blob: d3c08b53cbed18addec77a60b7be1b5f84b7df54 [file] [log] [blame]
/*
* 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.utils;
import java.io.DataInputStream;
import java.io.IOException;
import org.apache.cassandra.db.TypeSizes;
import org.apache.cassandra.io.util.DataOutputPlus;
import org.apache.cassandra.utils.obs.IBitSet;
import org.apache.cassandra.utils.obs.OffHeapBitSet;
public final class BloomFilterSerializer
{
private BloomFilterSerializer()
{
}
public static void serialize(BloomFilter bf, DataOutputPlus out) throws IOException
{
out.writeInt(bf.hashCount);
bf.bitset.serialize(out);
}
@SuppressWarnings("resource")
public static BloomFilter deserialize(DataInputStream in, boolean oldBfFormat) throws IOException
{
int hashes = in.readInt();
IBitSet bs = OffHeapBitSet.deserialize(in, oldBfFormat);
return new BloomFilter(hashes, bs);
}
/**
* Calculates a serialized size of the given Bloom Filter
* @param bf Bloom filter to calculate serialized size
* @see org.apache.cassandra.io.ISerializer#serialize(Object, org.apache.cassandra.io.util.DataOutputPlus)
*
* @return serialized size of the given bloom filter
*/
public static long serializedSize(BloomFilter bf)
{
int size = TypeSizes.sizeof(bf.hashCount); // hash count
size += bf.bitset.serializedSize();
return size;
}
}