cassandra-trunk/src/java/org/apache/cassandra/schema/SchemaMutationsSerializer.java
/*
 * 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.schema;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;

import org.apache.cassandra.db.Mutation;
import org.apache.cassandra.db.TypeSizes;
import org.apache.cassandra.io.IVersionedSerializer;
import org.apache.cassandra.io.util.DataInputPlus;
import org.apache.cassandra.io.util.DataOutputPlus;

public class SchemaMutationsSerializer implements IVersionedSerializer<Collection<Mutation>>
{
    public static final SchemaMutationsSerializer instance = new SchemaMutationsSerializer();

    public void serialize(Collection<Mutation> schema, DataOutputPlus out, int version) throws IOException
    {
        out.writeInt(schema.size());
        for (Mutation mutation : schema)
            Mutation.serializer.serialize(mutation, out, version);
    }

    public Collection<Mutation> deserialize(DataInputPlus in, int version) throws IOException
    {
        int count = in.readInt();
        Collection<Mutation> schema = new ArrayList<>(count);

        for (int i = 0; i < count; i++)
            schema.add(Mutation.serializer.deserialize(in, version));

        return schema;
    }

    public long serializedSize(Collection<Mutation> schema, int version)
    {
        int size = TypeSizes.sizeof(schema.size());
        for (Mutation mutation : schema)
            size += mutation.serializedSize(version);
        return size;
    }
}
