/*

  * 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.apache.commons.io.input;

 import java.io.InputStream;

 /**

  * Closed input stream. This stream returns -1 to all attempts to read

  * something from the stream.

  * <p>

  * Typically uses of this class include testing for corner cases in methods

  * that accept input streams and acting as a sentinel value instead of a

  * {@code null} input stream.

  *

  * @version $Id: ClosedInputStream.java 1471767 2013-04-24 23:24:19Z sebb $

  * @since 1.4

  */

 public class ClosedInputStream extends InputStream {

     /**

      * A singleton.

      */

     public static final ClosedInputStream CLOSED_INPUT_STREAM = new ClosedInputStream();

     /**

      * Returns -1 to indicate that the stream is closed.

      *

      * @return always -1

      */

     @Override

     public int read() {

         return -1;

     }

 }