| /* |
| * 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.table.functions.aggfunctions |
| |
| import java.math.BigDecimal |
| |
| import org.apache.flink.api.common.typeinfo.BasicTypeInfo |
| |
| /** |
| * Base class for built-in Sum0 with retract aggregate function. |
| * If all values are null, 0 is returned. |
| * |
| * @tparam T the type for the aggregation result |
| */ |
| abstract class Sum0WithRetractAggFunction[T: Numeric] extends SumWithRetractAggFunction[T] { |
| |
| override def getValue(acc: SumWithRetractAccumulator[T]): T = { |
| if (acc.f1 > 0) { |
| acc.f0 |
| } else { |
| 0.asInstanceOf[T] |
| } |
| } |
| } |
| |
| /** |
| * Built-in Byte Sum0 with retract aggregate function |
| */ |
| class ByteSum0WithRetractAggFunction extends Sum0WithRetractAggFunction[Byte] { |
| override def getValueTypeInfo = BasicTypeInfo.BYTE_TYPE_INFO |
| } |
| |
| /** |
| * Built-in Short Sum0 with retract aggregate function |
| */ |
| class ShortSum0WithRetractAggFunction extends Sum0WithRetractAggFunction[Short] { |
| override def getValueTypeInfo = BasicTypeInfo.SHORT_TYPE_INFO |
| } |
| |
| /** |
| * Built-in Int Sum0 with retract aggregate function |
| */ |
| class IntSum0WithRetractAggFunction extends Sum0WithRetractAggFunction[Int] { |
| override def getValueTypeInfo = BasicTypeInfo.INT_TYPE_INFO |
| } |
| |
| /** |
| * Built-in Long Sum0 with retract aggregate function |
| */ |
| class LongSum0WithRetractAggFunction extends Sum0WithRetractAggFunction[Long] { |
| override def getValueTypeInfo = BasicTypeInfo.LONG_TYPE_INFO |
| } |
| |
| /** |
| * Built-in Float Sum0 with retract aggregate function |
| */ |
| class FloatSum0WithRetractAggFunction extends Sum0WithRetractAggFunction[Float] { |
| override def getValueTypeInfo = BasicTypeInfo.FLOAT_TYPE_INFO |
| } |
| |
| /** |
| * Built-in Double Sum0 with retract aggregate function |
| */ |
| class DoubleSum0WithRetractAggFunction extends Sum0WithRetractAggFunction[Double] { |
| override def getValueTypeInfo = BasicTypeInfo.DOUBLE_TYPE_INFO |
| } |
| |
| /** |
| * Built-in Big Decimal Sum0 with retract aggregate function |
| */ |
| class DecimalSum0WithRetractAggFunction extends DecimalSumWithRetractAggFunction { |
| |
| override def getValue(acc: DecimalSumWithRetractAccumulator): BigDecimal = { |
| if (acc.f1 > 0) { |
| acc.f0 |
| } else { |
| BigDecimal.ZERO |
| } |
| } |
| } |