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/*************************************************************************/
/* jni_singleton.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* 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. */
/*************************************************************************/
#ifndef JNI_SINGLETON_H
#define JNI_SINGLETON_H
#include <core/engine.h>
#include <core/variant.h>
#ifdef ANDROID_ENABLED
#include <platform/android/jni_utils.h>
#endif
class JNISingleton : public Object {
GDCLASS(JNISingleton, Object);
#ifdef ANDROID_ENABLED
struct MethodData {
jmethodID method;
Variant::Type ret_type;
Vector<Variant::Type> argtypes;
};
jobject instance;
Map<StringName, MethodData> method_map;
#endif
public:
virtual Variant call(const StringName &p_method, const Variant **p_args, int p_argcount, Variant::CallError &r_error) {
#ifdef ANDROID_ENABLED
Map<StringName, MethodData>::Element *E = method_map.find(p_method);
// Check the method we're looking for is in the JNISingleton map and that
// the arguments match.
bool call_error = !E || E->get().argtypes.size() != p_argcount;
if (!call_error) {
for (int i = 0; i < p_argcount; i++) {
if (!Variant::can_convert(p_args[i]->get_type(), E->get().argtypes[i])) {
call_error = true;
break;
}
}
}
if (call_error) {
// The method is not in this map, defaulting to the regular instance calls.
return Object::call(p_method, p_args, p_argcount, r_error);
}
ERR_FAIL_COND_V(!instance, Variant());
r_error.error = Variant::CallError::CALL_OK;
jvalue *v = NULL;
if (p_argcount) {
v = (jvalue *)alloca(sizeof(jvalue) * p_argcount);
}
JNIEnv *env = ThreadAndroid::get_env();
int res = env->PushLocalFrame(16);
ERR_FAIL_COND_V(res != 0, Variant());
List<jobject> to_erase;
for (int i = 0; i < p_argcount; i++) {
jvalret vr = _variant_to_jvalue(env, E->get().argtypes[i], p_args[i]);
v[i] = vr.val;
if (vr.obj)
to_erase.push_back(vr.obj);
}
Variant ret;
switch (E->get().ret_type) {
case Variant::NIL: {
env->CallVoidMethodA(instance, E->get().method, v);
} break;
case Variant::BOOL: {
ret = env->CallBooleanMethodA(instance, E->get().method, v) == JNI_TRUE;
} break;
case Variant::INT: {
ret = env->CallIntMethodA(instance, E->get().method, v);
} break;
case Variant::REAL: {
ret = env->CallFloatMethodA(instance, E->get().method, v);
} break;
case Variant::STRING: {
jobject o = env->CallObjectMethodA(instance, E->get().method, v);
ret = jstring_to_string((jstring)o, env);
env->DeleteLocalRef(o);
} break;
case Variant::POOL_STRING_ARRAY: {
jobjectArray arr = (jobjectArray)env->CallObjectMethodA(instance, E->get().method, v);
ret = _jobject_to_variant(env, arr);
env->DeleteLocalRef(arr);
} break;
case Variant::POOL_INT_ARRAY: {
jintArray arr = (jintArray)env->CallObjectMethodA(instance, E->get().method, v);
int fCount = env->GetArrayLength(arr);
PoolVector<int> sarr;
sarr.resize(fCount);
PoolVector<int>::Write w = sarr.write();
env->GetIntArrayRegion(arr, 0, fCount, w.ptr());
w.release();
ret = sarr;
env->DeleteLocalRef(arr);
} break;
case Variant::POOL_REAL_ARRAY: {
jfloatArray arr = (jfloatArray)env->CallObjectMethodA(instance, E->get().method, v);
int fCount = env->GetArrayLength(arr);
PoolVector<float> sarr;
sarr.resize(fCount);
PoolVector<float>::Write w = sarr.write();
env->GetFloatArrayRegion(arr, 0, fCount, w.ptr());
w.release();
ret = sarr;
env->DeleteLocalRef(arr);
} break;
case Variant::DICTIONARY: {
jobject obj = env->CallObjectMethodA(instance, E->get().method, v);
ret = _jobject_to_variant(env, obj);
env->DeleteLocalRef(obj);
} break;
default: {
env->PopLocalFrame(NULL);
ERR_FAIL_V(Variant());
} break;
}
while (to_erase.size()) {
env->DeleteLocalRef(to_erase.front()->get());
to_erase.pop_front();
}
env->PopLocalFrame(NULL);
return ret;
#else // ANDROID_ENABLED
// Defaulting to the regular instance calls.
return Object::call(p_method, p_args, p_argcount, r_error);
#endif
}
#ifdef ANDROID_ENABLED
jobject get_instance() const {
return instance;
}
void set_instance(jobject p_instance) {
instance = p_instance;
}
void add_method(const StringName &p_name, jmethodID p_method, const Vector<Variant::Type> &p_args, Variant::Type p_ret_type) {
MethodData md;
md.method = p_method;
md.argtypes = p_args;
md.ret_type = p_ret_type;
method_map[p_name] = md;
}
void add_signal(const StringName &p_name, const Vector<Variant::Type> &p_args) {
if (p_args.size() == 0)
ADD_SIGNAL(MethodInfo(p_name));
else if (p_args.size() == 1)
ADD_SIGNAL(MethodInfo(p_name, PropertyInfo(p_args[0], "arg1")));
else if (p_args.size() == 2)
ADD_SIGNAL(MethodInfo(p_name, PropertyInfo(p_args[0], "arg1"), PropertyInfo(p_args[1], "arg2")));
else if (p_args.size() == 3)
ADD_SIGNAL(MethodInfo(p_name, PropertyInfo(p_args[0], "arg1"), PropertyInfo(p_args[1], "arg2"), PropertyInfo(p_args[2], "arg3")));
else if (p_args.size() == 4)
ADD_SIGNAL(MethodInfo(p_name, PropertyInfo(p_args[0], "arg1"), PropertyInfo(p_args[1], "arg2"), PropertyInfo(p_args[2], "arg3"), PropertyInfo(p_args[3], "arg4")));
else if (p_args.size() == 5)
ADD_SIGNAL(MethodInfo(p_name, PropertyInfo(p_args[0], "arg1"), PropertyInfo(p_args[1], "arg2"), PropertyInfo(p_args[2], "arg3"), PropertyInfo(p_args[3], "arg4"), PropertyInfo(p_args[4], "arg5")));
}
#endif
JNISingleton() {
#ifdef ANDROID_ENABLED
instance = NULL;
#endif
}
};
#endif // JNI_SINGLETON_H
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