Package org.apache.bcel.classfile

Class LineNumberTable

java.lang.Object

org.apache.bcel.classfile.Attribute

org.apache.bcel.classfile.LineNumberTable

All Implemented Interfaces:

Cloneable, Iterable<LineNumber>, Node

public final class LineNumberTable
extends Attribute
implements Iterable<LineNumber>

This class represents a table of line numbers for debugging purposes. This attribute is used by the Code attribute. It contains pairs of PCs and line numbers.

See Also:

• Code
• LineNumber

Field Summary

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

constant_pool, EMPTY_ARRAY, length, name_index, tag

Constructor Summary

Constructors

Constructor	Description
LineNumberTable(int nameIndex, int length, LineNumber[] lineNumberTable, ConstantPool constantPool)	Constructs a new instance.
LineNumberTable(LineNumberTable c)	Constructs a new instance from another.

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)
void	dump(DataOutputStream file)	Dump line number table attribute to file stream in binary format.
LineNumber[]	getLineNumberTable()
int	getSourceLine(int pos)	Map byte code positions to source code lines.
int	getTableLength()
Iterator<LineNumber>	iterator()
void	setLineNumberTable(LineNumber[] lineNumberTable)
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 Details

LineNumberTable

public LineNumberTable(int nameIndex,
 int length,
 LineNumber[] lineNumberTable,
 ConstantPool constantPool)

Constructs a new instance.

Parameters:

nameIndex - Index of name

length - Content length in bytes

lineNumberTable - Table of line/numbers pairs

constantPool - Array of constants

LineNumberTable

public LineNumberTable(LineNumberTable c)

Constructs a new instance from another.

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

Method Details

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)

Specified by:

copy in class Attribute

Parameters:

constantPool - constant pool to save.

Returns:

deep copy of this attribute

dump

public void dump(DataOutputStream file)
          throws IOException

Dump line number table attribute to file stream in binary format.

Overrides:

dump in class Attribute

Parameters:

file - Output file stream

Throws:

IOException - if an I/O Exception occurs in writeShort

getLineNumberTable

public LineNumber[] getLineNumberTable()

Returns:

Array of (pc offset, line number) pairs.

getSourceLine

public int getSourceLine(int pos)

Map byte code positions to source code lines.

Parameters:

pos - byte code offset

Returns:

corresponding line in source code

getTableLength

public int getTableLength()

iterator

public Iterator<LineNumber> iterator()

Specified by:

iterator in interface Iterable<LineNumber>

setLineNumberTable

public void setLineNumberTable(LineNumber[] lineNumberTable)

Parameters:

lineNumberTable - the line number entries for this table

toString

public String toString()

Overrides:

toString in class Attribute

Returns:

String representation.