nosuchpagetag.java

wiki建站资源 java编写的 很好用

/* 
    JSPWiki - a JSP-based WikiWiki clone.

    Copyright (C) 2001-2002 Janne Jalkanen ([e-mail])

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package com.ecyrd.jspwiki.tags;

import java.io.IOException;

import com.ecyrd.jspwiki.WikiEngine;
import com.ecyrd.jspwiki.WikiPage;
import com.ecyrd.jspwiki.providers.ProviderException;

/**
 *  Includes the body in case there is no such page available.
 *
 *  @author Janne Jalkanen
 *  @since 2.0
 */
public class NoSuchPageTag
    extends WikiTagBase
{
    private String m_pageName;

    public void setPage( String name )
    {
        m_pageName = name;
    }

    public String getPage()
    {
        return m_pageName;
    }

    public int doWikiStartTag()
        throws IOException,
               ProviderException
    {
        WikiEngine engine = m_wikiContext.getEngine();
        WikiPage   page;

        if( m_pageName == null )
        {
            page = m_wikiContext.getPage();
        }
        else
        {
            page = engine.getPage( m_pageName );
        }

        // System.out.println("Checking "+page);

        if( page != null && engine.pageExists( page.getName(), page.getVersion() ) )
        {
            return SKIP_BODY;
        }

        return EVAL_BODY_INCLUDE;
    }
}