Package org.eclipse.rdf4j.query.algebra
Class QueryRoot
- java.lang.Object
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- org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
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- org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
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- org.eclipse.rdf4j.query.algebra.QueryRoot
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- All Implemented Interfaces:
Serializable,Cloneable,GraphPatternGroupable,QueryModelNode,TupleExpr,VariableScopeChange
- Direct Known Subclasses:
PrecompiledQueryNode
public class QueryRoot extends UnaryTupleOperator
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:
- Serialized Form
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Field Summary
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Fields inherited from class org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
arg
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description QueryRootclone()Returns a (deep) clone of this query model node.booleanequals(Object other)Returns 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, visitChildren
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Methods 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, toString
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Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods 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 Detail
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QueryRoot
public QueryRoot()
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QueryRoot
public QueryRoot(TupleExpr tupleExpr)
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Method Detail
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setParentNode
public void setParentNode(QueryModelNode parent)
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
public <X extends Exception> void visit(QueryModelVisitor<X> visitor) throws X extends Exception
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
public boolean equals(Object other)
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
public QueryRoot 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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