Class PackBitmapIndexRemapper

java.lang.Object
org.eclipse.jgit.internal.storage.file.PackBitmapIndex
org.eclipse.jgit.internal.storage.file.PackBitmapIndexRemapper
All Implemented Interfaces:
Iterable<PackBitmapIndexRemapper.Entry>

public class PackBitmapIndexRemapper extends PackBitmapIndex implements Iterable<PackBitmapIndexRemapper.Entry>
A PackBitmapIndex that remaps the bitmaps in the previous index to the positions in the new pack index. Note, unlike typical PackBitmapIndex implementations this implementation is not thread safe, as it is intended to be used with a PackBitmapIndexBuilder, which is also not thread safe.
  • Field Details

    • oldPackIndex

      private final BasePackBitmapIndex oldPackIndex
    • newPackIndex

      final PackBitmapIndex newPackIndex
    • inflated

      private final BitSet inflated
    • prevToNewMapping

      private final int[] prevToNewMapping
  • Constructor Details

  • Method Details

    • newPackBitmapIndex

      public static PackBitmapIndexRemapper newPackBitmapIndex(BitmapIndex prevBitmapIndex, PackBitmapIndex newIndex)
      A PackBitmapIndex that maps the positions in the prevBitmapIndex to the ones in the newIndex.
      Parameters:
      prevBitmapIndex - the bitmap index with the old mapping.
      newIndex - the bitmap index with the new mapping.
      Returns:
      a bitmap index that attempts to do the mapping between the two.
    • findPosition

      public int findPosition(AnyObjectId objectId)
      Finds the position in the bitmap of the object.
      Specified by:
      findPosition in class PackBitmapIndex
      Parameters:
      objectId - the id for which the bitmap position will be found.
      Returns:
      the bitmap id or -1 if the object was not found.
    • getObject

      public ObjectId getObject(int position) throws IllegalArgumentException
      Get the object at the bitmap position.
      Specified by:
      getObject in class PackBitmapIndex
      Parameters:
      position - the id for which the object will be found.
      Returns:
      the ObjectId.
      Throws:
      IllegalArgumentException - when the item is not found.
    • getObjectCount

      public int getObjectCount()
      Obtain the total number of objects described by this index. getObjectCount() - 1 is the largest bit that will be set in a bitmap.
      Specified by:
      getObjectCount in class PackBitmapIndex
      Returns:
      number of objects in this index, and likewise in the associated pack that this index was generated from.
    • ofObjectType

      public com.googlecode.javaewah.EWAHCompressedBitmap ofObjectType(com.googlecode.javaewah.EWAHCompressedBitmap bitmap, int type)
      Returns a bitmap containing positions for objects that have the given Git type.
      Specified by:
      ofObjectType in class PackBitmapIndex
      Parameters:
      bitmap - the object bitmap.
      type - the Git type.
      Returns:
      the object bitmap with only objects of the Git type.
    • iterator

      Specified by:
      iterator in interface Iterable<PackBitmapIndexRemapper.Entry>
    • getBitmap

      public com.googlecode.javaewah.EWAHCompressedBitmap getBitmap(AnyObjectId objectId)
      Returns the previously constructed bitmap for the object.
      Specified by:
      getBitmap in class PackBitmapIndex
      Parameters:
      objectId - the id for which the bitmap will be found.
      Returns:
      the bitmap or null if the object was not found.
    • getBitmapCount

      public int getBitmapCount()
      Returns the number of bitmaps in this bitmap index.
      Specified by:
      getBitmapCount in class PackBitmapIndex
      Returns:
      the number of bitmaps in this bitmap index.