package org.apache.cassandra.io;
/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 */

import java.io.DataInput;
import java.io.IOException;

import org.apache.cassandra.db.IColumn;

public interface IColumnSerializer extends ISerializer<IColumn>
{
    /**
     * Flag affecting deserialization behavior.
     *  - LOCAL: for deserialization of local data (Expired columns are
     *      converted to tombstones (to gain disk space)).
     *  - FROM_REMOTE: for deserialization of data received from remote hosts
     *      (Expired columns are converted to tombstone and counters have
     *      their delta cleared)
     *  - PRESERVE_SIZE: used when no transformation must be performed, i.e,
     *      when we must ensure that deserializing and reserializing the
     *      result yield the exact same bytes. Streaming uses this.
     */
    public static enum Flag
    {
        LOCAL, FROM_REMOTE, PRESERVE_SIZE;
    }

    public IColumn deserialize(DataInput in, Flag flag, int expireBefore) throws IOException;
}
