ifuserinroletag.java

老外的在线考试

/*
 * Core - Library of useful classes that are used in many CyberDemia projects.
 * Copyright (C) 2004 CyberDemia Research and Services
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA  02111-1307, USA.
 *
 * See the COPYING file located in the top-level-directory of
 * the archive of this library for complete text of license.
 */
package com.cyberdemia.jsp;

import javax.servlet.http.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.IOException;

/**
 * IfUserInRoleTag conditionally includes the body in the output if the user has the specified role.
 *
 * @author Alexander Yap
 * @version $Revision: 1.1 $ at $Date: 2004/03/22 06:56:38 $ by $Author: alexycyap $
 *
 */
public class IfUserInRoleTag extends BodyTagSupport
{
	public int doAfterBody() throws JspException
	{
		HttpServletRequest request = (HttpServletRequest)pageContext.getRequest();
		boolean inverse = Boolean.valueOf( m_inverse ).booleanValue();
		BodyContent body = getBodyContent();
		String bodyStr = body.getString();
		body.clearBody();

		try
		{
			if (inverse)
			{
				if (!request.isUserInRole(m_role))
				{
					getPreviousOut().print( bodyStr );
				}
			}
			else
			{
				if (request.isUserInRole(m_role))
				{
					getPreviousOut().print( bodyStr );
				}
			}
		}
		catch (IOException ioex)
		{
			throw new JspException("Error writing authorized content for role "+m_role,ioex);
		}

		return SKIP_BODY;
	}

	public void setRole(String role)
	{
		m_role = role;
	}

	public void setInverse(String inv)
	{
		m_inverse = inv;
	}

	private String m_role = null;
	private String m_inverse = null;
}