ifnosearchresultstag.java

来自「JSP 的一个wiki 系统」· Java 代码 · 共 48 行

/* 
    JSPWiki - a JSP-based WikiWiki clone.

    Copyright (C) 2001-2004 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 java.util.Collection;
import javax.servlet.jsp.PageContext;

/**
 *  If there have been no search results, then outputs the body text.
 *
 *  @author Janne Jalkanen
 *  @since 2.0
 */
public class IfNoSearchResultsTag
    extends WikiTagBase
{
    public final int doWikiStartTag()
        throws IOException
    {
        Collection list = (Collection)pageContext.getAttribute( "searchresults",
                                                                PageContext.REQUEST_SCOPE );
        if( list == null || list.size() == 0 )
        {   
            return EVAL_BODY_INCLUDE;
        }

        return SKIP_BODY;
    }
}