LuciferYang commented on code in PR #40218: URL: https://github.com/apache/spark/pull/40218#discussion_r1125595959
########## connector/connect/client/jvm/src/main/scala/org/apache/spark/sql/expressions/LiteralProtoConverter.scala: ########## @@ -0,0 +1,157 @@ +/* + * 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.spark.sql.expressions + +import java.lang.{Boolean => JBoolean, Byte => JByte, Character => JChar, Double => JDouble, Float => JFloat, Integer => JInteger, Long => JLong, Short => JShort} +import java.math.{BigDecimal => JBigDecimal} +import java.sql.{Date, Timestamp} +import java.time._ + +import com.google.protobuf.ByteString + +import org.apache.spark.connect.proto +import org.apache.spark.sql.catalyst.util.{DateTimeUtils, IntervalUtils} +import org.apache.spark.sql.connect.client.unsupported +import org.apache.spark.sql.connect.common.DataTypeProtoConverter._ +import org.apache.spark.sql.types._ +import org.apache.spark.unsafe.types.CalendarInterval + +object LiteralProtoConverter { + + private lazy val nullType = + proto.DataType.newBuilder().setNull(proto.DataType.NULL.getDefaultInstance).build() + + /** + * Transforms literal value to the `proto.Expression.Literal.Builder`. + * + * @return + * proto.Expression.Literal.Builder + */ + @scala.annotation.tailrec + def toLiteralProtoBuilder(literal: Any): proto.Expression.Literal.Builder = { + val builder = proto.Expression.Literal.newBuilder() + + def decimalBuilder(precision: Int, scale: Int, value: String) = { + builder.getDecimalBuilder.setPrecision(precision).setScale(scale).setValue(value) + } + + def calendarIntervalBuilder(months: Int, days: Int, microseconds: Long) = { + builder.getCalendarIntervalBuilder + .setMonths(months) + .setDays(days) + .setMicroseconds(microseconds) + } + + def arrayBuilder(array: Array[_]) = { + val ab = builder.getArrayBuilder + .setElementType(componentTypeToProto(array.getClass.getComponentType)) + array.foreach(x => ab.addElement(toLiteralProto(x))) + ab + } + + literal match { + case v: Boolean => builder.setBoolean(v) + case v: Byte => builder.setByte(v) + case v: Short => builder.setShort(v) + case v: Int => builder.setInteger(v) + case v: Long => builder.setLong(v) + case v: Float => builder.setFloat(v) + case v: Double => builder.setDouble(v) + case v: BigDecimal => + builder.setDecimal(decimalBuilder(v.precision, v.scale, v.toString)) + case v: JBigDecimal => + builder.setDecimal(decimalBuilder(v.precision, v.scale, v.toString)) + case v: String => builder.setString(v) + case v: Char => builder.setString(v.toString) + case v: Array[Char] => builder.setString(String.valueOf(v)) + case v: Array[Byte] => builder.setBinary(ByteString.copyFrom(v)) + case v: collection.mutable.WrappedArray[_] => toLiteralProtoBuilder(v.array) + case v: LocalDate => builder.setDate(v.toEpochDay.toInt) + case v: Decimal => + builder.setDecimal(decimalBuilder(Math.max(v.precision, v.scale), v.scale, v.toString)) + case v: Instant => builder.setTimestamp(DateTimeUtils.instantToMicros(v)) + case v: Timestamp => builder.setTimestamp(DateTimeUtils.fromJavaTimestamp(v)) + case v: LocalDateTime => builder.setTimestampNtz(DateTimeUtils.localDateTimeToMicros(v)) + case v: Date => builder.setDate(DateTimeUtils.fromJavaDate(v)) + case v: Duration => builder.setDayTimeInterval(IntervalUtils.durationToMicros(v)) + case v: Period => builder.setYearMonthInterval(IntervalUtils.periodToMonths(v)) + case v: Array[_] => builder.setArray(arrayBuilder(v)) + case v: CalendarInterval => + builder.setCalendarInterval(calendarIntervalBuilder(v.months, v.days, v.microseconds)) + case null => builder.setNull(nullType) + case _ => unsupported(s"literal $literal not supported (yet).") + } + } + + /** + * Transforms literal value to the `proto.Expression.Literal`. + * + * @return + * proto.Expression.Literal + */ + def toLiteralProto(literal: Any): proto.Expression.Literal = + toLiteralProtoBuilder(literal).build() + + private def componentTypeToProto(clz: Class[_]): proto.DataType = clz match { + // primitive types + case JShort.TYPE => toConnectProtoType(ShortType) + case JInteger.TYPE => toConnectProtoType(IntegerType) + case JLong.TYPE => toConnectProtoType(LongType) + case JDouble.TYPE => toConnectProtoType(DoubleType) + case JByte.TYPE => toConnectProtoType(ByteType) + case JFloat.TYPE => toConnectProtoType(FloatType) + case JBoolean.TYPE => toConnectProtoType(BooleanType) + case JChar.TYPE => toConnectProtoType(StringType) + + // java classes + case _ if clz == classOf[LocalDate] || clz == classOf[Date] => + toConnectProtoType(DateType) + case _ if clz == classOf[Instant] || clz == classOf[Timestamp] => + toConnectProtoType(TimestampType) + case _ if clz == classOf[LocalDateTime] => toConnectProtoType(TimestampNTZType) + case _ if clz == classOf[Duration] => toConnectProtoType(DayTimeIntervalType.DEFAULT) + case _ if clz == classOf[Period] => toConnectProtoType(YearMonthIntervalType.DEFAULT) + case _ if clz == classOf[JBigDecimal] => toConnectProtoType(DecimalType.SYSTEM_DEFAULT) + case _ if clz == classOf[Array[Byte]] => toConnectProtoType(BinaryType) + case _ if clz == classOf[Array[Char]] => toConnectProtoType(StringType) + case _ if clz == classOf[JShort] => toConnectProtoType(ShortType) + case _ if clz == classOf[JInteger] => toConnectProtoType(IntegerType) + case _ if clz == classOf[JLong] => toConnectProtoType(LongType) + case _ if clz == classOf[JDouble] => toConnectProtoType(DoubleType) + case _ if clz == classOf[JByte] => toConnectProtoType(ByteType) + case _ if clz == classOf[JFloat] => toConnectProtoType(FloatType) + case _ if clz == classOf[JBoolean] => toConnectProtoType(BooleanType) + + // other scala classes + case _ if clz == classOf[String] => toConnectProtoType(StringType) + case _ if clz == classOf[BigInt] || clz == classOf[BigDecimal] => + toConnectProtoType(DecimalType.SYSTEM_DEFAULT) + case _ if clz == classOf[CalendarInterval] => toConnectProtoType(CalendarIntervalType) Review Comment: Should not be possible to call `toConnectProtoType` directly because the `elementType` of `ArrayType` cannot be determined there -- This is an automated message from the Apache Git Service. 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