org.aksw.sparqlify.core.interfaces

Interface MappingOps

All Known Implementing Classes:

MappingOpsImpl

public interface MappingOps

Interface for the mapping algebra operations.

Author:

Claus Stadler

Method Summary

Methods

Modifier and Type	Method and Description
Mapping	createMapping(ViewInstance<ViewDefinition> viewInstance)
Mapping	distinct(Mapping a)
Mapping	extend(Mapping a, VarDefinition varDef)
Mapping	filter(Mapping a, com.hp.hpl.jena.sparql.expr.ExprList exprs)
Mapping	groupBy(Mapping a, com.hp.hpl.jena.sparql.core.VarExprList groupVars, List<com.hp.hpl.jena.sparql.expr.ExprAggregator> aggregators)
Mapping	join(Mapping a, Mapping b)
Mapping	leftJoin(Mapping a, Mapping b)
Mapping	order(Mapping a, List<com.hp.hpl.jena.query.SortCondition> sortConditions)
Mapping	project(Mapping a, List<com.hp.hpl.jena.sparql.core.Var> vars)
Mapping	rename(Mapping a, Map<String,String> columnRenames) Creates a new mapping with all column references in the variable definition renamed, and injects an approprate SqlProjection into the logical table
Mapping	slice(Mapping a, Long limit, Long offset)
Mapping	union(List<Mapping> members)

Method Detail

createMapping

Mapping createMapping(ViewInstance<ViewDefinition> viewInstance)

rename

Mapping rename(Mapping a,
             Map<String,String> columnRenames)

Creates a new mapping with all column references in the variable definition renamed, and injects an approprate SqlProjection into the logical table

join

Mapping join(Mapping a,
           Mapping b)

leftJoin

Mapping leftJoin(Mapping a,
               Mapping b)

union

Mapping union(List<Mapping> members)

slice

Mapping slice(Mapping a,
            Long limit,
            Long offset)

Parameters:

a -

limit - The limit. Null for no limit

offset - The offset. Null for no offset

Returns:

project

Mapping project(Mapping a,
              List<com.hp.hpl.jena.sparql.core.Var> vars)

filter

Mapping filter(Mapping a,
             com.hp.hpl.jena.sparql.expr.ExprList exprs)

distinct

Mapping distinct(Mapping a)

groupBy

Mapping groupBy(Mapping a,
              com.hp.hpl.jena.sparql.core.VarExprList groupVars,
              List<com.hp.hpl.jena.sparql.expr.ExprAggregator> aggregators)

extend

Mapping extend(Mapping a,
             VarDefinition varDef)

order

Mapping order(Mapping a,
            List<com.hp.hpl.jena.query.SortCondition> sortConditions)