| /* |
| * 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(); |
| } |
| |
| } |