Package org.eclipse.rdf4j.query.algebra
Class Slice
java.lang.Object
org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
org.eclipse.rdf4j.query.algebra.Slice
- All Implemented Interfaces:
Serializable,Cloneable,GraphPatternGroupable,QueryModelNode,TupleExpr,VariableScopeChange
The SLICE operator, as defined in SPARQL Query
Language for RDF. The SLICE operator selects specific results from the underlying tuple expression based on an
offset and limit value (both optional).
- Author:
- Arjohn Kampman
- See Also:
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Field Summary
Fields inherited from class org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
arg -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionclone()Returns a (deep) clone of this query model node.booleanReturns true if this query model node and its children are recursively equal to o and its children.longgetLimit()longDefault implementation ofQueryModelNode.getSignature()that prints the name of the node's class.inthashCode()booleanhasLimit()Checks whether the row selection has a (valid) limit.booleanChecks whether the row selection has a (valid) offset.voidsetLimit(long limit) voidsetOffset(long offset) <X extends Exception>
voidvisit(QueryModelVisitor<X> visitor) Visits this node.Methods inherited from class org.eclipse.rdf4j.query.algebra.UnaryTupleOperator
getArg, getAssuredBindingNames, getBindingNames, replaceChildNode, setArg, visitChildrenMethods inherited from class org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode
getCardinality, getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getTotalTimeNanosActual, isCardinalitySet, isGraphPatternGroup, isVariableScopeChange, nullEquals, replaceNodeInList, replaceWith, resetCardinality, setCardinality, setCostEstimate, setGraphPatternGroup, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, setVariableScopeChange, shouldCacheCardinality, toStringMethods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, waitMethods inherited from interface org.eclipse.rdf4j.query.algebra.QueryModelNode
getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getTotalTimeNanosActual, replaceWith, setCostEstimate, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString
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Constructor Details
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Slice
public Slice() -
Slice
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Slice
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Method Details
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getOffset
public long getOffset() -
setOffset
public void setOffset(long offset) -
hasOffset
public boolean hasOffset()Checks whether the row selection has a (valid) offset.- Returns:
- true when offset > 0
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getLimit
public long getLimit() -
setLimit
public void setLimit(long limit) -
hasLimit
public boolean hasLimit()Checks whether the row selection has a (valid) limit.- Returns:
- true when offset >= 0
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visit
Description copied from interface:QueryModelNodeVisits this node. The node reports itself to the visitor with the proper runtime type.- Throws:
X extends Exception
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getSignature
Description copied from class:AbstractQueryModelNodeDefault implementation ofQueryModelNode.getSignature()that prints the name of the node's class.- Specified by:
getSignaturein interfaceQueryModelNode- Overrides:
getSignaturein classAbstractQueryModelNode- Returns:
- The node's signature, e.g. SLICE (offset=10, limit=10).
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equals
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 classUnaryTupleOperator
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hashCode
public int hashCode()- Overrides:
hashCodein classUnaryTupleOperator
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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 classUnaryTupleOperator- Returns:
- A deep clone of this query model node.
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