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Implement has_java_method(...) for JavaClassWrapper and JNISingleton

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This commit is contained in:
Fredia Huya-Kouadio 2025-05-29 12:40:18 -07:00
parent d7382aa058
commit 0622cee189
8 changed files with 134 additions and 30 deletions
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9
doc/classes/JNISingleton.xml
View file

@ -9,4 +9,13 @@
<tutorials>
<link title="Creating Android plugins">$DOCS_URL/tutorials/platform/android/android_plugin.html#doc-android-plugin</link>
</tutorials>
<methods>
<method name="has_java_method" qualifiers="const">
<return type="bool" />
<param index="0" name="method" type="StringName" />
<description>
Returns [code]true[/code] if the given [param method] name exists in the JNISingleton's Java methods.
</description>
</method>
</methods>
</class>

7
doc/classes/JavaClass.xml
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@ -29,5 +29,12 @@
Returns a [JavaClass] representing the Java parent class of this class.
</description>
</method>
<method name="has_java_method" qualifiers="const">
<return type="bool" />
<param index="0" name="method" type="StringName" />
<description>
Returns [code]true[/code] if the given [param method] name exists in the object's Java methods.
</description>
</method>
</methods>
</class>

7
doc/classes/JavaObject.xml
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@ -17,5 +17,12 @@
Returns the [JavaClass] that this object is an instance of.
</description>
</method>
<method name="has_java_method" qualifiers="const">
<return type="bool" />
<param index="0" name="method" type="StringName" />
<description>
Returns [code]true[/code] if the given [param method] name exists in the object's Java methods.
</description>
</method>
</methods>
</class>

10
platform/android/api/api.cpp
View file

@ -62,10 +62,12 @@ void JavaClass::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_java_class_name"), &JavaClass::get_java_class_name);
ClassDB::bind_method(D_METHOD("get_java_method_list"), &JavaClass::get_java_method_list);
ClassDB::bind_method(D_METHOD("get_java_parent_class"), &JavaClass::get_java_parent_class);
ClassDB::bind_method(D_METHOD("has_java_method", "method"), &JavaClass::has_java_method);
}
void JavaObject::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_java_class"), &JavaObject::get_java_class);
ClassDB::bind_method(D_METHOD("has_java_method", "method"), &JavaObject::has_java_method);
}
void JavaClassWrapper::_bind_methods() {
@ -94,6 +96,10 @@ Ref<JavaClass> JavaClass::get_java_parent_class() const {
return Ref<JavaClass>();
}
bool JavaClass::has_java_method(const StringName &) const {
return false;
}
JavaClass::JavaClass() {
}
@ -108,6 +114,10 @@ Ref<JavaClass> JavaObject::get_java_class() const {
return Ref<JavaClass>();
}
bool JavaObject::has_java_method(const StringName &) const {
return false;
}
JavaClassWrapper *JavaClassWrapper::singleton = nullptr;
Ref<JavaClass> JavaClassWrapper::_wrap(const String &, bool) {

6
platform/android/api/java_class_wrapper.h
View file

@ -200,6 +200,7 @@ public:
String get_java_class_name() const;
TypedArray<Dictionary> get_java_method_list() const;
Ref<JavaClass> get_java_parent_class() const;
bool has_java_method(const StringName &p_method) const;
#ifdef ANDROID_ENABLED
virtual String to_string() override;
@ -226,6 +227,7 @@ public:
virtual Variant callp(const StringName &p_method, const Variant **p_args, int p_argcount, Callable::CallError &r_error) override;
Ref<JavaClass> get_java_class() const;
bool has_java_method(const StringName &p_method) const;
#ifdef ANDROID_ENABLED
virtual String to_string() override;
@ -244,7 +246,7 @@ class JavaClassWrapper : public Object {
#ifdef ANDROID_ENABLED
RBMap<String, Ref<JavaClass>> class_cache;
friend class JavaClass;
jmethodID Class_getDeclaredConstructors;
jmethodID Class_getConstructors;
jmethodID Class_getDeclaredMethods;
jmethodID Class_getFields;
jmethodID Class_getName;
@ -272,7 +274,7 @@ class JavaClassWrapper : public Object {
Ref<JavaObject> exception;
Ref<JavaClass> _wrap(const String &p_class, bool p_allow_private_methods_access);
Ref<JavaClass> _wrap(const String &p_class, bool p_allow_non_public_methods_access);
static JavaClassWrapper *singleton;

63
platform/android/api/jni_singleton.h
View file

@ -46,35 +46,60 @@ class JNISingleton : public Object {
RBMap<StringName, MethodData> method_map;
Ref<JavaObject> wrapped_object;
protected:
static void _bind_methods() {
ClassDB::bind_method(D_METHOD("has_java_method", "method"), &JNISingleton::has_java_method);
}
public:
virtual Variant callp(const StringName &p_method, const Variant **p_args, int p_argcount, Callable::CallError &r_error) override {
if (wrapped_object.is_valid()) {
RBMap<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) {
return wrapped_object->callp(p_method, p_args, p_argcount, r_error);
}
// Godot methods take precedence.
Variant ret = Object::callp(p_method, p_args, p_argcount, r_error);
if (r_error.error == Callable::CallError::CALL_OK) {
return ret;
}
return Object::callp(p_method, p_args, p_argcount, r_error);
// Check the method we're looking for is in the JNISingleton map.
RBMap<StringName, MethodData>::Element *E = method_map.find(p_method);
if (E) {
if (wrapped_object.is_valid()) {
// Check that the arguments match.
int method_arg_count = E->get().argtypes.size();
if (p_argcount < method_arg_count) {
r_error.error = Callable::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS;
} else if (p_argcount > method_arg_count) {
r_error.error = Callable::CallError::CALL_ERROR_TOO_MANY_ARGUMENTS;
} else {
// Check the arguments are valid.
bool arguments_valid = true;
for (int i = 0; i < p_argcount; i++) {
if (!Variant::can_convert(p_args[i]->get_type(), E->get().argtypes[i])) {
arguments_valid = false;
break;
}
}
if (arguments_valid) {
return wrapped_object->callp(p_method, p_args, p_argcount, r_error);
} else {
r_error.error = Callable::CallError::CALL_ERROR_INVALID_ARGUMENT;
}
}
} else {
r_error.error = Callable::CallError::CALL_ERROR_INSTANCE_IS_NULL;
}
}
return Variant();
}
Ref<JavaObject> get_wrapped_object() const {
return wrapped_object;
}
bool has_java_method(const StringName &p_method) const {
return method_map.has(p_method);
}
void add_method(const StringName &p_name, const Vector<Variant::Type> &p_args, Variant::Type p_ret_type) {
MethodData md;
md.argtypes = p_args;

2
platform/android/java/lib/src/org/godotengine/godot/plugin/AndroidRuntimePlugin.kt
View file

@ -51,7 +51,7 @@ class AndroidRuntimePlugin(godot: Godot) : GodotPlugin(godot) {
* Provides access to the host [android.app.Activity] to GDScript
*/
@UsedByGodot
override fun getActivity() = super.getActivity()
public override fun getActivity() = super.getActivity()
/**
* Utility method used to create [Runnable] from Godot [Callable].

60
platform/android/java_class_wrapper.cpp
View file

@ -36,6 +36,7 @@
bool JavaClass::_call_method(JavaObject *p_instance, const StringName &p_method, const Variant **p_args, int p_argcount, Callable::CallError &r_error, Variant &ret) {
HashMap<StringName, List<MethodInfo>>::Iterator M = methods.find(p_method);
if (!M) {
r_error.error = Callable::CallError::CALL_ERROR_INVALID_METHOD;
return false;
}
@ -756,7 +757,11 @@ bool JavaClass::_get(const StringName &p_name, Variant &r_ret) const {
}
Variant JavaClass::callp(const StringName &p_method, const Variant **p_args, int p_argcount, Callable::CallError &r_error) {
Variant ret;
// Godot methods take precedence.
Variant ret = RefCounted::callp(p_method, p_args, p_argcount, r_error);
if (r_error.error == Callable::CallError::CALL_OK) {
return ret;
}
String method = (p_method == java_constructor_name) ? "<init>" : p_method;
bool found = _call_method(nullptr, method, p_args, p_argcount, r_error, ret);
@ -764,7 +769,7 @@ Variant JavaClass::callp(const StringName &p_method, const Variant **p_args, int
return ret;
}
return RefCounted::callp(p_method, p_args, p_argcount, r_error);
return Variant();
}
String JavaClass::get_java_class_name() const {
@ -858,6 +863,11 @@ String JavaClass::to_string() {
return "<JavaClass:" + java_class_name + ">";
}
bool JavaClass::has_java_method(const StringName &p_method) const {
String method = (p_method == java_constructor_name) ? "<init>" : p_method;
return methods.has(method);
}
JavaClass::JavaClass() {
}
@ -873,10 +883,15 @@ JavaClass::~JavaClass() {
/////////////////////
Variant JavaObject::callp(const StringName &p_method, const Variant **p_args, int p_argcount, Callable::CallError &r_error) {
// Godot methods take precedence.
Variant ret = RefCounted::callp(p_method, p_args, p_argcount, r_error);
if (r_error.error == Callable::CallError::CALL_OK) {
return ret;
}
if (instance) {
Ref<JavaClass> c = base_class;
while (c.is_valid()) {
Variant ret;
bool found = c->_call_method(this, p_method, p_args, p_argcount, r_error, ret);
if (found) {
return ret;
@ -885,7 +900,7 @@ Variant JavaObject::callp(const StringName &p_method, const Variant **p_args, in
}
}
return RefCounted::callp(p_method, p_args, p_argcount, r_error);
return Variant();
}
Ref<JavaClass> JavaObject::get_java_class() const {
@ -899,6 +914,19 @@ String JavaObject::to_string() {
return RefCounted::to_string();
}
bool JavaObject::has_java_method(const StringName &p_method) const {
if (instance) {
Ref<JavaClass> c = base_class;
while (c.is_valid()) {
if (c->has_java_method(p_method)) {
return true;
}
c = c->get_java_parent_class();
}
}
return false;
}
JavaObject::JavaObject() {
}
@ -1461,7 +1489,7 @@ bool JavaClass::_convert_object_to_variant(JNIEnv *env, jobject obj, Variant &va
return false;
}
Ref<JavaClass> JavaClassWrapper::_wrap(const String &p_class, bool p_allow_private_methods_access) {
Ref<JavaClass> JavaClassWrapper::_wrap(const String &p_class, bool p_allow_non_public_methods_access) {
String class_name_dots = p_class.replace_char('/', '.');
if (class_cache.has(class_name_dots)) {
return class_cache[class_name_dots];
@ -1473,10 +1501,18 @@ Ref<JavaClass> JavaClassWrapper::_wrap(const String &p_class, bool p_allow_priva
jclass bclass = jni_find_class(env, class_name_dots.replace_char('.', '/').utf8().get_data());
ERR_FAIL_NULL_V_MSG(bclass, Ref<JavaClass>(), vformat("Java class '%s' not found.", p_class));
jobjectArray constructors = (jobjectArray)env->CallObjectMethod(bclass, Class_getDeclaredConstructors);
jobjectArray constructors = (jobjectArray)env->CallObjectMethod(bclass, Class_getConstructors);
if (env->ExceptionCheck()) {
env->ExceptionDescribe();
env->ExceptionClear();
}
ERR_FAIL_NULL_V(constructors, Ref<JavaClass>());
jobjectArray methods = (jobjectArray)env->CallObjectMethod(bclass, Class_getDeclaredMethods);
if (env->ExceptionCheck()) {
env->ExceptionDescribe();
env->ExceptionClear();
}
ERR_FAIL_NULL_V(methods, Ref<JavaClass>());
Ref<JavaClass> java_class = memnew(JavaClass);
@ -1515,8 +1551,9 @@ Ref<JavaClass> JavaClassWrapper::_wrap(const String &p_class, bool p_allow_priva
Vector<String> params;
jint mods = env->CallIntMethod(obj, is_constructor ? Constructor_getModifiers : Method_getModifiers);
bool is_public = (mods & 0x0001) != 0; // java.lang.reflect.Modifier.PUBLIC
if (!(mods & 0x0001) && (is_constructor || !p_allow_private_methods_access)) {
if (!is_public && (is_constructor || !p_allow_non_public_methods_access)) {
env->DeleteLocalRef(obj);
continue; //not public bye
}
@ -1627,6 +1664,13 @@ Ref<JavaClass> JavaClassWrapper::_wrap(const String &p_class, bool p_allow_priva
mi.method = env->GetMethodID(bclass, str_method.utf8().get_data(), signature.utf8().get_data());
}
if (env->ExceptionCheck()) {
// Exceptions may be thrown when trying to access hidden methods; write the exception to the logs and continue.
env->ExceptionDescribe();
env->ExceptionClear();
continue;
}
ERR_CONTINUE(!mi.method);
java_class->methods[str_method].push_back(mi);
@ -1700,7 +1744,7 @@ JavaClassWrapper::JavaClassWrapper() {
ERR_FAIL_NULL(env);
jclass bclass = jni_find_class(env, "java/lang/Class");
Class_getDeclaredConstructors = env->GetMethodID(bclass, "getDeclaredConstructors", "()[Ljava/lang/reflect/Constructor;");
Class_getConstructors = env->GetMethodID(bclass, "getConstructors", "()[Ljava/lang/reflect/Constructor;");
Class_getDeclaredMethods = env->GetMethodID(bclass, "getDeclaredMethods", "()[Ljava/lang/reflect/Method;");
Class_getFields = env->GetMethodID(bclass, "getFields", "()[Ljava/lang/reflect/Field;");
Class_getName = env->GetMethodID(bclass, "getName", "()Ljava/lang/String;");