| /* |
| * 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 javax.annotation.Nullable; |
| import java.nio.ByteBuffer; |
| |
| public class CountVectorAggregator implements VectorAggregator |
| { |
| @Override |
| public void init(final ByteBuffer buf, final int position) |
| { |
| buf.putLong(position, 0); |
| } |
| |
| @Override |
| public void aggregate(final ByteBuffer buf, final int position, final int startRow, final int endRow) |
| { |
| final int delta = endRow - startRow; |
| buf.putLong(position, buf.getLong(position) + delta); |
| } |
| |
| @Override |
| public void aggregate( |
| final ByteBuffer buf, |
| final int numRows, |
| final int[] positions, |
| @Nullable final int[] rows, |
| final int positionOffset |
| ) |
| { |
| for (int i = 0; i < numRows; i++) { |
| final int position = positions[i] + positionOffset; |
| buf.putLong(position, buf.getLong(position) + 1); |
| } |
| } |
| |
| @Override |
| public Object get(final ByteBuffer buf, final int position) |
| { |
| return buf.getLong(position); |
| } |
| |
| @Override |
| public void close() |
| { |
| // Nothing to close. |
| } |
| } |