Package cz.cvut.kbss.jopa.oom.converter

Class ToRdfLiteralConverter

java.lang.Object
cz.cvut.kbss.jopa.oom.converter.ToRdfLiteralConverter
All Implemented Interfaces:
AttributeConverter<String,Object>, ConverterWrapper<String,Object>
public class ToRdfLiteralConverter extends Object implements ConverterWrapper<String,Object>
Converter for working with RDF literals with explicit datatype mapping (Literal).

The attribute value then represents the lexical form of the literal and should be a String.

Note that the conversion to attribute value does not perform any validation regarding match between the value and the specified datatype IRI. So, for example, a value read from the repository as Integer will be mapped by this converter to an attribute with datatype xsd:boolean without any exceptions.

  • Constructor Details

    • ToRdfLiteralConverter

      public ToRdfLiteralConverter(String datatype)

  • Method Details

    • convertToAxiomValue

      public Object convertToAxiomValue(String value)
      Description copied from interface: AttributeConverter
      Converts the value stored in the entity attribute into the data representation to be stored in the repository and supported by the OntoDriver API.
      Specified by:
      convertToAxiomValue in interface AttributeConverter<String,Object>
      Parameters:
      value - Value to convert
      Returns:
      Converted data

    • convertToAttribute

      public String convertToAttribute(Object value)
      Description copied from interface: AttributeConverter
      Converts the data stored in the repository into the value to be stored in the entity attribute.

      Note that it is the responsibility of the converter writer to specify the correct value type for the corresponding value for use by the OntoDriver: i.e., persistence providers are not expected to do such type conversion.

      Specified by:
      convertToAttribute in interface AttributeConverter<String,Object>
      Parameters:
      value - Value to convert
      Returns:
      Converted data

    • supportsAxiomValueType

      public boolean supportsAxiomValueType(Class<?> type)
      Description copied from interface: ConverterWrapper
      Checks whether the wrapped converter supports converting the specified axiom value type.
      Specified by:
      supportsAxiomValueType in interface ConverterWrapper<String,Object>
      Parameters:
      type - Axiom value type
      Returns:
      Whether the type is supported by this wrapper