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 Var
clone()
Returns a (deep) clone of this query model node.boolean
equals(Object o)
Returns true if this query model node and its children are recursively equal to o and its children.String
getName()
String
getSignature()
Default implementation ofQueryModelNode.getSignature()
that prints the name of the node's class.Value
getValue()
int
hashCode()
boolean
hasValue()
boolean
isAnonymous()
boolean
isConstant()
void
replaceChildNode(QueryModelNode current, QueryModelNode replacement)
Replaces one of the child nodes with a new node.void
setParentNode(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:QueryModelNode
Visits this node. The node reports itself to the visitor with the proper runtime type.- Specified by:
visit
in 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:QueryModelNode
Visits the children of this node. The node callsQueryModelNode.visit(QueryModelVisitor)
on all of its child nodes.- Specified by:
visitChildren
in interfaceQueryModelNode
- Throws:
X extends Exception
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setParentNode
public void setParentNode(QueryModelNode parent)
Description copied from interface:QueryModelNode
Sets the node's parent.- Specified by:
setParentNode
in interfaceQueryModelNode
- Overrides:
setParentNode
in 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:QueryModelNode
Replaces one of the child nodes with a new node.- Specified by:
replaceChildNode
in interfaceQueryModelNode
- Parameters:
current
- The current child node.replacement
- The new child node.
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getSignature
public String getSignature()
Description copied from class:AbstractQueryModelNode
Default implementation ofQueryModelNode.getSignature()
that prints the name of the node's class.- Specified by:
getSignature
in interfaceQueryModelNode
- Overrides:
getSignature
in 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:QueryModelNode
Returns true if this query model node and its children are recursively equal to o and its children.- Specified by:
equals
in interfaceQueryModelNode
- Overrides:
equals
in classObject
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clone
public Var clone()
Description copied from interface:QueryModelNode
Returns a (deep) clone of this query model node. This method recursively clones the entire node tree, starting from this nodes.- Specified by:
clone
in interfaceQueryModelNode
- Specified by:
clone
in interfaceValueExpr
- Overrides:
clone
in 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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