com.day.util.diff

Class Hunk

java.lang.Object

com.day.util.diff.Hunk

public class Hunk
extends java.lang.Object

A hunk records a block of diff between the left and the right document. it represents either a insertion, deletion, change or identity. several hunks are chained in a linked list.

Field Summary

Fields

Modifier and Type	Field and Description
static int	CHANGED type indicates a changed block
static int	DELETED type indicates a deleted block
static int	INSERTED type indicates an inserted block
Range	left the range in the left document
Range	right the rnage in the right document
int	type the hunk type
static int	UNMODIFIED type indicates an unmodified block

Constructor Summary

Constructors

Constructor and Description
Hunk(Range left, Range right, int type, Hunk prev) Creates a new hunk and adds it to the previous hunk

Method Summary

Modifier and Type	Method and Description
Hunk	next() Returns the next hunk of this chain
Hunk	prev() Returns the previous hunk of this chain
Hunk	write(DiffWriter out, int numContextLines) Writes a unified diff to the given writer and returns the next hunk to continue the output.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

UNMODIFIED

public static final int UNMODIFIED

type indicates an unmodified block

See Also:

Constant Field Values

INSERTED

public static final int INSERTED

type indicates an inserted block

See Also:

Constant Field Values

DELETED

public static final int DELETED

type indicates a deleted block

See Also:

Constant Field Values

CHANGED

public static final int CHANGED

type indicates a changed block

See Also:

Constant Field Values

left

public final Range left

the range in the left document

right

public final Range right

the rnage in the right document

type

public final int type

the hunk type

Constructor Detail

Hunk

public Hunk(Range left,
            Range right,
            int type,
            Hunk prev)

Creates a new hunk and adds it to the previous hunk

Parameters:

left - the left range

right - the right range

type - the hunk type

prev - the previous hunk

Method Detail

prev

public Hunk prev()

Returns the previous hunk of this chain

Returns:

the previous hunk.

next

public Hunk next()

Returns the next hunk of this chain

Returns:

the next hunk.

write

public Hunk write(DiffWriter out,
                  int numContextLines)
           throws java.io.IOException

Writes a unified diff to the given writer and returns the next hunk to continue the output.

Parameters:

out - the writer

numContextLines - the number of context lines to include in the diff blocks. do not change during iteration!

Returns:

the next hunk or null.

Throws:

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