org.apache.wicket.util.diff
Class Chunk

java.lang.Object
  org.apache.wicket.util.diff.ToString
      org.apache.wicket.util.diff.Chunk

public class Chunk
extends ToString

Holds a information about a part of the text involved in a differencing or patching operation.

Version:

$Id: Chunk.java,v 1.1 2006/03/12 00:24:21 juanca Exp $

Author:

Juanco Anez

See Also:

Diff, Delta

Field Summary

protected int	anchor
protected List<Object>	chunk
protected int	count

Constructor Summary

Chunk(int pos, int count)
Creates a chunk that doesn't copy the original text.

Chunk(List<Object> iseq, int pos, int count)
Creates a chunk and saves a copy the original chunk's text.

Chunk(List<Object> iseq, int pos, int count, int offset)
Creates a chunk that will be displaced in the resulting text, and saves a copy the original chunk's text.

Chunk(Object[] iseq, int pos, int count)
Creates a chunk and saves a copy the original chunk's text.

Chunk(Object[] iseq, int pos, int count, int offset)
Creates a chunk that will be displaced in the resulting text, and saves a copy the original chunk's text.

Method Summary

int	anchor() Returns the anchor position of the chunk.
void	applyAdd(int start, List<Object> target) Add the text of this chunk to the target at the given position.
void	applyDelete(List<Object> target) Delete this chunk from he given text.
List<Object>	chunk() Returns the text saved for this chunk.
int	first() Returns the index of the first line of the chunk.
int	last() Returns the index of the last line of the chunk.
String	rangeString() Provide a string representation of the numeric range of this chunk.
void	rangeString(StringBuffer s) Provide a string representation of the numeric range of this chunk.
void	rangeString(StringBuffer s, String separ) Provide a string representation of the numeric range of this chunk.
int	rcsfrom() Returns the from index of the chunk in RCS terms.
int	rcsto() Returns the to index of the chunk in RCS terms.
int	size() Returns the size of the chunk.
static <T> List<T>	slice(List<T> seq, int pos, int count) Retrieves the specified part from a List.
static List<Object>	slice(Object[] seq, int pos, int count) Retrieves a slice from an Object array.
void	toString(StringBuffer s) Provide a string image of the chunk using the an empty prefix and postfix.
StringBuffer	toString(StringBuffer s, String prefix, String postfix) Provide a string image of the chunk using the given prefix and postfix.
boolean	verify(List<Object> target) Verifies that this chunk's saved text matches the corresponding text in the given sequence.

Methods inherited from class org.apache.wicket.util.diff.ToString

arrayToString, arrayToString, stringToArray, toString

Methods inherited from class java.lang.Object

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

Field Detail

anchor

protected int anchor

count

protected int count

chunk

protected List<Object> chunk

Constructor Detail

Chunk

public Chunk(int pos,
             int count)

Creates a chunk that doesn't copy the original text.

Parameters:

pos - the start position in the text.

count - the size of the chunk.

Chunk

public Chunk(Object[] iseq,
             int pos,
             int count)

Creates a chunk and saves a copy the original chunk's text.

Parameters:

iseq - the original text.

pos - the start position in the text.

count - the size of the chunk.

Chunk

public Chunk(Object[] iseq,
             int pos,
             int count,
             int offset)

Creates a chunk that will be displaced in the resulting text, and saves a copy the original chunk's text.

Parameters:

iseq - the original text.

pos - the start position in the text.

count - the size of the chunk.

offset - the position the chunk should have in the resulting text.

Chunk

public Chunk(List<Object> iseq,
             int pos,
             int count)

Creates a chunk and saves a copy the original chunk's text.

Parameters:

iseq - the original text.

pos - the start position in the text.

count - the size of the chunk.

Chunk

public Chunk(List<Object> iseq,
             int pos,
             int count,
             int offset)

Creates a chunk that will be displaced in the resulting text, and saves a copy the original chunk's text.

Parameters:

iseq - the original text.

pos - the start position in the text.

count - the size of the chunk.

offset - the position the chunk should have in the resulting text.

Method Detail

anchor

public int anchor()

Returns the anchor position of the chunk.

Returns:

the anchor position.

size

public int size()

Returns the size of the chunk.

Returns:

the size.

first

public int first()

Returns the index of the first line of the chunk.

Returns:

int

last

public int last()

Returns the index of the last line of the chunk.

Returns:

int

rcsfrom

public int rcsfrom()

Returns the from index of the chunk in RCS terms.

Returns:

int

rcsto

public int rcsto()

Returns the to index of the chunk in RCS terms.

Returns:

int

chunk

public List<Object> chunk()

Returns the text saved for this chunk.

Returns:

the text.

verify

public boolean verify(List<Object> target)

Verifies that this chunk's saved text matches the corresponding text in the given sequence.

Parameters:

target - the sequence to verify against.

Returns:

true if the texts match.

applyDelete

public void applyDelete(List<Object> target)

Delete this chunk from he given text.

Parameters:

target - the text to delete from.

applyAdd

public void applyAdd(int start,
                     List<Object> target)

Add the text of this chunk to the target at the given position.

Parameters:

start - where to add the text.

target - the text to add to.

toString

public void toString(StringBuffer s)

Provide a string image of the chunk using the an empty prefix and postfix.

Overrides:

toString in class ToString

Parameters:

s -

toString

public StringBuffer toString(StringBuffer s,
                             String prefix,
                             String postfix)

Provide a string image of the chunk using the given prefix and postfix.

Parameters:

s - where the string image should be appended.

prefix - the text that should prefix each line.

postfix - the text that should end each line.

Returns:

StringBuffer

slice

public static <T> List<T> slice(List<T> seq,
                                int pos,
                                int count)

Retrieves the specified part from a List.

Type Parameters:

T - the type of objects contained in seq

Parameters:

seq - the list to retrieve a slice from.

pos - the start position.

count - the number of items in the slice.

Returns:

a List containing the specified items.

slice

public static List<Object> slice(Object[] seq,
                                 int pos,
                                 int count)

Retrieves a slice from an Object array.

Parameters:

seq - the list to retrieve a slice from.

pos - the start position.

count - the number of items in the slice.

Returns:

a List containing the specified items.

rangeString

public String rangeString()

Provide a string representation of the numeric range of this chunk.

Returns:

String

rangeString

public void rangeString(StringBuffer s)

Provide a string representation of the numeric range of this chunk.

Parameters:

s - where the string representation should be appended.

rangeString

public void rangeString(StringBuffer s,
                        String separ)

Provide a string representation of the numeric range of this chunk.

Parameters:

s - where the string representation should be appended.

separ - what to use as line separator.