org.rdfhdt.hdt.util

Class RDFInfo

java.lang.Object

org.rdfhdt.hdt.util.RDFInfo

public class RDFInfo
extends Object

A class for getting basic information about a file

Author:

Eugen

Field Summary

Fields

Modifier and Type	Field and Description
static String	compression_prop
static String	size_prop
static String	triples_prop

Method Summary

Modifier and Type	Method and Description
static long	countLines(String filename, RDFParserCallback parser, RDFNotation notation) Finds the length of file in bytes and counts the number of lines and fills the given specs with them using "fillHDTSpecification(long, int, HDTOptions)" method.
static void	fillHDTSpecifications(long sizeInBytes, long numLines, HDTOptions specs) Fills the given HDTSpecification object with the given information about the (RDF) file.
static float	getCompression(HDTOptions specs) Gets the "rdf.expectedCompression" property is it is set.
static Long	getSizeInBytes(HDTOptions specs) Gets the "rdf.sizeInBytes" property and returns it if set, otherwise returns null.
static long	getTriples(HDTOptions specs) Gets the "rdf.triples" property and returns it if set, otherwise returns null.
static void	setCompression(float compression, HDTOptions specs) Sets the "rdf.expectedCompression" property, overwrites if existing
static void	setSizeInBytes(long sizeInBytes, HDTOptions specs) Sets the "rdf.sizeInBytes" property, overwrites if existing
static void	setTriples(long numLines, HDTOptions specs) Sets the "rdf.triples" property, overwrites if existing
static boolean	triplesSet(HDTOptions specs) Checks if "rdf.triples" property was set by the user

Methods inherited from class java.lang.Object

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

Field Detail

size_prop

public static final String size_prop

See Also:

Constant Field Values

triples_prop

public static final String triples_prop

See Also:

Constant Field Values

compression_prop

public static final String compression_prop

See Also:

Constant Field Values

Method Detail

fillHDTSpecifications

public static void fillHDTSpecifications(long sizeInBytes,
                                         long numLines,
                                         HDTOptions specs)

Fills the given HDTSpecification object with the given information about the (RDF) file. It sets these options: rdf.sizeInBytes, rdf.triples WILL overwrite if options already set in specs.

Parameters:

specs - HDTSpecification object to be filled

setSizeInBytes

public static void setSizeInBytes(long sizeInBytes,
                                  HDTOptions specs)

Sets the "rdf.sizeInBytes" property, overwrites if existing

setTriples

public static void setTriples(long numLines,
                              HDTOptions specs)

Sets the "rdf.triples" property, overwrites if existing

setCompression

public static void setCompression(float compression,
                                  HDTOptions specs)

Sets the "rdf.expectedCompression" property, overwrites if existing

getSizeInBytes

public static Long getSizeInBytes(HDTOptions specs)

Gets the "rdf.sizeInBytes" property and returns it if set, otherwise returns null.

getTriples

public static long getTriples(HDTOptions specs)

Gets the "rdf.triples" property and returns it if set, otherwise returns null.

triplesSet

public static boolean triplesSet(HDTOptions specs)

Checks if "rdf.triples" property was set by the user

getCompression

public static float getCompression(HDTOptions specs)

Gets the "rdf.expectedCompression" property is it is set. If not sets it to 0.15 and returns that value.

countLines

public static long countLines(String filename,
                              RDFParserCallback parser,
                              RDFNotation notation)
                       throws FileNotFoundException,
                              IOException,
                              ParserException

Finds the length of file in bytes and counts the number of lines and fills the given specs with them using "fillHDTSpecification(long, int, HDTOptions)" method.

Throws:

FileNotFoundException

IOException

ParserException