jdk7u.jaxp.org.apache.bcel.external.generic

Class LocalVariableGen

java.lang.Object

jdk7u.jaxp.org.apache.bcel.external.generic.LocalVariableGen

All Implemented Interfaces:

Serializable, Cloneable, InstructionTargeter, NamedAndTyped

public class LocalVariableGen
extends Object
implements InstructionTargeter, NamedAndTyped, Cloneable, Serializable

This class represents a local variable within a method. It contains its scope, name and type. The generated LocalVariable object can be obtained with getLocalVariable which needs the instruction list and the constant pool as parameters.

Author:

M. Dahm

See Also:

LocalVariable, MethodGen, Serialized Form

Constructor Summary

Constructors

Constructor and Description
LocalVariableGen(int index, String name, Type type, InstructionHandle start, InstructionHandle end) Generate a local variable that with index `index'.

Method Summary

Methods

Modifier and Type	Method and Description
Object	clone()
boolean	containsTarget(InstructionHandle ih)
boolean	equals(Object o) We consider two local variables to be equal, if they use the same index and are valid in the same range.
InstructionHandle	getEnd()
int	getIndex()
LocalVariable	getLocalVariable(ConstantPoolGen cp) Get LocalVariable object.
String	getName()
InstructionHandle	getStart()
Type	getType()
int	hashCode()
void	setEnd(InstructionHandle end)
void	setName(String name)
void	setStart(InstructionHandle start)
void	setType(Type type)
String	toString()
void	updateTarget(InstructionHandle old_ih, InstructionHandle new_ih)

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LocalVariableGen

public LocalVariableGen(int index,
                String name,
                Type type,
                InstructionHandle start,
                InstructionHandle end)

Generate a local variable that with index `index'. Note that double and long variables need two indexs. Index indices have to be provided by the user.

Parameters:

index - index of local variable

name - its name

type - its type

start - from where the instruction is valid (null means from the start)

end - until where the instruction is valid (null means to the end)

Method Detail

getLocalVariable

public LocalVariable getLocalVariable(ConstantPoolGen cp)

Get LocalVariable object. This relies on that the instruction list has already been dumped to byte code or or that the `setPositions' methods has been called for the instruction list. Note that for local variables whose scope end at the last instruction of the method's code, the JVM specification is ambiguous: both a start_pc+length ending at the last instruction and start_pc+length ending at first index beyond the end of the code are valid.

Parameters:

il - instruction list (byte code) which this variable belongs to

cp - constant pool

getIndex

public int getIndex()

setName

public void setName(String name)

Specified by:

setName in interface NamedAndTyped

getName

public String getName()

Specified by:

getName in interface NamedAndTyped

setType

public void setType(Type type)

Specified by:

setType in interface NamedAndTyped

getType

public Type getType()

Specified by:

getType in interface NamedAndTyped

getStart

public InstructionHandle getStart()

getEnd

public InstructionHandle getEnd()

setStart

public final void setStart(InstructionHandle start)

setEnd

public final void setEnd(InstructionHandle end)

updateTarget

public void updateTarget(InstructionHandle old_ih,
                InstructionHandle new_ih)

Specified by:

updateTarget in interface InstructionTargeter

Parameters:

old_ih - old target, either start or end

new_ih - new target

containsTarget

public boolean containsTarget(InstructionHandle ih)

Specified by:

containsTarget in interface InstructionTargeter

Returns:

true, if ih is target of this variable

equals

public boolean equals(Object o)

We consider two local variables to be equal, if they use the same index and are valid in the same range.

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

clone

public Object clone()

Overrides:

clone in class Object