Re: [Swig-user] Swigging boost::shared_ptr

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

ami...@us... wrote:
> 
> Hi
> I'm trying to swig some C++ into java. The C++ code boost::shared_ptr 
> extensively. I included "boost_shared_ptr.i" in my interface file and 
> defined the template directives to generate the java code:
> 
> %include "boost_shared_ptr.i"
> %template (MyCppClassPtr) boost::shared_ptr<MyCppClass>;
> 
> This seems to work, as it generates java MyCppClass and MyCppClassPtr 
> classes.
> 
> But when I look at the generated code in MyCppClassPtr there is no way 
> for me to publicly assign an instance of MyCppClass to it.  The 
> generated java looks like this:
> 
> public class MyCppClassPtr {
>   private long swigCPtr;
>   protected boolean swigCMemOwn;
> 
>   protected MyCppClassPtr(long cPtr, boolean cMemoryOwn) {...}
> 
>   protected static long getCPtr(MyCppClassPtr obj) { ... }
> 
>   protected void finalize() { ... }
> 
>   public synchronized void delete() { ... }
> 
>   public MyCppClassPtr() { ... }
> 
> }
> 

You need to use the SWIG_SHARED_PTR or SWIG_SHARED_PTR_DERIVED macro 
instead of %template. See the notes dated 02/09/2008 in the CHANGES 
file. Although this is for Python, it applies for Java and C# too.

William