Package org.eclipse.rdf4j.sail.memory.model

Class MemStatementIterator

java.lang.Object

org.eclipse.rdf4j.sail.memory.model.MemStatementIterator

All Implemented Interfaces:

AutoCloseable, CloseableIteration<MemStatement,SailException>, Iteration<MemStatement,SailException>

public class MemStatementIterator
extends Object
implements CloseableIteration<MemStatement,SailException>

A StatementIterator that can iterate over a list of Statement objects. This iterator compares Resource and Literal objects using the '==' operator, which is possible thanks to the extensive sharing of these objects in the MemoryStore.

Field Summary

Fields

Modifier and Type	Field	Description
static int	MIN_SIZE_TO_CONSIDER_FOR_CACHE

Constructor Summary

Constructors

Constructor	Description
MemStatementIterator(MemStatementList statementList, MemResource subject, MemIRI predicate, MemValue object, Boolean explicit, int snapshot, MemStatementIteratorCache iteratorCache, MemResource... contexts)	Creates a new MemStatementIterator that will iterate over the statements contained in the supplied MemStatementList searching for statements that match the specified pattern of subject, predicate, object and context(s).

Method Summary

Modifier and Type	Method	Description
static CloseableIteration<MemStatement,SailException>	cacheAwareInstance(MemStatementList smallestList, MemResource subj, MemIRI pred, MemValue obj, Boolean explicit, int snapshot, MemResource[] memContexts, MemStatementIteratorCache iteratorCache)
void	close()	Closes this iteration, freeing any resources that it is holding.
boolean	equals(Object o)
org.eclipse.rdf4j.sail.memory.model.MemStatementIterator.Stats	getStats()
int	hashCode()
boolean	hasNext()	Returns true if the iteration has more elements.
MemStatement	next()	Returns the next element in the iteration.
void	remove()	Throws an UnsupportedOperationException.
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.common.iteration.CloseableIteration

stream

Field Detail

MIN_SIZE_TO_CONSIDER_FOR_CACHE

public static final int MIN_SIZE_TO_CONSIDER_FOR_CACHE

See Also:

Constant Field Values

Constructor Detail

MemStatementIterator

public MemStatementIterator(MemStatementList statementList,
                            MemResource subject,
                            MemIRI predicate,
                            MemValue object,
                            Boolean explicit,
                            int snapshot,
                            MemStatementIteratorCache iteratorCache,
                            MemResource... contexts)
                     throws InterruptedException

Creates a new MemStatementIterator that will iterate over the statements contained in the supplied MemStatementList searching for statements that match the specified pattern of subject, predicate, object and context(s).

Parameters:

statementList - the statements over which to iterate.

subject - subject of pattern.

predicate - predicate of pattern.

object - object of pattern.

contexts - context(s) of pattern.

Throws:

InterruptedException

Method Detail

cacheAwareInstance

public static CloseableIteration<MemStatement,SailException> cacheAwareInstance(MemStatementList smallestList,
                                                                                      MemResource subj,
                                                                                      MemIRI pred,
                                                                                      MemValue obj,
                                                                                      Boolean explicit,
                                                                                      int snapshot,
                                                                                      MemResource[] memContexts,
                                                                                      MemStatementIteratorCache iteratorCache)
                                                                               throws InterruptedException

Throws:

InterruptedException

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

getStats

public org.eclipse.rdf4j.sail.memory.model.MemStatementIterator.Stats getStats()

hasNext

public final boolean hasNext()

Description copied from interface: Iteration

Returns true if the iteration has more elements. (In other words, returns true if Iteration.next() would return an element rather than throwing a NoSuchElementException.)

Specified by:

hasNext in interface Iteration<MemStatement,SailException>

Returns:

true if the iteration has more elements.

next

public final MemStatement next()

Description copied from interface: Iteration

Returns the next element in the iteration.

Specified by:

next in interface Iteration<MemStatement,SailException>

Returns:

the next element in the iteration.

remove

public void remove()

Throws an UnsupportedOperationException.

Specified by:

remove in interface Iteration<MemStatement,SailException>

close

public final void close()

Description copied from interface: CloseableIteration

Closes this iteration, freeing any resources that it is holding. If the iteration has already been closed then invoking this method has no effect.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface CloseableIteration<MemStatement,SailException>