Table of Contents

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  1. Preface
  2. Transformations
  3. Source transformation
  4. Target transformation
  5. Access Policy transformation
  6. B2B transformation
  7. Aggregator transformation
  8. Cleanse transformation
  9. Data Masking transformation
  10. Data Services transformation
  11. Deduplicate transformation
  12. Expression transformation
  13. Filter transformation
  14. Hierarchy Builder transformation
  15. Hierarchy Parser transformation
  16. Hierarchy Processor transformation
  17. Input transformation
  18. Java transformation
  19. Java transformation API reference
  20. Joiner transformation
  21. Labeler transformation
  22. Lookup transformation
  23. Machine Learning transformation
  24. Mapplet transformation
  25. Normalizer transformation
  26. Output transformation
  27. Parse transformation
  28. Python transformation
  29. Rank transformation
  30. Router transformation
  31. Rule Specification transformation
  32. Sequence Generator transformation
  33. Sorter transformation
  34. SQL transformation
  35. Structure Parser transformation
  36. Transaction Control transformation
  37. Union transformation
  38. Velocity transformation
  39. Verifier transformation
  40. Web Services transformation

Transformations

Transformations

Velocity template

Velocity template

You create the Velocity template on the
Velocity
tab. To create the template, enter or paste the template in the template editor. Then click
Validate
to validate the syntax.
The following image shows the template editor:
The Velocity Template tab contains a list of built-in functions on the left and the template editor on the right.
The template can contain VTL statements,
Data Integration
built-in functions, and
Data Integration
unconnected lookup expressions. For more information about the Velocity Template Language, see the Apache Velocity documentation.
To call a built-in function, use the following syntax:
$function.call('<function name>',<argument>,<argument>,...)
For example, the following template code returns the system time stamp in an XML comment:
<!--Generation date: $function.call('Systimestamp')-->
The following function call passes the property $vendor.name as an argument to the INITCAP function to capitalize the first letter of each word in the vendor name:
$function.call('InitCap',$vendor.name)
You can select a function in the
Built-in Functions
list to copy the function call syntax into the template at the cursor position.
To call an unconnected lookup, use the following syntax:
$function.call(':LKP.<Lookup transformation name>)',<argument>,<argument>,...)
For example, the following expression passes the properties $item.id and $item.category as arguments to an unconnected lookup Transformation named lkp_ItemPrices:
$function.call(':LKP.lkp_ItemPrices',$item.id,$item.category)
To validate the syntax, click
Validate
.
Data Integration
checks the template and displays any syntax errors. If the template syntax is invalid, you can save the mapping but the mapping is invalid.
Validation does not test the template output or find runtime errors. You can test the template output on the
Test
tab.

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