com.bigdata.rdf.store
Class BigdataValueIteratorImpl

java.lang.Object
  com.bigdata.rdf.store.BigdataValueIteratorImpl

All Implemented Interfaces:

BigdataValueIterator, ICloseableIterator<BigdataValue>, Iterator<BigdataValue>

public class BigdataValueIteratorImpl
extends Object
implements BigdataValueIterator

Wraps an iterator that visits term identifiers and exposes each visited term identifier as a BigdataValue (batch API).

Version:

$Id: BigdataValueIteratorImpl.java 4837 2011-07-05 13:31:31Z thompsonbry $

Author:

Bryan Thompson

Constructor Summary

BigdataValueIteratorImpl(AbstractTripleStore db, IChunkedIterator<IV> src)

Method Summary

void	close() Closes the iterator, releasing any associated resources.
boolean	hasNext()
BigdataValue	next()
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

BigdataValueIteratorImpl

public BigdataValueIteratorImpl(AbstractTripleStore db,
                                IChunkedIterator<IV> src)

Parameters:

db - Used to resolve term identifiers to Value objects.

src - The source iterator.

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<BigdataValue>

next

public BigdataValue next()

Specified by:

next in interface Iterator<BigdataValue>

remove

public void remove()

Specified by:

remove in interface Iterator<BigdataValue>

Throws:

UnsupportedOperationException

TODO:

this could be implemented if we saved the last term identifier visited.

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. Implementations of this interface MUST invoke ICloseableIterator.close() if Iterator.hasNext() method returns false to ensure that the iterator is closed (and its resources release) as soon as it is exhausted.

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<BigdataValue>