Class StatementConversionIteration
- java.lang.Object
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- org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<BindingSet,QueryEvaluationException>
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- org.eclipse.rdf4j.federated.evaluation.iterator.StatementConversionIteration
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- All Implemented Interfaces:
AutoCloseable,CloseableIteration<BindingSet,QueryEvaluationException>,Iteration<BindingSet,QueryEvaluationException>
public class StatementConversionIteration extends AbstractCloseableIteration<BindingSet,QueryEvaluationException>
Converts Statement iteration (i.e. RepositoryResult) into the corresponding binding set. Note that exceptions are converted appropriately as well.- Author:
- Andreas Schwarte
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Field Summary
Fields Modifier and Type Field Description protected BindingSetbindingsprotected RepositoryResult<Statement>repoResultprotected StatementPatternstmtprotected booleanupdateContextprotected booleanupdateObjprotected booleanupdatePredprotected booleanupdateSubj
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Constructor Summary
Constructors Constructor Description StatementConversionIteration(RepositoryResult<Statement> repoResult, BindingSet bindings, StatementPattern stmt)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected BindingSetconvert(Statement st)protected QueryEvaluationExceptionconvertException(Exception e)protected voidhandleClose()Called byAbstractCloseableIteration.close()when it is called for the first time.booleanhasNext()Returns true if the iteration has more elements.protected voidinit()BindingSetnext()Returns the next element in the iteration.voidremove()Removes from the underlying collection the last element returned by the iteration (optional operation).-
Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration
close, isClosed
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Field Detail
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repoResult
protected final RepositoryResult<Statement> repoResult
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bindings
protected final BindingSet bindings
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stmt
protected final StatementPattern stmt
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updateSubj
protected boolean updateSubj
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updatePred
protected boolean updatePred
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updateObj
protected boolean updateObj
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updateContext
protected boolean updateContext
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Constructor Detail
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StatementConversionIteration
public StatementConversionIteration(RepositoryResult<Statement> repoResult, BindingSet bindings, StatementPattern stmt)
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Method Detail
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init
protected void init()
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hasNext
public boolean hasNext() throws QueryEvaluationExceptionDescription copied from interface:IterationReturns true if the iteration has more elements. (In other words, returns true ifIteration.next()would return an element rather than throwing a NoSuchElementException.)- Returns:
- true if the iteration has more elements.
- Throws:
QueryEvaluationException
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next
public BindingSet next() throws QueryEvaluationException
Description copied from interface:IterationReturns the next element in the iteration.- Returns:
- the next element in the iteration.
- Throws:
QueryEvaluationException
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remove
public void remove() throws QueryEvaluationExceptionDescription copied from interface:IterationRemoves from the underlying collection the last element returned by the iteration (optional operation). This method can be called only once per call to next.- Throws:
QueryEvaluationException
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handleClose
protected void handleClose() throws QueryEvaluationExceptionDescription copied from class:AbstractCloseableIterationCalled 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:
handleClosein classAbstractCloseableIteration<BindingSet,QueryEvaluationException>- Throws:
QueryEvaluationException
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convert
protected BindingSet convert(Statement st)
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convertException
protected QueryEvaluationException convertException(Exception e)
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