/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project 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.jboss.netty.handler.codec.serialization;

import java.io.FilterInputStream;
import java.io.InputStream;

/**
 * {@link FilterInputStream} which allows a user to change the underlying
 * stream at any time.
 */
final class SwitchableInputStream extends FilterInputStream {

    /**
     * Creates a new instance without initializing the reference to the
     * underlying stream.
     */
    SwitchableInputStream() {
        super(null);
    }

    /**
     * Creates a new instance with the initial reference to the underlying
     * stream.
     */
    void switchStream(InputStream in) {
        this.in = in;
    }
}
