org.assertj.core.util.diff

Class DiffUtils

java.lang.Object

org.assertj.core.util.diff.DiffUtils

public class DiffUtils
extends java.lang.Object

Copy from https://code.google.com/p/java-diff-utils/.

Implements the difference and patching engine

Field Summary

Fields

Modifier and Type	Field and Description
private static java.util.regex.Pattern	unifiedDiffChunkRe

Constructor Summary

Constructors

Constructor and Description
DiffUtils()

Method Summary

Modifier and Type	Method and Description
static <T> Patch<T>	diff(java.util.List<T> original, java.util.List<T> revised) Computes the difference between the original and revised list of elements with default diff algorithm
static <T> Patch<T>	diff(java.util.List<T> original, java.util.List<T> revised, DiffAlgorithm<T> algorithm) Computes the difference between the original and revised list of elements with default diff algorithm
static java.util.List<java.lang.String>	generateUnifiedDiff(java.lang.String original, java.lang.String revised, java.util.List<java.lang.String> originalLines, Patch<java.lang.String> patch, int contextSize) generateUnifiedDiff takes a Patch and some other arguments, returning the Unified Diff format text representing the Patch.
private static java.util.List<java.lang.String>	getDeltaText(Delta<java.lang.String> delta) getDeltaText returns the lines to be added to the Unified Diff text from the Delta parameter
static Patch<java.lang.String>	parseUnifiedDiff(java.util.List<java.lang.String> diff) Parse the given text in unified format and creates the list of deltas for it.
static <T> java.util.List<T>	patch(java.util.List<T> original, Patch<T> patch) Patch the original text with given patch
private static java.util.List<java.lang.String>	processDeltas(java.util.List<java.lang.String> origLines, java.util.List<Delta<java.lang.String>> deltas, int contextSize) processDeltas takes a list of Deltas and outputs them together in a single block of Unified-Diff-format text.

Methods inherited from class java.lang.Object

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

Field Detail

unifiedDiffChunkRe

private static java.util.regex.Pattern unifiedDiffChunkRe

Constructor Detail

DiffUtils

public DiffUtils()

Method Detail

diff

public static <T> Patch<T> diff(java.util.List<T> original,
                                java.util.List<T> revised)

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.

diff

public static <T> Patch<T> diff(java.util.List<T> original,
                                java.util.List<T> revised,
                                DiffAlgorithm<T> algorithm)

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.

patch

public static <T> java.util.List<T> patch(java.util.List<T> original,
                                          Patch<T> patch)
                                   throws java.lang.IllegalStateException

Patch the original text with given patch

Parameters:

original - the original text

patch - the given patch

Returns:

the revised text

Throws:

java.lang.IllegalStateException - if can't apply patch

parseUnifiedDiff

public static Patch<java.lang.String> parseUnifiedDiff(java.util.List<java.lang.String> diff)

Parse the given text in unified format and creates the list of deltas for it.

Parameters:

diff - the text in unified format

Returns:

the patch with deltas.

generateUnifiedDiff

public static java.util.List<java.lang.String> generateUnifiedDiff(java.lang.String original,
                                                                   java.lang.String revised,
                                                                   java.util.List<java.lang.String> originalLines,
                                                                   Patch<java.lang.String> patch,
                                                                   int contextSize)

generateUnifiedDiff takes a Patch and some other arguments, returning the Unified Diff format text representing the Patch.

Parameters:

original - Filename of the original (unrevised file)

revised - Filename of the revised file

originalLines - Lines of the original file

patch - Patch created by the diff() function

contextSize - number of lines of context output around each difference in the file.

Returns:

List of strings representing the Unified Diff representation of the Patch argument.

processDeltas

private static java.util.List<java.lang.String> processDeltas(java.util.List<java.lang.String> origLines,
                                                              java.util.List<Delta<java.lang.String>> deltas,
                                                              int contextSize)

processDeltas takes a list of Deltas and outputs them together in a single block of Unified-Diff-format text.

Parameters:

origLines - the lines of the original file

deltas - the Deltas to be output as a single block

contextSize - the number of lines of context to place around block

getDeltaText

private static java.util.List<java.lang.String> getDeltaText(Delta<java.lang.String> delta)

getDeltaText returns the lines to be added to the Unified Diff text from the Delta parameter

Parameters:

delta - the Delta to output

Returns:

list of String lines of code.