org.apache.bcel.generic

Class LocalVariableInstruction

java.lang.Object

org.apache.bcel.generic.Instruction

org.apache.bcel.generic.LocalVariableInstruction

All Implemented Interfaces:

java.lang.Cloneable, IndexedInstruction, TypedInstruction

Direct Known Subclasses:

IINC, LoadInstruction, StoreInstruction

public abstract class LocalVariableInstruction
extends Instruction
implements TypedInstruction, IndexedInstruction

Abstract super class for instructions dealing with local variables.

Method Summary

Modifier and Type	Method and Description
void	dump(java.io.DataOutputStream out) Dump instruction as byte code to stream out.
short	getCanonicalTag()
int	getIndex()
Type	getType(ConstantPoolGen cp) Returns the type associated with the instruction - in case of ALOAD or ASTORE Type.OBJECT is returned.
void	setIndex(int n) Set the local variable index.
java.lang.String	toString(boolean verbose) Long output format: <name of opcode> "["<opcode number>"]" "("<length of instruction>")" "<"< local variable index>">"

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: <name of opcode> "["<opcode number>"]" "("<length of instruction>")" "<"< local variable index>">"

Overrides:

toString in class Instruction

Parameters:

verbose - long/short format switch

Returns:

mnemonic for instruction

getIndex

public final int getIndex()

Specified by:

getIndex in interface IndexedInstruction

Returns:

local variable index (n) referred by this instruction.

setIndex

public void setIndex(int n)

Set the local variable index. also updates opcode and length TODO Why?

Specified by:

setIndex in interface IndexedInstruction

See Also:

setIndexOnly(int)

getCanonicalTag

public short getCanonicalTag()

Returns:

canonical tag for instruction, e.g., ALOAD for ALOAD_0

getType

public Type getType(ConstantPoolGen cp)

Returns the type associated with the instruction - in case of ALOAD or ASTORE Type.OBJECT is returned. This is just a bit incorrect, because ALOAD and ASTORE may work on every ReferenceType (including Type.NULL) and ASTORE may even work on a ReturnaddressType .

Specified by:

getType in interface TypedInstruction

Returns:

type associated with the instruction