ok, I think I get it. What you suggesting is an implementation that uses
the singleton pattern delegated from the
static methods already in place, right?
Rick McGuire wrote:
> Yes, but the class with the static methods is still the starting
> point. Replaceable classes with static methods were chosen for these
> interfaces because they allow an implementation a lot more flexibility
> in how things get implemented, including the use of inline methods, if
> appropriate. So, the z/OS version of SysFileSystem would probably
> have methods that looked like this:
>
> bool SysFileSystem::searchFileName(const char *name, char *fullName)
> {
> return getInstance()->searchFileName(name, fullName);
> }
>
> Where the instance returned would be a subclass of your base virtual
> class. Then this is a matter of just adjusting the build to pick up
> your version of SysFileSystem rather than the base unix one.
>
> Rick
>
> On Mon, Aug 11, 2008 at 10:19 AM, David Crayford <[EMAIL PROTECTED]> wrote:
>
>> That's an excellent idea! Are you suggesting implementing the delegate
>> design pattern? In which case
>> an abstract base class of pure virtual functions (Java interface) would
>> be required or implementing
>> z/OS platform code to the source tree.
>>
>> Rick McGuire wrote:
>>
>>> I think the approach here would be to have the SysFileSystem class
>>> remain the interface between the portable code and the platform, and
>>> have its method delegate to a specific pluggable instance.
>>>
>>> Rick
>>>
>>> On Mon, Aug 11, 2008 at 9:59 AM, David Crayford <[EMAIL PROTECTED]> wrote:
>>>
>>>
>>>> ooRexx seems to only handle one type of file system based on the
>>>> platform. On my system (z/OS) there are different file systems depending
>>>> on the runtime environment. We have a UNIX file system and a traditional
>>>> mainframe filesystem using PDS data sets. There is also a UNIX like file
>>>> system in CICS. The SysFileSystem class is static, what I really need is
>>>> a SysFileSystem factory or different builds depending on where I
>>>> want to deploy. Any suggestions? I'm jumping the gun here a bit as I'm
>>>> only just starting to code in anger, but it's a concern...
>>>>
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