| /* |
| * 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.phoenix.expression.aggregator; |
| |
| import java.util.List; |
| |
| import org.apache.phoenix.expression.function.SingleAggregateFunction; |
| import org.apache.phoenix.schema.ValueBitSet; |
| import org.apache.phoenix.schema.tuple.Tuple; |
| import org.apache.phoenix.util.TupleUtil; |
| |
| |
| |
| /** |
| * |
| * Aggregators that execute on the client-side |
| * |
| * |
| * @since 0.1 |
| */ |
| public class ClientAggregators extends Aggregators { |
| private final ValueBitSet tempValueSet; |
| |
| private static Aggregator[] getAggregators(List<SingleAggregateFunction> aggFuncs) { |
| Aggregator[] aggregators = new Aggregator[aggFuncs.size()]; |
| for (int i = 0; i < aggregators.length; i++) { |
| aggregators[i] = aggFuncs.get(i).getAggregator(); |
| } |
| return aggregators; |
| } |
| |
| public ClientAggregators(List<SingleAggregateFunction> functions, int minNullableIndex) { |
| super(functions.toArray(new SingleAggregateFunction[functions.size()]), getAggregators(functions), minNullableIndex); |
| this.tempValueSet = ValueBitSet.newInstance(schema); |
| } |
| |
| @Override |
| public void aggregate(Aggregator[] aggregators, Tuple result) { |
| TupleUtil.getAggregateValue(result, ptr); |
| tempValueSet.clear(); |
| tempValueSet.or(ptr); |
| |
| int i = 0, maxOffset = ptr.getOffset() + ptr.getLength(); |
| Boolean hasValue; |
| schema.iterator(ptr); |
| while ((hasValue=schema.next(ptr, i, maxOffset, tempValueSet)) != null) { |
| if (hasValue) { |
| aggregators[i].aggregate(result, ptr); |
| } |
| i++; |
| } |
| } |
| |
| @Override |
| public Aggregator[] newAggregators() { |
| Aggregator[] aggregators = new Aggregator[functions.length]; |
| for (int i = 0; i < functions.length; i++) { |
| aggregators[i] = functions[i].newClientAggregator(); |
| } |
| return aggregators; |
| } |
| |
| } |