TurtleEncoder constructor

TurtleEncoder({
  1. RdfNamespaceMappings? namespaceMappings,
  2. TurtleEncoderOptions options = const TurtleEncoderOptions(),
})

Creates a new Turtle encoder with the specified options.

Parameters:

  • namespaceMappings Optional custom namespace mappings to use for resolving prefixes. If not provided, default RDF namespace mappings are used.
  • options Configuration options that control encoding behavior. Default options include automatic prefix generation.

Example:

// Create an encoder with custom options
final encoder = TurtleEncoder(
  namespaceMappings: extendedNamespaces,
  options: TurtleEncoderOptions(generateMissingPrefixes: false)
);

Implementation

TurtleEncoder({
  RdfNamespaceMappings? namespaceMappings,
  TurtleEncoderOptions options = const TurtleEncoderOptions(),
})  : _options = options,
      // Use default namespace mappings if none provided
      _namespaceMappings = namespaceMappings ?? RdfNamespaceMappings() {
  _iriCompaction = IriCompaction(
    _namespaceMappings,
    IriCompactionSettings(
        generateMissingPrefixes: options.generateMissingPrefixes,
        renderFragmentsAsPrefixed: options.renderFragmentsAsPrefixed,
        iriRelativization: options.iriRelativization,
        allowedCompactionTypes: {
          ...allowedCompactionTypesAll,
          IriRole.predicate: {
            IriCompactionType.full,
            IriCompactionType.prefixed,
            // Allow relative IRIs for predicates when fragments should be rendered as relative
            if (!options.renderFragmentsAsPrefixed) IriCompactionType.relative
          },
          IriRole.type: {IriCompactionType.full, IriCompactionType.prefixed}
        },
        specialPredicates: {
          Rdf.type,
        },
        specialDatatypes: {
          _booleanDatatype,
          _decimalDatatype,
          //_doubleDatatype,
          _integerDatatype,
          _stringDatatype,
          Rdf.langString,
        }),
    (String localPart) => RdfNamespaceMappings.isValidLocalPart(localPart,
        allowNumericLocalNames: options.useNumericLocalNames),
  );
}