Package org.eclipse.rdf4j.query.algebra
Class UnaryTupleOperator
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- org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
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- org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
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- All Implemented Interfaces:
Serializable,Cloneable,QueryModelNode,TupleExpr,VariableScopeChange
- Direct Known Subclasses:
DescribeOperator,Distinct,Extension,Filter,Group,MultiProjection,Order,Projection,QueryRoot,Reduced,Service,Slice
public abstract class UnaryTupleOperator extends AbstractQueryModelNode implements TupleExpr
An abstract superclass for unary tuple operators which, by definition, has one argument.- See Also:
- Serialized Form
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Constructor Summary
Constructors Modifier Constructor Description protectedUnaryTupleOperator()protectedUnaryTupleOperator(TupleExpr arg)Creates a new unary tuple operator.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description UnaryTupleOperatorclone()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.TupleExprgetArg()Gets the argument of this unary tuple operator.Set<String>getAssuredBindingNames()Gets the names of the bindings that are guaranteed to be present in the results produced by this tuple expression.Set<String>getBindingNames()Gets the names of the bindings that are, or can be, returned by this tuple expression when it is evaluated.inthashCode()voidreplaceChildNode(QueryModelNode current, QueryModelNode replacement)Replaces one of the child nodes with a new node.voidsetArg(TupleExpr arg)Sets the argument of this unary tuple 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 TupleExpr arg
The operator's argument.
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Constructor Detail
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UnaryTupleOperator
protected UnaryTupleOperator()
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UnaryTupleOperator
protected UnaryTupleOperator(TupleExpr arg)
Creates a new unary tuple operator.- Parameters:
arg- The operator's argument, must not be null.
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Method Detail
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getArg
public TupleExpr getArg()
Gets the argument of this unary tuple operator.- Returns:
- The operator's argument.
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setArg
public void setArg(TupleExpr arg)
Sets the argument of this unary tuple operator.- Parameters:
arg- The (new) argument for this operator, must not be null.
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getBindingNames
public Set<String> getBindingNames()
Description copied from interface:TupleExprGets the names of the bindings that are, or can be, returned by this tuple expression when it is evaluated.- Specified by:
getBindingNamesin interfaceTupleExpr- Returns:
- A set of binding names.
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getAssuredBindingNames
public Set<String> getAssuredBindingNames()
Description copied from interface:TupleExprGets the names of the bindings that are guaranteed to be present in the results produced by this tuple expression.- Specified by:
getAssuredBindingNamesin interfaceTupleExpr- Returns:
- A set of binding names.
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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 UnaryTupleOperator 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 classAbstractQueryModelNode- Returns:
- A deep clone of this query model node.
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