Package org.eclipse.rdf4j.query.algebra
Class Projection
java.lang.Object
org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
org.eclipse.rdf4j.query.algebra.Projection
- All Implemented Interfaces:
Serializable
,Cloneable
,QueryModelNode
,TupleExpr
,VariableScopeChange
A generalized projection (allowing the bindings to be renamed) on a tuple expression.
- See Also:
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Field Summary
Fields inherited from class org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
arg
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Constructor Summary
ConstructorDescriptionProjection
(TupleExpr arg) Projection
(TupleExpr arg, ProjectionElemList elements) Projection
(TupleExpr arg, ProjectionElemList elements, boolean subquery) -
Method Summary
Modifier and TypeMethodDescriptionclone()
Returns a (deep) clone of this query model node.boolean
Returns true if this query model node and its children are recursively equal to o and its children.Gets the names of the bindings that are guaranteed to be present in the results produced by this tuple expression.Gets the names of the bindings that are, or can be, returned by this tuple expression when it is evaluated.int
hashCode()
boolean
void
replaceChildNode
(QueryModelNode current, QueryModelNode replacement) Replaces one of the child nodes with a new node.void
setProjectionContext
(Var projectionContext) void
setProjectionElemList
(ProjectionElemList projElemList) void
setSubquery
(boolean subquery) <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.UnaryTupleOperator
getArg, getOrder, getSupportedOrders, setArg, setOrder
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
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
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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Constructor Details
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Projection
public Projection() -
Projection
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Projection
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Projection
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Method Details
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getProjectionElemList
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setProjectionElemList
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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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getAssuredBindingNames
Description copied from interface:TupleExpr
Gets the names of the bindings that are guaranteed to be present in the results produced by this tuple expression.- Specified by:
getAssuredBindingNames
in interfaceTupleExpr
- Overrides:
getAssuredBindingNames
in classUnaryTupleOperator
- Returns:
- A set of binding names.
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visit
Description copied from interface:QueryModelNode
Visits this node. The node reports itself to the visitor with the proper runtime type.- Throws:
X
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visitChildren
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
- Overrides:
visitChildren
in classUnaryTupleOperator
- Throws:
X
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replaceChildNode
Description copied from interface:QueryModelNode
Replaces one of the child nodes with a new 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
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
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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getProjectionContext
- Returns:
- Returns the projectionContext.
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setProjectionContext
- Parameters:
projectionContext
- The projectionContext to set.
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isSubquery
public boolean isSubquery() -
setSubquery
public void setSubquery(boolean subquery)
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