Package be.ugent.rml

Class Utils

java.lang.Object

be.ugent.rml.Utils

public class Utils
extends Object

General static utility functions

Constructor Summary

Constructors

Constructor	Description
Utils()

Method Summary

Modifier and Type	Method	Description
static String	encodeURI(String url)
static String	fileToString(File file)
static String	getBaseDirectiveTurtle(File file)
static String	getBaseDirectiveTurtle(InputStream is)
static String	getBaseDirectiveTurtle(String turtle)
static File	getFile(String path)
static File	getFile(String path, File basePath)
static int	getFreePortNumber()
static int	getHash(String query)
static int	getHashOfString(String str)
static InputStream	getInputStreamFromFile(File file)
static InputStream	getInputStreamFromFileOrContentString(String s)	Get an InputStream from a string.
static InputStream	getInputStreamFromLocation(String location)
static InputStream	getInputStreamFromLocation(String location, File basePath, String contentType)
static InputStream	getInputStreamFromURL(URL url)
static InputStream	getInputStreamFromURL(URL url, String contentType)
static List<Term>	getList(QuadStore store, Term first)
static List<Term>	getList(QuadStore store, Term first, List<Term> list)
static List<String>	getLiteralObjectsFromQuads(List<Quad> quads)
static List<Term>	getObjectsFromQuads(List<Quad> quads)
static Reader	getReaderFromFile(File file)
static Reader	getReaderFromLocation(String location)
static Reader	getReaderFromLocation(String location, File basePath, String contentType)
static Reader	getReaderFromURL(URL url)
static Reader	getReaderFromURL(URL url, String contentType)
static List<Term>	getSubjectsFromQuads(List<Quad> quads)
static String	getURLParamsString(Map<String,String> params)
static String	hashCode(String s)
static boolean	isRelativeIRI(String iri)	This method returns true if a string is a relative IRI.
static boolean	isRemoteFile(String location)
static boolean	isValidIRI(String iri)	This method returns true if a string is valid IRI.
static boolean	isValidrrLanguage(String s)	Check if conforming to https://tools.ietf.org/html/bcp47#section-2.2.9
static void	ntriples2hdt(String rdfInputPath, String hdtOutputPath)
static List<Extractor>	parseTemplate(String template, boolean ignoreDoubleQuotes)	This method parse the generic template and returns a list of Extractors that can later be used by the executor to get the data values from the records.
static String	randomString(int len)
static String	readFile(String path, Charset encoding)
static int	selectedColumnHash(String query)
static String	transformDatatypeString(String input, String datatype)

Methods inherited from class java.lang.Object

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

Constructor Detail

Utils

public Utils()

Method Detail

getReaderFromLocation

public static Reader getReaderFromLocation(String location)
                                    throws IOException

Throws:

IOException

getReaderFromLocation

public static Reader getReaderFromLocation(String location,
                                           File basePath,
                                           String contentType)
                                    throws IOException

Throws:

IOException

getInputStreamFromLocation

public static InputStream getInputStreamFromLocation(String location)
                                              throws IOException

Throws:

IOException

getInputStreamFromLocation

public static InputStream getInputStreamFromLocation(String location,
                                                     File basePath,
                                                     String contentType)
                                              throws IOException

Throws:

IOException

getInputStreamFromFileOrContentString

public static InputStream getInputStreamFromFileOrContentString(String s)

Get an InputStream from a string. This string is either a path (local or remote) to an RDF file, or a raw RDF text.

Parameters:

s - input, either RDF file path or raw RDF text

Returns:

input stream

getFile

public static File getFile(String path)
                    throws IOException

Throws:

IOException

getFile

public static File getFile(String path,
                           File basePath)
                    throws IOException

Throws:

IOException

getReaderFromURL

public static Reader getReaderFromURL(URL url)
                               throws IOException

Throws:

IOException

getReaderFromURL

public static Reader getReaderFromURL(URL url,
                                      String contentType)
                               throws IOException

Throws:

IOException

getReaderFromFile

public static Reader getReaderFromFile(File file)
                                throws FileNotFoundException

Throws:

FileNotFoundException

getInputStreamFromURL

public static InputStream getInputStreamFromURL(URL url)
                                         throws IOException

Throws:

IOException

getInputStreamFromURL

public static InputStream getInputStreamFromURL(URL url,
                                                String contentType)

getInputStreamFromFile

public static InputStream getInputStreamFromFile(File file)
                                          throws FileNotFoundException

Throws:

FileNotFoundException

isRemoteFile

public static boolean isRemoteFile(String location)

getSubjectsFromQuads

public static List<Term> getSubjectsFromQuads(List<Quad> quads)

getObjectsFromQuads

public static List<Term> getObjectsFromQuads(List<Quad> quads)

getLiteralObjectsFromQuads

public static List<String> getLiteralObjectsFromQuads(List<Quad> quads)

getList

public static List<Term> getList(QuadStore store,
                                 Term first)

getList

public static List<Term> getList(QuadStore store,
                                 Term first,
                                 List<Term> list)

isValidrrLanguage

public static boolean isValidrrLanguage(String s)

Check if conforming to https://tools.ietf.org/html/bcp47#section-2.2.9

Parameters:

s - language tag

Returns:

True if valid language tag according to BCP 47

encodeURI

public static String encodeURI(String url)

fileToString

public static String fileToString(File file)
                           throws IOException

Throws:

IOException

selectedColumnHash

public static int selectedColumnHash(String query)

getHash

public static int getHash(String query)

readFile

public static String readFile(String path,
                              Charset encoding)
                       throws IOException

Throws:

IOException

getURLParamsString

public static String getURLParamsString(Map<String,String> params)
                                 throws UnsupportedEncodingException

Throws:

UnsupportedEncodingException

getFreePortNumber

public static int getFreePortNumber()
                             throws IOException

Throws:

IOException

parseTemplate

public static List<Extractor> parseTemplate(String template,
                                            boolean ignoreDoubleQuotes)

This method parse the generic template and returns a list of Extractors that can later be used by the executor to get the data values from the records.

Parameters:

template - template string

Returns:

list of extractors

randomString

public static String randomString(int len)

hashCode

public static String hashCode(String s)

ntriples2hdt

public static void ntriples2hdt(String rdfInputPath,
                                String hdtOutputPath)

isValidIRI

public static boolean isValidIRI(String iri)

This method returns true if a string is valid IRI.

Parameters:

iri - the IRI to validate.

Returns:

true if the IRI is valid, else false.

isRelativeIRI

public static boolean isRelativeIRI(String iri)

This method returns true if a string is a relative IRI.

Parameters:

iri - the IRI to check.

Returns:

true if the IRI is relative, else false.

getBaseDirectiveTurtle

public static String getBaseDirectiveTurtle(File file)

getBaseDirectiveTurtle

public static String getBaseDirectiveTurtle(InputStream is)

getBaseDirectiveTurtle

public static String getBaseDirectiveTurtle(String turtle)

transformDatatypeString

public static String transformDatatypeString(String input,
                                             String datatype)

getHashOfString

public static int getHashOfString(String str)