org.openrdf.store.blob.disk

Class DiskBlob

java.lang.Object

org.openrdf.store.blob.BlobObject

org.openrdf.store.blob.disk.DiskBlob

All Implemented Interfaces:

FileObject, DiskListener

public class DiskBlob
extends BlobObject
implements DiskListener

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DiskBlob(DiskBlobVersion disk, String uri)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	abort()
void	changed(String uri)
boolean	delete()
boolean	equals(Object obj)
protected boolean	erase()
String	getCommittedVersion() Identifier of the most recent committed blob version that is read by this BlobObject.
long	getLastModified()
long	getLength() Returns the number of bytes in the BLOB value designated by this Blob object.
String[]	getRecentVersions() Most recent version identifiers that have committed modifications of this blob.
protected boolean	hasConflict()
protected boolean	isChangePending()
InputStream	openInputStream()
OutputStream	openOutputStream()
protected boolean	resync()
protected boolean	sync()

Methods inherited from class org.openrdf.store.blob.BlobObject

getCharContent, getName, openReader, openWriter, toString, toUri

Methods inherited from class java.lang.Object

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

Constructor Detail

DiskBlob

protected DiskBlob(DiskBlobVersion disk,
        String uri)

Method Detail

equals

public boolean equals(Object obj)

Specified by:

equals in class BlobObject

getCommittedVersion

public String getCommittedVersion()
                           throws IOException

Description copied from class: BlobObject

Identifier of the most recent committed blob version that is read by this BlobObject. This method can be used after committing a BlobVersion to retrieve the committed version identifier, which can later be passed to BlobStore.openVersion(String) to reread this version of this blob.

Specified by:

getCommittedVersion in class BlobObject

Returns:

version identifier or null if this blob has no version

Throws:

IOException

getRecentVersions

public String[] getRecentVersions()
                           throws IOException

Description copied from class: BlobObject

Most recent version identifiers that have committed modifications of this blob. The first identifier in the response is the most recent.

Specified by:

getRecentVersions in class BlobObject

Throws:

IOException

delete

public boolean delete()

Specified by:

delete in interface FileObject

getLength

public long getLength()
               throws IOException

Description copied from class: BlobObject

Returns the number of bytes in the BLOB value designated by this Blob object.

Specified by:

getLength in class BlobObject

Returns:

length of the BLOB in bytes

Throws:

IOException

getLastModified

public long getLastModified()

Specified by:

getLastModified in interface FileObject

openInputStream

public InputStream openInputStream()
                            throws IOException

Specified by:

openInputStream in interface FileObject

Throws:

IOException

openOutputStream

public OutputStream openOutputStream()
                              throws IOException

Specified by:

openOutputStream in interface FileObject

Throws:

IOException

changed

public void changed(String uri)

Specified by:

changed in interface DiskListener

hasConflict

protected boolean hasConflict()

isChangePending

protected boolean isChangePending()

resync

protected boolean resync()
                  throws IOException

Throws:

IOException

sync

protected boolean sync()
                throws IOException

Throws:

IOException

abort

protected void abort()

erase

protected boolean erase()
                 throws IOException

Throws:

IOException