Package org.eclipse.jgit.internal.storage.dfs

Class DfsInserter.Reader

java.lang.Object

org.eclipse.jgit.lib.ObjectReader

org.eclipse.jgit.internal.storage.dfs.DfsInserter.Reader

All Implemented Interfaces:

java.lang.AutoCloseable

Enclosing class:

DfsInserter

private class DfsInserter.Reader
extends ObjectReader

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.jgit.lib.ObjectReader

ObjectReader.Filter

Field Summary

Fields

Modifier and Type	Field	Description
private DfsReader	ctx

Fields inherited from class org.eclipse.jgit.lib.ObjectReader

OBJ_ANY, streamFileThreshold

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Reader()

Method Summary

Modifier and Type	Method	Description
void	close()
ObjectInserter	getCreatedFromInserter()	Get the ObjectInserter from which this reader was created using inserter.newReader()
java.util.Set<ObjectId>	getShallowCommits()	Returns IDs for those commits which should be considered as shallow.
boolean	has(AnyObjectId objectId)	Does the requested object exist in this database?
private byte[]	inflate(PackedObjectInfo obj, long zpos, int sz)
ObjectReader	newReader()	Construct a new reader from the same data.
ObjectLoader	open(AnyObjectId objectId, int typeHint)	Open an object from this database.
java.util.Collection<ObjectId>	resolve(AbbreviatedObjectId id)	Resolve an abbreviated ObjectId to its full form.

Methods inherited from class org.eclipse.jgit.lib.ObjectReader

abbreviate, abbreviate, createObjectReachabilityChecker, createReachabilityChecker, getBitmapIndex, getObjectSize, getObjectSize, getStreamFileThreshold, has, open, open, setAvoidUnreachableObjects, setStreamFileThreshold

Methods inherited from class java.lang.Object

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

Field Detail

ctx

private final DfsReader ctx

Constructor Detail

Reader

private Reader()

Method Detail

newReader

public ObjectReader newReader()

Description copied from class: ObjectReader

Construct a new reader from the same data.

Applications can use this method to build a new reader from the same data source, but for an different thread.

Specified by:

newReader in class ObjectReader

Returns:

a brand new reader, using the same data source.

resolve

public java.util.Collection<ObjectId> resolve(AbbreviatedObjectId id)
                                       throws java.io.IOException

Description copied from class: ObjectReader

Resolve an abbreviated ObjectId to its full form. This method searches for an ObjectId that begins with the abbreviation, and returns at least some matching candidates. If the returned collection is empty, no objects start with this abbreviation. The abbreviation doesn't belong to this repository, or the repository lacks the necessary objects to complete it. If the collection contains exactly one member, the abbreviation is (currently) unique within this database. There is a reasonably high probability that the returned id is what was previously abbreviated. If the collection contains 2 or more members, the abbreviation is not unique. In this case the implementation is only required to return at least 2 candidates to signal the abbreviation has conflicts. User friendly implementations should return as many candidates as reasonably possible, as the caller may be able to disambiguate further based on context. However since databases can be very large (e.g. 10 million objects) returning 625,000 candidates for the abbreviation "0" is simply unreasonable, so implementors should draw the line at around 256 matches.

Specified by:

resolve in class ObjectReader

Parameters:

id - abbreviated id to resolve to a complete identity. The abbreviation must have a length of at least 2.

Returns:

candidates that begin with the abbreviated identity.

Throws:

java.io.IOException - the object store cannot be read.

open

public ObjectLoader open(AnyObjectId objectId,
                         int typeHint)
                  throws java.io.IOException

Description copied from class: ObjectReader

Open an object from this database.

Specified by:

open in class ObjectReader

Parameters:

objectId - identity of the object to open.

typeHint - hint about the type of object being requested, e.g. Constants.OBJ_BLOB; ObjectReader.OBJ_ANY if the object type is not known, or does not matter to the caller.

Returns:

a ObjectLoader for accessing the object.

Throws:

MissingObjectException - the object does not exist.

IncorrectObjectTypeException - typeHint was not OBJ_ANY, and the object's actual type does not match typeHint.

java.io.IOException - the object store cannot be accessed.

inflate

private byte[] inflate(PackedObjectInfo obj,
                       long zpos,
                       int sz)
                throws java.io.IOException,
                       CorruptObjectException

Throws:

java.io.IOException

CorruptObjectException

has

public boolean has(AnyObjectId objectId)
            throws java.io.IOException

Description copied from class: ObjectReader

Does the requested object exist in this database?

Overrides:

has in class ObjectReader

Parameters:

objectId - identity of the object to test for existence of.

Returns:

true if the specified object is stored in this database.

Throws:

java.io.IOException - the object store cannot be accessed.

getShallowCommits

public java.util.Set<ObjectId> getShallowCommits()
                                          throws java.io.IOException

Description copied from class: ObjectReader

Returns IDs for those commits which should be considered as shallow.

Specified by:

getShallowCommits in class ObjectReader

Returns:

IDs of shallow commits

Throws:

java.io.IOException

getCreatedFromInserter

public ObjectInserter getCreatedFromInserter()

Description copied from class: ObjectReader

Get the ObjectInserter from which this reader was created using inserter.newReader()

Overrides:

getCreatedFromInserter in class ObjectReader

Returns:

the ObjectInserter from which this reader was created using inserter.newReader(), or null if this reader was not created from an inserter.

close

public void close()

Description copied from class: ObjectReader

Release any resources used by this reader.

A reader that has been released can be used again, but may need to be released after the subsequent usage.

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in class ObjectReader