com.hp.hpl.jena.sparql.expr.aggregate
Class AggregatorBase

java.lang.Object
  com.hp.hpl.jena.sparql.expr.aggregate.AggregatorBase

All Implemented Interfaces:

Aggregator

Direct Known Subclasses:

AggAvg, AggAvgDistinct, AggCount, AggCountDistinct, AggCountVar, AggCountVarDistinct, AggGroupConcat, AggGroupConcatDistinct, AggMax, AggMaxDistinct, AggMin, AggMinDistinct, AggSample, AggSampleDistinct, AggSum, AggSumDistinct

public abstract class AggregatorBase
extends Object
implements Aggregator

Aggregate that does everything except the per-group aggregation that is needed for each operation

Method Summary

void	accumulate(BindingKey key, Binding binding, FunctionEnv functionEnv)
Aggregator	copyTransform(NodeTransform transform)
abstract boolean	equals(Object other)
com.hp.hpl.jena.graph.Node	getValue(BindingKey key)
abstract com.hp.hpl.jena.graph.Node	getValueEmpty() Value if there are no elements in any group : return null for no result
abstract int	hashCode()
String	key()
abstract String	toPrefixString()
abstract String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.hp.hpl.jena.sparql.expr.aggregate.Aggregator

copy, getExpr

Method Detail

accumulate

public final void accumulate(BindingKey key,
                             Binding binding,
                             FunctionEnv functionEnv)

Specified by:

accumulate in interface Aggregator

getValueEmpty

public abstract com.hp.hpl.jena.graph.Node getValueEmpty()

Description copied from interface: Aggregator

Value if there are no elements in any group : return null for no result

Specified by:

getValueEmpty in interface Aggregator

getValue

public com.hp.hpl.jena.graph.Node getValue(BindingKey key)

Specified by:

getValue in interface Aggregator

key

public String key()

Specified by:

key in interface Aggregator

copyTransform

public final Aggregator copyTransform(NodeTransform transform)

Specified by:

copyTransform in interface Aggregator

toString

public abstract String toString()

Overrides:

toString in class Object

toPrefixString

public abstract String toPrefixString()

Specified by:

toPrefixString in interface Aggregator

hashCode

public abstract int hashCode()

Specified by:

hashCode in interface Aggregator

Overrides:

hashCode in class Object

equals

public abstract boolean equals(Object other)

Specified by:

equals in interface Aggregator

Overrides:

equals in class Object