Class PackBitmapIndexRemapper

  • All Implemented Interfaces:
    java.lang.Iterable<PackBitmapIndexRemapper.Entry>

    public class PackBitmapIndexRemapper
    extends PackBitmapIndex
    implements java.lang.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)
        Description copied from class: PackBitmapIndex
        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 java.lang.IllegalArgumentException
        Description copied from class: PackBitmapIndex
        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:
        java.lang.IllegalArgumentException - when the item is not found.
      • getObjectCount

        public int getObjectCount()
        Description copied from class: PackBitmapIndex
        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)
        Description copied from class: PackBitmapIndex
        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)
        Description copied from class: PackBitmapIndex
        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.