/*

 * This file is part of libbluray

 * Copyright (C) 2012  Petri Hintukainen <phintuka@users.sourceforge.net>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library. If not, see

 * <http://www.gnu.org/licenses/>.

 */

#if HAVE_CONFIG_H

#include "config.h"

#endif

#include "register_native.h"

#include "util/logging.h"

#include <jni.h>

static int _register_methods(JNIEnv *env, const char *class_name,

                               const JNINativeMethod *methods, int methods_count)

{

    jclass cls;

    int error;

    (*env)->ExceptionClear(env);

    cls = (*env)->FindClass(env, class_name);

    if (!cls) {

        BD_DEBUG(DBG_BDJ | DBG_CRIT, "Failed to locate class %s\n", class_name);

        (*env)->ExceptionDescribe(env);

        (*env)->ExceptionClear(env);

        return 0;

    }

    error =  (*env)->RegisterNatives(env, cls, methods, methods_count);

    if ((*env)->ExceptionOccurred(env)) {

        BD_DEBUG(DBG_BDJ | DBG_CRIT, "Failed to register native methods for class %s\n", class_name);

        (*env)->ExceptionDescribe(env);

        (*env)->ExceptionClear(env);

        return 0;

    }

    if (error) {

        BD_DEBUG(DBG_BDJ | DBG_CRIT, "Failed to register native methods for class %s\n", class_name);

    }

    return !error;

}

static int _unregister_methods(JNIEnv *env, const char *class_name)

{

    jclass cls;

    int error;

    (*env)->ExceptionClear(env);

    cls = (*env)->FindClass(env, class_name);

    if (!cls) {

        BD_DEBUG(DBG_BDJ | DBG_CRIT, "Failed to locate class %s\n", class_name);

        (*env)->ExceptionDescribe(env);

        (*env)->ExceptionClear(env);

        return 0;

    }

    error =  (*env)->UnregisterNatives(env, cls);

    if ((*env)->ExceptionOccurred(env)) {

        BD_DEBUG(DBG_BDJ | DBG_CRIT, "Failed to unregister native methods for class %s\n", class_name);

        (*env)->ExceptionDescribe(env);

        (*env)->ExceptionClear(env);

        return 0;

    }

    if (error) {

        BD_DEBUG(DBG_BDJ | DBG_CRIT, "Failed to unegister native methods for class %s\n", class_name);

    }

    return !error;

}

int bdj_register_native_methods(JNIEnv *env)

{

    extern const JNINativeMethod Java_org_videolan_Logger_methods[];

    extern const JNINativeMethod Java_org_videolan_Libbluray_methods[];

    extern const JNINativeMethod Java_java_awt_BDGraphics_methods[];

    extern const JNINativeMethod Java_java_awt_BDFontMetrics_methods[];

    extern const int Java_org_videolan_Logger_methods_count;

    extern const int Java_org_videolan_Libbluray_methods_count;

    extern const int Java_java_awt_BDGraphics_methods_count;

    extern const int Java_java_awt_BDFontMetrics_methods_count;

    int result = _register_methods(env, "org/videolan/Logger",

        Java_org_videolan_Logger_methods,

        Java_org_videolan_Logger_methods_count);

    result *= _register_methods(env, "org/videolan/Libbluray",

        Java_org_videolan_Libbluray_methods,

        Java_org_videolan_Libbluray_methods_count);

      /* BDFontMetrics must be registered before BDGraphics */

    result *= _register_methods(env, "java/awt/BDFontMetrics",

        Java_java_awt_BDFontMetrics_methods,

        Java_java_awt_BDFontMetrics_methods_count);

    result *= _register_methods(env, "java/awt/BDGraphicsBase",

        Java_java_awt_BDGraphics_methods,

        Java_java_awt_BDGraphics_methods_count);

    return result;

}

void bdj_unregister_native_methods(JNIEnv *env)

{

    _unregister_methods(env, "java/awt/BDGraphicsBase");

    _unregister_methods(env, "java/awt/BDFontMetrics");

    _unregister_methods(env, "org/videolan/Libbluray");

    _unregister_methods(env, "org/videolan/Logger");

}