Package org.eclipse.rdf4j.query.algebra
Class Var
- java.lang.Object
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- org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
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- org.eclipse.rdf4j.query.algebra.Var
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- All Implemented Interfaces:
Serializable,Cloneable,QueryModelNode,ValueExpr,VariableScopeChange
public class Var extends AbstractQueryModelNode implements ValueExpr
A variable that can contain a Value.- See Also:
- Serialized Form
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Varclone()Returns a (deep) clone of this query model node.booleanequals(Object o)Returns true if this query model node and its children are recursively equal to o and its children.StringgetName()StringgetSignature()Default implementation ofQueryModelNode.getSignature()that prints the name of the node's class.ValuegetValue()inthashCode()booleanhasValue()booleanisAnonymous()booleanisConstant()voidreplaceChildNode(QueryModelNode current, QueryModelNode replacement)Replaces one of the child nodes with a new node.voidsetParentNode(QueryModelNode parent)Sets the node's parent.<X extends Exception>
voidvisit(QueryModelVisitor<X> visitor)Visits this node.<X extends Exception>
voidvisitChildren(QueryModelVisitor<X> visitor)Visits the children of this node.-
Methods inherited from class org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
getCardinality, getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getTotalTimeNanosActual, isCardinalitySet, isVariableScopeChange, nullEquals, replaceNodeInList, replaceWith, resetCardinality, setCardinality, setCostEstimate, 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, getTotalTimeNanosActual, replaceWith, setCostEstimate, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString
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Method Detail
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isAnonymous
public boolean isAnonymous()
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getName
public String getName()
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hasValue
public boolean hasValue()
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getValue
public Value getValue()
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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.- Specified by:
visitin interfaceQueryModelNode- Throws:
X extends Exception
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visitChildren
public <X extends Exception> void visitChildren(QueryModelVisitor<X> visitor) throws X extends Exception
Description copied from interface:QueryModelNodeVisits the children of this node. The node callsQueryModelNode.visit(QueryModelVisitor)on all of its child nodes.- Specified by:
visitChildrenin interfaceQueryModelNode- Throws:
X extends Exception
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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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replaceChildNode
public void replaceChildNode(QueryModelNode current, QueryModelNode replacement)
Description copied from interface:QueryModelNodeReplaces one of the child nodes with a new node.- Specified by:
replaceChildNodein interfaceQueryModelNode- Parameters:
current- The current child node.replacement- The new child node.
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getSignature
public String getSignature()
Description copied from class:AbstractQueryModelNodeDefault implementation ofQueryModelNode.getSignature()that prints the name of the node's class.- Specified by:
getSignaturein interfaceQueryModelNode- Overrides:
getSignaturein classAbstractQueryModelNode- Returns:
- The node's signature, e.g. SLICE (offset=10, limit=10).
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equals
public boolean equals(Object o)
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 classObject
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clone
public Var 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 classAbstractQueryModelNode- Returns:
- A deep clone of this query model node.
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isConstant
public boolean isConstant()
- Returns:
- Returns the constant.
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