/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * 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.http.impl.nio.pool;
  
  import java.io.IOException;
  
  import javax.net.ssl.SSLContext;
  
  import org.apache.http.HttpHost;
  import org.apache.http.HttpResponseFactory;
  import org.apache.http.annotation.Immutable;
  import org.apache.http.impl.DefaultHttpResponseFactory;
  import org.apache.http.impl.nio.DefaultNHttpClientConnectionFactory;
  import org.apache.http.impl.nio.SSLNHttpClientConnectionFactory;
  import org.apache.http.nio.NHttpClientConnection;
  import org.apache.http.nio.NHttpConnectionFactory;
  import org.apache.http.nio.pool.NIOConnFactory;
  import org.apache.http.nio.reactor.IOEventDispatch;
  import org.apache.http.nio.reactor.IOSession;
  import org.apache.http.nio.reactor.ssl.SSLSetupHandler;
  import org.apache.http.nio.util.ByteBufferAllocator;
  import org.apache.http.nio.util.HeapByteBufferAllocator;
  import org.apache.http.params.HttpParams;
  
  /**
   * A basic {@link NIOConnFactory} implementation that creates
   * {@link NHttpClientConnection} instances given a {@link HttpHost} instance.
   * <p>
   * The following parameters can be used to customize the behavior of this
   * class:
   * <ul>
   *  <li>{@link org.apache.http.params.CoreProtocolPNames#HTTP_ELEMENT_CHARSET}</li>
   *  <li>{@link org.apache.http.params.CoreConnectionPNames#SOCKET_BUFFER_SIZE}</li>
   *  <li>{@link org.apache.http.params.CoreConnectionPNames#MAX_HEADER_COUNT}</li>
   *  <li>{@link org.apache.http.params.CoreConnectionPNames#MAX_LINE_LENGTH}</li>
   * </ul>
   *
   * @since 4.2
   */
  @Immutable
  public class BasicNIOConnFactory implements NIOConnFactory<HttpHost, NHttpClientConnection> {
  
      private final NHttpConnectionFactory<? extends NHttpClientConnection> plainFactory;
      private final NHttpConnectionFactory<? extends NHttpClientConnection> sslFactory;
  
      public BasicNIOConnFactory(
              final NHttpConnectionFactory<? extends NHttpClientConnection> plainFactory,
              final NHttpConnectionFactory<? extends NHttpClientConnection> sslFactory) {
          super();
          if (plainFactory == null) {
              throw new IllegalArgumentException("Plain HTTP client connection factory may not be null");
          }
          this.plainFactory = plainFactory;
          this.sslFactory = sslFactory;
      }
  
      public BasicNIOConnFactory(
              final NHttpConnectionFactory<? extends NHttpClientConnection> plainFactory) {
          this(plainFactory, null);
      }
  
      public BasicNIOConnFactory(
              final SSLContext sslcontext,
              final SSLSetupHandler sslHandler,
              final HttpResponseFactory responseFactory,
              final ByteBufferAllocator allocator,
              final HttpParams params) {
          this(new DefaultNHttpClientConnectionFactory(
                  responseFactory, allocator, params),
                  new SSLNHttpClientConnectionFactory(
                          sslcontext, sslHandler, responseFactory, allocator, params));
      }
  
      public BasicNIOConnFactory(
              final SSLContext sslcontext,
             final SSLSetupHandler sslHandler,
             final HttpParams params) {
         this(sslcontext, sslHandler,
                 new DefaultHttpResponseFactory(), new HeapByteBufferAllocator(), params);
     }
 
     public BasicNIOConnFactory(final HttpParams params) {
         this(null, null, params);
     }
 
     public NHttpClientConnection create(final HttpHost route, final IOSession session) throws IOException {
         NHttpClientConnection conn;
         if (route.getSchemeName().equalsIgnoreCase("https")) {
             if (this.sslFactory == null) {
                 throw new IOException("SSL not supported");
             }
             conn = this.sslFactory.createConnection(session);
         } else {
             conn = this.plainFactory.createConnection(session);
         }
         session.setAttribute(IOEventDispatch.CONNECTION_KEY, conn);
         return conn;
     }
 
 }