org.aksw.rdfunit.statistics

Class DatasetStatistics

java.lang.Object

org.aksw.rdfunit.statistics.DatasetStatistics

public final class DatasetStatistics
extends Object

Generates property and class statistics for a QEF

Since:

6 /16/14 1:27 PM

Author:

Dimitris Kontokostas

Constructor Summary

Constructors

Constructor and Description
DatasetStatistics(org.aksw.jena_sparql_api.core.QueryExecutionFactory qef, boolean doGetCounts) Instantiates a new Dataset statistics.

Method Summary

Methods

Modifier and Type	Method and Description
Collection<String>	getAllNamespaces() Gets all namespaces that exists in a QEF
Map<String,Integer>	getClassStats() Returns property statistics.
Collection<SchemaSource>	getIdentifiedSchemata() Uses the getAllNamespaces() function and tries to match them to SchemaSource's
protected String	getNamespaceFromURI(String uri) Gets namespace from uRI.
Map<String,Integer>	getPropertyStats() Returns property statistics.
protected Map<String,Integer>	getStats(String sparqlQuery) Gets stats.

Methods inherited from class java.lang.Object

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

Constructor Detail

DatasetStatistics

public DatasetStatistics(org.aksw.jena_sparql_api.core.QueryExecutionFactory qef,
                 boolean doGetCounts)

Instantiates a new Dataset statistics.

Parameters:

qef - the qef

doGetCounts - the do get counts

Method Detail

getPropertyStats

public Map<String,Integer> getPropertyStats()

Returns property statistics.

Returns:

a Map, if doGetCounts is false, the number defaults to 0

getClassStats

public Map<String,Integer> getClassStats()

Returns property statistics.

Returns:

a Map, if doGetCounts is false, the number defaults to 0

getAllNamespaces

public Collection<String> getAllNamespaces()

Gets all namespaces that exists in a QEF

Returns:

returns a string Set inside a Collection

getIdentifiedSchemata

public Collection<SchemaSource> getIdentifiedSchemata()

Uses the getAllNamespaces() function and tries to match them to SchemaSource's

Returns:

a Collection of SchemaSource's for all identified namespaces

getNamespaceFromURI

protected String getNamespaceFromURI(String uri)

Gets namespace from uRI.

Parameters:

uri - the uri

Returns:

the namespace from uRI

getStats

protected Map<String,Integer> getStats(String sparqlQuery)

Gets stats.

Parameters:

sparqlQuery - the sparql query

Returns:

the stats