com.hp.hpl.jena.datatypes
Class TypeMapper

java.lang.Object
  com.hp.hpl.jena.datatypes.TypeMapper

public class TypeMapper
extends Object

The TypeMapper provides a global registry of known datatypes. The datatypes can be retrieved by their URI or from the java class that is used to represent them.

Version:

$Revision: 1.2 $ on $Date: 2009-08-21 15:42:01 $

Author:

Dave Reynolds

Constructor Summary

TypeMapper()

Method Summary

static TypeMapper	getInstance() Return the single global instance of the TypeMapper.
RDFDatatype	getSafeTypeByName(String uri) Version of getTypeByName which will treat unknown URIs as typed literals but with just the default implementation
RDFDatatype	getTypeByClass(Class<?> clazz) Look up a datatype suitable for representing instances of the given Java class.
RDFDatatype	getTypeByName(String uri) Lookup a known datatype.
RDFDatatype	getTypeByValue(Object value) Method getTypeByValue.
Iterator<RDFDatatype>	listTypes() List all the known datatypes
static void	main(String[] args)
void	registerDatatype(RDFDatatype type) Register a new datatype

Methods inherited from class java.lang.Object

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

Constructor Detail

TypeMapper

public TypeMapper()

Method Detail

getInstance

public static TypeMapper getInstance()

Return the single global instance of the TypeMapper. Done this way rather than simply making the static field directly accessible to allow us to dynamically replace the entire mapper table if needed.

getSafeTypeByName

public RDFDatatype getSafeTypeByName(String uri)

Version of getTypeByName which will treat unknown URIs as typed literals but with just the default implementation

Parameters:

uri - the URI of the desired datatype

Returns:

Datatype the datatype definition registered at uri, if there is no such registered type it returns a new instance of the default datatype implementation, if the uri is null it returns null (indicating a plain RDF literal).

getTypeByName

public RDFDatatype getTypeByName(String uri)

Lookup a known datatype. An unkown datatype or a datatype with uri null will return null will mean that the value will be treated as a old-style plain literal.

Parameters:

uri - the URI of the desired datatype

Returns:

Datatype the datatype definition of null if not known.

getTypeByValue

public RDFDatatype getTypeByValue(Object value)

Method getTypeByValue. Look up a datatype suitable for representing the given java value object.

Parameters:

value - a value instance to be represented

Returns:

Datatype a datatype whose value space matches the java class of value

listTypes

public Iterator<RDFDatatype> listTypes()

List all the known datatypes

getTypeByClass

public RDFDatatype getTypeByClass(Class<?> clazz)

Look up a datatype suitable for representing instances of the given Java class.

Parameters:

clazz - a Java class to be represented

Returns:

a datatype whose value space matches the given java class

registerDatatype

public void registerDatatype(RDFDatatype type)

Register a new datatype

main

public static void main(String[] args)