| /* |
| * 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.flink.api.java.summarize.aggregation; |
| |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.api.java.tuple.Tuple; |
| import org.apache.flink.api.java.typeutils.TupleTypeInfoBase; |
| import org.apache.flink.types.BooleanValue; |
| import org.apache.flink.types.DoubleValue; |
| import org.apache.flink.types.FloatValue; |
| import org.apache.flink.types.IntValue; |
| import org.apache.flink.types.LongValue; |
| import org.apache.flink.types.ShortValue; |
| import org.apache.flink.types.StringValue; |
| |
| /** Factory for creating Summary Aggregators. */ |
| @Internal |
| public class SummaryAggregatorFactory { |
| |
| @SuppressWarnings("unchecked") |
| public static <R extends Tuple> TupleSummaryAggregator<R> create(TupleTypeInfoBase<?> inType) { |
| Aggregator[] columnAggregators = new Aggregator[inType.getArity()]; |
| for (int field = 0; field < inType.getArity(); field++) { |
| Class clazz = inType.getTypeAt(field).getTypeClass(); |
| columnAggregators[field] = SummaryAggregatorFactory.create(clazz); |
| } |
| return new TupleSummaryAggregator<>(columnAggregators); |
| } |
| |
| /** |
| * Create a SummaryAggregator for the supplied type. |
| * |
| * @param <T> the type to aggregate |
| * @param <R> the result type of the aggregation |
| */ |
| @SuppressWarnings("unchecked") |
| public static <T, R> Aggregator<T, R> create(Class<T> type) { |
| if (type == Long.class) { |
| return (Aggregator<T, R>) new LongSummaryAggregator(); |
| } else if (type == LongValue.class) { |
| return (Aggregator<T, R>) new ValueSummaryAggregator.LongValueSummaryAggregator(); |
| } else if (type == Integer.class) { |
| return (Aggregator<T, R>) new IntegerSummaryAggregator(); |
| } else if (type == IntValue.class) { |
| return (Aggregator<T, R>) new ValueSummaryAggregator.IntegerValueSummaryAggregator(); |
| } else if (type == Double.class) { |
| return (Aggregator<T, R>) new DoubleSummaryAggregator(); |
| } else if (type == DoubleValue.class) { |
| return (Aggregator<T, R>) new ValueSummaryAggregator.DoubleValueSummaryAggregator(); |
| } else if (type == Float.class) { |
| return (Aggregator<T, R>) new FloatSummaryAggregator(); |
| } else if (type == FloatValue.class) { |
| return (Aggregator<T, R>) new ValueSummaryAggregator.FloatValueSummaryAggregator(); |
| } else if (type == Short.class) { |
| return (Aggregator<T, R>) new ShortSummaryAggregator(); |
| } else if (type == ShortValue.class) { |
| return (Aggregator<T, R>) new ValueSummaryAggregator.ShortValueSummaryAggregator(); |
| } else if (type == Boolean.class) { |
| return (Aggregator<T, R>) new BooleanSummaryAggregator(); |
| } else if (type == BooleanValue.class) { |
| return (Aggregator<T, R>) new ValueSummaryAggregator.BooleanValueSummaryAggregator(); |
| } else if (type == String.class) { |
| return (Aggregator<T, R>) new StringSummaryAggregator(); |
| } else if (type == StringValue.class) { |
| return (Aggregator<T, R>) new ValueSummaryAggregator.StringValueSummaryAggregator(); |
| } else { |
| // rather than error for unsupported types do something very generic |
| return (Aggregator<T, R>) new ObjectSummaryAggregator(); |
| } |
| } |
| } |