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    1   /*
    2    * Copyright 2009 Red Hat, Inc.
    3    *
    4    * Red Hat licenses this file to you under the Apache License, version 2.0
    5    * (the "License"); you may not use this file except in compliance with the
    6    * License.  You may obtain a copy of the License at:
    7    *
    8    *    http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
    13   * License for the specific language governing permissions and limitations
    14   * under the License.
    15   */
    16  package org.jboss.netty.handler.codec.serialization;
    17
    18  import java.io.FilterInputStream;
    19  import java.io.InputStream;
    20
    21  /**
    22   * {@link FilterInputStream} which allows a user to change the underlying
    23   * stream at any time.
    24   *
    25   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
    26   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
    27   *
    28   * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
    29   *
    30   */
    31  final class SwitchableInputStream extends FilterInputStream {
    32
    33      /**
    34       * Creates a new instance without initializing the reference to the
    35       * underlying stream.
    36       */
    37      SwitchableInputStream() {
    38          super(null);
    39      }
    40
    41      /**
    42       * Creates a new instance with the initial reference to the underlying
    43       * stream.
    44       */
    45      void switchStream(InputStream in) {
    46          this.in = in;
    47      }
    48  }