Class MemTripleIterator<X extends Exception>

java.lang.Object

org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<MemTriple, X>

org.eclipse.rdf4j.common.iteration.LookAheadIteration<MemTriple, X>

org.eclipse.rdf4j.sail.memory.model.MemTripleIterator<X>

All Implemented Interfaces:

AutoCloseable, CloseableIteration<MemTriple, X>, Iteration<MemTriple, X>

public class MemTripleIterator<X extends Exception>
extends LookAheadIteration<MemTriple, X>

An Iteration that can iterate over a list of Triple objects.

Field Summary

Fields

Modifier and Type	Field	Description
private final MemValue	object	The object of statements to return, or null if any object is OK.
private final MemIRI	predicate	The predicate of statements to return, or null if any predicate is OK.
private final int	snapshot	Indicates which snapshot should be iterated over.
private int	statementIndex	The index of the last statement that has been returned.
private final MemStatement[]	statementList	The lists of statements over which to iterate.
private final int	statementListSize
private final MemResource	subject	The subject of statements to return, or null if any subject is OK.

Constructor Summary

Constructors

Constructor	Description
MemTripleIterator(MemStatementList statementList, MemResource subject, MemIRI predicate, MemValue object, int snapshot)	Creates a new MemTripleIterator that will iterate over the triples contained in the supplied MemStatementList searching for triples that occur as either subject or object in those statements, and which match the specified pattern of subject, predicate, object.

Method Summary

Modifier and Type	Method	Description
protected MemTriple	getNextElement()	Searches through statementList, starting from index _nextStatementIdx + 1, for triples that match the constraints that have been set for this iterator.
private boolean	isInSnapshot(MemStatement st)

Methods inherited from class LookAheadIteration

handleClose, hasNext, next, remove

Methods inherited from class AbstractCloseableIteration

close, isClosed

Methods inherited from class Object

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

Methods inherited from interface CloseableIteration

stream

Field Details

statementList

private final MemStatement[] statementList

The lists of statements over which to iterate.

subject

private final MemResource subject

The subject of statements to return, or null if any subject is OK.

predicate

private final MemIRI predicate

The predicate of statements to return, or null if any predicate is OK.

object

private final MemValue object

The object of statements to return, or null if any object is OK.

snapshot

private final int snapshot

Indicates which snapshot should be iterated over.

statementListSize

private final int statementListSize

statementIndex

private int statementIndex

The index of the last statement that has been returned.

Constructor Details

MemTripleIterator

public MemTripleIterator(MemStatementList statementList,
 MemResource subject,
 MemIRI predicate,
 MemValue object,
 int snapshot)
                  throws InterruptedException

Creates a new MemTripleIterator that will iterate over the triples contained in the supplied MemStatementList searching for triples that occur as either subject or object in those statements, and which match the specified pattern of subject, predicate, object.

Parameters:

statementList - the statements over which to iterate.

subject - subject of pattern.

predicate - predicate of pattern.

object - object of pattern.

Throws:

InterruptedException

Method Details

getNextElement

protected MemTriple getNextElement()

Searches through statementList, starting from index _nextStatementIdx + 1, for triples that match the constraints that have been set for this iterator.

Specified by:

getNextElement in class LookAheadIteration<MemTriple, X extends Exception>

Returns:

The next element, or null if no more elements are available.

isInSnapshot

private boolean isInSnapshot(MemStatement st)