com.bigdata.rdf.internal.impl.extensions

Class DateTimeExtension<V extends BigdataValue>

java.lang.Object

com.bigdata.rdf.internal.impl.extensions.DateTimeExtension<V>

All Implemented Interfaces:

IExtension<V>

public class DateTimeExtension<V extends BigdataValue>
extends Object
implements IExtension<V>

This implementation of IExtension implements inlining for literals that represent xsd:dateTime literals. These literals will be stored as time in milliseconds since the epoch. The milliseconds are encoded as an inline long.

Field Summary

Fields

Modifier and Type	Field and Description
static DatatypeFactory	datatypeFactorySingleton Singleton.

Constructor Summary

Constructors

Constructor and Description
DateTimeExtension(IDatatypeURIResolver resolver, TimeZone defaultTZ)

Method Summary

Methods

Modifier and Type	Method and Description
V	asValue(LiteralExtensionIV iv, BigdataValueFactory vf) Use the long value of the XSDLongIV delegate (which represents milliseconds since the epoch) to create a an XMLGregorianCalendar object (GMT timezone).
LiteralExtensionIV	createIV(long timestamp, org.openrdf.model.URI dt)
LiteralExtensionIV	createIV(org.openrdf.model.Value value) Attempts to convert the supplied value into an epoch representation.
Set<BigdataURI>	getDatatypes() Return the fully resolved datatype(s) handled by this interface in the form of a BigdataURI with the TermId already set.
static long	getTimestamp(String dateTime) Convert an xsd:dateTime into its milliseconds from the epoch representation.
static long	getTimestamp(String dateTime, TimeZone defaultTZ) Convert an xsd:dateTime into its milliseconds from the epoch representation.

Methods inherited from class java.lang.Object

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

Field Detail

datatypeFactorySingleton

public static final DatatypeFactory datatypeFactorySingleton

Singleton.

Constructor Detail

DateTimeExtension

public DateTimeExtension(IDatatypeURIResolver resolver,
                 TimeZone defaultTZ)

Method Detail

getDatatypes

public Set<BigdataURI> getDatatypes()

Description copied from interface: IExtension

Return the fully resolved datatype(s) handled by this interface in the form of a BigdataURI with the TermId already set.

Specified by:

getDatatypes in interface IExtension<V extends BigdataValue>

Returns:

the datatype

createIV

public LiteralExtensionIV createIV(org.openrdf.model.Value value)

Attempts to convert the supplied value into an epoch representation. Tests for a literal value with the correct datatype that can be converted to a positive long integer. Encodes the long in a delegate XSDLongIV, and returns an LiteralExtensionIV to wrap the native type.

Specified by:

createIV in interface IExtension<V extends BigdataValue>

Parameters:

value - The RDF Value

Returns:

The extension IV -or- null if the Value can not be inlined using this IExtension.

getTimestamp

public static long getTimestamp(String dateTime,
                TimeZone defaultTZ)

Convert an xsd:dateTime into its milliseconds from the epoch representation.

getTimestamp

public static long getTimestamp(String dateTime)

Convert an xsd:dateTime into its milliseconds from the epoch representation.

createIV

public LiteralExtensionIV createIV(long timestamp,
                          org.openrdf.model.URI dt)

asValue

public V asValue(LiteralExtensionIV iv,
        BigdataValueFactory vf)

Use the long value of the XSDLongIV delegate (which represents milliseconds since the epoch) to create a an XMLGregorianCalendar object (GMT timezone). Use the XMLGregorianCalendar to create a datatype literal value with the appropriate datatype.

Specified by:

asValue in interface IExtension<V extends BigdataValue>

Parameters:

iv - The extension IV

vf - The bigdata value factory

Returns:

The RDF Value