| /* |
| * Copyright (c) 1997, 2008, 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. |
| */ |
| |
| |
| /* |
| * The Original Code is HAT. The Initial Developer of the |
| * Original Code is Bill Foote, with contributions from others |
| * at JavaSoft/Sun. |
| */ |
| |
| package com.sun.tools.hat.internal.parser; |
| |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| |
| /** |
| * Implementation of ReadBuffer using a RandomAccessFile |
| * |
| * @author A. Sundararajan |
| */ |
| class FileReadBuffer implements ReadBuffer { |
| // underlying file to read |
| private RandomAccessFile file; |
| |
| FileReadBuffer(RandomAccessFile file) { |
| this.file = file; |
| } |
| |
| private void seek(long pos) throws IOException { |
| file.getChannel().position(pos); |
| } |
| |
| public synchronized void get(long pos, byte[] buf) throws IOException { |
| seek(pos); |
| file.read(buf); |
| } |
| |
| public synchronized char getChar(long pos) throws IOException { |
| seek(pos); |
| return file.readChar(); |
| } |
| |
| public synchronized byte getByte(long pos) throws IOException { |
| seek(pos); |
| return (byte) file.read(); |
| } |
| |
| public synchronized short getShort(long pos) throws IOException { |
| seek(pos); |
| return file.readShort(); |
| } |
| |
| public synchronized int getInt(long pos) throws IOException { |
| seek(pos); |
| return file.readInt(); |
| } |
| |
| public synchronized long getLong(long pos) throws IOException { |
| seek(pos); |
| return file.readLong(); |
| } |
| } |