jni_utils.h

/**************************************************************************/
/*  jni_utils.h                                                           */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
/*                                                                        */
/* Permission is hereby granted, free of charge, to any person obtaining  */
/* a copy of this software and associated documentation files (the        */
/* "Software"), to deal in the Software without restriction, including    */
/* without limitation the rights to use, copy, modify, merge, publish,    */
/* distribute, sublicense, and/or sell copies of the Software, and to     */
/* permit persons to whom the Software is furnished to do so, subject to  */
/* the following conditions:                                              */
/*                                                                        */
/* The above copyright notice and this permission notice shall be         */
/* included in all copies or substantial portions of the Software.        */
/*                                                                        */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
/**************************************************************************/

#pragma once

#include "thread_jandroid.h"

#include "core/config/engine.h"
#include "core/string/ustring.h"
#include "core/variant/variant.h"

#include <jni.h>

jvalue _variant_to_jvalue(JNIEnv *env, Variant::Type p_type, const Variant *p_arg, bool force_jobject = false, int p_depth = 0);

String _get_class_name(JNIEnv *env, jclass cls, bool *array);

Variant _jobject_to_variant(JNIEnv *env, jobject obj, int p_depth = 0);

Variant::Type get_jni_type(const String &p_type);

/**
 * Convert a Godot Callable to a org.godotengine.godot.variant.Callable java object.
 * @param p_env JNI environment instance
 * @param p_callable Callable parameter to convert. If null or invalid type, a null jobject is returned.
 * @return org.godotengine.godot.variant.Callable jobject or null
 */
jobject callable_to_jcallable(JNIEnv *p_env, const Variant &p_callable);

/**
 * Convert a org.godotengine.godot.variant.Callable java object to a Godot Callable variant.
 * @param p_env JNI environment instance
 * @param p_jcallable_obj org.godotengine.godot.variant.Callable java object to convert.
 * @return Callable variant
 */
Callable jcallable_to_callable(JNIEnv *p_env, jobject p_jcallable_obj);

/**
 * Converts a java.lang.CharSequence object to a Godot String.
 * @param p_env  JNI environment instance
 * @param p_charsequence java.lang.CharSequence object to convert
 * @return Godot String instance.
 */
String charsequence_to_string(JNIEnv *p_env, jobject p_charsequence);

/**
 * Converts JNI jstring to Godot String.
 * @param source Source JNI string. If null an empty string is returned.
 * @param env JNI environment instance. If null obtained by get_jni_env().
 * @return Godot string instance.
 */
static inline String jstring_to_string(jstring source, JNIEnv *env = nullptr) {
	String result;
	if (source) {
		if (!env) {
			env = get_jni_env();
		}
		const char *const source_utf8 = env->GetStringUTFChars(source, nullptr);
		if (source_utf8) {
			result.append_utf8(source_utf8);
			env->ReleaseStringUTFChars(source, source_utf8);
		}
	}
	return result;
}

/**
 * Set up thread-safe Android ClassLoader (used by jni_find_class() below).
 */
void setup_android_class_loader();
void cleanup_android_class_loader();

/**
 * Thread-safe JNI class finder using Android ClassLoader.
 * Works on any thread, unlike standard FindClass which may fail on non-main threads.
 * @param p_env JNI environment instance.
 * @param p_class_name Class name to find.
 * @return jclass reference or null if not found.
 */
jclass jni_find_class(JNIEnv *p_env, const char *p_class_name);