Package org.eclipse.rdf4j.query.algebra
Class QueryRoot
java.lang.Object
org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
org.eclipse.rdf4j.query.algebra.QueryRoot
- All Implemented Interfaces:
Serializable,Cloneable,GraphPatternGroupable,QueryModelNode,TupleExpr,VariableScopeChange
- Direct Known Subclasses:
PrecompiledQueryNode
A semantics-less query model node that is used as the root of query model trees. This is a placeholder that
facilitates modifications to query model trees, including the replacement of the actual (semantically relevant) root
node with another root node.
- Author:
- Arjohn Kampman
- See Also:
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Field Summary
Fields inherited from class org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
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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()voidsetParentNode(QueryModelNode parent) Sets the node's parent.<X extends Exception>
voidvisit(QueryModelVisitor<X> visitor) Visits this node.Methods inherited from class org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
getArg, getAssuredBindingNames, getBindingNames, replaceChildNode, setArg, 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, 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, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString
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Constructor Details
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QueryRoot
public QueryRoot() -
QueryRoot
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Method Details
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setParentNode
Description copied from interface:QueryModelNodeSets the node's parent.- Specified by:
setParentNodein interfaceQueryModelNode- Overrides:
setParentNodein classAbstractQueryModelNode- Parameters:
parent- The parent node for this node.
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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 classUnaryTupleOperator
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hashCode
public int hashCode()- Overrides:
hashCodein classUnaryTupleOperator
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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 interfaceTupleExpr- Overrides:
clonein classUnaryTupleOperator- Returns:
- A deep clone of this query model node.
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