page.java

来自「开源项目CRM之OpenCustomer」· Java 代码 · 共 93 行

/*******************************************************************************
 * ***** BEGIN LICENSE BLOCK Version: MPL 1.1
 * 
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
 * the specific language governing rights and limitations under the License.
 * 
 * The Original Code is the OpenCustomer CRM.
 * 
 * The Initial Developer of the Original Code is Thomas Bader (Bader & Jene
 * Software-Ingenieurb黵o). Portions created by the Initial Developer are
 * Copyright (C) 2005 the Initial Developer. All Rights Reserved.
 * 
 * Contributor(s): Thomas Bader <[e-mail]>
 * 
 * ***** END LICENSE BLOCK *****
 */

package org.opencustomer.web.util;

import javax.servlet.http.HttpServletRequest;

public final class Page
{
    int step;

    int page;

    public Page(int step, int page)
    {
        this.setStep(step);
        this.setPage(page);
    }

    public final int getPage()
    {
        return page;
    }

    public final void setPage(int page)
    {
        if (page < 1)
            this.page = 1;
        else
            this.page = page;
    }

    public final int getStep()
    {
        return step;
    }

    public final void setStep(int step)
    {
        this.step = step;
    }

    public final int getFirstEntry()
    {
        return getLastEntry() - step + 1;
    }

    public final int getLastEntry()
    {
        return step * page;
    }

    public final static int parseRequest(HttpServletRequest request)
    {
        int page = 1;

        String param = RequestUtility.parseRequest(request, null, "page");

        if (param != null)
        {
            try
            {
                page = Integer.parseInt(param);
            }
            catch (NumberFormatException e)
            {
            }
        }

        return page;
    }

}