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/*

 * 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 gr.ebs.gss.client.rest;

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

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

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

import com.google.gwt.user.client.rpc.AsyncCallback;

/**

 * @author kman

 */

public abstract class RestGetCallback implements RequestCallback {

        private static final int HTTP_OK = 200;

        private AsyncCallback callback;

        private String path;

        private int okcode = -1;

        public RestGetCallback(String path, AsyncCallback callback) {

                this.callback = callback;

                this.path = path;

        }

        public RestGetCallback(String path, AsyncCallback callback, int okCode) {

                this.callback = callback;

                this.path = path;

                okcode = okCode;

        }

        public void onError(Request request, Throwable exception) {

                callback.onFailure(exception);

        }

        public void onResponseReceived(Request request, Response response) {

                try {

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

                                callback.onSuccess(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))

                                callback.onSuccess(deserialize(response));

                        else

                                callback.onFailure(new RestException(path, response.getStatusCode(), response.getStatusText(), response.getText()));

                } catch (Exception e) {

                        callback.onFailure(e);

                }

        }

        public abstract Object deserialize(Response response);

}