TablePageBean.java

/**
 *  C-Nery - A home automation web application for C-Bus.
 *  Copyright (C) 2008,2009,2012  Dave Oxley <dave@daveoxley.co.uk>.
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as
 *  published by the Free Software Foundation, either version 3 of the
 *  License, or (at your option) any later version.
 *
 *  This program 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package com.daveoxley.seam;

import java.io.Serializable;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jboss.seam.annotations.In;
import org.ajax4jsf.model.ExtendedDataModel;

/**
 *
 * @author Dave Oxley <dave@daveoxley.co.uk>
 */
public abstract class TablePageBean<T> implements Serializable {

    @In
    private HttpServletRequest httpRequest;

    @In
    private HttpServletResponse httpResponse;

    private ExtendedDataModel<T> dataModel;

    private final String tableStateCookieName = getClass().getName() + "TableState";

    private String tableState = null;

    public ExtendedDataModel<T> getDataModel() {
        return dataModel;
    }

    public void setDataModel(ExtendedDataModel<T> dataModel) {
        this.dataModel = dataModel;
    }

    public boolean isPaginated() {
        return dataModel.getRowCount() > 20;
    }

    public String getTableState() {
        if (tableState == null){
            //try to get state from cookies
            Cookie[] cookies = httpRequest.getCookies();
            if (cookies != null){
                for (Cookie c : cookies){
                    if (c.getName().equals(tableStateCookieName)){
                        tableState = c.getValue();
                        break;
                    }
                }
            }
        }
        return tableState;
    }

    public void setTableState(String tableState) {
        this.tableState = tableState;
        //save state in cookies
        Cookie stateCookie = new Cookie(tableStateCookieName, this.tableState);
        stateCookie.setMaxAge(30 * 24 * 60 * 60);
        httpResponse.addCookie(stateCookie);
    }
}