eu.slipo.athenarc.triplegeo.tools

Class GeoJsonToRdf

java.lang.Object

eu.slipo.athenarc.triplegeo.tools.GeoJsonToRdf

public class GeoJsonToRdf
extends java.lang.Object

Entry point to convert GeoJSON files into RDF triples. LIMITATIONS: - Nested properties (non-spatial) in GeoJSON are considered as carrying NULL values by GeoTools. - Each feature must have the same properties, i.e., all features must comply with the same attribute schema.

Version:

2.0

Author:

Kostas Patroumpas

Field Summary

Fields

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
void	apply() Applies transformation according to the configuration settings.
private org.geotools.feature.FeatureIterator<?>	collectData(java.lang.String jsonPath) Opens the GeoJSON file specified in the configuration and returns a feature iterator.

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

org.opengis.referencing.operation.MathTransform reproject

sourceSRID

int sourceSRID

targetSRID

int targetSRID

currentConfig

Configuration currentConfig

classification

private Classification classification

inputFile

java.lang.String inputFile

outputFile

java.lang.String outputFile

crsFactory

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

Constructor Detail

GeoJsonToRdf

public GeoJsonToRdf(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 GeoJSON 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 GeoJSON file.

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.

Throws:

java.lang.ClassNotFoundException

Method Detail

apply

public void apply()

Applies transformation according to the configuration settings.

collectData

private org.geotools.feature.FeatureIterator<?> collectData(java.lang.String jsonPath)

Opens the GeoJSON file specified in the configuration and returns a feature iterator.

Parameters:

jsonPath - The path to the GeoJSON file.

Returns:

FeatureIterator over the collection of features that can be streamed into the transformation process.