コード例 #1
0
ファイル: jsj_JSObject.c プロジェクト: chemeris/sipxecs
/*
 * Class:     netscape_javascript_JSObject
 * Method:    getSlot
 * Signature: (I)Ljava/lang/Object;
 */
JNIEXPORT jobject JNICALL
Java_netscape_javascript_JSObject_getSlot(JNIEnv *jEnv,
                                          jobject java_wrapper_obj,
                                          jint slot)
{
    JSContext *cx = NULL;
    JSObject *js_obj;
    jsval js_val;
    int dummy_cost;
    JSBool dummy_bool;
    JSErrorReporter saved_reporter;
    jobject member;
    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;
    

    if (!JS_GetElement(cx, js_obj, slot, &js_val))
        goto done;
    if (!jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, jsj_get_jlObject_descriptor(cx, jEnv),
                                        &dummy_cost, &member, &dummy_bool))
        goto done;

done:
    if (!jsj_exit_js(cx, jsj_env, saved_reporter))
        return NULL;
    
    return member;
}
コード例 #2
0
ファイル: jsj_JSObject.c プロジェクト: chemeris/sipxecs
/*
 * Class:     netscape_javascript_JSObject
 * Method:    getMember
 * Signature: (Ljava/lang/String;)Ljava/lang/Object;
 */
JNIEXPORT jobject JNICALL
Java_netscape_javascript_JSObject_getMember(JNIEnv *jEnv,
                                            jobject java_wrapper_obj,
                                            jstring property_name_jstr)
{
    JSContext *cx = NULL;
    JSObject *js_obj;
    jsval js_val;
    int dummy_cost;
    JSBool dummy_bool;
    const jchar *property_name_ucs2;
    jsize property_name_len;
    JSErrorReporter saved_reporter;
    jobject member;
    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 NULL;

    property_name_ucs2 = NULL;
    if (!property_name_jstr) {
        JS_ReportErrorNumber(cx, jsj_GetErrorMessage, NULL,
                             JSJMSG_NULL_MEMBER_NAME);
        member = NULL;
        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 (!JS_GetUCProperty(cx, js_obj, property_name_ucs2, property_name_len, &js_val))
        goto done;

    jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, 
                                   jsj_get_jlObject_descriptor(cx, jEnv),
                                   &dummy_cost, &member, &dummy_bool);

done:
    if (property_name_ucs2)
        (*jEnv)->ReleaseStringChars(jEnv, property_name_jstr, property_name_ucs2);
    if (!jsj_exit_js(cx, jsj_env, saved_reporter))
        return NULL;
    
    return member;
}
コード例 #3
0
ファイル: nsCLiveconnect.cpp プロジェクト: ahadzi/celtx
/**
 * get 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 pjobj      - return parameter as a java object representing 
 *                     the member. 
 */
NS_METHOD	
nsCLiveconnect::GetSlot(JNIEnv *jEnv, lcjsobject obj, jint slot, void* principalsArray[], 
                     int numPrincipals, nsISupports *securitySupports,  jobject *pjobj)
{
    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;
    jobject            member         = NULL;
    jsval              js_val;
    int                dummy_cost     = 0;
    JSBool             dummy_bool     = PR_FALSE;
    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;
    
    // =-= sudu: check to see if slot can be passed in as is.
    //           Should it be converted to a jsint?
    if (!JS_GetElement(cx, js_obj, slot, &js_val))
        goto done;
    if (!jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, jsj_get_jlObject_descriptor(cx, jEnv),
                                        &dummy_cost, &member, &dummy_bool))
        goto done;

done:
    if (!jsj_exit_js(cx, jsj_env, saved_state))
       return NS_ERROR_FAILURE;
    
    *pjobj = member;
    return NS_OK;
}
コード例 #4
0
ファイル: jsj_JSObject.c プロジェクト: chemeris/sipxecs
/*
 * Class:     netscape_javascript_JSObject
 * Method:    getWindow
 * Signature: (Ljava/applet/Applet;)Lnetscape/javascript/JSObject;
 */
JNIEXPORT jobject JNICALL
Java_netscape_javascript_JSObject_getWindow(JNIEnv *jEnv,
                                            jclass js_object_class,
                                            jobject java_applet_obj)
{
    char *err_msg;
    JSContext *cx = NULL;
    JSObject *js_obj = NULL;
    jsval js_val;
    int dummy_cost;
    JSBool dummy_bool;
    JSErrorReporter saved_reporter;
    jobject java_obj;
    JSJavaThreadState *jsj_env;
    
    jsj_env = jsj_enter_js(jEnv, java_applet_obj, NULL, &cx, NULL, &saved_reporter, NULL, 0, NULL);
    if (!jsj_env)
        return NULL;
    
    err_msg = NULL;
    java_obj = NULL;
    if (JSJ_callbacks && JSJ_callbacks->map_java_object_to_js_object)
        js_obj = JSJ_callbacks->map_java_object_to_js_object(jEnv, java_applet_obj, &err_msg);
    if (!js_obj) {
        if (err_msg) {
            JS_ReportError(cx, err_msg);
            free(err_msg);
        }
        goto done;
    }
    js_val = OBJECT_TO_JSVAL(js_obj);
    jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, jsj_get_jlObject_descriptor(cx, jEnv),
                                   &dummy_cost, &java_obj, &dummy_bool);
done:
    if (!jsj_exit_js(cx, jsj_env, saved_reporter))
        return NULL;
    
    return java_obj;
}
コード例 #5
0
ファイル: jsj_JSObject.c プロジェクト: chemeris/sipxecs
/*
 * This is called upon returning from JS back into Java.  Any JS errors
 * reported during that time will be converted into Java exceptions.  It's
 * possible that a JS error was actually triggered by Java at some point, in
 * which case the original Java exception is thrown.
 */
static void
throw_any_pending_js_error_as_a_java_exception(JSJavaThreadState *jsj_env)
{
    CapturedJSError *error;
    JNIEnv *jEnv;
    jstring message_jstr, linebuf_jstr, filename_jstr;
    jint index, lineno;
    JSErrorReport *report;
    JSContext *cx;
    jsval pending_exception; 
    jobject java_obj;
    int dummy_cost;
    JSBool is_local_refp;
    JSType primitive_type;
    jthrowable java_exception;

    message_jstr = linebuf_jstr = filename_jstr = java_exception = NULL;

    /* Get the Java JNI environment */
    jEnv = jsj_env->jEnv;

    cx = jsj_env->cx;
    /* Get the pending JS exception if it exists */
    if (cx&&JS_IsExceptionPending(cx)) {
        if (!JS_GetPendingException(cx, &pending_exception))
            goto out_of_memory;

        /* Find out the JSTYPE of this jsval. */
        primitive_type = JS_TypeOfValue(cx, pending_exception);
        
        /* Convert jsval exception to a java object and then use it to
           create an instance of JSException. */ 
        if (!jsj_ConvertJSValueToJavaObject(cx, jEnv, 
                                            pending_exception, 
                                            jsj_get_jlObject_descriptor(cx, jEnv),
                                            &dummy_cost, &java_obj, 
                                            &is_local_refp))
            goto done;
        
        java_exception = (*jEnv)->NewObject(jEnv, njJSException, 
                                            njJSException_JSException_wrap,
                                            primitive_type, java_obj);
        if (is_local_refp)
            (*jEnv)->DeleteLocalRef(jEnv, java_obj);
        if (!java_exception) 
            goto out_of_memory;
        
        /* Throw the newly-created JSException */
        if ((*jEnv)->Throw(jEnv, java_exception) < 0) {
            JS_ASSERT(0);
            jsj_LogError("Couldn't throw JSException\n");
            goto done;
        }    
        JS_ClearPendingException(cx);
        return;
    }
    if (!jsj_env->pending_js_errors) {
#ifdef DEBUG
        /* Any exception should be cleared as soon as it's detected, so there
           shouldn't be any pending. */
        if ((*jEnv)->ExceptionOccurred(jEnv)) {
            /* A Java exception occurred, but nobody in JS-land noticed. */
            JS_ASSERT(0);
            (*jEnv)->ExceptionClear(jEnv);
        }
#endif
        return;
    }

    /* Get the deepest (oldest) saved JS error */
    /* XXX - What's the right thing to do about newer errors ?
       For now we just throw them away */
    error = jsj_env->pending_js_errors;
    while (error->next)
        error = error->next;
    
    /*
     * If the JS error was originally the result of a Java exception, rethrow
     * the original exception.
     */
    if (error->java_exception) {
        (*jEnv)->Throw(jEnv, error->java_exception);
        goto done;
    }

    /* Propagate any JS errors that did not originate as Java exceptions into
       Java as an instance of netscape.javascript.JSException */

    /* First, marshall the arguments to the JSException constructor */
    message_jstr = NULL;
    if (error->message) {
        message_jstr = (*jEnv)->NewStringUTF(jEnv, error->message);
        if (!message_jstr)
            goto out_of_memory;
    }

    report = &error->report;

    filename_jstr = NULL;
    if (report->filename) {
        filename_jstr = (*jEnv)->NewStringUTF(jEnv, report->filename);
        if (!filename_jstr)
            goto out_of_memory;
    }

    linebuf_jstr = NULL;
    if (report->linebuf) {
        linebuf_jstr = (*jEnv)->NewStringUTF(jEnv, report->linebuf);
        if (!linebuf_jstr)
            goto out_of_memory;
    }

    lineno = report->lineno;
    index = report->linebuf ? report->tokenptr - report->linebuf : 0;

    /* Call the JSException constructor */
    java_exception = (*jEnv)->NewObject(jEnv, njJSException, njJSException_JSException,
                                        message_jstr, filename_jstr, lineno, linebuf_jstr, index);
    if (!java_exception)
        goto out_of_memory;

    /* Throw the newly-created JSException */
    if ((*jEnv)->Throw(jEnv, java_exception) < 0) {
        JS_ASSERT(0);
        jsj_UnexpectedJavaError(cx, jEnv, "Couldn't throw JSException\n");
    }
    goto done;

out_of_memory:
    /* No recovery possible */
    JS_ASSERT(0);
    jsj_LogError("Out of memory while attempting to throw JSException\n");

done:
    jsj_ClearPendingJSErrors(jsj_env);
    /*
     * Release local references to Java objects, since some JVMs seem reticent
     * about collecting them otherwise.
     */
    if (message_jstr)
        (*jEnv)->DeleteLocalRef(jEnv, message_jstr);
    if (filename_jstr)
        (*jEnv)->DeleteLocalRef(jEnv, filename_jstr);
    if (linebuf_jstr)
        (*jEnv)->DeleteLocalRef(jEnv, linebuf_jstr);
    if (java_exception)
        (*jEnv)->DeleteLocalRef(jEnv, java_exception);
}
コード例 #6
0
ファイル: jsj_JSObject.c プロジェクト: chemeris/sipxecs
/*
 * Class:     netscape_javascript_JSObject
 * Method:    eval
 * Signature: (Ljava/lang/String;)Ljava/lang/Object;
 */
JNIEXPORT jobject JNICALL
Java_netscape_javascript_JSObject_eval(JNIEnv *jEnv,
                                       jobject java_wrapper_obj,
                                       jstring eval_jstr)
{
    const char *codebase;
    JSPrincipals *principals;
    JSContext *cx = NULL;
    JSBool eval_succeeded;
    JSObject *js_obj;
    jsval js_val;
    int dummy_cost;
    JSBool dummy_bool;
    const jchar *eval_ucs2;
    jsize eval_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;
    
    result = NULL;
    eval_ucs2 = NULL;
    if (!eval_jstr) {
        JS_ReportErrorNumber(cx, jsj_GetErrorMessage, NULL, 
                                                JSJMSG_NULL_EVAL_ARG);
        goto done;
    }

    /* Get the string to eval as raw Unicode characters */
    eval_ucs2 = (*jEnv)->GetStringChars(jEnv, eval_jstr, &is_copy);
    if (!eval_ucs2) {
        JS_ASSERT(0);
        goto done;
    }
    eval_len = (*jEnv)->GetStringLength(jEnv, eval_jstr);
    
    /* Set up security stuff */
    principals = NULL;
    if (JSJ_callbacks && JSJ_callbacks->get_JSPrincipals_from_java_caller)
        principals = JSJ_callbacks->get_JSPrincipals_from_java_caller(jEnv, cx, NULL, 0, NULL);
    codebase = principals ? principals->codebase : NULL;

    /* Have the JS engine evaluate the unicode string */
    eval_succeeded = JS_EvaluateUCScriptForPrincipals(cx, js_obj, principals,
                                                      eval_ucs2, eval_len,
                                                      codebase, 0, &js_val);
    if (!eval_succeeded)
        goto done;

    /* Convert result to a subclass of java.lang.Object */
    jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, jsj_get_jlObject_descriptor(cx, jEnv),
                                   &dummy_cost, &result, &dummy_bool);

done:
    if (eval_ucs2)
        (*jEnv)->ReleaseStringChars(jEnv, eval_jstr, eval_ucs2);
    if (!jsj_exit_js(cx, jsj_env, saved_reporter))
        return NULL;
    
    return result;
}
コード例 #7
0
ファイル: jsj_JSObject.c プロジェクト: chemeris/sipxecs
/*
 * 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;
}
コード例 #8
0
ファイル: nsCLiveconnect.cpp プロジェクト: ahadzi/celtx
NS_METHOD	
nsCLiveconnect::Eval(JNIEnv *jEnv, lcjsobject obj, const jchar *script, jsize length, void* principalsArray[], 
                     int numPrincipals, nsISupports *securitySupports, jobject *pjobj)
{
    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;
    int                dummy_cost     = 0;
    JSBool             dummy_bool     = PR_FALSE;
    JSErrorReporter    saved_state    = NULL;
    jobject            result         = NULL;
	const char		  *codebase       = NULL;
    JSPrincipals      *principals     = NULL;
    JSBool             eval_succeeded = PR_FALSE;

    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 (!script) {
        JS_ReportError(cx, "illegal null string eval argument");
        goto done;
    }

    /* Set up security stuff */
    if (JSJ_callbacks && JSJ_callbacks->get_JSPrincipals_from_java_caller)
        principals = JSJ_callbacks->get_JSPrincipals_from_java_caller(jEnv, cx, principalsArray, numPrincipals, securitySupports);
    codebase = principals ? principals->codebase : NULL;

    /* Have the JS engine evaluate the unicode string */
    eval_succeeded = JS_EvaluateUCScriptForPrincipals(cx, js_obj, principals,
                                                      script, length,
                                                      codebase, 0, &js_val);

    if (!eval_succeeded)
        goto done;

    /* Convert result to a subclass of java.lang.Object */
    jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, jsj_get_jlObject_descriptor(cx, jEnv),
                                   &dummy_cost, &result, &dummy_bool);

done:
    if (principals)
        JSPRINCIPALS_DROP(cx, principals);
    if (!jsj_exit_js(cx, jsj_env, saved_state))
       return NS_ERROR_FAILURE;
    
    *pjobj = result;
    return NS_OK;
}
コード例 #9
0
ファイル: nsCLiveconnect.cpp プロジェクト: ahadzi/celtx
/**
 * 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;
}
コード例 #10
0
ファイル: nsCLiveconnect.cpp プロジェクト: ahadzi/celtx
NS_INTERFACE_MAP_END



////////////////////////////////////////////////////////////////////////////
// from nsILiveconnect:

/**
 * get 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 pjobj      - return parameter as a java object representing 
 *                     the member. If it is a basic data type it is converted to
 *                     a corresponding java type. If it is a NJSObject, then it is
 *                     wrapped up as java wrapper netscape.javascript.JSObject.
 */
NS_METHOD	
nsCLiveconnect::GetMember(JNIEnv *jEnv, lcjsobject obj, const jchar *name, jsize length, void* principalsArray[], 
                     int numPrincipals, nsISupports *securitySupports, jobject *pjobj)
{
    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;
    jobject            member         = NULL;
    jsval              js_val;
    int                dummy_cost     = 0;
    JSBool             dummy_bool     = PR_FALSE;
    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");
        member = NULL;
        goto done;
    }
    
    if (!JS_GetUCProperty(cx, js_obj, name, length, &js_val))
        goto done;

    jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, jsj_get_jlObject_descriptor(cx, jEnv),
                                   &dummy_cost, &member, &dummy_bool);

done:
    if (!jsj_exit_js(cx, jsj_env, saved_state))
        return NS_ERROR_FAILURE;
    
    *pjobj = member;

    return NS_OK;
}