Package org.eclipse.rdf4j.query.algebra

Class AbstractAggregateOperator

java.lang.Object

org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

org.eclipse.rdf4j.query.algebra.UnaryValueOperator

org.eclipse.rdf4j.query.algebra.AbstractAggregateOperator

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

Field Summary

Fields inherited from class org.eclipse.rdf4j.query.algebra.UnaryValueOperator

arg

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractAggregateOperator(ValueExpr arg)
protected	AbstractAggregateOperator(ValueExpr arg, boolean distinct)

Method Summary

Modifier and Type	Method	Description
AbstractAggregateOperator	clone()	Returns a (deep) clone of this query model node.
boolean	equals(Object o)	Returns true if this query model node and its children are recursively equal to o and its children.
int	hashCode()
boolean	isDistinct()
void	setDistinct(boolean distinct)

Methods inherited from class org.eclipse.rdf4j.query.algebra.UnaryValueOperator

getArg, replaceChildNode, setArg, visitChildren

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, replaceChildNode, replaceWith, setCostEstimate, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString, visit, visitChildren

Constructor Details

AbstractAggregateOperator

protected AbstractAggregateOperator(ValueExpr arg)

AbstractAggregateOperator

protected AbstractAggregateOperator(ValueExpr arg,
 boolean distinct)

Method Details

setDistinct

public void setDistinct(boolean distinct)

Specified by:

setDistinct in interface AggregateOperator

isDistinct

public boolean isDistinct()

Specified by:

isDistinct in interface AggregateOperator

equals

public boolean equals(Object o)

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 interface QueryModelNode

Overrides:

equals in class UnaryValueOperator

hashCode

public int hashCode()

Overrides:

hashCode in class UnaryValueOperator

clone

public AbstractAggregateOperator 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 interface AggregateOperator

Specified by:

clone in interface QueryModelNode

Specified by:

clone in interface ValueExpr

Overrides:

clone in class UnaryValueOperator

Returns:

A deep clone of this query model node.