Package org.apache.bcel.classfile

Class LocalVariableTable

java.lang.Object

org.apache.bcel.classfile.Attribute

org.apache.bcel.classfile.LocalVariableTable

All Implemented Interfaces:

java.lang.Cloneable, java.lang.Iterable<LocalVariable>, Node

public class LocalVariableTable
extends Attribute
implements java.lang.Iterable<LocalVariable>

This class represents colection of local variables in a method. This attribute is contained in the Code attribute.

See Also:

Code, LocalVariable

Field Summary

Fields inherited from class org.apache.bcel.classfile.Attribute

constant_pool, length, name_index, tag

Constructor Summary

Constructors

Constructor	Description
LocalVariableTable(int nameIndex, int length, LocalVariable[] localVariableTable, ConstantPool constantPool)	Constructs a new LocalVariableTable.
LocalVariableTable(LocalVariableTable c)	Initialize from another object.

Method Summary

Modifier and Type	Method	Description
void	accept(Visitor v)	Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
Attribute	copy(ConstantPool constantPool)	Creates a deep copy of this attribute.
void	dump(java.io.DataOutputStream file)	Dumps local variable table attribute to file stream in binary format.
LocalVariable	getLocalVariable(int index)	Deprecated. Since 5.2 because multiple variables can share the same slot, use getLocalVariable(int index, int pc) instead.
LocalVariable	getLocalVariable(int index, int pc)	Gets the local variable for the given index and program counter.
LocalVariable[]	getLocalVariableTable()	Gets the local variable table.
int	getTableLength()	Gets the table length.
java.util.Iterator<LocalVariable>	iterator()
void	setLocalVariableTable(LocalVariable[] localVariableTable)	Sets the local variable table.
java.lang.String	toString()

Methods inherited from class org.apache.bcel.classfile.Attribute

addAttributeReader, addAttributeReader, clone, getConstantPool, getLength, getName, getNameIndex, getTag, println, readAttribute, readAttribute, removeAttributeReader, setConstantPool, setLength, setNameIndex

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

LocalVariableTable

public LocalVariableTable(int nameIndex,
                          int length,
                          LocalVariable[] localVariableTable,
                          ConstantPool constantPool)

Constructs a new LocalVariableTable.

Parameters:

nameIndex - Index in constant pool to 'LocalVariableTable'.

length - Content length in bytes.

localVariableTable - Table of local variables.

constantPool - Array of constants.

LocalVariableTable

public LocalVariableTable(LocalVariableTable c)

Initialize from another object. Note that both objects use the same references (shallow copy). Use copy() for a physical copy.

Parameters:

c - Source to copy.

Method Detail

accept

public void accept(Visitor v)

Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class. I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.

Specified by:

accept in interface Node

Specified by:

accept in class Attribute

Parameters:

v - Visitor object.

copy

public Attribute copy(ConstantPool constantPool)

Description copied from class: Attribute

Creates a deep copy of this attribute.

Specified by:

copy in class Attribute

Parameters:

constantPool - constant pool to save.

Returns:

deep copy of this attribute.

dump

public final void dump(java.io.DataOutputStream file)
                throws java.io.IOException

Dumps local variable table attribute to file stream in binary format.

Overrides:

dump in class Attribute

Parameters:

file - Output file stream.

Throws:

java.io.IOException - Thrown if an I/O error occurs.

getLocalVariable

@Deprecated
public final LocalVariable getLocalVariable(int index)

Deprecated.

Since 5.2 because multiple variables can share the same slot, use getLocalVariable(int index, int pc) instead.

Gets the local variable for the given index.

Parameters:

index - The variable slot.

Returns:

The first LocalVariable that matches the slot or null if not found.

getLocalVariable

public final LocalVariable getLocalVariable(int index,
                                            int pc)

Gets the local variable for the given index and program counter.

Parameters:

index - The variable slot.

pc - The current pc that this variable is alive.

Returns:

The LocalVariable that matches or null if not found.

getLocalVariableTable

public final LocalVariable[] getLocalVariableTable()

Gets the local variable table.

Returns:

Array of local variables of method.

getTableLength

public final int getTableLength()

Gets the table length.

Returns:

The table length.

iterator

public java.util.Iterator<LocalVariable> iterator()

Specified by:

iterator in interface java.lang.Iterable<LocalVariable>

setLocalVariableTable

public final void setLocalVariableTable(LocalVariable[] localVariableTable)

Sets the local variable table.

Parameters:

localVariableTable - The local variable table to set.

toString

public final java.lang.String toString()

Overrides:

toString in class Attribute

Returns:

String representation.