/*

  * Copyright (c) 1996, 2005, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 package java.io;

 /**

  * Abstract class for reading filtered character streams.

  * The abstract class <code>FilterReader</code> itself

  * provides default methods that pass all requests to

  * the contained stream. Subclasses of <code>FilterReader</code>

  * should override some of these methods and may also provide

  * additional methods and fields.

  *

  * @author      Mark Reinhold

  * @since       JDK1.1

  */

 public abstract class FilterReader extends Reader {

     /**

      * The underlying character-input stream.

      */

     protected Reader in;

     /**

      * Creates a new filtered reader.

      *

      * @param in  a Reader object providing the underlying stream.

      * @throws NullPointerException if <code>in</code> is <code>null</code>

      */

     protected FilterReader(Reader in) {

         super(in);

         this.in = in;

     }

     /**

      * Reads a single character.

      *

      * @exception  IOException  If an I/O error occurs

      */

     public int read() throws IOException {

         return in.read();

     }

     /**

      * Reads characters into a portion of an array.

      *

      * @exception  IOException  If an I/O error occurs

      */

     public int read(char cbuf[], int off, int len) throws IOException {

         return in.read(cbuf, off, len);

     }

     /**

      * Skips characters.

      *

      * @exception  IOException  If an I/O error occurs

      */

     public long skip(long n) throws IOException {

         return in.skip(n);

     }

     /**

      * Tells whether this stream is ready to be read.

      *

      * @exception  IOException  If an I/O error occurs

      */

     public boolean ready() throws IOException {

         return in.ready();

     }

     /**

      * Tells whether this stream supports the mark() operation.

      */

     public boolean markSupported() {

         return in.markSupported();

     }

     /**

      * Marks the present position in the stream.

      *

      * @exception  IOException  If an I/O error occurs

      */

     public void mark(int readAheadLimit) throws IOException {

         in.mark(readAheadLimit);

     }

     /**

      * Resets the stream.

      *

      * @exception  IOException  If an I/O error occurs

      */

     public void reset() throws IOException {

         in.reset();

     }

     public void close() throws IOException {

         in.close();

     }

 }