151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/* 251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Copyright (c) 1996, 2005, Oracle and/or its affiliates. All rights reserved. 351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is free software; you can redistribute it and/or modify it 651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * under the terms of the GNU General Public License version 2 only, as 751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * published by the Free Software Foundation. Oracle designates this 851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * particular file as subject to the "Classpath" exception as provided 951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * by Oracle in the LICENSE file that accompanied this code. 1051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is distributed in the hope that it will be useful, but WITHOUT 1251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * version 2 for more details (a copy is included in the LICENSE file that 1551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * accompanied this code). 1651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * You should have received a copy of the GNU General Public License version 1851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2 along with this work; if not, write to the Free Software Foundation, 1951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * or visit www.oracle.com if you need additional information or have any 2351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * questions. 2451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 2551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskipackage java.io; 2751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/** 2951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This class implements a character buffer that can be used as a 3051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * character-input stream. 3151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 3251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @author Herb Jellinek 3351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @since JDK1.1 3451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 3551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskipublic class CharArrayReader extends Reader { 3651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** The character buffer. */ 3751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski protected char buf[]; 3851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** The current buffer position. */ 4051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski protected int pos; 4151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 4251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** The position of mark in buffer. */ 4351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski protected int markedPos = 0; 4451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 4551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 4651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * The index of the end of this buffer. There is not valid 4751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * data at or beyond this index. 4851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 4951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski protected int count; 5051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 5151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 5251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Creates a CharArrayReader from the specified array of chars. 5351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param buf Input buffer (not copied) 5451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 5551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public CharArrayReader(char buf[]) { 5651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski this.buf = buf; 5751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski this.pos = 0; 5851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski this.count = buf.length; 5951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 6051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 6251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Creates a CharArrayReader from the specified array of chars. 6351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 6451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <p> The resulting reader will start reading at the given 6551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <tt>offset</tt>. The total number of <tt>char</tt> values that can be 6651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * read from this reader will be either <tt>length</tt> or 6751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <tt>buf.length-offset</tt>, whichever is smaller. 6851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 6951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @throws IllegalArgumentException 7051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * If <tt>offset</tt> is negative or greater than 7151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <tt>buf.length</tt>, or if <tt>length</tt> is negative, or if 7251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * the sum of these two values is negative. 7351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 7451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param buf Input buffer (not copied) 7551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param offset Offset of the first char to read 7651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param length Number of chars to read 7751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 7851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public CharArrayReader(char buf[], int offset, int length) { 7951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if ((offset < 0) || (offset > buf.length) || (length < 0) || 8051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski ((offset + length) < 0)) { 8151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throw new IllegalArgumentException(); 8251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 8351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski this.buf = buf; 8451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski this.pos = offset; 8551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski this.count = Math.min(offset + length, buf.length); 8651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski this.markedPos = offset; 8751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 8851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 8951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** Checks to make sure that the stream has not been closed */ 9051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski private void ensureOpen() throws IOException { 9151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (buf == null) 9251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throw new IOException("Stream closed"); 9351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 9451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 9551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 9651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Reads a single character. 9751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 9851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @exception IOException If an I/O error occurs 9951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 10051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public int read() throws IOException { 10151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski synchronized (lock) { 10251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski ensureOpen(); 10351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (pos >= count) 10451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return -1; 10551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski else 10651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return buf[pos++]; 10751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 10851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 10951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 11051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 11151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Reads characters into a portion of an array. 11251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param b Destination buffer 11351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param off Offset at which to start storing characters 11451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param len Maximum number of characters to read 11551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @return The actual number of characters read, or -1 if 11651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * the end of the stream has been reached 11751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 11851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @exception IOException If an I/O error occurs 11951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 12051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public int read(char b[], int off, int len) throws IOException { 12151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski synchronized (lock) { 12251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski ensureOpen(); 12351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if ((off < 0) || (off > b.length) || (len < 0) || 12451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski ((off + len) > b.length) || ((off + len) < 0)) { 12551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski throw new IndexOutOfBoundsException(); 12651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } else if (len == 0) { 12751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return 0; 12851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 12951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 13051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (pos >= count) { 13151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return -1; 13251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 133a810284b165943041afbbd4e920b8997ae88fdefPrzemyslaw Szczepaniak 134a810284b165943041afbbd4e920b8997ae88fdefPrzemyslaw Szczepaniak int avail = count - pos; 135a810284b165943041afbbd4e920b8997ae88fdefPrzemyslaw Szczepaniak if (len > avail) { 136a810284b165943041afbbd4e920b8997ae88fdefPrzemyslaw Szczepaniak len = avail; 13751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 13851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (len <= 0) { 13951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return 0; 14051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 14151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski System.arraycopy(buf, pos, b, off, len); 14251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski pos += len; 14351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return len; 14451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 14551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 14651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 14751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 14851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Skips characters. Returns the number of characters that were skipped. 14951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 15051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <p>The <code>n</code> parameter may be negative, even though the 15151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <code>skip</code> method of the {@link Reader} superclass throws 15251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * an exception in this case. If <code>n</code> is negative, then 15351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * this method does nothing and returns <code>0</code>. 15451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 15551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param n The number of characters to skip 15651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @return The number of characters actually skipped 15751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @exception IOException If the stream is closed, or an I/O error occurs 15851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 15951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public long skip(long n) throws IOException { 16051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski synchronized (lock) { 16151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski ensureOpen(); 162a810284b165943041afbbd4e920b8997ae88fdefPrzemyslaw Szczepaniak 163a810284b165943041afbbd4e920b8997ae88fdefPrzemyslaw Szczepaniak long avail = count - pos; 164a810284b165943041afbbd4e920b8997ae88fdefPrzemyslaw Szczepaniak if (n > avail) { 165a810284b165943041afbbd4e920b8997ae88fdefPrzemyslaw Szczepaniak n = avail; 16651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 16751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (n < 0) { 16851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return 0; 16951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 17051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski pos += n; 17151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return n; 17251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 17351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 17451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 17551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 17651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Tells whether this stream is ready to be read. Character-array readers 17751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * are always ready to be read. 17851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 17951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @exception IOException If an I/O error occurs 18051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 18151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public boolean ready() throws IOException { 18251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski synchronized (lock) { 18351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski ensureOpen(); 18451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return (count - pos) > 0; 18551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 18651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 18751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 18851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 18951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Tells whether this stream supports the mark() operation, which it does. 19051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 19151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public boolean markSupported() { 19251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return true; 19351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 19451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 19551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 19651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Marks the present position in the stream. Subsequent calls to reset() 19751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * will reposition the stream to this point. 19851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 19951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param readAheadLimit Limit on the number of characters that may be 20051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * read while still preserving the mark. Because 20151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * the stream's input comes from a character array, 20251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * there is no actual limit; hence this argument is 20351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * ignored. 20451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 20551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @exception IOException If an I/O error occurs 20651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 20751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public void mark(int readAheadLimit) throws IOException { 20851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski synchronized (lock) { 20951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski ensureOpen(); 21051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski markedPos = pos; 21151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 21251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 21351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 21451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 21551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Resets the stream to the most recent mark, or to the beginning if it has 21651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * never been marked. 21751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 21851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @exception IOException If an I/O error occurs 21951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 22051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public void reset() throws IOException { 22151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski synchronized (lock) { 22251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski ensureOpen(); 22351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski pos = markedPos; 22451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 22551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 22651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 22751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 22851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Closes the stream and releases any system resources associated with 22951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * it. Once the stream has been closed, further read(), ready(), 23051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * mark(), reset(), or skip() invocations will throw an IOException. 23151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Closing a previously closed stream has no effect. 23251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 23351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public void close() { 23451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski buf = null; 23551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 23651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 237