Rational Programming Patterns

Inserting code with micropatterns and snippets

You can insert code in the COBOL code of generated instances by inserting micropatterns or snippets.

There are two types of micropatterns:
  • Some micropatterns are operators with a strong added value. They fetch information from the design or from the use context. You insert them in Macros or in the COBOL code of a Program, Screen, or Server. When the instance is generated again, they automatically produce the corresponding code lines. Each micropattern declaration is kept in the code as it was entered. You can then modify this declaration later and generate the instance again to take the modification into account.
  • Other micropatterns are operators with a low added value. They are used to retrieve the Pacbase data. They are recognized upon generation to produce a code identical to the Pacbase code. You must not enter them in the code because they have a low added value. It is advised to enter the corresponding code lines instead.
Snippets provide a data entry form to insert code. You must insert them by dragging them within the code. Insertion wizards prompt you to assign values to the variables of some snippets. When they are inserted, snippets drop the corresponding code lines, which do not keep trace of the snippet declaration. To make any changes, you must modify the code lines manually in the PDP COBOL editor or in the Macro editor.
Note: Some snippets (WS, WI, WE, WS) make it easier to declare certain micropatterns. These snippets insert the code which corresponds to the micropattern declaration.

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