Difference between revisions of "Internal and Expanded"
(New page: Category:Persistence We are discussing here how to export the description of expanded fields in a normal object to enable a fast and efficient introspection of objects at runtime. We w...) |
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[[Category:Persistence]] | [[Category:Persistence]] | ||
We are discussing here how to export the description of expanded fields in a normal object to enable a fast and efficient introspection of objects at runtime. We will describe the various possibilities the last one being the implementation we have chosen in EiffelStudio. | We are discussing here how to export the description of expanded fields in a normal object to enable a fast and efficient introspection of objects at runtime. We will describe the various possibilities the last one being the implementation we have chosen in EiffelStudio. | ||
| + | |||
| + | To make the discussion consistent, let's suppose we have the following set of classes: | ||
| + | |||
| + | <code> | ||
| + | class A | ||
| + | feature | ||
| + | b: B | ||
| + | sa: STRING | ||
| + | end | ||
| + | |||
| + | expanded class B | ||
| + | feature | ||
| + | c: C | ||
| + | sb: STRING | ||
| + | end | ||
| + | |||
| + | expanded class C | ||
| + | feature | ||
| + | sc: STRING | ||
| + | end | ||
| + | </code> | ||
==Nothing special== | ==Nothing special== | ||
| + | As of version 6.5 and before of EiffelStudio, one can use `field' and `set_field' to get and set the expanded attributes | ||
| + | |||
| + | '''pros''': simple | ||
| + | '''cons''': very inefficient | ||
| + | |||
| + | ==Extra fields== | ||
| + | The attributes of the expanded are also visible as extra fields of the object. In other words | ||
Revision as of 10:32, 23 March 2010
We are discussing here how to export the description of expanded fields in a normal object to enable a fast and efficient introspection of objects at runtime. We will describe the various possibilities the last one being the implementation we have chosen in EiffelStudio.
To make the discussion consistent, let's suppose we have the following set of classes:
class A feature b: B sa: STRING end expanded class B feature c: C sb: STRING end expanded class C feature sc: STRING end
Nothing special
As of version 6.5 and before of EiffelStudio, one can use `field' and `set_field' to get and set the expanded attributes
pros: simple cons: very inefficient
Extra fields
The attributes of the expanded are also visible as extra fields of the object. In other words
