Package org.eclipse.rdf4j.query.algebra
Class Exists
java.lang.Object
org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
org.eclipse.rdf4j.query.algebra.SubQueryValueOperator
org.eclipse.rdf4j.query.algebra.Exists
- All Implemented Interfaces:
Serializable,Cloneable,GraphPatternGroupable,QueryModelNode,ValueExpr,VariableScopeChange
Checks whether the wrapped Query produces any results.
- See Also:
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Field Summary
Fields inherited from class org.eclipse.rdf4j.query.algebra.SubQueryValueOperator
subQuery -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionclone()Returns a (deep) clone of this query model node.booleanReturns true if this query model node and its children are recursively equal to o and its children.inthashCode()<X extends Exception>
voidvisit(QueryModelVisitor<X> visitor) Visits this node.Methods inherited from class org.eclipse.rdf4j.query.algebra.SubQueryValueOperator
getSubQuery, replaceChildNode, setSubQuery, visitChildrenMethods inherited from class org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
getCardinality, getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getSignature, getTotalTimeNanosActual, isCardinalitySet, isGraphPatternGroup, isVariableScopeChange, nullEquals, replaceNodeInList, replaceWith, resetCardinality, setCardinality, setCostEstimate, setGraphPatternGroup, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, setVariableScopeChange, shouldCacheCardinality, toStringMethods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, waitMethods inherited from interface org.eclipse.rdf4j.query.algebra.QueryModelNode
getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getSignature, getTotalTimeNanosActual, replaceWith, setCostEstimate, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString
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Constructor Details
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Exists
public Exists() -
Exists
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Method Details
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visit
Description copied from interface:QueryModelNodeVisits this node. The node reports itself to the visitor with the proper runtime type.- Throws:
X extends Exception
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equals
Description copied from interface:QueryModelNodeReturns true if this query model node and its children are recursively equal to o and its children.- Specified by:
equalsin interfaceQueryModelNode- Overrides:
equalsin classSubQueryValueOperator
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hashCode
public int hashCode()- Overrides:
hashCodein classSubQueryValueOperator
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clone
Description copied from interface:QueryModelNodeReturns a (deep) clone of this query model node. This method recursively clones the entire node tree, starting from this nodes.- Specified by:
clonein interfaceQueryModelNode- Specified by:
clonein interfaceValueExpr- Overrides:
clonein classSubQueryValueOperator- Returns:
- A deep clone of this query model node.
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