/**
 * @file
 * $Revision: 1.2 $
 * $Date: 2007/01/30 22:12:22 $
 *
 *   Unless noted otherwise, the portions of Isis written by the USGS are
 *   public domain. See individual third-party library and package descriptions
 *   for intellectual property information, user agreements, and related
 *   information.
 *
 *   Although Isis has been used by the USGS, no warranty, expressed or
 *   implied, is made by the USGS as to the accuracy and functioning of such
 *   software and related material nor shall the fact of distribution
 *   constitute any such warranty, and no responsibility is assumed by the
 *   USGS in connection therewith.
 *
 *   For additional information, launch
 *   $ISISROOT/doc//documents/Disclaimers/Disclaimers.html
 *   in a browser or see the Privacy &amp; Disclaimers page on the Isis website,
 *   http://isis.astrogeology.usgs.gov, and the USGS privacy and disclaimers on
 *   http://www.usgs.gov/privacy.html.
 */

#include <string>

#include <xercesc/sax2/SAX2XMLReader.hpp>
#include <xercesc/sax2/Attributes.hpp>
#include <xercesc/util/PlatformUtils.hpp>

#include "IsisXMLApplication.h"
#include "IsisXMLChTrans.h"

#include "IString.h"

using namespace std;

// Constructors
IsisXMLApplication::IsisXMLApplication(char *PencodingName,
                                       bool &PexpandNamespaces,
                                       XERCES::SAX2XMLReader* &Pparser,
                                       IsisAmlData *PappData) {

  encodingName = PencodingName;
  expandNamespaces = PexpandNamespaces;
  parser = Pparser;
  appData = PappData;

  parser->setContentHandler(this);
  parser->setErrorHandler(this);

  briefHandler = NULL;
  descriptionHandler = NULL;
  groupsHandler = NULL;
  multipleValuesHandler = NULL;
  ignoreHandler = NULL;
  historyHandler = NULL;

}

IsisXMLApplication::~IsisXMLApplication() {

  if(briefHandler != NULL) delete briefHandler;
  if(descriptionHandler != NULL) delete descriptionHandler;
  if(groupsHandler != NULL) delete groupsHandler;
  if(multipleValuesHandler != NULL) delete multipleValuesHandler;
  if(ignoreHandler != NULL) delete ignoreHandler;
  if(historyHandler != NULL) delete historyHandler;
}


// Callback methodes for handling pieces of the xml file

//  IsisXMLApplication: Overrides of the SAX DocumentHandler interface
void IsisXMLApplication::characters(const XMLCh *const chars,
                                    const XMLSize_t length) {}



void IsisXMLApplication::endDocument() {}


void IsisXMLApplication::endElement(const XMLCh *const uri,
                                    const XMLCh *const localname,
                                    const XMLCh *const qname) {
}


void IsisXMLApplication::processingInstruction(const XMLCh *const target,
    const XMLCh *const data) {}


void IsisXMLApplication::startDocument() {}


void IsisXMLApplication::startElement(const XMLCh *const uri,
                                      const XMLCh *const localname,
                                      const XMLCh *const qname,
                                      const XERCES::Attributes &attributes) {

  if((string)XERCES::XMLString::transcode(localname) == (string)"application")  {
    QString name = XERCES::XMLString::transcode(attributes.getValue((XMLSize_t)0));
    appData->name = name.toLower();
  }
  else if((string)XERCES::XMLString::transcode(localname) == (string)"brief")  {
    if(briefHandler != NULL) {
      delete briefHandler;
      briefHandler = NULL;
    }
    briefHandler = new IsisXMLHandler(encodingName, expandNamespaces,
                                      parser, &appData->brief);
  }
  else if((string)XERCES::XMLString::transcode(localname) == (string)"description")  {
    if(descriptionHandler != NULL) {
      delete descriptionHandler;
      descriptionHandler = NULL;
    }
    descriptionHandler = new IsisXMLHandler(encodingName, expandNamespaces,
                                            parser, &appData->description);
  }
  else if((string)XERCES::XMLString::transcode(localname) == (string)"groups")  {
    if(groupsHandler != NULL) {
      delete groupsHandler;
      groupsHandler = NULL;
    }
    groupsHandler = new IsisXMLGroups(encodingName, expandNamespaces, parser,
                                      &appData->groups);
  }
  else if((string)XERCES::XMLString::transcode(localname) == (string)"category")  {
    if(multipleValuesHandler != NULL) {
      delete multipleValuesHandler;
      multipleValuesHandler = NULL;
    }
    multipleValuesHandler = new IsisXMLMultipleValues(encodingName, expandNamespaces,
        parser, &appData->categorys);
  }
  else if((string)XERCES::XMLString::transcode(localname) == (string)"history")  {
    if(historyHandler != NULL) {
      delete historyHandler;
      historyHandler = NULL;
    }
    historyHandler = new IsisXMLHistory(encodingName, expandNamespaces,
                                        parser, &appData->changes);
  }
  else {
    if(ignoreHandler != NULL) {
      delete ignoreHandler;
      ignoreHandler = NULL;
    }
    ignoreHandler = new IsisXMLIgnore(encodingName, expandNamespaces, parser,
                                      (string)XERCES::XMLString::transcode(localname));
  }
}
