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Implementation of the API and core database access.

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/*
 * Copyright 2009-2010 Nanjing RedOrange ltd (http://www.red-orange.cn)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package redora.service;

import redora.api.fetch.Page;
import redora.api.fetch.Scope;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;

import static redora.api.fetch.Page.ALL_FORM;
import static redora.api.fetch.Page.ALL_LIST;
import static redora.api.fetch.Page.ALL_TABLE;


public class ServletBase extends HttpServlet {

    protected Page page(HttpServletRequest req) {
        if (req.getParameter("page") != null) {
            return Page.fromJSON(req.getParameter("page"));
        } else if (req.getParameter("fetchScope") != null) {
            switch (Scope.valueOf(req.getParameter("fetchScope"))) {
                case List:
                    return ALL_LIST;
                case Table:
                    return ALL_TABLE;
                case Form:
                    return ALL_FORM;
            }
        }
        return null;
    }
}