Package org.aksw.jena_sparql_api.schema

Class NodeSchemaDataFetcher

java.lang.Object

org.aksw.jena_sparql_api.schema.NodeSchemaDataFetcher

public class NodeSchemaDataFetcher
extends Object

A class to retrieve the triples that correspond to a set of RDF resources w.r.t. given schemas.

Author:

raven

Constructor Summary

Constructors

Constructor	Description
NodeSchemaDataFetcher()

Method Summary

Modifier and Type	Method	Description
static org.apache.jena.query.Query	immediateSchemaToSparql(NodeSchema schema)
static void	main(String[] args)
static void	printShapedNode(ShapedNode sn)
com.google.common.collect.Multimap<NodeSchema,org.apache.jena.graph.Node>	step(com.google.common.collect.Multimap<NodeSchema,org.apache.jena.graph.Node> schemaAndNodes, QueryExecutionFactoryQuery conn, com.google.common.collect.Multimap<NodeSchema,org.apache.jena.graph.Node> done, org.aksw.commons.rx.lookup.LookupService<org.apache.jena.graph.Node,ResourceMetamodel> metaDataService, ResourceCache resourceCache)
void	sync(com.google.common.collect.Multimap<NodeSchema,org.apache.jena.graph.Node> schemaAndNodes, QueryExecutionFactoryQuery conn, org.aksw.commons.rx.lookup.LookupService<org.apache.jena.graph.Node,ResourceMetamodel> metaDataService, ResourceCache graphToResourceState)
static org.apache.jena.query.Query	toQuery(com.google.common.collect.Multimap<NodeSchema,org.apache.jena.graph.Node> schemaAndNodes)	Build the query that retrieves the information that matches the schemas for the given nodes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

NodeSchemaDataFetcher

public NodeSchemaDataFetcher()

Method Details

toQuery

public static org.apache.jena.query.Query toQuery(com.google.common.collect.Multimap<NodeSchema,org.apache.jena.graph.Node> schemaAndNodes)

Build the query that retrieves the information that matches the schemas for the given nodes. This method does not perform any optimizations: If the same node occurs under multiple schemas with overlapping properties then needless amounts of data are accessed. In principle a preprocessing step could be applied that optimizes the 'schemaAndNodes' argument. TODO Whenever we provide such a preprocessing implementation link to it from here

Parameters:

schemaAndNodes -

Returns:

sync

public void sync(com.google.common.collect.Multimap<NodeSchema,org.apache.jena.graph.Node> schemaAndNodes,
 QueryExecutionFactoryQuery conn,
 org.aksw.commons.rx.lookup.LookupService<org.apache.jena.graph.Node,ResourceMetamodel> metaDataService,
 ResourceCache graphToResourceState)

step

public com.google.common.collect.Multimap<NodeSchema,org.apache.jena.graph.Node> step(com.google.common.collect.Multimap<NodeSchema,org.apache.jena.graph.Node> schemaAndNodes,
 QueryExecutionFactoryQuery conn,
 com.google.common.collect.Multimap<NodeSchema,org.apache.jena.graph.Node> done,
 org.aksw.commons.rx.lookup.LookupService<org.apache.jena.graph.Node,ResourceMetamodel> metaDataService,
 ResourceCache resourceCache)

immediateSchemaToSparql

public static org.apache.jena.query.Query immediateSchemaToSparql(NodeSchema schema)

main

public static void main(String[] args)

printShapedNode

public static void printShapedNode(ShapedNode sn)