| /* |
| * 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.aggregation; |
| |
| import org.apache.druid.query.monomorphicprocessing.CalledFromHotLoop; |
| import org.apache.druid.query.monomorphicprocessing.RuntimeShapeInspector; |
| import org.apache.druid.segment.BaseDoubleColumnValueSelector; |
| |
| import java.nio.ByteBuffer; |
| |
| public abstract class SimpleDoubleBufferAggregator implements BufferAggregator |
| { |
| final BaseDoubleColumnValueSelector selector; |
| |
| public SimpleDoubleBufferAggregator(BaseDoubleColumnValueSelector selector) |
| { |
| this.selector = selector; |
| } |
| |
| public BaseDoubleColumnValueSelector getSelector() |
| { |
| return selector; |
| } |
| |
| /** |
| * Faster equivalent to |
| * aggregator.init(buf, position); |
| * aggregator.aggregate(buf, position, value); |
| */ |
| @CalledFromHotLoop |
| public abstract void putFirst(ByteBuffer buf, int position, double value); |
| |
| @CalledFromHotLoop |
| public abstract void aggregate(ByteBuffer buf, int position, double value); |
| |
| @Override |
| public final void aggregate(ByteBuffer buf, int position) |
| { |
| aggregate(buf, position, selector.getDouble()); |
| } |
| |
| @Override |
| public final Object get(ByteBuffer buf, int position) |
| { |
| return buf.getDouble(position); |
| } |
| |
| @Override |
| public final float getFloat(ByteBuffer buf, int position) |
| { |
| return (float) buf.getDouble(position); |
| } |
| |
| @Override |
| public final long getLong(ByteBuffer buf, int position) |
| { |
| return (long) buf.getDouble(position); |
| } |
| |
| @Override |
| public double getDouble(ByteBuffer buffer, int position) |
| { |
| return buffer.getDouble(position); |
| } |
| |
| @Override |
| public void close() |
| { |
| // no resources to cleanup |
| } |
| |
| @Override |
| public void inspectRuntimeShape(RuntimeShapeInspector inspector) |
| { |
| inspector.visit("selector", selector); |
| } |
| } |