LegacyBloomFilterSerializer.java

package org.apache.cassandra.utils;
/*
 * 
 * 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.util.BitSet;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import org.apache.cassandra.utils.obs.OpenBitSet;
import org.apache.cassandra.io.ICompactSerializer;

class LegacyBloomFilterSerializer implements ICompactSerializer<LegacyBloomFilter>
{
    public void serialize(LegacyBloomFilter bf, DataOutputStream dos)
            throws IOException
    {
        dos.writeInt(bf.getHashCount());
        ObjectOutputStream oos = new ObjectOutputStream(dos);
        oos.writeObject(bf.getBitSet());
        oos.flush();
    }

    public LegacyBloomFilter deserialize(DataInputStream dis) throws IOException
    {
        int hashes = dis.readInt();
        ObjectInputStream ois = new ObjectInputStream(dis);
        try
        {
          BitSet bs = (BitSet) ois.readObject();
          return new LegacyBloomFilter(hashes, bs);
        } catch (ClassNotFoundException e)
        {
          throw new RuntimeException(e);
        }
    }
}