Package org.eclipse.rdf4j.query.algebra
Class UnaryValueOperator
- java.lang.Object
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- org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
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- org.eclipse.rdf4j.query.algebra.UnaryValueOperator
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- All Implemented Interfaces:
Serializable,Cloneable,QueryModelNode,ValueExpr,VariableScopeChange
- Direct Known Subclasses:
AbstractAggregateOperator,Datatype,IRIFunction,IsBNode,IsLiteral,IsNumeric,IsResource,IsURI,Label,Lang,LocalName,Namespace,Not,Str
public abstract class UnaryValueOperator extends AbstractQueryModelNode implements ValueExpr
An abstract superclass for unary value operators which, by definition, has one argument. In special cases the argument can be null, for instance to represent the argument * in COUNT(*).- See Also:
- Serialized Form
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Constructor Summary
Constructors Modifier Constructor Description protectedUnaryValueOperator()protectedUnaryValueOperator(ValueExpr arg)Creates a new unary value operator.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description UnaryValueOperatorclone()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.ValueExprgetArg()Gets the argument of this unary value operator.inthashCode()voidreplaceChildNode(QueryModelNode current, QueryModelNode replacement)Replaces one of the child nodes with a new node.voidsetArg(ValueExpr arg)Sets the argument of this unary value operator.<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, getSignature, getTotalTimeNanosActual, isCardinalitySet, isVariableScopeChange, nullEquals, replaceNodeInList, replaceWith, resetCardinality, setCardinality, setCostEstimate, setParentNode, 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, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString, visit
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Field Detail
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arg
protected ValueExpr arg
The operator's argument.
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Constructor Detail
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UnaryValueOperator
protected UnaryValueOperator()
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UnaryValueOperator
protected UnaryValueOperator(ValueExpr arg)
Creates a new unary value operator.- Parameters:
arg- The operator's argument, must not be null.
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Method Detail
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getArg
public ValueExpr getArg()
Gets the argument of this unary value operator.- Returns:
- The operator's argument.
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setArg
public void setArg(ValueExpr arg)
Sets the argument of this unary value operator.- Parameters:
arg- The (new) argument for this operator, must not be null.
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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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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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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 UnaryValueOperator 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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