FacebookResponseHandler.java :  » Facebook » android-facebook-contact-manager » edu » bu » CS893 » data » Android Open Source

package edu.bu.CS893.data;

import java.util.ArrayList;
import java.util.HashMap;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class FacebookResponseHandler extends DefaultHandler {
  private FacebookData _fbData = new FacebookData();
  private StringBuilder _builder = new StringBuilder();
  private String _currentTag;
  private String _currentKey;

  private static String ERROR_RESPONSE = "error_response";
  private static String ERROR_CODE = "error_code";
  private static String ERROR_MSG = "error_msg";
  private static String REQUEST_ARGS = "request_args";
  private static String AUTH_TOKEN_RESPONSE = "auth_createToken_response";
  private static String KEY = "key";
  private static String VALUE = "value";
  private static String AUTH_SESSION_RESPONSE = "auth_getSession_response";
  private static String SESSION_KEY = "session_key";
  private static String UID = "uid";
  private static String EXPIRES  = "expires";
  private static String SECRET = "secret";
  private static String MESSAGE = "message";
  private static String USER = "user";
  private static String NAME = "name";
  private static String PIC = "pic_square";
  private FacebookUser _current_user;

  public FacebookData getFacebookData() {
    return _fbData;
  }

  @Override
  public void startElement(String namespaceURI, String localName,
      String qName, Attributes atts) throws SAXException {
    _currentTag = localName;

    if (_currentTag.equals(ERROR_RESPONSE)) {
    }
    else if (_currentTag.equals(REQUEST_ARGS))
      _fbData.request_args = new HashMap<String, String>();
    else if (_currentTag.equals(AUTH_SESSION_RESPONSE))
      _fbData.session = new FacebookSession();
    else if (_currentTag.equals(USER))
      _current_user = new FacebookUser();

    return;
  }

  @Override
  public void characters(char[] ch, int start, int length)
      throws SAXException {
    _builder.append(ch, start, length);
  };

  @Override
  public void endElement(String namespaceURI, String localName, String qName)
      throws SAXException {
    if (localName.equals(ERROR_CODE))
      _fbData.error_code = _builder.toString().trim();
    else if (localName.equals(ERROR_MSG))
      _fbData.error_msg = _builder.toString().trim();
    else if (localName.equals(AUTH_TOKEN_RESPONSE))
      _fbData.auth_token = _builder.toString().trim();
    else if (localName.equals(KEY))
      _currentKey = _builder.toString().trim();
    else if (localName.equals(VALUE))
      _fbData.request_args.put(_currentKey, _builder.toString().trim());
    else if (localName.equals(SESSION_KEY))
      _fbData.session.session_key = _builder.toString().trim();
    else if (localName.equals(UID)) {
      if (_current_user != null)
        _current_user.uid = Long.parseLong( _builder.toString().trim() );
      else if (_fbData.session != null)
        _fbData.session.uid = _builder.toString().trim();
    }
    else if (localName.equals(EXPIRES))
      _fbData.session.expires = _builder.toString().trim();
    else if (localName.equals(SECRET))
      _fbData.session.secret = _builder.toString().trim();
    else if (localName.equals(MESSAGE))
      _current_user.status = _builder.toString().trim();
    else if (localName.equals(USER)) {
      if (_fbData.users == null)
        _fbData.users = new ArrayList<FacebookUser>();
      _fbData.users.add(_current_user);
      _current_user = null;
    }
    else if (localName.equals(NAME))
      _current_user.name = _builder.toString().trim();
    else if (localName.equals(PIC)) {
      _current_user.pic = _builder.toString().trim();
    }
    
    _builder = new StringBuilder();
  }

}