com.metamx.druid.index.v1.CompressedLongBufferObjectStrategy.java Source code

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Here is the source code for com.metamx.druid.index.v1.CompressedLongBufferObjectStrategy.java

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/*
 * Druid - a distributed column store.
 * Copyright (C) 2012  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 com.metamx.druid.index.v1;

import com.google.common.collect.Ordering;
import com.google.common.primitives.Longs;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.LongBuffer;

/**
*/
public class CompressedLongBufferObjectStrategy extends CompressedObjectStrategy<LongBuffer> {
    public static CompressedLongBufferObjectStrategy getBufferForOrder(ByteOrder order) {
        return new CompressedLongBufferObjectStrategy(order);
    }

    private CompressedLongBufferObjectStrategy(final ByteOrder order) {
        super(order, new BufferConverter<LongBuffer>() {
            @Override
            public LongBuffer convert(ByteBuffer buf) {
                return buf.asLongBuffer();
            }

            @Override
            public int compare(LongBuffer lhs, LongBuffer rhs) {
                return Ordering.natural().nullsFirst().compare(lhs, rhs);
            }

            @Override
            public int sizeOf(int count) {
                return count * Longs.BYTES;
            }

            @Override
            public LongBuffer combine(ByteBuffer into, LongBuffer from) {
                return into.asLongBuffer().put(from);
            }
        });
    }

}