So, to continue our discussion a bit on Groovy categories, here's
what GinA has to say about when to use (some of these we actually
touched on last night):
- Incomplete Libraries
- To provide special purpose methods (the example they use is a
StringCalculator that overrides a calculate method specifically for
handling strings as opposed to integers)
- To provide a collection of methods on different receivers that work
in combination - for example, a new encryptedWrite method on
java.io.OutputStream and decryptedRead on java.io.InputStream
- Where you would normally use a Decorator pattern
- to split an overly large class into a core class and multiple
aspect categories that are used with the core class as needed. Note
that use() can take any number of Category classes.
And I also talked about importing libraries/classes with the "as"
keyword, here's an example:
import java.awt.BorderLayout as BL
-warner
Warner Onstine - Programmer/Author
New book! Tapestry 101 available at http://sourcebeat.com/books/
tapestrylive.html
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