Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> bcel >> [ generic overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

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, java.io.Serializable

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.

Version:

$Id: BranchInstruction.java 386056 2006-03-15 11:31:56Z tcurdt $

---

Field Summary
protected  int	index
protected  int	position
protected  InstructionHandle	target

 

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

length, opcode

 

Constructor Summary
(package private)	BranchInstruction()           Empty constructor needed for the Class.newInstance() statement in Instruction.readInstruction().
protected	BranchInstruction(short opcode, InstructionHandle target)           Common super constructor

 

Method Summary
boolean	containsTarget(InstructionHandle ih)
(package private)  void	dispose()           Inform target that it's not targeted anymore.
void	dump(java.io.DataOutputStream out)           Dump instruction as byte code to stream out.
int	getIndex()
InstructionHandle	getTarget()
protected  int	getTargetOffset()
protected  int	getTargetOffset(InstructionHandle _target)
protected  void	initFromFile(org.apache.bcel.util.ByteSequence bytes, boolean wide)           Read needed data (e.g.
(package private) static void	notifyTarget(InstructionHandle old_ih, InstructionHandle new_ih, InstructionTargeter t)           Used by BranchInstruction, LocalVariableGen, CodeExceptionGen
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>
protected  int	updatePosition(int offset, int max_offset)           Called by InstructionList.setPositions when setting the position for every instruction.
void	updateTarget(InstructionHandle old_ih, InstructionHandle new_ih)

 

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

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

 

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

 

Field Detail

index

protected int index

---

target

protected InstructionHandle target

---

position

protected int position

Constructor Detail

BranchInstruction

BranchInstruction()

Empty constructor needed for the Class.newInstance() statement in Instruction.readInstruction(). Not to be used otherwise.

---

BranchInstruction

protected BranchInstruction(short opcode,
                            InstructionHandle target)

Common super constructor

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

---

getTargetOffset

protected int getTargetOffset(InstructionHandle _target)

---

getTargetOffset

protected int getTargetOffset()

---

updatePosition

protected int updatePosition(int offset,
                             int max_offset)

Called by InstructionList.setPositions when setting the position for every instruction. In the presence of variable length instructions `setPositions' performs multiple passes over the instruction list to calculate the correct (byte) positions and offsets by calling this function.

---

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

---

initFromFile

protected void initFromFile(org.apache.bcel.util.ByteSequence bytes,
                            boolean wide)
                     throws java.io.IOException

Read needed data (e.g. index) from file. Conversion to a InstructionHandle is done in InstructionList(byte[]).

Overrides:

initFromFile in class Instruction

---

getIndex

public final int getIndex()

---

getTarget

public InstructionHandle getTarget()

---

setTarget

public void setTarget(InstructionHandle target)

Set branch target

---

notifyTarget

static final void notifyTarget(InstructionHandle old_ih,
                               InstructionHandle new_ih,
                               InstructionTargeter t)

Used by BranchInstruction, LocalVariableGen, CodeExceptionGen

---

updateTarget

public void updateTarget(InstructionHandle old_ih,
                         InstructionHandle new_ih)

Specified by:

updateTarget in interface InstructionTargeter

---

containsTarget

public boolean containsTarget(InstructionHandle ih)

Specified by:

containsTarget in interface InstructionTargeter

---

dispose

void dispose()

Inform target that it's not targeted anymore.

Overrides:

dispose in class Instruction

---

Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> bcel >> [ generic overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---