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/*
 * Druid - a distributed column store.
 * Copyright (C) 2014  Metamarkets Group Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package io.druid.client;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Throwables;
import com.google.common.collect.Lists;
import io.druid.client.cache.Cache;
import io.druid.query.SegmentDescriptor;
import org.joda.time.Interval;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.List;

public class CacheUtil
{
  public static Cache.NamedKey computeSegmentCacheKey(
      String segmentIdentifier,
      SegmentDescriptor descriptor,
      byte[] queryCacheKey
  )
  {
    final Interval segmentQueryInterval = descriptor.getInterval();
    final byte[] versionBytes = descriptor.getVersion().getBytes();

    return new Cache.NamedKey(
        segmentIdentifier, ByteBuffer
        .allocate(16 + versionBytes.length + 4 + queryCacheKey.length)
        .putLong(segmentQueryInterval.getStartMillis())
        .putLong(segmentQueryInterval.getEndMillis())
        .put(versionBytes)
        .putInt(descriptor.getPartitionNumber())
        .put(queryCacheKey).array()
    );
  }

  public static void populate(Cache cache, ObjectMapper mapper, Cache.NamedKey key, Iterable