/*
 * Copyright 2010 netling project <http://netling.org>
 *
 * 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
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * This file may incorporate work covered by the following copyright and
 * permission notice:
 *
 *     Licensed to the Apache Software Foundation (ASF) under one
 *     or more contributor license agreements.  See the NOTICE file
 *     distributed with this work for additional information
 *     regarding copyright ownership.  The ASF licenses this file
 *     to you 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
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 *      Unless required by applicable law or agreed to in writing,
 *      software distributed under the License is distributed on an
 *      "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *      KIND, either express or implied.  See the License for the
 *      specific language governing permissions and limitations
 *      under the License.
 */
package org.netling.ftp;

import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;

import javax.net.ServerSocketFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLServerSocket;

/**
 * Server socket factory for FTPS connections.
 */
public class FTPSServerSocketFactory extends ServerSocketFactory {

    /** Factory for secure socket factories */
    private final SSLContext context;

    public FTPSServerSocketFactory(SSLContext context) {
        this.context = context;
    }

    @Override
    public ServerSocket createServerSocket(int port) throws IOException {
        return init(this.context.getServerSocketFactory().createServerSocket(port));
    }

    @Override
    public ServerSocket createServerSocket(int port, int backlog) throws IOException {
        return init(this.context.getServerSocketFactory().createServerSocket(port, backlog));
    }

    @Override
    public ServerSocket createServerSocket(int port, int backlog, InetAddress ifAddress) throws IOException {
        return init(this.context.getServerSocketFactory().createServerSocket(port, backlog, ifAddress));
    }

    /**
     * Sets the socket so newly accepted connections will use SSL client mode.
     * 
     * @param socket the SSLServerSocket to initialise
     * @return the socket
     * @throws ClassCastException if socket is not an instance of SSLServerSocket
     */
    public ServerSocket init(ServerSocket socket) {
        ((SSLServerSocket) socket).setUseClientMode(true);
        return socket;
    }
}