Class ZeroLengthPathIteration
- 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<BindingSet,QueryEvaluationException>
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- org.eclipse.rdf4j.query.algebra.evaluation.iterator.ZeroLengthPathIteration
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- All Implemented Interfaces:
java.lang.AutoCloseable
,CloseableIteration<BindingSet,QueryEvaluationException>
,Iteration<BindingSet,QueryEvaluationException>
public class ZeroLengthPathIteration extends LookAheadIteration<BindingSet,QueryEvaluationException>
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Field Summary
Fields Modifier and Type Field Description static java.lang.String
ANON_OBJECT_VAR
static java.lang.String
ANON_PREDICATE_VAR
static java.lang.String
ANON_SEQUENCE_VAR
static java.lang.String
ANON_SUBJECT_VAR
private BindingSet
bindings
private QueryEvaluationContext
context
private Var
contextVar
private EvaluationStrategy
evaluationStrategy
private CloseableIteration<BindingSet,QueryEvaluationException>
iter
private Value
obj
private static Literal
OBJECT
private QueryEvaluationStep
precompile
private java.util.Set<Value>
reportedValues
private QueryBindingSet
result
private java.util.function.BiConsumer<Value,MutableBindingSet>
setContext
private java.util.function.BiConsumer<Value,MutableBindingSet>
setObject
private java.util.function.BiConsumer<Value,MutableBindingSet>
setSubject
private Value
subj
private static Literal
SUBJECT
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Constructor Summary
Constructors Constructor Description ZeroLengthPathIteration(EvaluationStrategy evaluationStrategyImpl, Var subjectVar, Var objVar, Value subj, Value obj, Var contextVar, BindingSet bindings, QueryEvaluationContext context)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Var
createAnonVar(java.lang.String varName)
private CloseableIteration<BindingSet,QueryEvaluationException>
createIteration()
protected BindingSet
getNextElement()
Gets the next element.-
Methods inherited from class org.eclipse.rdf4j.common.iteration.LookAheadIteration
handleClose, hasNext, next, remove
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Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration
close, isClosed
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.eclipse.rdf4j.common.iteration.CloseableIteration
stream
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Field Detail
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OBJECT
private static final Literal OBJECT
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SUBJECT
private static final Literal SUBJECT
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ANON_SUBJECT_VAR
public static final java.lang.String ANON_SUBJECT_VAR
- See Also:
- Constant Field Values
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ANON_PREDICATE_VAR
public static final java.lang.String ANON_PREDICATE_VAR
- See Also:
- Constant Field Values
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ANON_OBJECT_VAR
public static final java.lang.String ANON_OBJECT_VAR
- See Also:
- Constant Field Values
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ANON_SEQUENCE_VAR
public static final java.lang.String ANON_SEQUENCE_VAR
- See Also:
- Constant Field Values
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result
private QueryBindingSet result
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subj
private final Value subj
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obj
private final Value obj
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bindings
private final BindingSet bindings
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iter
private CloseableIteration<BindingSet,QueryEvaluationException> iter
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reportedValues
private java.util.Set<Value> reportedValues
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contextVar
private final Var contextVar
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evaluationStrategy
private final EvaluationStrategy evaluationStrategy
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precompile
private final QueryEvaluationStep precompile
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context
private final QueryEvaluationContext context
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setSubject
private final java.util.function.BiConsumer<Value,MutableBindingSet> setSubject
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setObject
private final java.util.function.BiConsumer<Value,MutableBindingSet> setObject
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setContext
private final java.util.function.BiConsumer<Value,MutableBindingSet> setContext
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Constructor Detail
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ZeroLengthPathIteration
public ZeroLengthPathIteration(EvaluationStrategy evaluationStrategyImpl, Var subjectVar, Var objVar, Value subj, Value obj, Var contextVar, BindingSet bindings, QueryEvaluationContext context)
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Method Detail
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getNextElement
protected BindingSet getNextElement() throws QueryEvaluationException
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 classLookAheadIteration<BindingSet,QueryEvaluationException>
- Returns:
- The next element, or null if no more elements are available.
- Throws:
QueryEvaluationException
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createIteration
private CloseableIteration<BindingSet,QueryEvaluationException> createIteration() throws QueryEvaluationException
- Throws:
QueryEvaluationException
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createAnonVar
public Var createAnonVar(java.lang.String varName)
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