Loading a shared lib from generated java class

[Matt Lawson]

Hi,

This seems like such a simple thing, but I can't figure out how to specify it in the interface file.

I want to pass through some Java code verbatim from the interface file into a given generated java class.  The reason being, I want the swig-generated java class to load the .so shared library instead of having to do it in the end user application.

In other words, what I want it to spit out is this:

package libmyApi;
public class utils {
  ...

  static {
     System.loadLibrary("myApi");
  }

  protected utils(long cPtr, boolean cMemoryOwn) ...


When I manually insert the loadLibrary into the swig-generated file like this, it seems to work... the question is, how can I get swig to spit it out this way?

I can't figure out how to add the "static" initialization section.  I have tried many, many combinations of %init, %inline, %extend, etc... but no luck.  Any ideas?  TIA.


     

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[Alan Woodland-5]

2009/10/23 false <lawson08@...>:

> Hi,
>
> This seems like such a simple thing, but I can't figure out how to specify it in the interface file.
>
> I want to pass through some Java code verbatim from the interface file into a given generated java class.  The reason being, I want the swig-generated java class to load the .so shared library instead of having to do it in the end user application.
>
> In other words, what I want it to spit out is this:
>
> package libmyApi;
> public class utils {
>  ...
>
>  static {
>     System.loadLibrary("myApi");
>  }
>
>  protected utils(long cPtr, boolean cMemoryOwn) ...
>
>
> When I manually insert the loadLibrary into the swig-generated file like this, it seems to work... the question is, how can I get swig to spit it out this way?
>
> I can't figure out how to add the "static" initialization section.  I have tried many, many combinations of %init, %inline, %extend, etc... but no luck.  Any ideas?  TIA.

This:

%pragma(java) jniclasscode=%{
  static {
    try {
        System.loadLibrary("metrics");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load. \n" + e);
      System.exit(1);
    }
  }
%}

worked for me last time I used swig for java things...

Alan

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