/**
* set member of a Native JSObject for a given index.
*
* @param jEnv - JNIEnv on which the call is being made.
* @param obj - A Native JS Object.
* @param index - Index of a member.
* @param jobj - Value to set. If this is a basic data type, it is converted
* using standard JNI calls but if it is a wrapper to a JSObject
* then a internal mapping is consulted to convert to a NJSObject.
*/
NS_METHOD
nsCLiveconnect::SetSlot(JNIEnv *jEnv, lcjsobject obj, jint slot, jobject java_obj, void* principalsArray[],
int numPrincipals, nsISupports *securitySupports)
{
if(jEnv == NULL || obj == 0)
{
return NS_ERROR_FAILURE;
}
JSJavaThreadState *jsj_env = NULL;
JSObjectHandle *handle = (JSObjectHandle*)obj;
JSObject *js_obj = handle->js_obj;
JSContext *cx = NULL;
jsval js_val;
JSErrorReporter saved_state = NULL;
jsj_env = jsj_enter_js(jEnv, mJavaClient, NULL, &cx, NULL, &saved_state, principalsArray, numPrincipals, securitySupports);
if (!jsj_env)
return NS_ERROR_FAILURE;
AutoPushJSContext autopush(securitySupports, cx);
if (NS_FAILED(autopush.ResultOfPush()))
goto done;
if (!jsj_ConvertJavaObjectToJSValue(cx, jEnv, java_obj, &js_val))
goto done;
JS_SetElement(cx, js_obj, slot, &js_val);
done:
jsj_exit_js(cx, jsj_env, saved_state);
return NS_OK;
}
/*
* Convert a Java value (primitive or object) to a JS value.
*
* This is usually an infallible operation, but JS_FALSE is returned
* on an out-of-memory condition and the error reporter is called.
*/
JSBool
jsj_ConvertJavaValueToJSValue(JSContext *cx, JNIEnv *jEnv,
JavaSignature *signature,
jvalue *java_value,
jsval *vp)
{
int32 ival32;
switch (signature->type) {
case JAVA_SIGNATURE_VOID:
*vp = JSVAL_VOID;
return JS_TRUE;
case JAVA_SIGNATURE_BYTE:
*vp = INT_TO_JSVAL((jsint)java_value->b);
return JS_TRUE;
case JAVA_SIGNATURE_CHAR:
*vp = INT_TO_JSVAL((jsint)java_value->c);
return JS_TRUE;
case JAVA_SIGNATURE_SHORT:
*vp = INT_TO_JSVAL((jsint)java_value->s);
return JS_TRUE;
case JAVA_SIGNATURE_INT:
ival32 = java_value->i;
if (INT_FITS_IN_JSVAL(ival32)) {
*vp = INT_TO_JSVAL((jsint) ival32);
return JS_TRUE;
} else {
return JS_NewDoubleValue(cx, ival32, vp);
}
case JAVA_SIGNATURE_BOOLEAN:
*vp = BOOLEAN_TO_JSVAL((JSBool) java_value->z);
return JS_TRUE;
case JAVA_SIGNATURE_LONG:
return JS_NewDoubleValue(cx, jlong_to_jdouble(java_value->j), vp);
case JAVA_SIGNATURE_FLOAT:
return JS_NewDoubleValue(cx, java_value->f, vp);
case JAVA_SIGNATURE_DOUBLE:
return JS_NewDoubleValue(cx, java_value->d, vp);
case JAVA_SIGNATURE_UNKNOWN:
JS_ASSERT(0);
return JS_FALSE;
/* Non-primitive (reference) type */
default:
JS_ASSERT(IS_REFERENCE_TYPE(signature->type));
return jsj_ConvertJavaObjectToJSValue(cx, jEnv, java_value->l, vp);
}
}
/* Utility routine to wrap a Java object inside a JS object, having a
a result type of either JavaObject or JavaArray. */
JSBool
JSJ_ConvertJavaObjectToJSValue(JSContext *cx, jobject java_obj, jsval *vp)
{
JNIEnv *jEnv;
JSBool result;
JSJavaThreadState *jsj_env;
/* Get the Java per-thread environment pointer for this JSContext */
jsj_env = jsj_EnterJava(cx, &jEnv);
if (!jEnv)
return JS_FALSE;
result = jsj_ConvertJavaObjectToJSValue(cx, jEnv, java_obj, vp);
jsj_ExitJava(jsj_env);
return result;
}
/*
* Class: netscape_javascript_JSObject
* Method: setMember
* Signature: (Ljava/lang/String;Ljava/lang/Object;)V
*/
JNIEXPORT void JNICALL
Java_netscape_javascript_JSObject_setMember(JNIEnv *jEnv,
jobject java_wrapper_obj,
jstring property_name_jstr,
jobject java_obj)
{
JSContext *cx = NULL;
JSObject *js_obj;
jsval js_val;
const jchar *property_name_ucs2;
jsize property_name_len;
JSErrorReporter saved_reporter;
jboolean is_copy;
JSJavaThreadState *jsj_env;
jsj_env = jsj_enter_js(jEnv, NULL, java_wrapper_obj, &cx, &js_obj, &saved_reporter, NULL, 0, NULL);
if (!jsj_env)
return;
property_name_ucs2 = NULL;
if (!property_name_jstr) {
JS_ReportErrorNumber(cx, jsj_GetErrorMessage, NULL,
JSJMSG_NULL_MEMBER_NAME);
goto done;
}
/* Get the Unicode string for the JS property name */
property_name_ucs2 = (*jEnv)->GetStringChars(jEnv, property_name_jstr, &is_copy);
if (!property_name_ucs2) {
JS_ASSERT(0);
goto done;
}
property_name_len = (*jEnv)->GetStringLength(jEnv, property_name_jstr);
if (!jsj_ConvertJavaObjectToJSValue(cx, jEnv, java_obj, &js_val))
goto done;
JS_SetUCProperty(cx, js_obj, property_name_ucs2, property_name_len, &js_val);
done:
if (property_name_ucs2)
(*jEnv)->ReleaseStringChars(jEnv, property_name_jstr, property_name_ucs2);
jsj_exit_js(cx, jsj_env, saved_reporter);
}
/**
* set member of a Native JSObject for a given name.
*
* @param jEnv - JNIEnv on which the call is being made.
* @param obj - A Native JS Object.
* @param name - Name of a member.
* @param jobj - Value to set. If this is a basic data type, it is converted
* using standard JNI calls but if it is a wrapper to a JSObject
* then a internal mapping is consulted to convert to a NJSObject.
*/
NS_METHOD
nsCLiveconnect::SetMember(JNIEnv *jEnv, lcjsobject obj, const jchar *name, jsize length, jobject java_obj, void* principalsArray[],
int numPrincipals, nsISupports *securitySupports)
{
if(jEnv == NULL || obj == 0)
{
return NS_ERROR_FAILURE;
}
JSJavaThreadState *jsj_env = NULL;
JSObjectHandle *handle = (JSObjectHandle*)obj;
JSObject *js_obj = handle->js_obj;
JSContext *cx = NULL;
jsval js_val;
JSErrorReporter saved_state = NULL;
jsj_env = jsj_enter_js(jEnv, mJavaClient, NULL, &cx, NULL, &saved_state, principalsArray, numPrincipals, securitySupports);
if (!jsj_env)
return NS_ERROR_FAILURE;
AutoPushJSContext autopush(securitySupports, cx);
if (NS_FAILED(autopush.ResultOfPush()))
goto done;
if (!name) {
JS_ReportError(cx, "illegal null member name");
goto done;
}
if (!jsj_ConvertJavaObjectToJSValue(cx, jEnv, java_obj, &js_val))
goto done;
JS_SetUCProperty(cx, js_obj, name, length, &js_val);
done:
jsj_exit_js(cx, jsj_env, saved_state);
return NS_OK;
}
/*
* Class: netscape_javascript_JSObject
* Method: setSlot
* Signature: (ILjava/lang/Object;)V
*/
JNIEXPORT void JNICALL
Java_netscape_javascript_JSObject_setSlot(JNIEnv *jEnv,
jobject java_wrapper_obj,
jint slot,
jobject java_obj)
{
JSContext *cx = NULL;
JSObject *js_obj;
jsval js_val;
JSErrorReporter saved_reporter;
JSJavaThreadState *jsj_env;
jsj_env = jsj_enter_js(jEnv, NULL, java_wrapper_obj, &cx, &js_obj, &saved_reporter, NULL, 0, NULL);
if (!jsj_env)
return;
if (!jsj_ConvertJavaObjectToJSValue(cx, jEnv, java_obj, &js_val))
goto done;
JS_SetElement(cx, js_obj, slot, &js_val);
done:
jsj_exit_js(cx, jsj_env, saved_reporter);
}
/*
* Class: netscape_javascript_JSObject
* Method: call
* Signature: (Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/Object;
*/
JNIEXPORT jobject JNICALL
Java_netscape_javascript_JSObject_call(JNIEnv *jEnv, jobject java_wrapper_obj,
jstring function_name_jstr, jobjectArray java_args)
{
int i, argc, arg_num;
jsval *argv;
JSContext *cx = NULL;
JSObject *js_obj;
jsval js_val, function_val;
int dummy_cost;
JSBool dummy_bool;
const jchar *function_name_ucs2;
jsize function_name_len;
JSErrorReporter saved_reporter;
jboolean is_copy;
jobject result;
JSJavaThreadState *jsj_env;
jsj_env = jsj_enter_js(jEnv, NULL, java_wrapper_obj, &cx, &js_obj, &saved_reporter, NULL, 0, NULL);
if (!jsj_env)
return NULL;
function_name_ucs2 = NULL;
result = NULL;
if (!function_name_jstr) {
JS_ReportErrorNumber(cx, jsj_GetErrorMessage, NULL,
JSJMSG_NULL_FUNCTION_NAME);
goto done;
}
/* Get the function name to eval as raw Unicode characters */
function_name_ucs2 = (*jEnv)->GetStringChars(jEnv, function_name_jstr, &is_copy);
if (!function_name_ucs2) {
JS_ASSERT(0);
goto done;
}
function_name_len = (*jEnv)->GetStringLength(jEnv, function_name_jstr);
/* Allocate space for JS arguments */
if (java_args) {
argc = (*jEnv)->GetArrayLength(jEnv, java_args);
argv = (jsval*)JS_malloc(cx, argc * sizeof(jsval));
} else {
argc = 0;
argv = 0;
}
/* Convert arguments from Java to JS values */
for (arg_num = 0; arg_num < argc; arg_num++) {
jobject arg = (*jEnv)->GetObjectArrayElement(jEnv, java_args, arg_num);
if (!jsj_ConvertJavaObjectToJSValue(cx, jEnv, arg, &argv[arg_num]))
goto cleanup_argv;
JS_AddNamedRoot(cx, &argv[arg_num], "&argv[arg_num]");
}
if (!JS_GetUCProperty(cx, js_obj, function_name_ucs2, function_name_len,
&function_val))
goto cleanup_argv;
if (!JS_CallFunctionValue(cx, js_obj, function_val, argc, argv, &js_val))
goto cleanup_argv;
jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, jsj_get_jlObject_descriptor(cx, jEnv),
&dummy_cost, &result, &dummy_bool);
cleanup_argv:
if (argv) {
for (i = 0; i < arg_num; i++)
JS_RemoveRoot(cx, &argv[i]);
JS_free(cx, argv);
}
done:
if (function_name_ucs2)
(*jEnv)->ReleaseStringChars(jEnv, function_name_jstr, function_name_ucs2);
if (!jsj_exit_js(cx, jsj_env, saved_reporter))
return NULL;
return result;
}
/*
* 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);
}
/*
* Read the value of a Java field and return it as a JavaScript value.
* If the field is static, then java_obj is a Java class, otherwise
* it's a Java instance object.
*
* Returns JS_TRUE on success. Otherwise, returns JS_FALSE and reports an error.
*/
JSBool
jsj_GetJavaFieldValue(JSContext *cx, JNIEnv *jEnv, JavaFieldSpec *field_spec,
jobject java_obj, jsval *vp)
{
JSBool is_static_field, success;
jvalue java_value;
JavaSignature *signature;
JavaSignatureChar field_type;
jfieldID fieldID = field_spec->fieldID;
is_static_field = field_spec->modifiers & ACC_STATIC;
#define GET_JAVA_FIELD(Type,member) \
JS_BEGIN_MACRO \
if (is_static_field) \
java_value.member = \
(*jEnv)->GetStatic##Type##Field(jEnv, (*jEnv)->GetObjectClass(jEnv, java_obj), fieldID); \
else \
java_value.member = \
(*jEnv)->Get##Type##Field(jEnv, java_obj, fieldID); \
if ((*jEnv)->ExceptionOccurred(jEnv)) { \
jsj_UnexpectedJavaError(cx, jEnv, "Error reading Java field"); \
return JS_FALSE; \
} \
JS_END_MACRO
signature = field_spec->signature;
field_type = signature->type;
switch(field_type) {
case JAVA_SIGNATURE_BYTE:
GET_JAVA_FIELD(Byte,b);
break;
case JAVA_SIGNATURE_CHAR:
GET_JAVA_FIELD(Char,c);
break;
case JAVA_SIGNATURE_SHORT:
GET_JAVA_FIELD(Short,s);
break;
case JAVA_SIGNATURE_INT:
GET_JAVA_FIELD(Int,i);
break;
case JAVA_SIGNATURE_BOOLEAN:
GET_JAVA_FIELD(Boolean,z);
break;
case JAVA_SIGNATURE_LONG:
GET_JAVA_FIELD(Long,j);
break;
case JAVA_SIGNATURE_FLOAT:
GET_JAVA_FIELD(Float,f);
break;
case JAVA_SIGNATURE_DOUBLE:
GET_JAVA_FIELD(Double,d);
break;
case JAVA_SIGNATURE_UNKNOWN:
case JAVA_SIGNATURE_VOID:
JS_ASSERT(0); /* Unknown java type signature */
return JS_FALSE;
/* Non-primitive (reference) type */
default:
JS_ASSERT(IS_REFERENCE_TYPE(field_type));
GET_JAVA_FIELD(Object,l);
success = jsj_ConvertJavaObjectToJSValue(cx, jEnv, java_value.l, vp);
(*jEnv)->DeleteLocalRef(jEnv, java_value.l);
return success;
}
#undef GET_JAVA_FIELD
return jsj_ConvertJavaValueToJSValue(cx, jEnv, signature, &java_value, vp);
}
/**
* call a method of Native JSObject.
*
* @param jEnv - JNIEnv on which the call is being made.
* @param obj - A Native JS Object.
* @param name - Name of a method.
* @param jobjArr - Array of jobjects representing parameters of method being caled.
* @param pjobj - return value.
*/
NS_METHOD
nsCLiveconnect::Call(JNIEnv *jEnv, lcjsobject obj, const jchar *name, jsize length, jobjectArray java_args, void* principalsArray[],
int numPrincipals, nsISupports *securitySupports, jobject *pjobj)
{
if(jEnv == NULL || obj == 0)
{
return NS_ERROR_FAILURE;
}
int i = 0;
int argc = 0;
int arg_num = 0;
jsval *argv = 0;
JSJavaThreadState *jsj_env = NULL;
JSObjectHandle *handle = (JSObjectHandle*)obj;
JSObject *js_obj = handle->js_obj;
JSContext *cx = NULL;
jsval js_val;
jsval function_val = 0;
int dummy_cost = 0;
JSBool dummy_bool = PR_FALSE;
JSErrorReporter saved_state = NULL;
jobject result = NULL;
jsj_env = jsj_enter_js(jEnv, mJavaClient, NULL, &cx, NULL, &saved_state, principalsArray, numPrincipals, securitySupports);
if (!jsj_env)
return NS_ERROR_FAILURE;
result = NULL;
AutoPushJSContext autopush(securitySupports, cx);
if (NS_FAILED(autopush.ResultOfPush()))
goto done;
if (!name) {
JS_ReportError(cx, "illegal null JavaScript function name");
goto done;
}
/* Allocate space for JS arguments */
argc = java_args ? jEnv->GetArrayLength(java_args) : 0;
if (argc) {
argv = (jsval*)JS_malloc(cx, argc * sizeof(jsval));
if (!argv)
goto done;
} else {
argv = 0;
}
/* Convert arguments from Java to JS values */
for (arg_num = 0; arg_num < argc; arg_num++) {
jobject arg = jEnv->GetObjectArrayElement(java_args, arg_num);
JSBool ret = jsj_ConvertJavaObjectToJSValue(cx, jEnv, arg, &argv[arg_num]);
jEnv->DeleteLocalRef(arg);
if (!ret)
goto cleanup_argv;
JS_AddRoot(cx, &argv[arg_num]);
}
if (!JS_GetUCProperty(cx, js_obj, name, length, &function_val))
goto cleanup_argv;
if (!JS_CallFunctionValue(cx, js_obj, function_val, argc, argv, &js_val))
goto cleanup_argv;
jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, jsj_get_jlObject_descriptor(cx, jEnv),
&dummy_cost, &result, &dummy_bool);
cleanup_argv:
if (argv) {
for (i = 0; i < arg_num; i++)
JS_RemoveRoot(cx, &argv[i]);
JS_free(cx, argv);
}
done:
if (!jsj_exit_js(cx, jsj_env, saved_state))
return NS_ERROR_FAILURE;
*pjobj = result;
return NS_OK;
}
