Package org.eclipse.rdf4j.rio.datatypes
Class DBPediaDatatypeHandler
- java.lang.Object
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- org.eclipse.rdf4j.rio.datatypes.DBPediaDatatypeHandler
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- All Implemented Interfaces:
DatatypeHandler
public class DBPediaDatatypeHandler extends Object implements DatatypeHandler
An implementation of a datatype handler that can process DBPedia datatypes.- Author:
- Peter Ansell
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Field Summary
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Fields inherited from interface org.eclipse.rdf4j.rio.DatatypeHandler
DBPEDIA, GEOSPARQL, RDFDATATYPES, VIRTUOSOGEOMETRY, XMLSCHEMA
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Constructor Summary
Constructors Constructor Description DBPediaDatatypeHandler()
Default constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description String
getKey()
A unique key for this datatype handler to identify it in the DatatypeHandlerRegistry.boolean
isRecognizedDatatype(IRI datatypeUri)
Checks if the given datatype URI is recognized by this datatype handler.Literal
normalizeDatatype(String literalValue, IRI datatypeUri, ValueFactory valueFactory)
Normalize both the datatype URI and the literal value if appropriate, and use the given value factory to generate a literal matching a literal value and datatype URI.boolean
verifyDatatype(String literalValue, IRI datatypeUri)
Verifies that the datatype URI is valid, including a check on the structure of the literal value.
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Method Detail
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isRecognizedDatatype
public boolean isRecognizedDatatype(IRI datatypeUri)
Description copied from interface:DatatypeHandler
Checks if the given datatype URI is recognized by this datatype handler.- Specified by:
isRecognizedDatatype
in interfaceDatatypeHandler
- Parameters:
datatypeUri
- The datatype URI to check.- Returns:
- True if the datatype is syntactically valid and could be used with
DatatypeHandler.verifyDatatype(String, IRI)
andDatatypeHandler.normalizeDatatype(String, IRI, ValueFactory)
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verifyDatatype
public boolean verifyDatatype(String literalValue, IRI datatypeUri) throws LiteralUtilException
Description copied from interface:DatatypeHandler
Verifies that the datatype URI is valid, including a check on the structure of the literal value.This method must only be called after verifying that
DatatypeHandler.isRecognizedDatatype(IRI)
returns true for the given datatype URI.- Specified by:
verifyDatatype
in interfaceDatatypeHandler
- Parameters:
literalValue
- Literal value matching the given datatype URI.datatypeUri
- A datatype URI that matched withDatatypeHandler.isRecognizedDatatype(IRI)
- Returns:
- True if the datatype URI is recognized by this datatype handler, and it is verified to be syntactically valid.
- Throws:
LiteralUtilException
- If the datatype was not recognized.
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normalizeDatatype
public Literal normalizeDatatype(String literalValue, IRI datatypeUri, ValueFactory valueFactory) throws LiteralUtilException
Description copied from interface:DatatypeHandler
Normalize both the datatype URI and the literal value if appropriate, and use the given value factory to generate a literal matching a literal value and datatype URI.This method must only be called after verifying that
DatatypeHandler.isRecognizedDatatype(IRI)
returns true for the given datatype URI, andDatatypeHandler.verifyDatatype(String, IRI)
also returns true for the given datatype URI and literal value.- Specified by:
normalizeDatatype
in interfaceDatatypeHandler
- Parameters:
literalValue
- Required literal value to use in the normalization process and to provide the value for the resulting literal.datatypeUri
- The datatype URI which is to be normalized. This URI is available in normalized form from the result usingLiteral.getDatatype()
.valueFactory
- TheValueFactory
to use to create the result literal.- Returns:
- A
Literal
containing the normalized literal value and datatype URI. - Throws:
LiteralUtilException
- If the datatype URI was not recognized or verified, or the literal value could not be normalized due to an error.
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getKey
public String getKey()
Description copied from interface:DatatypeHandler
A unique key for this datatype handler to identify it in the DatatypeHandlerRegistry.- Specified by:
getKey
in interfaceDatatypeHandler
- Returns:
- A unique string key.
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