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/* * @(#)FilterReader.java 1.19 05/11/17 * * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ 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. * * @version 1.19, 05/11/17 * @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(); } }