/*
 * $Header: /home/cvs/jakarta-taglibs/mailer/src/org/apache/taglibs/mailer/ServerTag.java,v 1.4 2002/12/03 16:08:19 glenn Exp $
 * $Revision: 1.4 $
 * $Date: 2002/12/03 16:08:19 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.taglibs.mailer;

import java.util.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

/**
 * PortTag - JSP tag <b>port</b> is used for dynamically setting the mail
 *          server port that is going to be used to send the mail. The tag
 *          must be nested within a <b>mail</b> tag.
 *
 * <p>
 * JSP Tag Lib Descriptor
 * <p><pre>
 * &lt;name&gt;port&lt;/name&gt;
 * &lt;tagclass&gt;org.apache.taglibs.mailer.PortTag&lt;/tagclass&gt;
 * &lt;bodycontent&gt;JSP&lt;/bodycontent&gt;
 * &lt;info&gt;
 *     Sets the mail server port used to send the mail
 * &lt;/info&gt;
 * </pre></p></p>
 *
 * @author Rich Catlett
 * @author Martin Cooper
 *
 * @version 1.0
 *
 */
public class PortTag extends BodyTagSupport {


    /**
     *  implementation of the method from the tag interface that tells the JSP
     *  page what to do after the body of this tag
     *
     *  @throws JSPException  thrown when an error occurs while processing the
     *                        body of this method
     *
     *  @return SKIP_BODY  int telling the tag handler to not evaluate the body
     *                     of this tag again
     *
     */
    public final int doAfterBody() throws JspException {

        // parent tag must be a MailTag, gives access to methods in parent
        MailTag myparent = (MailTag)findAncestorWithClass(this, MailTag.class);

        if (myparent == null) {
            throw new JspException("port tag not nested within mail tag");
        }

        BodyContent body = getBodyContent();
        String port = body.getString();
        // Clear the body since we only used it as input for the email address
        body.clearBody();
        if (port != null) {
            port.trim();
            if (port.length() > 0) {
                myparent.resetPort(port); // set port in the parent tag
                return SKIP_BODY;
            }
        }
        throw new JspException("The port tag is empty");
    }
}