org.openrdf.store.blob.disk

Class LiveDiskBlob

java.lang.Object

org.openrdf.store.blob.BlobObject

org.openrdf.store.blob.disk.LiveDiskBlob

All Implemented Interfaces:

FileObject

public class LiveDiskBlob
extends BlobObject

A blob object that represents the latest committed blob version and commits changes as soon as the OutputStream is closed.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	LiveDiskBlob(DiskBlobStore store, String uri)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	delete()
boolean	equals(Object obj)
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.
InputStream	openInputStream()
OutputStream	openOutputStream()

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

LiveDiskBlob

protected LiveDiskBlob(DiskBlobStore store,
            String uri)
                throws IOException

Throws:

IOException

Method Detail

openOutputStream

public OutputStream openOutputStream()
                              throws IOException

Throws:

IOException

delete

public boolean delete()

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()

equals

public boolean equals(Object obj)

Specified by:

equals in class BlobObject

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

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

openInputStream

public InputStream openInputStream()
                            throws IOException

Throws:

IOException