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Bret Hansen
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Not usually applicable
07/30/03 01:29 AM
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While the pattern does reduce object creation it is not always as applicable as this article implies. For instance the line drawing example has a huge issue. It can not repaint itself after a blur. The data to paint it is not stored anywhere. The heavy weight version could be readily modified to be re-drawable.
The swing tree node example that displayed the file system does work well, because the state is stored in the file system. If the re-fetch of the data was more expensive (like database or web service) then it would be necessary to maintain sufficient state to repaint.
The article is concise though!
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