Pithos_GSS » GSS

/*

 * Copyright 2009 Electronic Business Systems Ltd.

 *

 * This file is part of GSS.

 *

 * GSS is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * GSS is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with GSS.  If not, see <http://www.gnu.org/licenses/>.

 */

package org.gss_project.gss.web.client.rest;

import com.google.gwt.http.client.Request;

import com.google.gwt.http.client.RequestCallback;

import com.google.gwt.http.client.Response;

/**

 * @author kman

 *

 */

public abstract class RestCallback  implements RequestCallback {

        private static final int HTTP_OK = 200;

        private String path;

        private int okcode = -1;

        public RestCallback(String aPath) {

                path = aPath;

        }

        public RestCallback(String aPath, int okCode) {

                path = aPath;

                okcode = okCode;

        }

        @Override

        public void onError(Request request, Throwable exception) {

                handleError(request, exception);

        }

        @Override

        public void onResponseReceived(Request request, Response response) {

                try {

                        if (okcode == -1 && response.getStatusCode() == HTTP_OK)

                                handleSuccess(deserialize(response));

                        //this one is only used for trash handling where empty trash has 201 status code

                        else if(okcode !=-1 && (response.getStatusCode() == okcode || response.getStatusCode() == HTTP_OK))

                                handleSuccess(deserialize(response));

                        else if(response.getStatusCode() == 403)

                                RestCommand.sessionExpired();

                        else {

                                String statusText = "";

                                String text = "";

                                // Ignore JavaScript errors caused by non-existent text.

                                try {

                                        statusText = response.getStatusText();

                                } catch (Exception e) {        }

                                try {

                                        text = response.getText();

                                } catch (Exception e) {        }

                                handleError(request, new RestException(path, response.getStatusCode(), statusText, text));

                        }

                } catch (Exception e) {

                        handleError(request,e);

                }

        }

        public abstract void handleSuccess(Object object);

        public abstract void handleError(Request request, Throwable exception);

        public abstract Object deserialize(Response response);

}