org.conqat.lib.commons.diff

Class RegionDiffer

java.lang.Object

org.conqat.lib.commons.diff.DifferBase<java.lang.String>

org.conqat.lib.commons.diff.RegionDiffer

public class RegionDiffer
extends DifferBase<java.lang.String>

Class for calculating diff based on given regions.

Constructor Summary

Constructors

Constructor and Description
RegionDiffer(java.lang.String regionDescription) Constructor.

Method Summary

Modifier and Type	Method and Description
protected java.util.List<TextChunk>	getChunks(java.lang.String elementText, boolean isLeft) This method return only three chunks.
protected java.lang.String	getDiffName() Returns the name for this diff.
protected java.lang.String	getElementText(java.lang.String element) Get the text of the element.

Methods inherited from class org.conqat.lib.commons.diff.DifferBase

performDiff, postProcessDiffDescription

Methods inherited from class java.lang.Object

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

Constructor Detail

RegionDiffer

public RegionDiffer(java.lang.String regionDescription)
             throws java.lang.IllegalArgumentException

Constructor.

Parameters:

regionDescription - description of the regions as a string, formatted as "leftStart-leftEnd:rightStart-rightEnd", where all are one-based inclusive line numbers.

Throws:

java.lang.IllegalArgumentException - if the regionDescription does not follow the required format.

Method Detail

getElementText

protected java.lang.String getElementText(java.lang.String element)

Get the text of the element.

Specified by:

getElementText in class DifferBase<java.lang.String>

getDiffName

protected java.lang.String getDiffName()

Returns the name for this diff.

Specified by:

getDiffName in class DifferBase<java.lang.String>

getChunks

protected java.util.List<TextChunk> getChunks(java.lang.String elementText,
                                              boolean isLeft)

This method return only three chunks. One for the text before the given region, the given region, and the text after. The comparison text is chosen such that the diff will be in the given region.

Specified by:

getChunks in class DifferBase<java.lang.String>

isLeft - indicates whether this method is called for the left or right element. The implementer then may behave differently for both elements (possibly depending on additional information).