Package org.eclipse.rdf4j.federated.evaluation.iterator

Class FederatedDescribeIteration

java.lang.Object

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

org.eclipse.rdf4j.common.iteration.LookAheadIteration<BindingSet,QueryEvaluationException>

org.eclipse.rdf4j.query.algebra.evaluation.iterator.DescribeIteration

org.eclipse.rdf4j.federated.evaluation.iterator.FederatedDescribeIteration

All Implemented Interfaces:

AutoCloseable, CloseableIteration<BindingSet,QueryEvaluationException>, Iteration<BindingSet,QueryEvaluationException>

public class FederatedDescribeIteration
extends DescribeIteration

Specialized DescribeIteration for evaluation of DESCRIBE queries in the federation. ‚

Author:

Andreas Schwarte

Field Summary

Fields inherited from class org.eclipse.rdf4j.query.algebra.evaluation.iterator.DescribeIteration

parentBindings, VARNAME_OBJECT, VARNAME_PREDICATE, VARNAME_SUBJECT

Constructor Summary

Constructors

Constructor	Description
FederatedDescribeIteration(Iteration<BindingSet,QueryEvaluationException> sourceIter, FederationEvalStrategy strategy, Set<String> describeExprNames, BindingSet parentBindings, QueryInfo queryInfo)

Method Summary

Modifier and Type	Method	Description
protected CloseableIteration<BindingSet,QueryEvaluationException>	createNextIteration(Value subject, Value object)

Methods inherited from class org.eclipse.rdf4j.query.algebra.evaluation.iterator.DescribeIteration

getNextElement

Methods inherited from class org.eclipse.rdf4j.common.iteration.LookAheadIteration

handleClose, hasNext, next, remove

Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration

close, isClosed

Methods inherited from class java.lang.Object

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

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

stream

Constructor Details

FederatedDescribeIteration

public FederatedDescribeIteration(Iteration<BindingSet,QueryEvaluationException> sourceIter,
 FederationEvalStrategy strategy,
 Set<String> describeExprNames,
 BindingSet parentBindings,
 QueryInfo queryInfo)

Method Details

createNextIteration

protected CloseableIteration<BindingSet,QueryEvaluationException> createNextIteration(Value subject,
 Value object)
                                                                               throws QueryEvaluationException

Overrides:

createNextIteration in class DescribeIteration

Throws:

QueryEvaluationException