Package org.apache.iotdb.commons.udf.builtin

Class UDTFValueTrend

  • All Implemented Interfaces:
    org.apache.iotdb.udf.api.UDF, org.apache.iotdb.udf.api.UDTF
    Direct Known Subclasses:
    UDTFDerivative, UDTFValueDifference
    public abstract class UDTFValueTrend
extends java.lang.Object
implements org.apache.iotdb.udf.api.UDTF

    • Constructor Summary

      Constructors 
      Constructor Description
      UDTFValueTrend()  

    • Method Summary

      All Methods Instance Methods Abstract Methods Concrete Methods 
      Modifier and Type Method Description
      protected abstract void doTransform​(org.apache.iotdb.udf.api.access.Row row, org.apache.iotdb.udf.api.collector.PointCollector collector)  
      protected void updatePreviousValue​(org.apache.iotdb.udf.api.access.Row row)  
      void validate​(org.apache.iotdb.udf.api.customizer.parameter.UDFParameterValidator validator)  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

      • Methods inherited from interface org.apache.iotdb.udf.api.UDF

        beforeDestroy

      • Methods inherited from interface org.apache.iotdb.udf.api.UDTF

        beforeStart, terminate, transform, transform, transform

    • Field Detail

      • hasPrevious

        protected boolean hasPrevious

      • previousInt

        protected int previousInt

      • previousLong

        protected long previousLong

      • previousFloat

        protected float previousFloat

      • previousDouble

        protected double previousDouble

      • dataType

        protected org.apache.iotdb.tsfile.file.metadata.enums.TSDataType dataType

    • Constructor Detail

      • UDTFValueTrend

        public UDTFValueTrend()

    • Method Detail

      • validate

        public void validate​(org.apache.iotdb.udf.api.customizer.parameter.UDFParameterValidator validator)
              throws org.apache.iotdb.udf.api.exception.UDFException
        Specified by:
        validate in interface org.apache.iotdb.udf.api.UDF
        Throws:
        org.apache.iotdb.udf.api.exception.UDFException

      • updatePreviousValue

        protected void updatePreviousValue​(org.apache.iotdb.udf.api.access.Row row)
                            throws org.apache.iotdb.udf.api.exception.UDFInputSeriesDataTypeNotValidException,
                                   java.io.IOException
        Throws:
        org.apache.iotdb.udf.api.exception.UDFInputSeriesDataTypeNotValidException
        java.io.IOException

      • doTransform

        protected abstract void doTransform​(org.apache.iotdb.udf.api.access.Row row,
                                    org.apache.iotdb.udf.api.collector.PointCollector collector)
                             throws org.apache.iotdb.udf.api.exception.UDFInputSeriesDataTypeNotValidException,
                                    java.io.IOException
        Throws:
        org.apache.iotdb.udf.api.exception.UDFInputSeriesDataTypeNotValidException
        java.io.IOException