Class MemStatementIterator<X extends Exception>
- java.lang.Object
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- org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>
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- org.eclipse.rdf4j.common.iteration.LookAheadIteration<MemStatement,X>
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- org.eclipse.rdf4j.sail.memory.model.MemStatementIterator<X>
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- All Implemented Interfaces:
AutoCloseable
,CloseableIteration<MemStatement,X>
,Iteration<MemStatement,X>
public class MemStatementIterator<X extends Exception> extends LookAheadIteration<MemStatement,X>
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.
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Constructor Summary
Constructors Constructor Description MemStatementIterator(MemStatementList statementList, MemResource subject, MemIRI predicate, MemValue object, Boolean explicit, int snapshot, 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).
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods 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)
boolean
equals(Object o)
protected MemStatement
getNextElement()
Searches through statementList, starting from index _nextStatementIdx + 1, for statements that match the constraints that have been set for this iterator.org.eclipse.rdf4j.sail.memory.model.MemStatementIterator.Stats
getStats()
protected void
handleClose()
Called byAbstractCloseableIteration.close()
when it is called for the first time.int
hashCode()
String
toString()
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Methods inherited from class org.eclipse.rdf4j.common.iteration.LookAheadIteration
hasNext, next, remove
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Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration
close, isClosed
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Constructor Detail
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MemStatementIterator
public MemStatementIterator(MemStatementList statementList, MemResource subject, MemIRI predicate, MemValue object, Boolean explicit, int snapshot, 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).- 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.
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Method Detail
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cacheAwareInstance
public static CloseableIteration<MemStatement,SailException> cacheAwareInstance(MemStatementList smallestList, MemResource subj, MemIRI pred, MemValue obj, Boolean explicit, int snapshot, MemResource[] memContexts, MemStatementIteratorCache iteratorCache)
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getNextElement
protected MemStatement getNextElement()
Searches through statementList, starting from index _nextStatementIdx + 1, for statements that match the constraints that have been set for this iterator. If a matching statement has been found it will be stored in _nextStatement and _nextStatementIdx points to the index of this statement in _statementList. Otherwise, _nextStatement will set to null.- Specified by:
getNextElement
in classLookAheadIteration<MemStatement,X extends Exception>
- Returns:
- The next element, or null if no more elements are available.
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handleClose
protected void handleClose() throws X extends Exception
Description copied from class:AbstractCloseableIteration
Called byAbstractCloseableIteration.close()
when it is called for the first time. This method is only called once on each iteration. By default, this method does nothing.- Overrides:
handleClose
in classLookAheadIteration<MemStatement,X extends Exception>
- Throws:
X
X extends Exception
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getStats
public org.eclipse.rdf4j.sail.memory.model.MemStatementIterator.Stats getStats()
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