Java tutorial
/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 1997-2017 Oracle and/or its affiliates. All rights reserved. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common Development * and Distribution License("CDDL") (collectively, the "License"). You * may not use this file except in compliance with the License. You can * obtain a copy of the License at * https://oss.oracle.com/licenses/CDDL+GPL-1.1 * or LICENSE.txt. See the License for the specific * language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each * file and include the License file at LICENSE.txt. * * GPL Classpath Exception: * Oracle designates this particular file as subject to the "Classpath" * exception as provided by Oracle in the GPL Version 2 section of the License * file that accompanied this code. * * Modifications: * If applicable, add the following below the License Header, with the fields * enclosed by brackets [] replaced by your own identifying information: * "Portions Copyright [year] [name of copyright owner]" * * Contributor(s): * If you wish your version of this file to be governed by only the CDDL or * only the GPL Version 2, indicate your decision by adding "[Contributor] * elects to include this software in this distribution under the [CDDL or GPL * Version 2] license." If you don't indicate a single choice of license, a * recipient has the option to distribute your version of this file under * either the CDDL, the GPL Version 2 or to extend the choice of license to * its licensees as provided above. However, if you add GPL Version 2 code * and therefore, elected the GPL Version 2 license, then the option applies * only if the new code is made subject to such option by the copyright * holder. */ package javax.mail; /** * The Provider is a class that describes a protocol * implementation. The values typically come from the * javamail.providers and javamail.default.providers * resource files. An application may also create and * register a Provider object to dynamically add support * for a new provider. * * @author Max Spivak * @author Bill Shannon */ public class Provider { /** * This inner class defines the Provider type. * Currently, STORE and TRANSPORT are the only two provider types * supported. */ public static class Type { public static final Type STORE = new Type("STORE"); public static final Type TRANSPORT = new Type("TRANSPORT"); private String type; private Type(String type) { this.type = type; } @Override public String toString() { return type; } } private Type type; private String protocol, className, vendor, version; /** * Create a new provider of the specified type for the specified * protocol. The specified class implements the provider. * * @param type Type.STORE or Type.TRANSPORT * @param protocol valid protocol for the type * @param classname class name that implements this protocol * @param vendor optional string identifying the vendor (may be null) * @param version optional implementation version string (may be null) * @since JavaMail 1.4 */ public Provider(Type type, String protocol, String classname, String vendor, String version) { this.type = type; this.protocol = protocol; this.className = classname; this.vendor = vendor; this.version = version; } /** * Returns the type of this Provider. * * @return the provider type */ public Type getType() { return type; } /** * Returns the protocol supported by this Provider. * * @return the protocol */ public String getProtocol() { return protocol; } /** * Returns the name of the class that implements the protocol. * * @return the class name */ public String getClassName() { return className; } /** * Returns the name of the vendor associated with this implementation * or null. * * @return the vendor */ public String getVendor() { return vendor; } /** * Returns the version of this implementation or null if no version. * * @return the version */ public String getVersion() { return version; } /** Overrides Object.toString() */ @Override public String toString() { String s = "javax.mail.Provider[" + type + "," + protocol + "," + className; if (vendor != null) s += "," + vendor; if (version != null) s += "," + version; s += "]"; return s; } }