/*
* 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.
*/
package org.apache.cassandra.db;
import java.io.*;
import java.security.MessageDigest;
import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.db.composites.CellName;
import org.apache.cassandra.db.composites.CellNameType;
import org.apache.cassandra.db.composites.Composite;
import org.apache.cassandra.io.ISSTableSerializer;
import org.apache.cassandra.io.sstable.Descriptor;
import org.apache.cassandra.serializers.MarshalException;
public interface OnDiskAtom
{
public Composite name();
/**
* For a standard column, this is the same as timestamp().
* For a super column, this is the min/max column timestamp of the sub columns.
*/
public long minTimestamp();
public long maxTimestamp();
public int getLocalDeletionTime(); // for tombstone GC, so int is sufficient granularity
public void validateFields(CFMetaData metadata) throws MarshalException;
public void updateDigest(MessageDigest digest);
public static class Serializer implements ISSTableSerializer<OnDiskAtom>
{
private final CellNameType type;
public Serializer(CellNameType type)
{
this.type = type;
}
public void serializeForSSTable(OnDiskAtom atom, DataOutput out) throws IOException
{
if (atom instanceof Cell)
{
type.columnSerializer().serialize((Cell)atom, out);
}
else
{
assert atom instanceof RangeTombstone;
type.rangeTombstoneSerializer().serializeForSSTable((RangeTombstone)atom, out);
}
}
public OnDiskAtom deserializeFromSSTable(DataInput in, Descriptor.Version version) throws IOException
{
return deserializeFromSSTable(in, ColumnSerializer.Flag.LOCAL, Integer.MIN_VALUE, version);
}
public OnDiskAtom deserializeFromSSTable(DataInput in, ColumnSerializer.Flag flag, int expireBefore, Descriptor.Version version) throws IOException
{
Composite name = type.serializer().deserialize(in);
if (name.isEmpty())
{
// SSTableWriter.END_OF_ROW
return null;
}
int b = in.readUnsignedByte();
if ((b & ColumnSerializer.RANGE_TOMBSTONE_MASK) != 0)
return type.rangeTombstoneSerializer().deserializeBody(in, name, version);
else
return type.columnSerializer().deserializeColumnBody(in, (CellName)name, b, flag, expireBefore);
}
public long serializedSizeForSSTable(OnDiskAtom atom)
{
if (atom instanceof Cell)
{
return type.columnSerializer().serializedSize((Cell)atom, TypeSizes.NATIVE);
}
else
{
assert atom instanceof RangeTombstone;
return type.rangeTombstoneSerializer().serializedSizeForSSTable((RangeTombstone)atom);
}
}
}
}