/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.kernel.impl.transaction.log.entry.v42;

import java.io.IOException;
import org.neo4j.io.fs.ReadableChannel;
import org.neo4j.io.fs.WritableChannel;
import org.neo4j.kernel.KernelVersion;
import org.neo4j.kernel.impl.transaction.log.LogPositionMarker;
import org.neo4j.kernel.impl.transaction.log.entry.LogEntryCommand;
import org.neo4j.kernel.impl.transaction.log.entry.LogEntrySerializer;
import org.neo4j.kernel.impl.transaction.log.entry.LogEntryTypeCodes;
import org.neo4j.storageengine.api.CommandReaderFactory;
import org.neo4j.storageengine.api.StorageCommand;

public class CommandLogEntrySerializerV4_2 extends LogEntrySerializer<LogEntryCommand> {
    public CommandLogEntrySerializerV4_2() {
        super(LogEntryTypeCodes.COMMAND);
    }

    @Override
    public LogEntryCommand parse(
            KernelVersion version,
            ReadableChannel channel,
            LogPositionMarker marker,
            CommandReaderFactory commandReaderFactory)
            throws IOException {
        StorageCommand command = commandReaderFactory.get(version).read(channel);
        return command == null ? null : new LogEntryCommand(command);
    }

    @Override
    public int write(WritableChannel channel, LogEntryCommand logEntry) throws IOException {
        throw new UnsupportedOperationException("Use specialized writer for storage commands.");
    }
}
