Eclipse Community Forums
Forum Search:

Search      Help    Register    Login    Home
Home » Eclipse Projects » C-Sharp » Use intermediate models
Use intermediate models [message #468671] Fri, 25 July 2008 17:46 Go to next message
Ed Willink is currently offline Ed WillinkFriend
Messages: 4154
Registered: July 2009
Senior Member
Hi

If, rather than transforming direct from Java to C-sharp, you
transform in multiple stages

JavaText->JavaModel->GenericObjectOrientedModel->C-sharpModel- >C-sharpText

there will be more opportunities for re-use:

e.g.

GenericObjectOrientedModel->C++Model->C++Text
GenericObjectOrientedModel->CModel->CText

and of course

GenericObjectOrientedModel->JavaModel->JavaText
C-sharpText->C-sharpModel->->GenericObjectOrientedModel

Regards

Ed Willink
Re: Use intermediate models [message #468677 is a reply to message #468671] Sat, 26 July 2008 17:29 Go to previous messageGo to next message
Alexandre FAU is currently offline Alexandre FAUFriend
Messages: 17
Registered: July 2009
Junior Member
Hello,

> If, rather than transforming direct from Java to C-sharp, you
> transform in multiple stages
> JavaText->JavaModel->GenericObjectOrientedModel->C-sharpModel- >C-sharpText
Is more or less what the translator already does.
I start with a java buffer and I slowly transform it into a java
compatible generic object oriented buffer (no nested class, ...). Then I
start hardest modifications (not java compatible) to obtain a c-sharp
buffer.
I always use the JDT model to build the AST, I do not have any
intermediate model (but I agree with you it could be an option).

Thanks.

Alexandre.
Re: Use intermediate models [message #468688 is a reply to message #468677] Sun, 03 August 2008 12:59 Go to previous messageGo to next message
Eclipse UserFriend
Originally posted by: jose.chillan_eclipse.polytechnique.org

Hi,
I think for my part that the pivot model is key for an efficient and
flexible resolution of the conversion.
Although I think the actual implementation is great and provide very good
value, I think I need this pivot model that is not the Java AST, neither
the
C# AST, but rather something out of the languages : a description of the
business and algorithms implemented.
I my view, the Java and C# source code are just "projections" of
this "knowledge" in different languages, and this allow to implement
several
other projections in the future when needed.
As an exemple, a toString() method in Java has to be renamed "ToString()"
in
C#. But I would represent it as a "method that gives a string
representation
of the object" for which we have additional attribute that are the Java
name (toString) and C# name (ToString), and that could be enriched with
information
upon needs.
In addition, I want to be able to recognize code patterns in the code
differents than those necessary to the refactoring in order to apply other
types of transformations in the code for a special purpose conversion,
directly
on the "pivot AST".
One way to achieve this without too much work would be to enrich the Java
code
during the transformation with special comments generated after each phase
that would represent the "pivot AST" serialization. This would allow the
actual refactoring process as comments are kept during most refactor
operations and thus, at any point of the process,it would be possible to
add
custom transformation in addition.
Last, the final source code generation would be performed on the pivot AST
basis.

Jose
Re: Use intermediate models [message #468701 is a reply to message #468688] Mon, 04 August 2008 08:29 Go to previous message
Alexandre FAU is currently offline Alexandre FAUFriend
Messages: 17
Registered: July 2009
Junior Member
Hello Jose,

Thanks for your support and ideas.

As you propose in order to have a "Java to OtherLanguage translation
tools" the common/pivot model is the key. The first part of the
translation do a similar job (but with less information that your
describe).
We need to look your ideas and the academic side too (in order to not
re-inventing the wheel :-)).
I also like to have a transformation language much more powerful than the
current. For example I want to express that new MyClass(new OtherClass())
have a different mapping than new MyClass() [really useful for IO mappings
...] which is not possible right now.

@lex
Re: Use intermediate models [message #565002 is a reply to message #468671] Sat, 26 July 2008 17:29 Go to previous message
Alex FAU is currently offline Alex FAUFriend
Messages: 15
Registered: May 2010
Junior Member
Hello,

> If, rather than transforming direct from Java to C-sharp, you
> transform in multiple stages
> JavaText->JavaModel->GenericObjectOrientedModel->C-sharpModel- >C-sharpText
Is more or less what the translator already does.
I start with a java buffer and I slowly transform it into a java
compatible generic object oriented buffer (no nested class, ...). Then I
start hardest modifications (not java compatible) to obtain a c-sharp
buffer.
I always use the JDT model to build the AST, I do not have any
intermediate model (but I agree with you it could be an option).

Thanks.

Alexandre.
Re: Use intermediate models [message #565093 is a reply to message #468677] Sun, 03 August 2008 12:59 Go to previous message
Eclipse UserFriend
Originally posted by: jose.chillan_eclipse.polytechnique.org

Hi,
I think for my part that the pivot model is key for an efficient and
flexible resolution of the conversion.
Although I think the actual implementation is great and provide very good
value, I think I need this pivot model that is not the Java AST, neither
the
C# AST, but rather something out of the languages : a description of the
business and algorithms implemented.
I my view, the Java and C# source code are just "projections" of
this "knowledge" in different languages, and this allow to implement
several
other projections in the future when needed.
As an exemple, a toString() method in Java has to be renamed "ToString()"
in
C#. But I would represent it as a "method that gives a string
representation
of the object" for which we have additional attribute that are the Java
name (toString) and C# name (ToString), and that could be enriched with
information
upon needs.
In addition, I want to be able to recognize code patterns in the code
differents than those necessary to the refactoring in order to apply other
types of transformations in the code for a special purpose conversion,
directly
on the "pivot AST".
One way to achieve this without too much work would be to enrich the Java
code
during the transformation with special comments generated after each phase
that would represent the "pivot AST" serialization. This would allow the
actual refactoring process as comments are kept during most refactor
operations and thus, at any point of the process,it would be possible to
add
custom transformation in addition.
Last, the final source code generation would be performed on the pivot AST
basis.

Jose
Re: Use intermediate models [message #565134 is a reply to message #468688] Mon, 04 August 2008 08:29 Go to previous message
Alex FAU is currently offline Alex FAUFriend
Messages: 15
Registered: May 2010
Junior Member
Hello Jose,

Thanks for your support and ideas.

As you propose in order to have a "Java to OtherLanguage translation
tools" the common/pivot model is the key. The first part of the
translation do a similar job (but with less information that your
describe).
We need to look your ideas and the academic side too (in order to not
re-inventing the wheel :-)).
I also like to have a transformation language much more powerful than the
current. For example I want to express that new MyClass(new OtherClass())
have a different mapping than new MyClass() [really useful for IO mappings
...] which is not possible right now.

@lex
Previous Topic:.NET tooling?
Next Topic:.NET tooling?
Goto Forum:
  


Current Time: Wed Nov 26 21:45:41 GMT 2014

Powered by FUDForum. Page generated in 0.01767 seconds
.:: Contact :: Home ::.

Powered by: FUDforum 3.0.2.
Copyright ©2001-2010 FUDforum Bulletin Board Software