Table of Contents

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  1. Preface
  2. Introduction to Transformations
  3. Transformation Ports
  4. Transformation Caches
  5. Address Validator Transformation
  6. Aggregator Transformation
  7. Association Transformation
  8. Bad Record Exception Transformation
  9. Case Converter Transformation
  10. Classifier Transformation
  11. Comparison Transformation
  12. Consolidation Transformation
  13. Data Masking Transformation
  14. Data Processor Transformation
  15. Decision Transformation
  16. Duplicate Record Exception Transformation
  17. Expression Transformation
  18. Filter Transformation
  19. Hierarchical to Relational Transformation
  20. Java Transformation
  21. Java Transformation API Reference
  22. Java Expressions
  23. Joiner Transformation
  24. Key Generator Transformation
  25. Labeler Transformation
  26. Lookup Transformation
  27. Lookup Caches
  28. Dynamic Lookup Cache
  29. Macro Transformation
  30. Match Transformation
  31. Match Transformations in Field Analysis
  32. Match Transformations in Identity Analysis
  33. Normalizer Transformation
  34. Merge Transformation
  35. Parser Transformation
  36. Python Transformation
  37. Rank Transformation
  38. Read Transformation
  39. Relational to Hierarchical Transformation
  40. REST Web Service Consumer Transformation
  41. Router Transformation
  42. Sequence Generator Transformation
  43. Sorter Transformation
  44. SQL Transformation
  45. Standardizer Transformation
  46. Union Transformation
  47. Update Strategy Transformation
  48. Web Service Consumer Transformation
  49. Parsing Web Service SOAP Messages
  50. Generating Web Service SOAP Messages
  51. Weighted Average Transformation
  52. Window Transformation
  53. Write Transformation
  54. Appendix A: Transformation Delimiters

Developer Transformation Guide

Developer Transformation Guide

Java Expressions Overview

Java Expressions Overview

You can invoke expressions in a Java transformation with the Java programming language.
Use expressions to extend the functionality of a Java transformation. For example, you can invoke an expression in a Java transformation to look up the values of input or output ports or look up the values of Java transformation variables.
To invoke expressions in a Java transformation, you generate the Java code or use Java transformation API methods to invoke the expression. You invoke the expression and use the result of the expression on the appropriate code entry tab. You can generate the Java code that invokes an expression or use API methods to write the Java code that invokes the expression.
The following table describes the methods that you can use to create and invoke expressions in a Java transformation:
Method
Description
Define Function
dialog box
Enables you to create
a function that invokes
an expression and generate the code for an expression.
Simple interface
Enables you to call a single API method to invoke an expression and get the result of the expression.
Advanced interface
Enables you to define the expression, invoke the expression, and use the result of the expression.
If you are familiar with object-oriented programming and want more control over invoking the expression, use the advanced interface.

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