[news.eclipse.platform.swt] JNIGenerator problem

["L. Mihalkovic" <totolaricot@xxxxxxx>]

I am trying to map the Carbon HIViewImageContentInfo struct for SWT 
(yes, I did figure how to declare a struct that contains a union by 
looking at other examples): as far as I can tell by looking at the C 
generated the union capability is actually lost (the ability to choose 
at runtime which field I want to set).

I looked at pretty much all the other carbon structures that contain 
unions, and in all cases, the SWT code has made a choice of using only 
one of the members of the union via

for example:

struct DataBrowserAccessibilityItemInfo {

 /*
  * A UInt32 which identifies how to interpret the following union.
  * Set this field to zero if you fill out the union's data in the
  * form of a DataBrowserAccessibilityItemInfoV0 structure. Set this
  * field to one if you fill out the union's data in the form of a
  * DataBrowserAccessibilityItemInfoV1 structure.
  */
 UInt32              version;
 union {
   DataBrowserAccessibilityItemInfoV0  v0;
   DataBrowserAccessibilityItemInfoV1  v1;
 }                       u;
};

The mapping only provides access via v0 and access via the v1 definition 
is lost. what if I want to be able to do

browserInfo.u.v1.xxxx = ssss

Am I missing something obvious?! (for now I did the same and mapped only 
one of the fields knowing that the actual values would endup looking 
right to Mac OS, but that does not strike me a legible code).



--
Laurent Mihalkovic, co-author SWT/JFace in Action (www.manning.com/scarpino)