org.apache.jena.dboe.base.file

Class BlockAccessBase

java.lang.Object

org.apache.jena.dboe.base.file.BlockAccessBase

All Implemented Interfaces:

org.apache.jena.atlas.lib.Closeable, org.apache.jena.atlas.lib.Sync, BlockAccess

Direct Known Subclasses:

BlockAccessDirect, BlockAccessMapped

public abstract class BlockAccessBase
extends Object
implements BlockAccess

Support for a disk file backed FileAccess

Constructor Summary

Constructors

Constructor and Description
BlockAccessBase(String filename, int blockSize)

Method Summary

Modifier and Type	Method and Description
long	allocBoundary()
void	close()
String	getLabel()
boolean	isClosed()
boolean	isEmpty()
void	resetAllocBoundary(long boundary) Reset the allocation space (i.e.
boolean	valid(long id)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jena.dboe.base.file.BlockAccess

allocate, overwrite, read, write

Methods inherited from interface org.apache.jena.atlas.lib.Sync

sync

Constructor Detail

BlockAccessBase

public BlockAccessBase(String filename,
                       int blockSize)

Method Detail

isEmpty

public final boolean isEmpty()

Specified by:

isEmpty in interface BlockAccess

allocBoundary

public final long allocBoundary()

Specified by:

allocBoundary in interface BlockAccess

resetAllocBoundary

public final void resetAllocBoundary(long boundary)

Description copied from interface: BlockAccess

Reset the allocation space (i.e. truncate). The boundary should be a number obtained from a previous call of allocLimit. It can not be greater than the current allocation boundary.

Specified by:

resetAllocBoundary in interface BlockAccess

valid

public final boolean valid(long id)

Specified by:

valid in interface BlockAccess

isClosed

public final boolean isClosed()

close

public final void close()

Specified by:

close in interface org.apache.jena.atlas.lib.Closeable

getLabel

public String getLabel()

Specified by:

getLabel in interface BlockAccess