JaxbHelper.java 文件源码

/**
 * Returns the schema namespace URI for the specified JAXB type. The URI
 * can then be used to create a {@link QName} instance that is necessary
 * to instantiate a {@link JAXBElement}.
 *
 * @param type a JAXB generated type.
 * @return the namespace URI.
 */
@SuppressWarnings("unchecked")
public static String getNamespaceUriForType( Class<?> type )
{
  String pkgInfoFqcn = type.getPackage().getName() + ".package-info";
  try
  {
    /*
     * package-info.class is a special class generated by JAXB - it contains the schema namespace
     * URI for all generated classes.
     */
    Class<?> pkgInfo = Class.forName( pkgInfoFqcn );
    XmlSchema schema = pkgInfo.getAnnotation( XmlSchema.class );
    return schema.namespace();
  }
  catch ( ClassNotFoundException e )
  {
    return null;
  }
}