eu.slipo.athenarc.triplegeo.tools

Class RdbToRdf

java.lang.Object

eu.slipo.athenarc.triplegeo.tools.RdbToRdf

public class RdbToRdf
extends java.lang.Object

Entry point of the utility for extracting RDF triples from spatially-enabled DBMSs. IMPORTANT! Include the JDBC drivers necessary for each DBMS in the classpath during execution in order to successfully connect to the database In case of MS Access personal geodatabases (.mdb format) with UTF-8 encoding, include -Dfile.encoding=UTF-8 in the Java command for execution.

Version:

2.0

Author:

Kostas Patroumpas

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static Classification	classification
private static org.opengis.referencing.crs.CRSAuthorityFactory	crsFactory
(package private) static Configuration	currentConfig
(package private) DbConnector	databaseConnector
(package private) Assistant	myAssistant
(package private) Converter	myConverter
(package private) static java.lang.String	outputFile
private org.opengis.referencing.operation.MathTransform	reproject
(package private) int	sourceSRID
(package private) int	targetSRID

Constructor Summary

Constructors

Constructor and Description
RdbToRdf(Configuration config, Classification classific, java.lang.String outFile, int sourceSRID, int targetSRID) Constructor for the transformation process from a spatially-enabled DBMS to RDF.

Method Summary

Modifier and Type	Method and Description
void	apply() Applies transformation according to the configuration settings.
private java.sql.ResultSet	collectData(DbConnector dbConn) Connects to a database and retrieves records from a table (including geometric and non-spatial attributes) according to an SQL query.

Methods inherited from class java.lang.Object

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

Field Detail

myConverter

Converter myConverter

myAssistant

Assistant myAssistant

reproject

private org.opengis.referencing.operation.MathTransform reproject

sourceSRID

int sourceSRID

targetSRID

int targetSRID

databaseConnector

DbConnector databaseConnector

currentConfig

static Configuration currentConfig

classification

static Classification classification

outputFile

static java.lang.String outputFile

crsFactory

private static final org.opengis.referencing.crs.CRSAuthorityFactory crsFactory

Constructor Detail

RdbToRdf

public RdbToRdf(Configuration config,
                Classification classific,
                java.lang.String outFile,
                int sourceSRID,
                int targetSRID)

Constructor for the transformation process from a spatially-enabled DBMS to RDF.

Parameters:

config - Parameters to configure the transformation.

classific - Instantiation of the classification scheme that assigns categories to input features.

outFile - Path to the output file that collects RDF triples.

sourceSRID - Spatial reference system (EPSG code) of the input geometries.

targetSRID - Spatial reference system (EPSG code) of geometries in the output RDF triples.

Method Detail

apply

public void apply()

Applies transformation according to the configuration settings.

collectData

private java.sql.ResultSet collectData(DbConnector dbConn)
                                throws java.lang.Exception

Connects to a database and retrieves records from a table (including geometric and non-spatial attributes) according to an SQL query.

Parameters:

dbConn - Database connector object to a DBMS.

Returns:

A resultset with all results to the SQL query.

Throws:

java.lang.Exception