Re: [fpc-other] Object Pascal Interface Delegation, but in Java
On 2017-09-10 00:31, Marco van de Voort wrote: And you don't risk forgetting adding a method to existing classes Java will give a compilation error if you do, so nothing to worry about there. always a risk with manual workarounds like the codegeneration tools that assume everything is designed at once top-down and only then implemented. Eclipse allows you to run the "wizard" multiple times and will add and remove code depending on what you ticked and unticked. Eclipse's code generation is very impressive. Regards, Graeme -- fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal http://fpgui.sourceforge.net/ My public PGP key: http://tinyurl.com/graeme-pgp ___ fpc-other maillist - fpc-other@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-other
Re: [fpc-other] Object Pascal Interface Delegation, but in Java
In our previous episode, Graeme Geldenhuys said: > > That is often called delegation, and if you search for java and delegation, > > it seems not (which is not THAT surprising IMHO): > > Thanks Marco. So it is actually similar to Object Pascal where you use > object composition, but with Object Pascal's "implements" keyboard the > interface is automatic in the new class's interface. Where-as with Java > you have to define the interface and then delegate the calls to the > composition object. I'm sure Eclipse must have that code-generation > functionality built-in or an add-on that can do that. > > So Object Pascal is just a bit more convenient, but the end-result > (functionality) is the same in. Well, with Pascal's syntax you could link through VMT fragments, without actually bouncing through additional code. And you don't risk forgetting adding a method to existing classes if you add one to the interface, always a risk with manual workarounds like the codegeneration tools that assume everything is designed at once top-down and only then implemented. ___ fpc-other maillist - fpc-other@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-other
Re: [fpc-other] Object Pascal Interface Delegation, but in Java
On 2017-09-09 18:17, Graeme Geldenhuys wrote: I'm sure Eclipse must have that code-generation functionality built-in or an add-on that can do that. And my guess was correct. :) In Eclipse select "Source -> Generate Delegate Methods". Select the field variable that will do the delegation. Eclipse fully implements all (or selected) methods of delegate member as delegate methods. Regards, Graeme ___ fpc-other maillist - fpc-other@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-other
Re: [fpc-other] Object Pascal Interface Delegation, but in Java
On 2017-09-09 17:39, Marco van de Voort wrote: That is often called delegation, and if you search for java and delegation, it seems not (which is not THAT surprising IMHO): Thanks Marco. So it is actually similar to Object Pascal where you use object composition, but with Object Pascal's "implements" keyboard the interface is automatic in the new class's interface. Where-as with Java you have to define the interface and then delegate the calls to the composition object. I'm sure Eclipse must have that code-generation functionality built-in or an add-on that can do that. So Object Pascal is just a bit more convenient, but the end-result (functionality) is the same in. Thanks again for your input. Regards, Graeme -- fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal http://fpgui.sourceforge.net/ My public PGP key: http://tinyurl.com/graeme-pgp ___ fpc-other maillist - fpc-other@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-other
Re: [fpc-other] Object Pascal Interface Delegation, but in Java
In our previous episode, Graeme Geldenhuys said: > > Does anybody familiar with Object Pascal and Java know if Java supports > something similar to Object Pascal's Interface Delegation "implements > syntax" functionality? That is often called delegation, and if you search for java and delegation, it seems not (which is not THAT surprising IMHO): https://stackoverflow.com/questions/2989005/delegation-example-regarding-java-context ___ fpc-other maillist - fpc-other@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-other
