userstatustag.java

jGossip是一个简单而功能强大的Java论坛软件（消息板）

/*
 * $$Id: UserStatusTag.java,v 1.7 2004/05/12 22:41:19 bel70 Exp $$
 *
 * ***** BEGIN LICENSE BLOCK *****
 * 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 JGossip forum code.
 *
 * The Initial Developer of the Original Code is the JResearch, Org.
 * Portions created by the Initial Developer are Copyright (C) 2004
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *              Dmitry Belov <[e-mail]>
 *
 * ***** END LICENSE BLOCK ***** */
/*
 * Created on Sep 19, 2003
 *
 */
package org.jresearch.gossip.tags;

import org.apache.struts.Globals;
import org.apache.struts.util.MessageResources;

import org.apache.taglibs.standard.lang.support.ExpressionEvaluatorManager;

import org.jresearch.gossip.IConst;
import org.jresearch.gossip.configuration.Configurator;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;


/**
 * DOCUMENT ME!
 *
 * @author Bel
 */
public class UserStatusTag extends TagSupport {
    private String status;

    /**
     * DOCUMENT ME!
     *
     * @param status DOCUMENT ME!
     */
    public void setStatus(String status) {
        this.status = status;
    }

    /**
     * DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     */
    public String getStatus() {
        return status;
    }

    private void eval() throws JspException {
        status = ExpressionEvaluatorManager.evaluate("status", status,
                String.class, this, pageContext).toString();
    }

    /**
     * DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     *
     * @throws JspException DOCUMENT ME!
     */
    public int doStartTag() throws JspException {
        try {
            eval();

            MessageResources messages = (MessageResources) pageContext.getServletContext()
                                                                      .getAttribute(Globals.MESSAGES_KEY +
                    Configurator.getInstance().get(IConst.CONFIG.MODULE_PREFIX));

            String key = IConst.CONTEXT.STATUS_KEY_PREFIX + this.status;
            messages.setReturnNull(true);

            String statusString = messages.getMessage(key);

            if (statusString == null) {
                statusString = messages.getMessage(IConst.CONTEXT.STATUS_KEY_PREFIX +
                        "X");
            }

            pageContext.getOut().print(statusString);
            messages.setReturnNull(false);
        } catch (Exception ex) {
            throw new JspException("error in UserStatusTag tag:", ex);
        }

        return (SKIP_BODY);
    }
}