Re: [Swig-user] [Fwd: Re: obtaining iterator in Java]

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

Dave Ludwig wrote:
> Dave Ludwig wrote:
>> I have the following items in my C++ header file:
>> ...
>> class LocalResource
>>  {
>> public:
>>  LocalResource () : m_pResource (NULL) {}
>>  virtual ~LocalResource () {}
>>  ...
>>  };
>> typedef vector<LocalResource *>            LocalResources;
>> typedef Iterator<LocalResources::iterator>    LocalResourceIterator;
>> typedef shared_ptr<LocalResourceIterator>    LocalResourceIteratorSP;
>> ...
>>
>> I am able to instantiate an instance of LocalResource in Java, but I
>> am unable to instatiate an instance of LocalResourceIteratorSP.  It
>> seems that LocalResourceIteratorSP is not part of the SWIG output.  I
>> tried adding these lines to the input file:
>> %{
>> typedef vector<LocalResource *>            LocalResources;
>> typedef Iterator<LocalResources::iterator>    LocalResourceIterator;
>> typedef shared_ptr<LocalResourceIterator>    LocalResourceIteratorSP;
>> %}
>>
>> but all I get from that is an "undeclared identifier" error for
>> LocalResource when I try to compile my C++ file with the new _wrap file.
>>
>> Basically I am trying to mimic the following C++ sample code in Java.
>>  LocalResourceIteratorSP resIter = GetLocalResourceIterator ();
>>  while (resIter->IsDone () == false)
>>    {
>>    LocalResource *pLocalRes = resIter->Item ();
>>    LogItem ("  Name = %s", pLocalRes->GetName ().c_str ());
>>    LogItem ("    Description = %s", pLocalRes->GetDesc ().c_str ());
>>    LogItem ("    Type = %s", pLocalRes->GetType ().c_str ());
>>  
>>    resIter->MoveNext ();
>>    }
>>
>> Thanks!
>>
> An update on my situation.  I realized that  the reason I was getting
> "undeclared identifier" errors was because I didn't use the namespace in
> my typedef.
> I changed:
> %{
> typedef vector<LocalResource *>            LocalResources;
> typedef Iterator<LocalResources::iterator>    LocalResourceIterator;
> typedef shared_ptr<LocalResourceIterator>    LocalResourceIteratorSP;
> %}
> to
> %{
> typedef vector<*MpeApp::*LocalResource *>            LocalResources;
> typedef Iterator<LocalResources::iterator>    LocalResourceIterator;
> typedef shared_ptr<LocalResourceIterator>    LocalResourceIteratorSP;
> %}
> and that got rid of the errors and my C++ app compiles now.
> 
> However, I still can't instantiate LocalResourceIteratorSP from Java, so
> any help on that would be greatly appreciated.  The whole C++ app hinges
> on this iterator concept so without it I'm dead in the water.
> 


You instantiate LocalResourceIteratorSP by calling
GetLocalResourceIterator() as you show - yes? Then just call this
method. Read up about SWIG's handling of smart pointers. I don't see any
%template in your code for the templated shared_ptr.

William