eu.slipo.athenarc.triplegeo.tools

Class GpxToRdf

java.lang.Object

eu.slipo.athenarc.triplegeo.tools.GpxToRdf

public class GpxToRdf
extends java.lang.Object

Main entry point of the utility for extracting RDF triples from GPX files. LIMITATIONS: Currently supporting WAYPOINT and TRACK features only! GPX manual available at: http://www.topografix.com/gpx_manual.asp

Version:

2.0

Author:

Kostas Patroumpas

Field Summary

Fields

Modifier and Type	Field and Description
private Classification	classification
private Configuration	currentConfig
private java.lang.String	inputFile
(package private) Assistant	myAssistant
(package private) Converter	myConverter
private java.lang.String	outputFile
(package private) int	sourceSRID
(package private) int	targetSRID

Constructor Summary

Constructors

Constructor and Description
GpxToRdf(Configuration config, Classification classific, java.lang.String inFile, java.lang.String outFile, int sourceSRID, int targetSRID) Constructor for the transformation process from GPX file to RDF.

Method Summary

Modifier and Type	Method and Description
private void	addExtensionValues(java.util.Map<java.lang.String,java.lang.String> row, java.util.List<java.lang.Object> ext) Updates a dictionary with the values specified in custom GPX extensions (the name of the custom attribute is used as the key for the respective value)
private void	addTagValue(java.util.Map<java.lang.String,java.lang.String> row, java.lang.String tag, java.lang.Object val) Updates a dictionary with the given value for an attribute (its original name is used as tag)
void	apply() Applies transformation according to the configuration settings.
private static GpxType	collectData(java.lang.String filePath) Loads the GPX file from the configuration path and returns the GPX features (waypoints, tracks) identified according to the GPX schema.
private void	parseDocument(GpxType gpx) Parse each item (waypoint, track) from GPX document in order to create the necessary triples on disk (including geometric and non-spatial attributes).

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

sourceSRID

int sourceSRID

targetSRID

int targetSRID

currentConfig

private Configuration currentConfig

classification

private Classification classification

inputFile

private java.lang.String inputFile

outputFile

private java.lang.String outputFile

Constructor Detail

GpxToRdf

public GpxToRdf(Configuration config,
                Classification classific,
                java.lang.String inFile,
                java.lang.String outFile,
                int sourceSRID,
                int targetSRID)
         throws java.lang.ClassNotFoundException

Constructor for the transformation process from GPX file to RDF.

Parameters:

config - Parameters to configure the transformation.

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

inFile - Path to input GPX file.

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

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

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

Throws:

java.lang.ClassNotFoundException

Method Detail

apply

public void apply()

Applies transformation according to the configuration settings.

collectData

private static GpxType collectData(java.lang.String filePath)
                            throws java.io.IOException

Loads the GPX file from the configuration path and returns the GPX features (waypoints, tracks) identified according to the GPX schema.

Parameters:

filePath - The path to the GPX file.

Returns:

Instantiation of a GPX document containing all identified waypoints and tracks.

Throws:

java.io.IOException

parseDocument

private void parseDocument(GpxType gpx)

Parse each item (waypoint, track) from GPX document in order to create the necessary triples on disk (including geometric and non-spatial attributes).

Parameters:

gpx - The GPX document with waypoints and tracks.

addTagValue

private void addTagValue(java.util.Map<java.lang.String,java.lang.String> row,
                         java.lang.String tag,
                         java.lang.Object val)

Updates a dictionary with the given value for an attribute (its original name is used as tag)

Parameters:

row - Dictionary with (tag, value) pairs

tag - Key to be found/added in the dictionary

val - Value to be updated/added into the dictionary

addExtensionValues

private void addExtensionValues(java.util.Map<java.lang.String,java.lang.String> row,
                                java.util.List<java.lang.Object> ext)

Updates a dictionary with the values specified in custom GPX extensions (the name of the custom attribute is used as the key for the respective value)

Parameters:

row - Dictionary with (tag, value) pairs

ext - The list of extensions specified for a GPX waypoint or track