eu.slipo.athenarc.triplegeo.utils

Class ReverseConfiguration

java.lang.Object

eu.slipo.athenarc.triplegeo.utils.ReverseConfiguration

public final class ReverseConfiguration
extends java.lang.Object

Parser of user-specified configuration files for reconstructing records from an RDF graph (Reverse Transformation).

Version:

2.0

Author:

Kostas Patroumpas

Field Summary

Fields

Modifier and Type	Field and Description
int	batch_size Default number of entities (i.e., records) to process in each batch of the reverse transformation before writing them to file.
java.lang.String	defaultLang Default language specification tag for string literals.
char	delimiter Delimiter character for attribute values in the output CSV file.
java.lang.String	encoding Encoding used for strings.
java.lang.String	inputFiles Path to file(s) containing input RDF dataset(s).
(package private) Assistant	myAssistant
java.lang.String	outputFile Path to the output file that will contain all resulting records.
java.lang.String	outputFormat Format of output data file.
private java.lang.String	path Path to a properties file containing all parameters used in the reverse transformation.
char	quote Quote character to be used for strings in the output CSV file.
java.lang.String	serialization Input RDF serialization.
java.lang.String	sourceCRS Spatial reference system (EPSG code) of geometries in the input RDF triples.
java.lang.String	sparqlFile Path to a user-specified SELECT query in SPARQL that will retrieve results from the RDF graph(s).
java.lang.String	targetCRS Spatial reference system (EPSG code) of the output dataset.
java.lang.String	tmpDir Path to a directory where intermediate files may be temporarily written during reverse transformation.

Constructor Summary

Constructors

Constructor and Description
ReverseConfiguration(java.lang.String path) Constructor of a ReverseConfiguration object.

Method Summary

Modifier and Type	Method and Description
private void	buildConfiguration() Loads the reverse configuration from a properties file.
private void	initializeParameters(java.util.Properties properties) Initializes all the parameters for the reverse transformation.

Methods inherited from class java.lang.Object

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

Field Detail

myAssistant

Assistant myAssistant

outputFormat

public java.lang.String outputFormat

Format of output data file. Supported formats: SHAPEFILE, CSV.

path

private java.lang.String path

Path to a properties file containing all parameters used in the reverse transformation.

inputFiles

public java.lang.String inputFiles

Path to file(s) containing input RDF dataset(s). Multiple input files (of exactly the same serialization and ontology) can be specified, separating them by ';' in order to activate multiple concurrent threads for their reverse transformation.

outputFile

public java.lang.String outputFile

Path to the output file that will contain all resulting records.

sparqlFile

public java.lang.String sparqlFile

Path to a user-specified SELECT query in SPARQL that will retrieve results from the RDF graph(s). This query should conform with the underlying ontology of the input RDF triples.

tmpDir

public java.lang.String tmpDir

Path to a directory where intermediate files may be temporarily written during reverse transformation.

serialization

public java.lang.String serialization

Input RDF serialization. Supported formats: RDF/XML (default), RDF/XML-ABBREV, N-TRIPLES, TURTLE (or TTL), N3.

defaultLang

public java.lang.String defaultLang

Default language specification tag for string literals.

delimiter

public char delimiter

Delimiter character for attribute values in the output CSV file. Mandatory for CSV output; ignored otherwise.

quote

public char quote

Quote character to be used for strings in the output CSV file. Mandatory for CSV output; ignored otherwise.

encoding

public java.lang.String encoding

Encoding used for strings. Default encoding: UTF-8.

sourceCRS

public java.lang.String sourceCRS

Spatial reference system (EPSG code) of geometries in the input RDF triples. If omitted, geometries are assumed in WGS84 reference system (EPSG:4326). Example: EPSG:4326

targetCRS

public java.lang.String targetCRS

Spatial reference system (EPSG code) of the output dataset. If omitted, the georeference of the RDF geometries will be retained (i.e., no reprojection of coordinates will take place). Example: EPSG:4326

batch_size

public int batch_size

Default number of entities (i.e., records) to process in each batch of the reverse transformation before writing them to file.

Constructor Detail

ReverseConfiguration

public ReverseConfiguration(java.lang.String path)

Constructor of a ReverseConfiguration object.

Parameters:

path - Path to a properties file containing all parameters to be used in the transformation.

Method Detail

buildConfiguration

private void buildConfiguration()

Loads the reverse configuration from a properties file.

initializeParameters

private void initializeParameters(java.util.Properties properties)

Initializes all the parameters for the reverse transformation.

Parameters:

properties - All properties as specified in the configuration file.