org.eclipse.jgit.internal.storage.reftable

Class Reftable

java.lang.Object

org.eclipse.jgit.internal.storage.reftable.Reftable

All Implemented Interfaces:

AutoCloseable

Direct Known Subclasses:

MergedReftable, ReftableReader

public abstract class Reftable
extends Object
implements AutoCloseable

Abstract table of references.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	includeDeletes true if deletions should be included in results.

Constructor Summary

Constructors

Constructor and Description
Reftable()

Method Summary

Modifier and Type	Method and Description
abstract LogCursor	allLogs() Seek reader to read log records.
abstract RefCursor	allRefs() Seek to the first reference, to iterate in order.
abstract RefCursor	byObjectId(AnyObjectId id) Match references pointing to a specific object.
abstract void	close()
Ref	exactRef(String refName) Lookup a reference, or null if not found.
static Reftable	from(Collection<Ref> refs) References to convert into a reftable
boolean	hasId(AnyObjectId id) Test if any reference directly refers to the object.
boolean	hasRef(String refName) Test if a reference or reference subtree exists.
Ref	resolve(Ref symref) Resolve a symbolic reference to populate its value.
LogCursor	seekLog(String refName) Read a single reference's log.
abstract LogCursor	seekLog(String refName, long updateIndex) Seek to an update index in a reference's log.
abstract RefCursor	seekRef(String refName) Seek either to a reference, or a reference subtree.
void	setIncludeDeletes(boolean deletes) Whether deleted references will be returned.

Methods inherited from class java.lang.Object

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

Field Detail

includeDeletes

protected boolean includeDeletes

true if deletions should be included in results.

Constructor Detail

Reftable

public Reftable()

Method Detail

from

public static Reftable from(Collection<Ref> refs)

References to convert into a reftable

Parameters:

refs - references to convert into a reftable; may be empty.

Returns:

a reader for the supplied references.

setIncludeDeletes

public void setIncludeDeletes(boolean deletes)

Whether deleted references will be returned.

Parameters:

deletes - if true deleted references will be returned. If false (default behavior), deleted references will be skipped, and not returned.

allRefs

public abstract RefCursor allRefs()
                           throws IOException

Seek to the first reference, to iterate in order.

Returns:

cursor to iterate.

Throws:

IOException - if references cannot be read.

seekRef

public abstract RefCursor seekRef(String refName)
                           throws IOException

Seek either to a reference, or a reference subtree.

If refName ends with "/" the method will seek to the subtree of all references starting with refName as a prefix. If no references start with this prefix, an empty cursor is returned.

Otherwise exactly refName will be looked for. If present, the returned cursor will iterate exactly one entry. If not found, an empty cursor is returned.

Parameters:

refName - reference name or subtree to find.

Returns:

cursor to iterate; empty cursor if no references match.

Throws:

IOException - if references cannot be read.

byObjectId

public abstract RefCursor byObjectId(AnyObjectId id)
                              throws IOException

Match references pointing to a specific object.

Parameters:

id - object to find.

Returns:

cursor to iterate; empty cursor if no references match.

Throws:

IOException - if references cannot be read.

allLogs

public abstract LogCursor allLogs()
                           throws IOException

Seek reader to read log records.

Returns:

cursor to iterate; empty cursor if no logs are present.

Throws:

IOException - if logs cannot be read.

seekLog

public LogCursor seekLog(String refName)
                  throws IOException

Read a single reference's log.

Parameters:

refName - exact name of the reference whose log to read.

Returns:

cursor to iterate; empty cursor if no logs match.

Throws:

IOException - if logs cannot be read.

seekLog

public abstract LogCursor seekLog(String refName,
                                  long updateIndex)
                           throws IOException

Seek to an update index in a reference's log.

Parameters:

refName - exact name of the reference whose log to read.

updateIndex - most recent index to return first in the log cursor. Log records at or before updateIndex will be returned.

Returns:

cursor to iterate; empty cursor if no logs match.

Throws:

IOException - if logs cannot be read.

exactRef

@Nullable
public Ref exactRef(String refName)
                       throws IOException

Lookup a reference, or null if not found.

Parameters:

refName - reference name to find.

Returns:

the reference, or null if not found.

Throws:

IOException - if references cannot be read.

hasRef

public boolean hasRef(String refName)
               throws IOException

Test if a reference or reference subtree exists.

If refName ends with "/", the method tests if any reference starts with refName as a prefix.

Otherwise, the method checks if refName exists.

Parameters:

refName - reference name or subtree to find.

Returns:

true if the reference exists, or at least one reference exists in the subtree.

Throws:

IOException - if references cannot be read.

hasId

public boolean hasId(AnyObjectId id)
              throws IOException

Test if any reference directly refers to the object.

Parameters:

id - ObjectId to find.

Returns:

true if any reference exists directly referencing id, or a annotated tag that peels to id.

Throws:

IOException - if references cannot be read.

resolve

@Nullable
public Ref resolve(Ref symref)
                      throws IOException

Resolve a symbolic reference to populate its value.

Parameters:

symref - reference to resolve.

Returns:

resolved symref, or null.

Throws:

IOException - if references cannot be read.

close

public abstract void close()
                    throws IOException

Specified by:

close in interface AutoCloseable

Throws:

IOException