JNIEXPORT jobject JNICALL
awt_GetComponent(JNIEnv* env, void* platformInfo)
{
Window window = (Window)platformInfo;
jobject peer = NULL;
jobject target = NULL;
AWT_LOCK();
if (window != None) {
peer = JNU_CallStaticMethodByName(env, NULL, "sun/awt/X11/XToolkit",
"windowToXWindow", "(J)Lsun/awt/X11/XBaseWindow;", (jlong)window).l;
}
if ((peer != NULL) &&
(JNU_IsInstanceOfByName(env, peer, "sun/awt/X11/XWindow") == 1)) {
target = (*env)->GetObjectField(env, peer, targetID);
}
if (target == NULL) {
JNU_ThrowNullPointerException(env, "NullPointerException");
AWT_UNLOCK();
return (jobject)NULL;
}
AWT_UNLOCK();
return target;
}
// This function is called instead of ExceptionOccurred. It throws
// std::bad_alloc if a java.lang.OutOfMemoryError is currently pending
// on the calling thread.
jthrowable
safe_ExceptionOccurred(JNIEnv *env) throw (std::bad_alloc) {
jthrowable xcp = env->ExceptionOccurred();
if (xcp != NULL) {
env->ExceptionClear(); // if we don't do this, isInstanceOf will fail
jint isOutofmem = JNU_IsInstanceOfByName(env, xcp, "java/lang/OutOfMemoryError");
if (isOutofmem > 0) {
env->DeleteLocalRef(xcp);
throw std::bad_alloc();
} else {
env->ExceptionClear();
// rethrow exception
env->Throw(xcp);
return xcp;
}
}
return NULL;
}
