NetexXmlParser.java

package org.opentripplanner.netex.loader;

import jakarta.xml.bind.JAXBContext;
import jakarta.xml.bind.JAXBElement;
import jakarta.xml.bind.JAXBException;
import jakarta.xml.bind.Unmarshaller;
import java.io.InputStream;
import org.rutebanken.netex.model.PublicationDeliveryStructure;

/** Simple wrapper to perform typesafe xml parsing and simple error handling. */
public class NetexXmlParser {

  /** used to parse the XML. */
  private final Unmarshaller unmarshaller;

  public NetexXmlParser() {
    this.unmarshaller = createUnmarshaller();
  }

  /**
   * Parse an input stream and return the root document type for the given xml file (stream).
   */
  public PublicationDeliveryStructure parseXmlDoc(InputStream stream) throws JAXBException {
    JAXBElement<PublicationDeliveryStructure> root;

    //noinspection unchecked
    root = (JAXBElement<PublicationDeliveryStructure>) unmarshaller.unmarshal(stream);

    return root.getValue();
  }

  /** factory method for unmarshaller */
  private static Unmarshaller createUnmarshaller() {
    try {
      return JAXBContext.newInstance(PublicationDeliveryStructure.class).createUnmarshaller();
    } catch (JAXBException e) {
      // This is a programming error - not expected!
      // We abort early and also allow for this to happen in the constructor;
      // Which in other cases would be considered bad practice.
      throw new RuntimeException(e);
    }
  }
}