Table of Contents

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  1. Preface
  2. Working with Transformations
  3. Aggregator Transformation
  4. Custom Transformation
  5. Custom Transformation Functions
  6. Data Masking Transformation
  7. Data Masking Examples
  8. Expression Transformation
  9. External Procedure Transformation
  10. Filter Transformation
  11. HTTP Transformation
  12. Identity Resolution Transformation
  13. Java Transformation
  14. Java Transformation API Reference
  15. Java Expressions
  16. Java Transformation Example
  17. Joiner Transformation
  18. Lookup Transformation
  19. Lookup Caches
  20. Dynamic Lookup Cache
  21. Normalizer Transformation
  22. Rank Transformation
  23. Router Transformation
  24. Sequence Generator Transformation
  25. Sorter Transformation
  26. Source Qualifier Transformation
  27. SQL Transformation
  28. Using the SQL Transformation in a Mapping
  29. Stored Procedure Transformation
  30. Transaction Control Transformation
  31. Union Transformation
  32. Unstructured Data Transformation
  33. Update Strategy Transformation
  34. XML Transformations

Transformation Guide

Transformation Guide

Input and Output Ports

Input and Output Ports

The Java transformation initializes the value of unconnected input ports or output ports that do not have an assigned value in the Java code snippets.
Java transformation initializes ports based on the following Java data types:
Primitive data type
If you define a default value for the port that is not equal to null, the transformation initializes the value of the port variable to the default value. Otherwise, it initializes the value of the port variable to 0.
Complex data type
If you define a default value for the port, the transformation creates a new object, and initializes the object to the default value. Otherwise, the transformation initializes the port variable to null. For example, if you define a default value for a string port, the transformation creates a new String object, and initializes the String object to the default value.
If you access an input port variable with a null value in the Java code, a NullPointerException occurs.
You can enable an input port as a partition key and a sort key, and you can assign a sort direction. The Data Integration Service partitions the data and sorts the data in each partition by the sort key and sort direction. The Partition Key and Sort Key are valid when the transformation scope is set to All Input.
Use the following properties for partitioning and sorting data:
Partition Key
Input port that determines the rows of data to group into the same partition.
You can enable one or more input rows as partition keys. The Data Integration Service uses the partition keys to repartition the data before the code runs. If you do not select an input row as a partition key, the data is processed using its default partitioning scheme.
Sort Key
Input port that determines the sort criteria within each partition.
Direction
Ascending or descending order. Default is ascending.

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