Package org.eclipse.rdf4j.query.algebra
Class Extension
- 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.Extension
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Cloneable
,GraphPatternGroupable
,QueryModelNode
,TupleExpr
,VariableScopeChange
public class Extension extends UnaryTupleOperator
An extension operator that can be used to add bindings to solutions whose values are defined byvalue expressions
.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description private java.util.List<ExtensionElem>
elements
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Fields inherited from class org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
arg
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Constructor Summary
Constructors Constructor Description Extension()
Extension(TupleExpr arg)
Extension(TupleExpr arg, java.lang.Iterable<ExtensionElem> elements)
Extension(TupleExpr arg, ExtensionElem... elements)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
addElement(ExtensionElem pe)
void
addElements(java.lang.Iterable<ExtensionElem> elements)
void
addElements(ExtensionElem... elements)
Extension
clone()
Returns a (deep) clone of this query model node.boolean
equals(java.lang.Object other)
Returns true if this query model node and its children are recursively equal to o and its children.java.util.Set<java.lang.String>
getBindingNames()
Gets the names of the bindings that are, or can be, returned by this tuple expression when it is evaluated.java.util.List<ExtensionElem>
getElements()
int
hashCode()
void
replaceChildNode(QueryModelNode current, QueryModelNode replacement)
Default implementation ofQueryModelNode.replaceChildNode(QueryModelNode, QueryModelNode)
that throws anIllegalArgumentException
indicating that current is not a child node of this node.void
setElements(java.lang.Iterable<ExtensionElem> elements)
<X extends java.lang.Exception>
voidvisit(QueryModelVisitor<X> visitor)
Visits this node.<X extends java.lang.Exception>
voidvisitChildren(QueryModelVisitor<X> visitor)
Dummy implementation ofQueryModelNode.visitChildren(org.eclipse.rdf4j.query.algebra.QueryModelVisitor<X>)
that does nothing.-
Methods inherited from class org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
getArg, getAssuredBindingNames, setArg
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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, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, setVariableScopeChange, shouldCacheCardinality, toHumanReadbleNumber, 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
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Field Detail
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elements
private java.util.List<ExtensionElem> elements
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Constructor Detail
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Extension
public Extension()
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Extension
public Extension(TupleExpr arg)
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Extension
public Extension(TupleExpr arg, ExtensionElem... elements)
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Extension
public Extension(TupleExpr arg, java.lang.Iterable<ExtensionElem> elements)
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Method Detail
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getElements
public java.util.List<ExtensionElem> getElements()
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setElements
public void setElements(java.lang.Iterable<ExtensionElem> elements)
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addElements
public void addElements(ExtensionElem... elements)
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addElements
public void addElements(java.lang.Iterable<ExtensionElem> elements)
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addElement
public void addElement(ExtensionElem pe)
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getBindingNames
public java.util.Set<java.lang.String> getBindingNames()
Description copied from interface:TupleExpr
Gets the names of the bindings that are, or can be, returned by this tuple expression when it is evaluated.- Specified by:
getBindingNames
in interfaceTupleExpr
- Overrides:
getBindingNames
in classUnaryTupleOperator
- Returns:
- A set of binding names.
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visit
public <X extends java.lang.Exception> void visit(QueryModelVisitor<X> visitor) throws X extends java.lang.Exception
Description copied from interface:QueryModelNode
Visits this node. The node reports itself to the visitor with the proper runtime type.- Throws:
X extends java.lang.Exception
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visitChildren
public <X extends java.lang.Exception> void visitChildren(QueryModelVisitor<X> visitor) throws X extends java.lang.Exception
Description copied from class:AbstractQueryModelNode
Dummy implementation ofQueryModelNode.visitChildren(org.eclipse.rdf4j.query.algebra.QueryModelVisitor<X>)
that does nothing. Subclasses should override this method when they have child nodes.- Specified by:
visitChildren
in interfaceQueryModelNode
- Overrides:
visitChildren
in classUnaryTupleOperator
- Throws:
X extends java.lang.Exception
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replaceChildNode
public void replaceChildNode(QueryModelNode current, QueryModelNode replacement)
Description copied from class:AbstractQueryModelNode
Default implementation ofQueryModelNode.replaceChildNode(QueryModelNode, QueryModelNode)
that throws anIllegalArgumentException
indicating that current is not a child node of this node.- Specified by:
replaceChildNode
in interfaceQueryModelNode
- Overrides:
replaceChildNode
in classUnaryTupleOperator
- Parameters:
current
- The current child node.replacement
- The new child node.
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equals
public boolean equals(java.lang.Object other)
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 classUnaryTupleOperator
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hashCode
public int hashCode()
- Overrides:
hashCode
in classUnaryTupleOperator
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clone
public Extension 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 interfaceTupleExpr
- Overrides:
clone
in classUnaryTupleOperator
- Returns:
- A deep clone of this query model node.
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