org.dllearner.kb.sparql
Class ExtractionDBCache

java.lang.Object
  org.dllearner.kb.sparql.ExtractionDBCache

public class ExtractionDBCache
extends Object

The class is used to cache information about resources to a database. Provides the connection to an H2 database in a light weight, configuration free manner. Note: Currently, either select ot construct has to be used (not both).

Author:

Jens Lehmann

Constructor Summary

ExtractionDBCache(String cacheDir)

Method Summary

void	closeConnection()
com.hp.hpl.jena.rdf.model.Model	executeConstructQuery(SparqlEndpoint endpoint, String query)
com.hp.hpl.jena.rdf.model.Model	executeConstructQuery(SparqlEndpoint endpoint, String query, int maxExecutionTimeInSeconds)
String	executeSelectQuery(SparqlEndpoint endpoint, String query)
String	executeSelectQuery(SparqlEndpoint endpoint, String query, int maxExecutionTimeInSeconds)
static void	main(String[] args)
void	setMaxExecutionTimeInSeconds(int maxExecutionTimeInSeconds)
static String	toNTriple(com.hp.hpl.jena.rdf.model.Model m)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtractionDBCache

public ExtractionDBCache(String cacheDir)

Method Detail

executeConstructQuery

public com.hp.hpl.jena.rdf.model.Model executeConstructQuery(SparqlEndpoint endpoint,
                                                             String query)
                                                      throws SQLException,
                                                             UnsupportedEncodingException

Throws:

SQLException

UnsupportedEncodingException

executeConstructQuery

public com.hp.hpl.jena.rdf.model.Model executeConstructQuery(SparqlEndpoint endpoint,
                                                             String query,
                                                             int maxExecutionTimeInSeconds)
                                                      throws SQLException,
                                                             UnsupportedEncodingException

Throws:

SQLException

UnsupportedEncodingException

executeSelectQuery

public String executeSelectQuery(SparqlEndpoint endpoint,
                                 String query)

executeSelectQuery

public String executeSelectQuery(SparqlEndpoint endpoint,
                                 String query,
                                 int maxExecutionTimeInSeconds)

closeConnection

public void closeConnection()
                     throws SQLException

Throws:

SQLException

toNTriple

public static String toNTriple(com.hp.hpl.jena.rdf.model.Model m)

setMaxExecutionTimeInSeconds

public void setMaxExecutionTimeInSeconds(int maxExecutionTimeInSeconds)

main

public static void main(String[] args)
                 throws ClassNotFoundException,
                        SQLException,
                        NoSuchAlgorithmException,
                        UnsupportedEncodingException

Throws:

ClassNotFoundException

SQLException

NoSuchAlgorithmException

UnsupportedEncodingException