Class variables

You can unload a collection of class variables either with their current values or with new values that you set. If you set new values, ENVY/App overwrites the values existing in the image into which the variables are being loaded.

You use the method dumpClassVariable:in: to unload class variables with their current values, and dumpClassVariable:withValue:in: to unload them with new values.

Two examples illustrate how to unload class variables

•	Example: Unloading a class variable with its current value and

•	Example: Unloading a class variable with a specific value.

Prior to executing the code in any of these examples, load packaging instructions and create an instance of EaComponentMapManager called ComponentMaps by executing Step 1 of Example: Unloading an application and its subapplications.

 

Example: Unloading a class variable with its current value

Suppose a class named Alpha has the following definition:

Object subclass: #Alpha

classInstanceVariableNames: 'a b'

instanceVariableNames: 'c d'

classVariableNames: 'E F'

poolDictionaries: 'G'

To unload the class variable "E" with its current value into a file named alpha.ic, you use statements in the following code fragment:

"Step 2: Unload the class variable E into alpha.ic."

| result |

(result := ApplicationDumper new)

...

dumpClassVariable: 'E' in: Alpha;

...

dumpIntoFileNamed: 'alpha.ic' path: '.' using: ComponentMaps.

...

Example: Unloading a class variable with a specific value

Suppose, for the class Alpha defined in Example: Unloading a class variable with its current value, you want to unload the class variable "E" with a current value of 100 into a file named alpha.ic. To do so, you use the following code fragment:

"Step 2: Unload the class variable E having a value 100 into alpha.ic."

| result |

(result := ApplicationDumper new)

...

dumpClassVariable: 'E' withValue: 100 in: Alpha;

...

dumpIntoFileNamed: 'alpha.ic' path: '.' using: ComponentMaps.

...