/* This file is part of VoltDB.
* Copyright (C) 2008-2017 VoltDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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 VoltDB. If not, see <http://www.gnu.org/licenses/>.
*/
package org.voltdb;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.ByteChannel;
import java.nio.channels.FileChannel;
public abstract class LogEntry {
/**
* Read a single log entry.
*
* @param in
* The input file channel
* @return The new log entry, or null if failed
* @throws IOException
* If there is any error reading the log entry
*/
public static LogEntry readExternal(ByteChannel in) throws IOException {
throw new UnsupportedOperationException();
}
public abstract void writeExternal(FileChannel out) throws IOException;
public abstract ByteBuffer getAsBuffer() throws IOException;
}