eu.larkc.shared
Class SimpleSparqlClient

java.lang.Object
  eu.larkc.shared.SimpleSparqlClient

public class SimpleSparqlClient
extends java.lang.Object

A very simple SPARQL client which is capable of asking queries to the LarKC platform. This code is taken mostly from the SPARQLClient GUI from the development kit.

Author:

Christoph Fuchs, Norbert Lanzanasto

Field Summary

static java.lang.String

serverLocalhost Default address of the LarKC SPARQL server.

Constructor Summary

SimpleSparqlClient()
Constructor.

SimpleSparqlClient(java.lang.String serverAddress)
Constructor.

Method Summary

java.lang.String

sendQuery(java.lang.String query) Sends a SPARQL query to the LarKC SPARQL server specified in the constructor.

Methods inherited from class java.lang.Object

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

Field Detail

serverLocalhost

public static final java.lang.String serverLocalhost

Default address of the LarKC SPARQL server.

See Also:

Constant Field Values

Constructor Detail

SimpleSparqlClient

public SimpleSparqlClient()
                   throws java.net.MalformedURLException

Constructor. Uses default address of the LarKC SPARQL server (localhost:8000).

Throws:

java.net.MalformedURLException

SimpleSparqlClient

public SimpleSparqlClient(java.lang.String serverAddress)
                   throws java.net.MalformedURLException

Constructor.

Parameters:

serverAddress - the address of the LarKC SPARQL server (e.g. http://localhost:8000). A trailing forward slash ("/") will be added if missing. The path to the SPARQL endpoint will be added as well ("sparql/").

Throws:

java.net.MalformedURLException - if the URL is malformed

Method Detail

sendQuery

public java.lang.String sendQuery(java.lang.String query)
                           throws java.io.IOException

Sends a SPARQL query to the LarKC SPARQL server specified in the constructor.

Parameters:

query - the SPARQL query to send

Returns:

server response as a String

Throws:

java.io.IOException - if the server is unreachable