Package org.eclipse.rdf4j.query.algebra
Class AbstractAggregateOperator
- 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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- org.eclipse.rdf4j.query.algebra.AbstractAggregateOperator
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- All Implemented Interfaces:
Serializable,Cloneable,AggregateOperator,QueryModelNode,ValueExpr,VariableScopeChange
- Direct Known Subclasses:
AggregateFunctionCall,Avg,Count,GroupConcat,Max,Min,Sample,Sum
public abstract class AbstractAggregateOperator extends UnaryValueOperator implements AggregateOperator
Base class for shared functionality of aggregate operators (e.g. DISTINCT setting)- Author:
- Jeen Broekstra
- See Also:
- Serialized Form
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Field Summary
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Fields inherited from class org.eclipse.rdf4j.query.algebra.UnaryValueOperator
arg
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Constructor Summary
Constructors Modifier Constructor Description protectedAbstractAggregateOperator(ValueExpr arg)protectedAbstractAggregateOperator(ValueExpr arg, boolean distinct)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description AbstractAggregateOperatorclone()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.inthashCode()booleanisDistinct()voidsetDistinct(boolean distinct)-
Methods inherited from class org.eclipse.rdf4j.query.algebra.UnaryValueOperator
getArg, replaceChildNode, setArg, visitChildren
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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, replaceChildNode, replaceWith, setCostEstimate, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString, visit, visitChildren
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Method Detail
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setDistinct
public void setDistinct(boolean distinct)
- Specified by:
setDistinctin interfaceAggregateOperator
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isDistinct
public boolean isDistinct()
- Specified by:
isDistinctin interfaceAggregateOperator
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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 classUnaryValueOperator
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hashCode
public int hashCode()
- Overrides:
hashCodein classUnaryValueOperator
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clone
public AbstractAggregateOperator 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 interfaceAggregateOperator- Specified by:
clonein interfaceQueryModelNode- Specified by:
clonein interfaceValueExpr- Overrides:
clonein classUnaryValueOperator- Returns:
- A deep clone of this query model node.
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