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Directors implementation contributed by Scott Michel.

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git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@5074 626c5289-ae23-0410-ae9c-e8d60b6d4f22
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William S Fulton 2003-09-04 23:12:20 +00:00
commit 029cd11a67
7 changed files with 505 additions and 63 deletions
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SWIG/Lib/java/director.swg Normal file
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/***********************************************************************
* director.swg
*
* This file contains support for director classes that proxy
* method calls from C++ to Java extensions.
*
* Author : Scott Michel (scottm@aero.org)
*
* N.B.: This file was
adapted from the python director.swg, written by
* Mark Rose (mrose@stm.lbl.gov)
************************************************************************/
#ifdef __cplusplus
/* director base class */
class __DIRECTOR__ {
private:
/* pointer to java virtual machine */
JavaVM *__jvm;
protected:
/* pointer to the wrapped java object */
jobject __self;
/* ricochet flag: Prevent user from shooting themselves in the
foot by detecting recursive upcall */
bool __ricochet;
/* Acquire Java VM environment from Java VM */
JNIEnv *__acquire_jenv() const {
JNIEnv *env;
assert(__jvm);
__jvm->AttachCurrentThread((void **) &env, NULL);
return env;
}
public:
/* the default constructor should not be called */
__DIRECTOR__() : __jvm(NULL), __self(NULL), __ricochet(false) {
assert(0);
}
/* Default constructor */
__DIRECTOR__(JNIEnv *jenv):
__jvm((JavaVM *) NULL),
__self(NULL),
__ricochet(false)
{
/* Acquire the Java VM pointer */
jenv->GetJavaVM(&__jvm);
}
/* Remove the Java object global lock at destruction */
virtual ~__DIRECTOR__()
{
if (__self) {
JNIEnv *jenv;
jenv = __acquire_jenv();
jenv->DeleteGlobalRef(__self);
__self = (jobject) NULL;
}
}
/* Set __self and get Java global reference on object */
inline void __set_self(JNIEnv *jenv, jobject jself)
{
__self = jenv->NewGlobalRef(jself);
}
/* return a pointer to the wrapped java object */
inline jobject __get_self() const
{ return __self; }
/* Get ricochet flag, resetting it on the way out */
inline bool __get_ricochet()
{
bool __r = __ricochet;
__ricochet = false;
return __r;
}
/* Set the ricochet flag */
inline void __set_ricochet()
{ __ricochet = true; }
/* Clear the ricochet flag */
inline void __clear_ricochet()
{ __ricochet = false; }
};
#endif /* __cplusplus */