Re: [Swig-user] java access to my C++ objects

[William S F. <ws...@fu...>]

The typemaps in typemaps.i are for primitive types, but I assume 
controller is a non-primitive type. The SWIGTYPE*& typemaps in java.swg 
should ensure that passing controller*& should just work. If it doesn't 
please post a complete standalone example.

William

Chip Christian wrote:
> Something like this?
> 
> %typemap(in) (controller*&) { $1 = (controller**) &$input; }
> %typemap(out) (controller*&) { $result = $1; }
> 
> On Thu, Jul 23, 2009 at 12:01 PM, Chip
> Christian<chi...@gm...> wrote:
>> int myController(controller*& OUTPUT);
>>
>> Called like so:
>>
>>  public static void main(String argv[]) {
>>    controller c = null;
>>    int r = cluster.theCluster().myController(c);
>>        System.out.println(r);
>>        System.out.println(c.getUUID());
>>  }
>>
>> 0
>> Exception in thread "main" java.lang.NullPointerException
>>   at allshow.main(allshow.java:15)
>>
>>
>>
>>
>>
>>
>>
>>
>> On Thu, Jul 23, 2009 at 11:11 AM, Chip
>> Christian<chi...@gm...> wrote:
>>> RTFM, Chip.
>>>
>>> OK, I added
>>> %include "typemaps.i"
>>>
>>> and named the parameters OUTPUT in my .h files.  Do I have to do
>>> anything special to initialize c?
>>>
>>> On Thu, Jul 23, 2009 at 10:35 AM, Chip
>>> Christian<chi...@gm...> wrote:
>>>> I have a collection of classes in C++ with private constructors.
>>>>
>>>> Can I do this, or do I need to make changes to my model?
>>>>
>>>> There are 5 ways to get the various objects:
>>>>
>>>> - a singleton
>>>>  no problems
>>>>
>>>> - a static method which takes an object*& in the parameter list
>>>> - a static method which takes a vector<object>*& in the parameter list
>>>> - a method which takes an other_object*& in the parameter list
>>>> - a method which takes a vector<other_object>*& in the parameter list
>>>>
>>>> I've tried a few things:
>>>>
>>>> controller c;
>>>> cluster.theCluster.myController(c);
>>>>
>>>> Compile error:
>>>> The local variable c may not have been initialized
>>>>
>>>> controller c = new controller();
>>>> cluster.theCluster.myController(c);
>>>>
>>>> Compile error:
>>>> The constructor controller() is undefined
>>>>
>>>> controller c[] = new controller[1];
>>>> cluster.theCluster.myController(c[0]);
>>>>
>>>> Runtime error when I try to dereference c[0]:
>>>> Exception in thread "main" java.lang.NullPointerException
>>>>
> 
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