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

Class AggCustom

java.lang.Object

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

com.hp.hpl.jena.sparql.expr.aggregate.AggCustom

All Implemented Interfaces:

Aggregator

public class AggCustom
extends AggregatorBase

Syntax element and framework execution for custom aggregates.

Constructor Summary

Constructors

Constructor and Description
AggCustom(String iri, ExprList exprs)

Method Summary

Methods

Modifier and Type	Method and Description
String	asSparqlExpr(SerializationContext sCxt) Format as an (extended) SPARQL expression
Aggregator	copy(ExprList exprs)
static Accumulator	createAccNull()
Accumulator	createAccumulator() Create an accumulator for this aggregator
boolean	equals(Object other)
Expr	getExpr() Many aggergate use a single expression.
String	getIRI()
Node	getValueEmpty() Value if there are no elements in any group : return null for no result
int	hashCode()
String	toPrefixString()

Methods inherited from class com.hp.hpl.jena.sparql.expr.aggregate.AggregatorBase

copyTransform, getExprList, getName, getValue, key, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

AggCustom

public AggCustom(String iri,
         ExprList exprs)

Method Detail

copy

public Aggregator copy(ExprList exprs)

asSparqlExpr

public String asSparqlExpr(SerializationContext sCxt)

Description copied from interface: Aggregator

Format as an (extended) SPARQL expression

Specified by:

asSparqlExpr in interface Aggregator

Overrides:

asSparqlExpr in class AggregatorBase

toPrefixString

public String toPrefixString()

Specified by:

toPrefixString in interface Aggregator

Overrides:

toPrefixString in class AggregatorBase

createAccumulator

public Accumulator createAccumulator()

Description copied from interface: Aggregator

Create an accumulator for this aggregator

Specified by:

createAccumulator in interface Aggregator

Specified by:

createAccumulator in class AggregatorBase

getValueEmpty

public 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

Specified by:

getValueEmpty in class AggregatorBase

getExpr

public Expr getExpr()

Description copied from class: AggregatorBase

Many aggergate use a single expression. This convebnience operation gets the expression if there is exactly one.

getIRI

public String getIRI()

hashCode

public int hashCode()

Specified by:

hashCode in interface Aggregator

Specified by:

hashCode in class AggregatorBase

equals

public boolean equals(Object other)

Specified by:

equals in interface Aggregator

Specified by:

equals in class AggregatorBase

createAccNull

public static Accumulator createAccNull()