Class LowLevelDiffAlgorithm

java.lang.Object
org.eclipse.jgit.diff.DiffAlgorithm
org.eclipse.jgit.diff.LowLevelDiffAlgorithm
Direct Known Subclasses:
HistogramDiff

public abstract class LowLevelDiffAlgorithm extends DiffAlgorithm
Compares two sequences primarily based upon hash codes.
  • Constructor Details

    • LowLevelDiffAlgorithm

      public LowLevelDiffAlgorithm()
  • Method Details

    • diffNonCommon

      public <S extends Sequence> EditList diffNonCommon(SequenceComparator<? super S> cmp, S a, S b)
      Compare two sequences and identify a list of edits between them. This method should be invoked only after the two sequences have been proven to have no common starting or ending elements. The expected elimination of common starting and ending elements is automatically performed by the DiffAlgorithm.diff(SequenceComparator, Sequence, Sequence) method, which invokes this method using Subsequences.
      Specified by:
      diffNonCommon in class DiffAlgorithm
      Parameters:
      cmp - the comparator supplying the element equivalence function.
      a - the first (also known as old or pre-image) sequence. Edits returned by this algorithm will reference indexes using the 'A' side: Edit.getBeginA(), Edit.getEndA().
      b - the second (also known as new or post-image) sequence. Edits returned by this algorithm will reference indexes using the 'B' side: Edit.getBeginB(), Edit.getEndB().
      Returns:
      a modifiable edit list comparing the two sequences.
    • diffNonCommon

      public abstract <S extends Sequence> void diffNonCommon(EditList edits, HashedSequenceComparator<S> cmp, HashedSequence<S> a, HashedSequence<S> b, Edit region)
      Compare two sequences and identify a list of edits between them. This method should be invoked only after the two sequences have been proven to have no common starting or ending elements. The expected elimination of common starting and ending elements is automatically performed by the DiffAlgorithm.diff(SequenceComparator, Sequence, Sequence) method, which invokes this method using Subsequences.
      Parameters:
      edits - result list to append the region's edits onto.
      cmp - the comparator supplying the element equivalence function.
      a - the first (also known as old or pre-image) sequence. Edits returned by this algorithm will reference indexes using the 'A' side: Edit.getBeginA(), Edit.getEndA().
      b - the second (also known as new or post-image) sequence. Edits returned by this algorithm will reference indexes using the 'B' side: Edit.getBeginB(), Edit.getEndB().
      region - the region being compared within the two sequences.