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From James M Snell <jasn...@gmail.com>
Subject Re: Coding/Language Standards
Date Thu, 28 Sep 2006 15:47:28 GMT
The List<?> methods exist mainly to support easy iteration and getting
of the entries.  They are unmodifiable lists, meaning that calling any
of the add/remove operations will result in an unsupported operation
exception.

- James

Harris Boyce III wrote:
> Right and I think this is where the rub lies.  I've been "brought-up"
> that, unless the data is read-only, you just generally implement
> read/write properties so I can easily implement it as:
> 
> List<Entry> Entries {
>  get;
> }
> 
> But even with that, nothing prevents the user accessing the feed from
> calling theFeed.Entries.Add(someEntry);  Now, the implementation could
> return a read-only List and then any modifying operations would
> generate exceptions.  But...why would I do that?
> 
> Does that make any sense?  I'm hoping that this doesn't seem like an
> immature conversation, but it's one that I struggle with when I study
> Java.  Why wouldn't I just use those conveience methods to modify the
> list if and when I need to do so?
> 
> Thanks again for the discussion!  I'm learning lots!
> 
> H
> 
> On 9/28/06, Garrett Rooney <rooneg@electricjellyfish.net> wrote:
>> On 9/28/06, Harris Boyce III <harris.r.boyce.iii@gmail.com> wrote:
>> > Garrett -
>> >
>> > Yeah, shoulda done that to begin with, sorry...OK, from package
>> > org.apache.abdera.model, interface Feed defines these methods:
>> >
>> > List<Entry> getEntries();
>> > void addEntry(Entry entry);
>> > ...
>> > Entry getEntry(String id);
>> >
>> > In .NET, I could define these as properties like this:
>> >
>> > List<Entry> Entries {
>> >   get;
>> >   set;
>> > }
>> >
>> > And then, normally, I would use the methods exposed by List<Entry> to
>> > perform operations on the Entries (add, remove, etc.).  Now, granted,
>> > I would have to implement a method to retrieve the entry by ID just as
>> > done above.  But I guess my question may be centered around the
>> > encapsulation standards across the languages?  Maybe?
>> >
>> > Does that clarify any?  If not, let me know.
>>
>> Well, you'd definately want the getter for the entries, but setting an
>> entire list of entries is kind of weird IMO...  Perhaps other people
>> have optinions.
>>
>> -garrett
>>
> 

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