Package org.apache.jena.sparql.algebra.op

Class OpTopN

java.lang.Object

org.apache.jena.sparql.util.PrintSerializableBase

org.apache.jena.sparql.algebra.op.OpBase

org.apache.jena.sparql.algebra.op.Op1

org.apache.jena.sparql.algebra.op.OpModifier

org.apache.jena.sparql.algebra.op.OpTopN

All Implemented Interfaces:

org.apache.jena.atlas.io.Printable, Op, Named, PrintSerializable

public class OpTopN
extends OpModifier

Top N from a stream of items - for small N, better than ORDER BY + LIMIT N

Constructor Summary

Constructors

Constructor	Description
OpTopN(Op subOp, int N, java.util.List<SortCondition> conditions)

Method Summary

Modifier and Type	Method	Description
Op	apply(Transform transform, Op subOp)
Op1	copy(Op subOp)
boolean	equalTo(Op other, NodeIsomorphismMap labelMap)
java.util.List<SortCondition>	getConditions()
int	getLimit()
java.lang.String	getName()
int	hashCode()
void	visit(OpVisitor opVisitor)

Methods inherited from class org.apache.jena.sparql.algebra.op.OpModifier

removeModifiers

Methods inherited from class org.apache.jena.sparql.algebra.op.Op1

getSubOp

Methods inherited from class org.apache.jena.sparql.algebra.op.OpBase

equals, output, output

Methods inherited from class org.apache.jena.sparql.util.PrintSerializableBase

toString, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.jena.sparql.util.PrintSerializable

toString

Constructor Detail

OpTopN

public OpTopN(Op subOp,
              int N,
              java.util.List<SortCondition> conditions)

Method Detail

getConditions

public java.util.List<SortCondition> getConditions()

getLimit

public int getLimit()

getName

public java.lang.String getName()

visit

public void visit(OpVisitor opVisitor)

copy

public Op1 copy(Op subOp)

Specified by:

copy in class Op1

apply

public Op apply(Transform transform,
                Op subOp)

Specified by:

apply in class Op1

hashCode

public int hashCode()

Specified by:

hashCode in class OpBase

equalTo

public boolean equalTo(Op other,
                       NodeIsomorphismMap labelMap)

Specified by:

equalTo in interface Op

Specified by:

equalTo in class OpBase