Package org.eclipse.jgit.internal.storage.file

Class 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.

    • Method Detail

      • 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.

      • 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.

      • 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.