com.github.difflib

Class DiffUtils

java.lang.Object

com.github.difflib.DiffUtils

public final class DiffUtils
extends Object

Implements the difference and patching engine

Version:

0.4.1

Author:

Dmitry Naumenko

Method Summary

Modifier and Type	Method and Description
static <T> Patch<T>	diff(List<T> original, List<T> revised) Computes the difference between the original and revised list of elements with default diff algorithm
static <T> Patch<T>	diff(List<T> original, List<T> revised, BiPredicate<T,T> equalizer) Computes the difference between the original and revised list of elements with default diff algorithm
static <T> Patch<T>	diff(List<T> original, List<T> revised, DiffAlgorithm<T> algorithm) Computes the difference between the original and revised list of elements with default diff algorithm
static Patch<String>	diff(String originalText, String revisedText) Computes the difference between the original and revised text.
static Patch<String>	diffInline(String original, String revised) Computes the difference between the given texts inline.
static <T> List<T>	patch(List<T> original, Patch<T> patch) Patch the original text with given patch
static <T> List<T>	unpatch(List<T> revised, Patch<T> patch) Unpatch the revised text for a given patch

Methods inherited from class java.lang.Object

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

Method Detail

diff

public static <T> Patch<T> diff(List<T> original,
                                List<T> revised)
                         throws DiffException

Computes the difference between the original and revised list of elements with default diff algorithm

Parameters:

original - The original text. Must not be null.

revised - The revised text. Must not be null.

Returns:

The patch describing the difference between the original and revised sequences. Never null.

Throws:

DiffException

diff

public static Patch<String> diff(String originalText,
                                 String revisedText)
                          throws DiffException

Computes the difference between the original and revised text.

Throws:

DiffException

diff

public static <T> Patch<T> diff(List<T> original,
                                List<T> revised,
                                BiPredicate<T,T> equalizer)
                         throws DiffException

Computes the difference between the original and revised list of elements with default diff algorithm

Parameters:

original - The original text. Must not be null.

revised - The revised text. Must not be null.

equalizer - the equalizer object to replace the default compare algorithm (Object.equals). If null the default equalizer of the default algorithm is used..

Returns:

The patch describing the difference between the original and revised sequences. Never null.

Throws:

DiffException

diff

public static <T> Patch<T> diff(List<T> original,
                                List<T> revised,
                                DiffAlgorithm<T> algorithm)
                         throws DiffException

Computes the difference between the original and revised list of elements with default diff algorithm

Parameters:

original - The original text. Must not be null.

revised - The revised text. Must not be null.

algorithm - The diff algorithm. Must not be null.

Returns:

The patch describing the difference between the original and revised sequences. Never null.

Throws:

DiffException

diffInline

public static Patch<String> diffInline(String original,
                                       String revised)
                                throws DiffException

Computes the difference between the given texts inline. This one uses the "trick" to make out of texts lists of characters, like DiffRowGenerator does and merges those changes at the end together again.

Parameters:

original -

revised -

Returns:

Throws:

DiffException

patch

public static <T> List<T> patch(List<T> original,
                                Patch<T> patch)
                         throws PatchFailedException

Patch the original text with given patch

Parameters:

original - the original text

patch - the given patch

Returns:

the revised text

Throws:

PatchFailedException - if can't apply patch

unpatch

public static <T> List<T> unpatch(List<T> revised,
                                  Patch<T> patch)

Unpatch the revised text for a given patch

Parameters:

revised - the revised text

patch - the given patch

Returns:

the original text