com.bigdata.rdf.store

Class EmptyStatementIterator

java.lang.Object

com.bigdata.rdf.store.EmptyStatementIterator

All Implemented Interfaces:

BigdataStatementIterator, ICloseable, ICloseableIterator<BigdataStatement>, Iterator<BigdataStatement>

public class EmptyStatementIterator
extends Object
implements BigdataStatementIterator

Empty iterator.

Version:

$Id$

Author:

Bryan Thompson

Field Summary

Fields

Modifier and Type	Field and Description
static BigdataStatementIterator	INSTANCE

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closes the iterator, releasing any associated resources.
boolean	hasNext()
BigdataStatement	next()
void	remove()

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final transient BigdataStatementIterator INSTANCE

Method Detail

close

public void close()
           throws RuntimeException

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 ICloseable

Specified by:

close in interface ICloseableIterator<BigdataStatement>

Throws:

RuntimeException

hasNext

public boolean hasNext()
                throws RuntimeException

Specified by:

hasNext in interface Iterator<BigdataStatement>

Throws:

RuntimeException

next

public BigdataStatement next()
                      throws RuntimeException

Specified by:

next in interface Iterator<BigdataStatement>

Throws:

RuntimeException

remove

public void remove()
            throws RuntimeException

Specified by:

remove in interface Iterator<BigdataStatement>

Throws:

RuntimeException