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RandomAccessByteStream.java
Package: src.rar [view]
Upload User: gwt600
Upload Date: 2021-06-03
Package Size: 704k
Code Size: 3k
Category:
Games
Development Platform:
Java
- /*
- This file is part of the OdinMS Maple Story Server
- Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
- Matthias Butz <matze@odinms.de>
- Jan Christian Meyer <vimes@odinms.de>
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU Affero General Public License version 3
- as published by the Free Software Foundation. You may not use, modify
- or distribute this program under any other version of the
- GNU Affero General Public License.
- This program 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 Affero General Public License for more details.
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- package net.sf.odinms.tools.data.input;
- import java.io.IOException;
- import java.io.RandomAccessFile;
- import org.slf4j.Logger;
- import org.slf4j.LoggerFactory;
- /**
- * Provides an abstract layer to a byte stream. This layer can be accessed
- * randomly.
- *
- * @author Frz
- * @version 1.0
- * @since Revision 323
- */
- public class RandomAccessByteStream implements SeekableInputStreamBytestream {
- private RandomAccessFile raf;
- private long read = 0;
- private static Logger log = LoggerFactory
- .getLogger(RandomAccessByteStream.class);
- /**
- * Class constructor. Wraps this object around a RandomAccessFile.
- *
- * @param raf
- * The RandomAccessFile instance to wrap this around.
- * @see java.io.RandomAccessFile
- */
- public RandomAccessByteStream(RandomAccessFile raf) {
- super();
- this.raf = raf;
- }
- /**
- * Reads a byte off of the file.
- *
- * @return The byte read as an integer.
- */
- @Override
- public int readByte() {
- int temp;
- try {
- temp = raf.read();
- if (temp == -1)
- throw new RuntimeException("EOF");
- read++;
- return temp;
- } catch (IOException e) {
- throw new RuntimeException(e);
- }
- }
- /**
- * @see net.sf.odinms.tools.data.input.SeekableInputStreamBytestream#seek(long)
- */
- @Override
- public void seek(long offset) throws IOException {
- raf.seek(offset);
- }
- /**
- * @see net.sf.odinms.tools.data.input.SeekableInputStreamBytestream#getPosition()
- */
- @Override
- public long getPosition() throws IOException {
- return raf.getFilePointer();
- }
- /**
- * Get the number of bytes read.
- *
- * @return The number of bytes read as a long integer.
- */
- @Override
- public long getBytesRead() {
- return read;
- }
- /**
- * Get the number of bytes available for reading.
- *
- * @return The number of bytes available for reading as a long integer.
- */
- @Override
- public long available() {
- try {
- return raf.length() - raf.getFilePointer();
- } catch (IOException e) {
- log.error("ERROR", e);
- return 0;
- }
- }
- }