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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
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package org.apache.cassandra.io.sstable;

import java.io.ByteArrayOutputStream;
import java.io.ByteArrayInputStream;
import java.io.DataOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

import org.junit.Test;

import org.apache.cassandra.db.commitlog.ReplayPosition;
import org.apache.cassandra.db.marshal.BytesType;
import org.apache.cassandra.dht.RandomPartitioner;
import org.apache.cassandra.utils.EstimatedHistogram;
import org.apache.cassandra.utils.Pair;

public class SSTableMetadataSerializerTest
{
    @Test
    public void testSerialization() throws IOException
    {
        EstimatedHistogram rowSizes = new EstimatedHistogram(
            new long[] { 1L, 2L },
            new long[] { 3L, 4L, 5L });
        EstimatedHistogram columnCounts = new EstimatedHistogram(
            new long[] { 6L, 7L },
            new long[] { 8L, 9L, 10L });
        ReplayPosition rp = new ReplayPosition(11L, 12);
        long minTimestamp = 2162517136L;
        long maxTimestamp = 4162517136L;

        SSTableMetadata.Collector collector = SSTableMetadata.createCollector(BytesType.instance)
                                                             .estimatedRowSize(rowSizes)
                                                             .estimatedColumnCount(columnCounts)
                                                             .replayPosition(rp);
        collector.updateMinTimestamp(minTimestamp);
        collector.updateMaxTimestamp(maxTimestamp);
        SSTableMetadata originalMetadata = collector.finalizeMetadata(RandomPartitioner.class.getCanonicalName(), 0.1);

        ByteArrayOutputStream byteOutput = new ByteArrayOutputStream();
        DataOutputStream out = new DataOutputStream(byteOutput);
        
        Set<Integer> ancestors = new HashSet<Integer>();
        ancestors.addAll(Arrays.asList(1,2,3,4));

        SSTableMetadata.serializer.serialize(originalMetadata, ancestors, out);

        ByteArrayInputStream byteInput = new ByteArrayInputStream(byteOutput.toByteArray());
        DataInputStream in = new DataInputStream(byteInput);
        Descriptor desc = new Descriptor(Descriptor.Version.CURRENT, new File("."), "", "", 0, false);
        Pair<SSTableMetadata, Set<Integer>> statsPair = SSTableMetadata.serializer.deserialize(in, desc);
        SSTableMetadata stats = statsPair.left;

        assert stats.estimatedRowSize.equals(originalMetadata.estimatedRowSize);
        assert stats.estimatedRowSize.equals(rowSizes);
        assert stats.estimatedColumnCount.equals(originalMetadata.estimatedColumnCount);
        assert stats.estimatedColumnCount.equals(columnCounts);
        assert stats.replayPosition.equals(originalMetadata.replayPosition);
        assert stats.replayPosition.equals(rp);
        assert stats.minTimestamp == minTimestamp;
        assert stats.maxTimestamp == maxTimestamp;
        assert stats.minTimestamp == originalMetadata.minTimestamp;
        assert stats.maxTimestamp == originalMetadata.maxTimestamp;
        assert stats.bloomFilterFPChance == originalMetadata.bloomFilterFPChance;
        assert RandomPartitioner.class.getCanonicalName().equals(stats.partitioner);
        assert ancestors.equals(statsPair.right);
    }
}