ShortConverter.java :  » Search-Engine » semweb4j » org » ontoware » rdfreactor » runtime » converter » Java Open Source

package org.ontoware.rdfreactor.runtime.converter;

import org.ontoware.rdf2go.model.Model;
import org.ontoware.rdf2go.model.node.DatatypeLiteral;
import org.ontoware.rdf2go.model.node.LanguageTagLiteral;
import org.ontoware.rdf2go.model.node.Literal;
import org.ontoware.rdf2go.model.node.Node;
import org.ontoware.rdf2go.model.node.PlainLiteral;
import org.ontoware.rdf2go.model.node.URI;
import org.ontoware.rdf2go.vocabulary.XSD;
import org.ontoware.rdfreactor.runtime.INodeConverter;
import org.ontoware.rdfreactor.runtime.RDFDataException;

public class ShortConverter implements INodeConverter<Short> {

  public Short toJava(Node node) {
    return node2Short(node);
  }

  public static Short node2Short(Node node) {
    if (node == null)
      return null;

    if (node instanceof PlainLiteral) {
      return toShort(node.asLiteral());
    }

    if (node instanceof LanguageTagLiteral) {
      throw new RDFDataException(
          "Cannot convert a language tagged literal to an Short - it makes no sense");
    }

    if (node instanceof DatatypeLiteral) {
      URI datatype = node.asDatatypeLiteral().getDatatype();
      if (datatype.equals(XSD._short)) {
        return toShort(node.asDatatypeLiteral());
      } else {
        throw new RDFDataException("Cannot convert from datatype "
            + datatype + " to URI");
      }
    }

    throw new RDFDataException("Cannot convert from " + node.getClass()
        + " to Short");
  }

  public static Short toShort(Literal literal) {
    return new Short(Short.parseShort(literal.getValue()));
  }
  
  public Node toNode(Model model, Object javaValue) {
    return model.createDatatypeLiteral( ""+(Short) javaValue, XSD._short);
  }


}