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Obtaining Java References

In some cases, you may need to access the actual Java objects used in a session, rather than the encapsulated objects passed by the embedding application. For example, if you wanted to call a method contained in an instantiated frame, you would need a reference to the actual Java frame, not the JMFrameRef object. Table 1-2 lists the functions you can use to return Java references. These functions all return a pointer of type jobject .

The first four functions return the jobject equivalents of the corresponding JManager objects. For example, JMGetSessionJNIObject returns the equivalent of the JMSessionRef reference. JMGetAppletJNIObject and JMGetAWTFrameJNIObject , however, return references to their actual Java objects.

You can use these references directly if you are accessing the Java Native Interface (JNI), but if you need to access the Java Runtime Interface (JRI), you must convert references of type jobject to ones of type jref using the JMJNIObjectToJRIRef function JMJNIObjectToJRIRef. To convert references of type jref to type jobject , use The JMJRIRefToJNIObject function.

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