/*
* Convert a Java object to a JSObject.
*/
static JSBool
convert_javaobject_to_jsobject(JSContext *cx, JNIEnv *jEnv,
JavaClassDescriptor *class_descriptor,
jobject java_obj, jsval *vp)
{
JSObject *js_obj;
/*
* If it's an instance of netscape.javascript.JSObject, i.e. a wrapper
* around a JS object that has been passed into the Java world, unwrap
* it to obtain the original JS object.
*/
if (njJSObject && (*jEnv)->IsInstanceOf(jEnv, java_obj, njJSObject)) {
#ifdef PRESERVE_JSOBJECT_IDENTITY
#if JS_BYTES_PER_LONG == 8
js_obj = (JSObject *)((*jEnv)->GetLongField(jEnv, java_obj, njJSObject_long_internal));
#else
js_obj = (JSObject *)((*jEnv)->GetIntField(jEnv, java_obj, njJSObject_internal));
#endif
#else
js_obj = jsj_UnwrapJSObjectWrapper(jEnv, java_obj);
#endif
} else {
/* otherwise, wrap it inside a JavaObject */
js_obj = jsj_WrapJavaObject(cx, jEnv, java_obj, class_descriptor->java_class);
if (!js_obj)
return JS_FALSE;
}
*vp = OBJECT_TO_JSVAL(js_obj);
return JS_TRUE;
}
/*
* Reflect a Java object into a JS value. The source object, java_obj, must
* be of type java.lang.Object or a subclass and may, therefore, be an array.
*/
JSBool
jsj_ConvertJavaObjectToJSValue(JSContext *cx, JNIEnv *jEnv,
jobject java_obj, jsval *vp)
{
jclass java_class;
JSObject *js_obj;
/* A null in Java-land is also null in JS */
if (!java_obj) {
*vp = JSVAL_NULL;
return JS_TRUE;
}
java_class = (*jEnv)->GetObjectClass(jEnv, java_obj);
/*
* If it's an instance of netscape.javascript.JSObject, i.e. a wrapper
* around a JS object that has been passed into the Java world, unwrap
* it to obtain the original JS object.
*/
if (njJSObject && (*jEnv)->IsInstanceOf(jEnv, java_obj, njJSObject)) {
#ifdef PRESERVE_JSOBJECT_IDENTITY
#if JS_BYTES_PER_LONG == 8
js_obj = (JSObject *)((*jEnv)->GetLongField(jEnv, java_obj, njJSObject_long_internal));
#else
js_obj = (JSObject *)((*jEnv)->GetIntField(jEnv, java_obj, njJSObject_internal));
#endif
#else
js_obj = jsj_UnwrapJSObjectWrapper(jEnv, java_obj);
#endif
/* NULL is actually a valid value. It means 'null'.
JS_ASSERT(js_obj);
if (!js_obj)
goto error;
*/
*vp = OBJECT_TO_JSVAL(js_obj);
goto done;
}
/* otherwise, wrap it inside a JavaObject */
js_obj = jsj_WrapJavaObject(cx, jEnv, java_obj, java_class);
if (!js_obj)
goto error;
*vp = OBJECT_TO_JSVAL(js_obj);
done:
(*jEnv)->DeleteLocalRef(jEnv, java_class);
return JS_TRUE;
error:
(*jEnv)->DeleteLocalRef(jEnv, java_class);
return JS_FALSE;
}
JNIEXPORT jboolean JNICALL
Java_netscape_javascript_JSObject_equals(JNIEnv *jEnv,
jobject java_wrapper_obj,
jobject comparison_obj)
{
#ifdef PRESERVE_JSOBJECT_IDENTITY
# error "Missing code should be added here"
#else
JSObject *js_obj1, *js_obj2;
/* Check that we're comparing with another netscape.javascript.JSObject */
if (!comparison_obj)
return 0;
if (!(*jEnv)->IsInstanceOf(jEnv, comparison_obj, njJSObject))
return 0;
js_obj1 = jsj_UnwrapJSObjectWrapper(jEnv, java_wrapper_obj);
js_obj2 = jsj_UnwrapJSObjectWrapper(jEnv, comparison_obj);
return (js_obj1 == js_obj2);
#endif /* PRESERVE_JSOBJECT_IDENTITY */
}
JSJavaThreadState *
jsj_enter_js(JNIEnv *jEnv, void* applet_obj, jobject java_wrapper_obj,
JSContext **cxp, JSObject **js_objp, JSErrorReporter *old_error_reporterp,
void **pNSIPrincipaArray, int numPrincipals, void *pNSISecurityContext)
{
JSContext *cx;
char *err_msg;
JSObject *js_obj;
JSJavaThreadState *jsj_env;
cx = NULL;
err_msg = NULL;
/* Invoke callback, presumably used to implement concurrency constraints */
if (JSJ_callbacks && JSJ_callbacks->enter_js_from_java) {
#ifdef OJI
if (!JSJ_callbacks->enter_js_from_java(jEnv, &err_msg, pNSIPrincipaArray, numPrincipals, pNSISecurityContext,applet_obj))
#else
if (!JSJ_callbacks->enter_js_from_java(jEnv, &err_msg))
#endif
goto entry_failure;
}
/* Check the JSObject pointer in the wrapper object. */
if (js_objp) {
#ifdef PRESERVE_JSOBJECT_IDENTITY
#if JS_BYTES_PER_LONG == 8
js_obj = (JSObject *)((*jEnv)->GetLongField(jEnv, java_wrapper_obj, njJSObject_long_internal));
#else
js_obj = (JSObject *)((*jEnv)->GetIntField(jEnv, java_wrapper_obj, njJSObject_internal));
#endif
#else /* !PRESERVE_JSOBJECT_IDENTITY */
js_obj = jsj_UnwrapJSObjectWrapper(jEnv, java_wrapper_obj);
#endif /* PRESERVE_JSOBJECT_IDENTITY */
JS_ASSERT(js_obj);
if (!js_obj)
goto error;
*js_objp = js_obj;
}
/* Get the per-thread state corresponding to the current Java thread */
jsj_env = jsj_MapJavaThreadToJSJavaThreadState(jEnv, &err_msg);
if (!jsj_env)
goto error;
/* Get the JSContext that we're supposed to use for this Java thread */
cx = jsj_env->cx;
if (!cx) {
/* We called spontaneously into JS from Java, rather than from JS into
Java and back into JS. Invoke a callback to obtain/create a
JSContext for us to use. */
if (JSJ_callbacks && JSJ_callbacks->map_jsj_thread_to_js_context) {
#ifdef OJI
cx = JSJ_callbacks->map_jsj_thread_to_js_context(jsj_env,
applet_obj,
jEnv, &err_msg);
#else
cx = JSJ_callbacks->map_jsj_thread_to_js_context(jsj_env,
jEnv, &err_msg);
#endif
if (!cx)
goto error;
} else {
err_msg = JS_smprintf("Unable to find/create JavaScript execution "
"context for JNI thread 0x%08x", jEnv);
goto error;
}
}
*cxp = cx;
/*
* Capture all JS error reports so that they can be thrown into the Java
* caller as an instance of netscape.javascript.JSException.
*/
*old_error_reporterp =
JS_SetErrorReporter(cx, capture_js_error_reports_for_java);
#ifdef JSJ_THREADSAFE
JS_BeginRequest(cx);
#endif
return jsj_env;
error:
/* Invoke callback, presumably used to implement concurrency constraints */
if (JSJ_callbacks && JSJ_callbacks->exit_js)
JSJ_callbacks->exit_js(jEnv, cx);
entry_failure:
if (err_msg) {
if (cx)
JS_ReportError(cx, err_msg);
else
jsj_LogError(err_msg);
free(err_msg);
}
return NULL;
}
/*
* This is a wrapper around JS_ReportError(), useful when an error condition
* is the result of a JVM failure or exception condition. It appends the
* message associated with the pending Java exception to the passed in
* printf-style format string and arguments.
*/
static void
vreport_java_error(JSContext *cx, JNIEnv *jEnv, const char *format, va_list ap)
{
jobject java_obj;
jclass java_class;
JavaClassDescriptor *class_descriptor;
jthrowable java_exception;
JSType wrapped_exception_type;
jsval js_exception;
java_obj = NULL;
class_descriptor = NULL;
/* Get the exception out of the java environment. */
java_exception = (*jEnv)->ExceptionOccurred(jEnv);
if (!java_exception) {
JSString *err_jsstr;
char *err = JS_vsmprintf(format, ap);
if (!err)
return;
err_jsstr = JS_NewString(cx, err, strlen(err));
if (!err_jsstr)
return;
JS_SetPendingException(cx, STRING_TO_JSVAL(err_jsstr));
return;
}
(*jEnv)->ExceptionClear(jEnv);
/* Check for JSException */
if (njJSException &&
(*jEnv)->IsInstanceOf(jEnv, java_exception, njJSException)) {
wrapped_exception_type =
(*jEnv)->GetIntField(jEnv, java_exception,
njJSException_wrappedExceptionType);
/* (int) to suppress warning */
if ((int)wrapped_exception_type != JSTYPE_EMPTY) {
java_obj =
(*jEnv)->GetObjectField(jEnv, java_exception,
njJSException_wrappedException);
if ((java_obj == NULL) &&
(wrapped_exception_type == JSTYPE_OBJECT)) {
js_exception = JSVAL_NULL;
} else {
java_class = (*jEnv)->GetObjectClass(jEnv, java_obj);
class_descriptor = jsj_GetJavaClassDescriptor(cx, jEnv, java_class);
/* OK to delete ref, since above call adds global ref */
(*jEnv)->DeleteLocalRef(jEnv, java_class);
/* Convert native JS values back to native types. */
switch(wrapped_exception_type) {
case JSTYPE_NUMBER:
if (!jsj_ConvertJavaObjectToJSNumber(cx, jEnv,
class_descriptor,
java_obj,
&js_exception))
goto error;
break;
case JSTYPE_BOOLEAN:
if (!jsj_ConvertJavaObjectToJSBoolean(cx, jEnv,
class_descriptor,
java_obj,
&js_exception))
goto error;
break;
case JSTYPE_STRING:
if (!jsj_ConvertJavaObjectToJSString(cx, jEnv,
class_descriptor,
java_obj,
&js_exception))
goto error;
break;
case JSTYPE_VOID:
js_exception = JSVAL_VOID;
break;
case JSTYPE_OBJECT:
case JSTYPE_FUNCTION:
default:
if ((*jEnv)->IsInstanceOf(jEnv, java_obj, njJSObject)) {
js_exception = OBJECT_TO_JSVAL(jsj_UnwrapJSObjectWrapper(jEnv, java_obj));
if (!js_exception)
goto error;
} else {
if (!jsj_ConvertJavaObjectToJSValue(cx, jEnv, java_obj,
&js_exception))
goto error;
}
}
}
}
/* Check for internal exception */
} else {
if (!JSJ_ConvertJavaObjectToJSValue(cx, java_exception,
&js_exception)) {
goto error;
}
}
/* Set pending JS exception and clear the java exception. */
JS_SetPendingException(cx, js_exception);
goto done;
error:
JS_ASSERT(0);
jsj_LogError("Out of memory while attempting to throw JSException\n");
done:
if (class_descriptor)
jsj_ReleaseJavaClassDescriptor(cx, jEnv, class_descriptor);
if (java_obj)
(*jEnv)->DeleteLocalRef(jEnv, java_obj);
if (java_exception)
(*jEnv)->DeleteLocalRef(jEnv, java_exception);
}