com.bigdata.rdf.inf
Class FullyBufferedJustificationIterator

java.lang.Object
  com.bigdata.rdf.inf.FullyBufferedJustificationIterator

All Implemented Interfaces:

IJustificationIterator, IChunkedIterator<Justification>, ICloseableIterator<Justification>, Iterator<Justification>

public class FullyBufferedJustificationIterator
extends Object
implements IJustificationIterator

Fully buffers and then visits all Justifications for a given statement.

Version:

$Id: FullyBufferedJustificationIterator.java 2265 2009-10-26 12:51:06Z thompsonbry $

Author:

Bryan Thompson

Field Summary

Fields inherited from interface com.bigdata.rdf.inf.IJustificationIterator

log

Fields inherited from interface com.bigdata.striterator.IChunkedIterator

DEFAULT_CHUNK_SIZE

Constructor Summary

FullyBufferedJustificationIterator(AbstractTripleStore db, ISPO head)

Method Summary

void	close() Closes the iterator, releasing any associated resources.
boolean	hasNext()
Justification	next() The next element available from the iterator.
Justification[]	nextChunk() Return the next "chunk" from the iterator.
void	remove() Removes the last Justification visited from the database (non-batch API).

Methods inherited from class java.lang.Object

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

Constructor Detail

FullyBufferedJustificationIterator

public FullyBufferedJustificationIterator(AbstractTripleStore db,
                                          ISPO head)

Parameters:

db -

head - The statement whose justifications will be materialized.

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<Justification>

next

public Justification next()

Description copied from interface: IChunkedIterator

The next element available from the iterator.

Specified by:

next in interface IChunkedIterator<Justification>

Specified by:

next in interface Iterator<Justification>

remove

public void remove()

Removes the last Justification visited from the database (non-batch API).

Specified by:

remove in interface IChunkedIterator<Justification>

Specified by:

remove in interface Iterator<Justification>

close

public void close()

Description copied from interface: ICloseableIterator

Closes the iterator, releasing any associated resources. This method MAY be invoked safely if the iterator is already closed.

Note: Implementations that support Iterator.remove() MUST NOT eagerly close the iterator when it is exhausted since that would make it impossible to remove the last visited statement. Instead they MUST wait for an explicit ICloseableIterator.close() by the application.

Specified by:

close in interface ICloseableIterator<Justification>

nextChunk

public Justification[] nextChunk()

Description copied from interface: IChunkedIterator

Return the next "chunk" from the iterator.

Specified by:

nextChunk in interface IChunkedIterator<Justification>

Returns:

The next chunk.