eu.fbk.rdfpro.util

Class Statements

java.lang.Object

eu.fbk.rdfpro.util.Statements

public final class Statements
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static DatatypeFactory	DATATYPE_FACTORY
static Set<org.openrdf.model.URI>	TBOX_CLASSES
static Set<org.openrdf.model.URI>	TBOX_PROPERTIES
static org.openrdf.model.ValueFactory	VALUE_FACTORY
static Function<org.openrdf.model.Value,org.openrdf.model.Value>	VALUE_NORMALIZER

Method Summary

Modifier and Type	Method and Description
static Hash	computeHash(org.openrdf.model.Statement statement)
static Hash	computeHash(org.openrdf.model.Value value)
static <T> T	convert(Object object, Class<T> clazz) General conversion facility.
static <T> T	convert(Object object, Class<T> clazz, T defaultValue) General conversion facility, with fall back to default value.
static String	formatValue(org.openrdf.model.Value value)
static String	formatValue(org.openrdf.model.Value value, Namespaces namespaces)
static void	formatValue(org.openrdf.model.Value value, Namespaces namespaces, Appendable out)
static Hash	getHash(org.openrdf.model.Statement statement)
static Hash	getHash(org.openrdf.model.Value value)
static boolean	isRDFFormatLineBased(org.openrdf.rio.RDFFormat format)
static boolean	isRDFFormatTextBased(org.openrdf.rio.RDFFormat format)
static org.openrdf.model.Statement	normalize(org.openrdf.model.Statement statement)
static <T extends org.openrdf.model.Value> T	normalize(T value)
static org.openrdf.model.Value	parseValue(CharSequence sequence)
static org.openrdf.model.Value	parseValue(CharSequence sequence, Namespaces namespaces)
static org.openrdf.model.Value	shortenValue(org.openrdf.model.Value value, int threshold)
static Comparator<org.openrdf.model.Statement>	statementComparator(String components, Comparator<? super org.openrdf.model.Value> valueComparator)
static Predicate<org.openrdf.model.Statement>	statementMatcher(String spec)
static File	toRDFFile(String fileSpec)
static org.openrdf.rio.RDFFormat	toRDFFormat(String fileSpec)
static Comparator<org.openrdf.model.Value>	valueComparator(String... rankedNamespaces)

Methods inherited from class java.lang.Object

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

Field Detail

VALUE_FACTORY

public static final org.openrdf.model.ValueFactory VALUE_FACTORY

VALUE_NORMALIZER

public static final Function<org.openrdf.model.Value,org.openrdf.model.Value> VALUE_NORMALIZER

DATATYPE_FACTORY

public static final DatatypeFactory DATATYPE_FACTORY

TBOX_CLASSES

public static final Set<org.openrdf.model.URI> TBOX_CLASSES

TBOX_PROPERTIES

public static final Set<org.openrdf.model.URI> TBOX_PROPERTIES

Method Detail

valueComparator

public static Comparator<org.openrdf.model.Value> valueComparator(String... rankedNamespaces)

statementComparator

public static Comparator<org.openrdf.model.Statement> statementComparator(@Nullable
                                                                          String components,
                                                                          @Nullable
                                                                          Comparator<? super org.openrdf.model.Value> valueComparator)

statementMatcher

@Nullable
public static Predicate<org.openrdf.model.Statement> statementMatcher(@Nullable
                                                                                String spec)

normalize

public static org.openrdf.model.Statement normalize(org.openrdf.model.Statement statement)

normalize

@Nullable
public static <T extends org.openrdf.model.Value> T normalize(@Nullable
                                                                        T value)

getHash

public static Hash getHash(org.openrdf.model.Statement statement)

getHash

public static Hash getHash(@Nullable
                           org.openrdf.model.Value value)

computeHash

public static Hash computeHash(org.openrdf.model.Statement statement)

computeHash

public static Hash computeHash(@Nullable
                               org.openrdf.model.Value value)

toRDFFile

@Nullable
public static File toRDFFile(String fileSpec)

toRDFFormat

public static org.openrdf.rio.RDFFormat toRDFFormat(String fileSpec)

isRDFFormatTextBased

public static boolean isRDFFormatTextBased(org.openrdf.rio.RDFFormat format)

isRDFFormatLineBased

public static boolean isRDFFormatLineBased(org.openrdf.rio.RDFFormat format)

shortenValue

public static org.openrdf.model.Value shortenValue(org.openrdf.model.Value value,
                                                   int threshold)

formatValue

@Nullable
public static String formatValue(@Nullable
                                           org.openrdf.model.Value value)

formatValue

public static String formatValue(@Nullable
                                 org.openrdf.model.Value value,
                                 @Nullable
                                 Namespaces namespaces)

formatValue

public static void formatValue(org.openrdf.model.Value value,
                               @Nullable
                               Namespaces namespaces,
                               Appendable out)
                        throws IOException

Throws:

IOException

parseValue

@Nullable
public static org.openrdf.model.Value parseValue(@Nullable
                                                           CharSequence sequence)

parseValue

public static org.openrdf.model.Value parseValue(@Nullable
                                                 CharSequence sequence,
                                                 @Nullable
                                                 Namespaces namespaces)

convert

@Nullable
public static <T> T convert(@Nullable
                                      Object object,
                                      Class<T> clazz)
                               throws IllegalArgumentException

General conversion facility. This method attempts to convert a supplied object to an instance of the class specified. If the input is null, null is returned. If conversion is unsupported or fails, an exception is thrown. The following table lists the supported conversions:

From classes (and sub-classes)	To classes (and super-classes)
Boolean, Literal (xsd:boolean)	Boolean, Literal (xsd:boolean), String
String, Literal (plain, xsd:string)	String, Literal (plain, xsd:string), URI (as uri string), BNode (as BNode ID), Integer, Long, Double, Float, Short, Byte, BigDecimal, BigInteger, AtomicInteger, AtomicLong, Boolean, XMLGregorianCalendar, GregorianCalendar, Date (via parsing), Character (length >= 1)
Number, Literal (any numeric xsd: type)	Literal (top-level numeric xsd: type), Integer, Long, Double, Float, Short, Byte, BigDecimal, BigInteger, AtomicInteger, AtomicLong, String
Date, GregorianCalendar, XMLGregorianCalendar, Literal (xsd:dateTime, xsd:date)	Date, GregorianCalendar, XMLGregorianCalendar, Literal (xsd:dateTime), String
URI	URI, String
BNode	BNode, URI (skolemization), String
Statement	Statement, String

Type Parameters:

T - the type of result

Parameters:

object - the object to convert, possibly null

clazz - the class to convert to, not null

Returns:

the result of the conversion, or null if object was null

Throws:

IllegalArgumentException - in case conversion fails or is unsupported for the object and class specified

convert

@Nullable
public static <T> T convert(@Nullable
                                      Object object,
                                      Class<T> clazz,
                                      @Nullable
                                      T defaultValue)

General conversion facility, with fall back to default value. This method operates as convert(Object, Class), but in case the input is null or conversion is not supported returns the specified default value.

Type Parameters:

T - the type of result

Parameters:

object - the object to convert, possibly null

clazz - the class to convert to, not null

defaultValue - the default value to fall back to

Returns:

the result of the conversion, or the default value if object was null, conversion failed or is unsupported