| /* |
| * 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.druid.query.groupby.epinephelinae; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.primitives.Ints; |
| import org.apache.druid.query.aggregation.AggregatorFactory; |
| |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| |
| public class IntKeySerde implements Grouper.KeySerde<Integer> |
| { |
| public static final Grouper.KeySerde<Integer> INSTANCE = new IntKeySerde(); |
| |
| private IntKeySerde() |
| { |
| // No instantiation |
| } |
| |
| private static final Grouper.BufferComparator KEY_COMPARATOR = new Grouper.BufferComparator() |
| { |
| @Override |
| public int compare(ByteBuffer lhsBuffer, ByteBuffer rhsBuffer, int lhsPosition, int rhsPosition) |
| { |
| return Ints.compare(lhsBuffer.getInt(lhsPosition), rhsBuffer.getInt(rhsPosition)); |
| } |
| }; |
| |
| private final ByteBuffer buf = ByteBuffer.allocate(Integer.BYTES); |
| |
| @Override |
| public int keySize() |
| { |
| return Integer.BYTES; |
| } |
| |
| @Override |
| public Class<Integer> keyClazz() |
| { |
| return Integer.class; |
| } |
| |
| @Override |
| public List<String> getDictionary() |
| { |
| return ImmutableList.of(); |
| } |
| |
| @Override |
| public ByteBuffer toByteBuffer(Integer key) |
| { |
| buf.putInt(0, key); |
| buf.position(0); |
| return buf; |
| } |
| |
| @Override |
| public Integer fromByteBuffer(ByteBuffer buffer, int position) |
| { |
| return buffer.getInt(position); |
| } |
| |
| @Override |
| public Grouper.BufferComparator bufferComparator() |
| { |
| return KEY_COMPARATOR; |
| } |
| |
| @Override |
| public Grouper.BufferComparator bufferComparatorWithAggregators( |
| AggregatorFactory[] aggregatorFactories, |
| int[] aggregatorOffsets |
| ) |
| { |
| return KEY_COMPARATOR; |
| } |
| |
| @Override |
| public void reset() |
| { |
| // Nothing to do |
| } |
| } |