Class DescribeIteration

java.lang.Object

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

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

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

All Implemented Interfaces:

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

@Deprecated(since="4.1.0")
public class DescribeIteration
extends LookAheadIteration<BindingSet, QueryEvaluationException>

Deprecated.

Iteration that implements a simplified version of Symmetric Concise Bounded Description (omitting reified statements).

See Also:

• Concise Bounded Description - alternatives

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static enum	DescribeIteration.Mode	Deprecated.

Field Summary

Fields

Modifier and Type	Field	Description
private BindingSet	currentBindings	Deprecated.
private CloseableIteration<BindingSet, QueryEvaluationException>	currentDescribeExprIter	Deprecated.
private DescribeIteration.Mode	currentMode	Deprecated.
private final List<String>	describeExprNames	Deprecated.
private int	describeExprsIndex	Deprecated.
private final Queue<BNode>	nodeQueue	Deprecated.
protected BindingSet	parentBindings	Deprecated.
private final Set<BNode>	processedNodes	Deprecated.
private final Iteration<BindingSet, QueryEvaluationException>	sourceIter	Deprecated.
private Value	startValue	Deprecated.
private final EvaluationStrategy	strategy	Deprecated.
protected static final String	VARNAME_OBJECT	Deprecated.
protected static final String	VARNAME_PREDICATE	Deprecated.
protected static final String	VARNAME_SUBJECT	Deprecated.

Constructor Summary

Constructors

Constructor	Description
DescribeIteration(Iteration<BindingSet, QueryEvaluationException> sourceIter, EvaluationStrategy strategy, Set<String> describeExprNames, BindingSet parentBindings)	Deprecated.

Method Summary

Modifier and Type	Method	Description
protected CloseableIteration<BindingSet, QueryEvaluationException>	createNextIteration(Value subject, Value object)	Deprecated.
protected BindingSet	getNextElement()	Deprecated. Gets the next element.
protected void	handleClose()	Deprecated. Called by AbstractCloseableIteration.close() when it is called for the first time.
private void	resetCurrentDescribeExprIter()	Deprecated.

Methods inherited from class LookAheadIteration

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

VARNAME_SUBJECT

protected static final String VARNAME_SUBJECT

Deprecated.

See Also:

• Constant Field Values

VARNAME_PREDICATE

protected static final String VARNAME_PREDICATE

Deprecated.

See Also:

• Constant Field Values

VARNAME_OBJECT

protected static final String VARNAME_OBJECT

Deprecated.

See Also:

• Constant Field Values

describeExprNames

private final List<String> describeExprNames

Deprecated.

strategy

private final EvaluationStrategy strategy

Deprecated.

startValue

private Value startValue

Deprecated.

nodeQueue

private final Queue<BNode> nodeQueue

Deprecated.

processedNodes

private final Set<BNode> processedNodes

Deprecated.

currentDescribeExprIter

private CloseableIteration<BindingSet, QueryEvaluationException> currentDescribeExprIter

Deprecated.

currentMode

private DescribeIteration.Mode currentMode

Deprecated.

sourceIter

private final Iteration<BindingSet, QueryEvaluationException> sourceIter

Deprecated.

currentBindings

private BindingSet currentBindings

Deprecated.

describeExprsIndex

private int describeExprsIndex

Deprecated.

parentBindings

protected BindingSet parentBindings

Deprecated.

Constructor Details

DescribeIteration

public DescribeIteration(Iteration<BindingSet, QueryEvaluationException> sourceIter,
 EvaluationStrategy strategy,
 Set<String> describeExprNames,
 BindingSet parentBindings)

Deprecated.

Method Details

resetCurrentDescribeExprIter

private void resetCurrentDescribeExprIter()
                                   throws QueryEvaluationException

Deprecated.

Throws:

QueryEvaluationException

getNextElement

protected BindingSet getNextElement()
                             throws QueryEvaluationException

Deprecated.

Description copied from class: LookAheadIteration

Gets the next element. Subclasses should implement this method so that it returns the next element.

Specified by:

getNextElement in class LookAheadIteration<BindingSet, QueryEvaluationException>

Returns:

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

Throws:

QueryEvaluationException

createNextIteration

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

Deprecated.

Throws:

QueryEvaluationException

handleClose

protected void handleClose()
                    throws QueryEvaluationException

Deprecated.

Description copied from class: AbstractCloseableIteration

Called by AbstractCloseableIteration.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 class LookAheadIteration<BindingSet, QueryEvaluationException>

Throws:

QueryEvaluationException