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What this is

This file is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

 * Copyright 2001-2004 The Apache Software Foundation
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
import java.util.Enumeration;
import java.util.Vector;

 * A class used to represent forward and reverse relay paths.  The
 * SMTP MAIL command requires a reverse relay path while the SMTP RCPT
 * command requires a forward relay path.  See RFC 821 for more details.
 * In general, you will not have to deal with relay paths.


* @author Daniel F. Savarese * @see SMTPClient ***/ public final class RelayPath { Vector _path; String _emailAddress; /*** * Create a relay path with the specified email address as the ultimate * destination. *

* @param emailAddress The destination email address. ***/ public RelayPath(String emailAddress) { _path = new Vector(); _emailAddress = emailAddress; } /*** * Add a mail relay host to the relay path. Hosts are added left to * right. For example, the following will create the path * <, > *

     * path = new RelayPath("");
     * path.addRelay("");
     * path.addRelay("");

* @param hostname The host to add to the relay path. ***/ public void addRelay(String hostname) { _path.addElement(hostname); } /*** * Return the properly formatted string representation of the relay path. *

* @return The properly formatted string representation of the relay path. ***/ public String toString() { StringBuffer buffer = new StringBuffer(); Enumeration hosts; buffer.append('<'); hosts = _path.elements(); if (hosts.hasMoreElements()) { buffer.append('@'); buffer.append((String)hosts.nextElement()); while (hosts.hasMoreElements()) { buffer.append(",@"); buffer.append((String)hosts.nextElement()); } buffer.append(':'); } buffer.append(_emailAddress); buffer.append('>'); return buffer.toString(); } }

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