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

Class BoundJoinVALUESConversionIteration

java.lang.Object

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

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

org.eclipse.rdf4j.federated.evaluation.iterator.BoundJoinVALUESConversionIteration

All Implemented Interfaces:

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

public class BoundJoinVALUESConversionIteration
extends ConvertingIteration<BindingSet,BindingSet,QueryEvaluationException>

Inserts original bindings into the result. This implementation is used for bound joins with VALUES clauses, see SparqlFederationEvalStrategyWithValues.

It is assumed the the query results contain a binding for "?__index" which corresponds to the index in the input mappings. See QueryStringUtil for details

Since:

3.0

Author:

Andreas Schwarte

See Also:

• SparqlFederationEvalStrategy

Field Summary

Fields

Modifier and Type	Field	Description
protected final List<BindingSet>	bindings
static final String	INDEX_BINDING_NAME	The binding name for the index

Constructor Summary

Constructors

Constructor	Description
BoundJoinVALUESConversionIteration(CloseableIteration<BindingSet,QueryEvaluationException> iter, List<BindingSet> bindings)

Method Summary

Modifier and Type	Method	Description
protected BindingSet	convert(BindingSet bIn)	Converts a source type object to a target type object.

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

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

Field Details

INDEX_BINDING_NAME

public static final String INDEX_BINDING_NAME

The binding name for the index

See Also:

• Constant Field Values

bindings

protected final List<BindingSet> bindings

Constructor Details

BoundJoinVALUESConversionIteration

public BoundJoinVALUESConversionIteration(CloseableIteration<BindingSet,QueryEvaluationException> iter,
 List<BindingSet> bindings)

Method Details

convert

protected BindingSet convert(BindingSet bIn)
                      throws QueryEvaluationException

Description copied from class: ConvertingIteration

Converts a source type object to a target type object.

Specified by:

convert in class ConvertingIteration<BindingSet,BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException