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Improvement: FlinkBaseTypeInfoRegister mechanism
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109 changes: 109 additions & 0 deletions
109
...cala/pl/touk/nussknacker/engine/flink/api/typeinformation/FlinkBaseTypeInfoRegister.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| package pl.touk.nussknacker.engine.flink.api.typeinformation | ||
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| import org.apache.flink.api.common.typeinfo.{TypeInfoFactory, TypeInformation, Types} | ||
| import org.apache.flink.api.java.typeutils.TypeExtractor | ||
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| import java.lang.reflect.Type | ||
| import java.sql.{Date => SqlDate, Time => SqlTime, Timestamp => SqlTimestamp} | ||
| import java.time.{Instant, LocalDate, LocalDateTime, LocalTime} | ||
| import java.util | ||
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| object FlinkBaseTypeInfoRegister { | ||
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| private case class Base[T](klass: Class[T], factory: TypeInfoFactory[T]) { | ||
| lazy val factoryClass: Class[_ <: TypeInfoFactory[T]] = factory.getClass | ||
| } | ||
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| private val baseTypes = List( | ||
| Base(classOf[LocalDate], new LocalDateTypeFactory), | ||
| Base(classOf[LocalTime], new LocalTimeTypeFactory), | ||
| Base(classOf[LocalDateTime], new LocalDateTimeTypeFactory), | ||
| Base(classOf[Instant], new InstantTypeFactory), | ||
| Base(classOf[SqlDate], new SqlDateTypeFactory), | ||
| Base(classOf[SqlTime], new SqlTimeTypeFactory), | ||
| Base(classOf[SqlTimestamp], new SqlTimestampTypeFactory), | ||
| ) | ||
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| def makeSureBaseTypesAreRegistered(): Unit = | ||
| baseTypes.foreach { base => | ||
| register(base) | ||
| } | ||
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| private def register(base: Base[_]): Unit = { | ||
| val opt = Option(TypeExtractor.getTypeInfoFactory(base.klass)) | ||
| if (opt.isEmpty) { | ||
| TypeExtractor.registerFactory(base.klass, base.factoryClass) | ||
| } | ||
| } | ||
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| class LocalDateTypeFactory extends TypeInfoFactory[LocalDate] { | ||
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| override def createTypeInfo( | ||
| t: Type, | ||
| genericParameters: util.Map[String, TypeInformation[_]] | ||
| ): TypeInformation[LocalDate] = | ||
| Types.LOCAL_DATE | ||
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| } | ||
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| class LocalTimeTypeFactory extends TypeInfoFactory[LocalTime] { | ||
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| override def createTypeInfo( | ||
| t: Type, | ||
| genericParameters: util.Map[String, TypeInformation[_]] | ||
| ): TypeInformation[LocalTime] = | ||
| Types.LOCAL_TIME | ||
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| } | ||
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| class LocalDateTimeTypeFactory extends TypeInfoFactory[LocalDateTime] { | ||
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| override def createTypeInfo( | ||
| t: Type, | ||
| genericParameters: util.Map[String, TypeInformation[_]] | ||
| ): TypeInformation[LocalDateTime] = | ||
| Types.LOCAL_DATE_TIME | ||
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| } | ||
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| class InstantTypeFactory extends TypeInfoFactory[Instant] { | ||
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| override def createTypeInfo( | ||
| t: Type, | ||
| genericParameters: util.Map[String, TypeInformation[_]] | ||
| ): TypeInformation[Instant] = | ||
| Types.INSTANT | ||
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| } | ||
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| class SqlDateTypeFactory extends TypeInfoFactory[SqlDate] { | ||
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| override def createTypeInfo( | ||
| t: Type, | ||
| genericParameters: util.Map[String, TypeInformation[_]] | ||
| ): TypeInformation[SqlDate] = | ||
| Types.SQL_DATE | ||
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| } | ||
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| class SqlTimeTypeFactory extends TypeInfoFactory[SqlTime] { | ||
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| override def createTypeInfo( | ||
| t: Type, | ||
| genericParameters: util.Map[String, TypeInformation[_]] | ||
| ): TypeInformation[SqlTime] = | ||
| Types.SQL_TIME | ||
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| } | ||
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| class SqlTimestampTypeFactory extends TypeInfoFactory[SqlTimestamp] { | ||
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| override def createTypeInfo( | ||
| t: Type, | ||
| genericParameters: util.Map[String, TypeInformation[_]] | ||
| ): TypeInformation[SqlTimestamp] = | ||
| Types.SQL_TIMESTAMP | ||
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| } | ||
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| } |
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