/*

* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#include "javajniutils.h"

#include "com_nokia_mj_impl_security_midp_authorization_ClassInstantiator.h"

using namespace std;

// forward declarations

void handleException(JNIEnv*, const char *);

JNIEXPORT

jobject JNICALL Java_com_nokia_mj_impl_security_midp_authorization_ClassInstantiator__1newInstance(

    JNIEnv* env, jclass /*peer*/, jstring className, jobjectArray args)

{

    //It is expected that class name is formatted in Java side to

    //format com/xxx/yyy

    jboolean isCopy;

    //Get the class name in utf8 format.

    const char* utf8ClassName(env->GetStringUTFChars(className, &isCopy));

    //Find the class

    jclass cls = env->FindClass(utf8ClassName);

    handleException(env,"Permission class not found");

    //Object to be returned

    jobject obj = 0;

    if (cls != 0)

    {

        //Create the signature. All the arguments are expected to be Strings.

        std::string signature = "(";

        int argCount = env->GetArrayLength(args); //How many arguments there are

        jvalue* jargs = new jvalue[argCount]; //Argument array for NewObjectA()

        for (int i = 0; i < argCount; i++)

        {

            signature += "Ljava/lang/String;"; //Append signature

            jobject o = env->GetObjectArrayElement(args, i); //Get the argument object

            jargs[i].l = o; //Store it to array

        }

        signature += ")V"; //Append the return type

        //Try to find the method id.

        jmethodID ctor = env->GetMethodID(cls,"<init>", signature.c_str());

        handleException(env, "No constructor found to match the supplied parameters");

        if (ctor)

        {

            //Construct the object

            obj = env->NewObjectA(cls, ctor, jargs);

            handleException(env, "Error instantiating a class with the supplied parameters");

        }

        delete[] jargs;

    }

    //Releasing the allocated class name

    env->ReleaseStringUTFChars(className, utf8ClassName);

    return obj;

}

void handleException(JNIEnv* env, const char * error_msg)

{

    jthrowable ex = env->ExceptionOccurred();

    if (ex)

    {

        env->ExceptionClear();

        jclass newExcClass;

        newExcClass = env->FindClass("java/lang/InstantiationException");

        if (newExcClass != 0)

        {

            env->ThrowNew(newExcClass, error_msg);

        }

    }

}