eu.slipo.athenarc.triplegeo.tools

Class CsvToRdf

java.lang.Object

eu.slipo.athenarc.triplegeo.tools.CsvToRdf

public class CsvToRdf
extends java.lang.Object

Main entry point of the utility for extracting RDF triples from CSV file. Instead of just lon/lat attributes for points, this utility also supports more complex geometry types, provided that input CSV includes an attribute with the WKT representation of such geometries. LIMITATIONS: Currently, only supporting CSV files with header (i.e., named attributes). Apart from a delimiter, configuration files for CSV records must also specify whether there is a quote character in string values.

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
private java.lang.String[]	csvHeader
private Configuration	currentConfig
private java.lang.String	encoding
private java.lang.String	inputFile
(package private) Assistant	myAssistant
(package private) Converter	myConverter
private 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
CsvToRdf(Configuration config, Classification classific, java.lang.String inFile, java.lang.String outFile, int sourceSRID, int targetSRID) Constructor for the transformation process from CSV file to RDF.

Method Summary

Modifier and Type	Method and Description
void	apply() Applies transformation according to the configuration settings.
private java.util.Iterator<org.apache.commons.csv.CSVRecord>	collectData(java.lang.String filePath) Loads the CSV file from the configuration path and returns an iterable feature collection.

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

currentConfig

private Configuration currentConfig

classification

private Classification classification

inputFile

private java.lang.String inputFile

outputFile

private java.lang.String outputFile

encoding

private java.lang.String encoding

crsFactory

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

csvHeader

private java.lang.String[] csvHeader

Constructor Detail

CsvToRdf

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

Constructor for the transformation process from CSV 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 CSV 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.

Method Detail

collectData

private java.util.Iterator<org.apache.commons.csv.CSVRecord> collectData(java.lang.String filePath)

Loads the CSV file from the configuration path and returns an iterable feature collection.

Parameters:

filePath - The path to the CSV file containing data features.

Returns:

Iterator over the collection of CSV records that can be streamed into the transformation process.

apply

public void apply()

Applies transformation according to the configuration settings.