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

Class PackBitmapIndexV1

java.lang.Object

org.eclipse.jgit.internal.storage.file.PackBitmapIndex

org.eclipse.jgit.internal.storage.file.BasePackBitmapIndex

org.eclipse.jgit.internal.storage.file.PackBitmapIndexV1

class PackBitmapIndexV1
extends BasePackBitmapIndex

Support for the pack bitmap index v1 format.

See Also:

PackBitmapIndex

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.jgit.internal.storage.file.BasePackBitmapIndex

BasePackBitmapIndex.StoredBitmap

Field Summary

Fields

Modifier and Type	Field	Description
private ObjectIdOwnerMap<BasePackBitmapIndex.StoredBitmap>	bitmaps
private com.googlecode.javaewah.EWAHCompressedBitmap	blobs
private com.googlecode.javaewah.EWAHCompressedBitmap	commits
(package private) static byte[]	MAGIC
private static int	MAX_XOR_OFFSET
(package private) static int	OPT_FULL
private PackIndex	packIndex
private PackReverseIndex	reverseIndex
private com.googlecode.javaewah.EWAHCompressedBitmap	tags
private com.googlecode.javaewah.EWAHCompressedBitmap	trees

Fields inherited from class org.eclipse.jgit.internal.storage.file.PackBitmapIndex

FLAG_REUSE, packChecksum

Constructor Summary

Constructors

Constructor	Description
PackBitmapIndexV1(java.io.InputStream fd, PackIndex packIndex, PackReverseIndex reverseIndex)

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object o)
int	findPosition(AnyObjectId objectId)	Finds the position in the bitmap of the object.
int	getBitmapCount()	Returns the number of bitmaps in this bitmap index.
ObjectId	getObject(int position)	Get the object at the bitmap position.
int	getObjectCount()	Obtain the total number of objects described by this index.
(package private) PackIndex	getPackIndex()
int	hashCode()
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.
private static com.googlecode.javaewah.EWAHCompressedBitmap	readBitmap(java.io.DataInput dataInput)

Methods inherited from class org.eclipse.jgit.internal.storage.file.BasePackBitmapIndex

getBitmap, getBitmaps

Methods inherited from class org.eclipse.jgit.internal.storage.file.PackBitmapIndex

open, read

Methods inherited from class java.lang.Object

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

Field Detail

MAGIC

static final byte[] MAGIC

OPT_FULL

static final int OPT_FULL

See Also:

Constant Field Values

MAX_XOR_OFFSET

private static final int MAX_XOR_OFFSET

See Also:

Constant Field Values

packIndex

private final PackIndex packIndex

reverseIndex

private final PackReverseIndex reverseIndex

commits

private final com.googlecode.javaewah.EWAHCompressedBitmap commits

trees

private final com.googlecode.javaewah.EWAHCompressedBitmap trees

blobs

private final com.googlecode.javaewah.EWAHCompressedBitmap blobs

tags

private final com.googlecode.javaewah.EWAHCompressedBitmap tags

bitmaps

private final ObjectIdOwnerMap<BasePackBitmapIndex.StoredBitmap> bitmaps

Constructor Detail

PackBitmapIndexV1

PackBitmapIndexV1(java.io.InputStream fd,
                  PackIndex packIndex,
                  PackReverseIndex reverseIndex)
           throws java.io.IOException

Throws:

java.io.IOException

Method Detail

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 java.lang.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:

java.lang.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.

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.

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

getPackIndex

PackIndex getPackIndex()

readBitmap

private static com.googlecode.javaewah.EWAHCompressedBitmap readBitmap(java.io.DataInput dataInput)
                                                                throws java.io.IOException

Throws:

java.io.IOException