in class Instruction

Parameters:

out - Output stream

Throws:

java.io.IOException

toString

public java.lang.String toString(boolean verbose)

Long output format: <position in byte code> <name of opcode> "["<opcode number>"]" "("<length of instruction>")" "<"<target instruction>">" "@"<branch target offset>

Overrides:

toString in class Instruction

Parameters:

verbose - long/short format switch

Returns:

mnemonic for instruction

getIndex

public final int getIndex()

Returns:

target offset in byte code

getTarget

public InstructionHandle getTarget()

Returns:

target of branch instruction

setTarget

public void setTarget(InstructionHandle target)

Set branch target

Parameters:

target - branch target

updateTarget

public void updateTarget(InstructionHandle old_ih,
                         InstructionHandle new_ih)

Description copied from interface: InstructionTargeter

Replaces the target of this targeter from this old handle to the new handle.

Specified by:

updateTarget in interface InstructionTargeter

Parameters:

old_ih - old target

new_ih - new target

containsTarget

public boolean containsTarget(InstructionHandle ih)

Description copied from interface: InstructionTargeter

Checks whether this targeter targets the specified instruction handle.

Specified by:

containsTarget in interface InstructionTargeter

Returns:

true, if ih is target of this instruction