godot/platform/android/java_class_wrapper.h

/*************************************************************************/
/*  java_class_wrapper.h                                                 */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
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#ifndef JAVA_CLASS_WRAPPER_H
#define JAVA_CLASS_WRAPPER_H

#include "reference.h"
#include <jni.h>
#include <android/log.h>

class JavaObject;

class JavaClass : public Reference {

	OBJ_TYPE(JavaClass,Reference);

	enum ArgumentType {

		ARG_TYPE_VOID,
		ARG_TYPE_BOOLEAN,
		ARG_TYPE_BYTE,
		ARG_TYPE_CHAR,
		ARG_TYPE_SHORT,
		ARG_TYPE_INT,
		ARG_TYPE_LONG,
		ARG_TYPE_FLOAT,
		ARG_TYPE_DOUBLE,
		ARG_TYPE_STRING, //special case
		ARG_TYPE_CLASS,
		ARG_ARRAY_BIT=1<<16,
		ARG_NUMBER_CLASS_BIT=1<<17,
		ARG_TYPE_MASK=(1<<16)-1
	};


	Map<StringName,Variant> constant_map;

	struct MethodInfo {

		bool _static;
		Vector<uint32_t> param_types;
		Vector<StringName> param_sigs;
		uint32_t return_type;
		jmethodID method;

	};

	_FORCE_INLINE_ static void _convert_to_variant_type(int p_sig, Variant::Type& r_type, float& likelyhood)  {

		likelyhood=1.0;
		r_type=Variant::NIL;

		switch(p_sig) {

			case ARG_TYPE_VOID: r_type=Variant::NIL; break;
			case ARG_TYPE_BOOLEAN|ARG_NUMBER_CLASS_BIT:
			case ARG_TYPE_BOOLEAN: r_type=Variant::BOOL; break;
			case ARG_TYPE_BYTE|ARG_NUMBER_CLASS_BIT:
			case ARG_TYPE_BYTE: r_type=Variant::INT; likelyhood=0.1; break;
			case ARG_TYPE_CHAR|ARG_NUMBER_CLASS_BIT:
			case ARG_TYPE_CHAR: r_type=Variant::INT; likelyhood=0.2; break;
			case ARG_TYPE_SHORT|ARG_NUMBER_CLASS_BIT:
			case ARG_TYPE_SHORT: r_type=Variant::INT; likelyhood=0.3; break;
			case ARG_TYPE_INT|ARG_NUMBER_CLASS_BIT:
			case ARG_TYPE_INT: r_type=Variant::INT; likelyhood=1.0; break;
			case ARG_TYPE_LONG|ARG_NUMBER_CLASS_BIT:
			case ARG_TYPE_LONG: r_type=Variant::INT; likelyhood=0.5; break;
			case ARG_TYPE_FLOAT|ARG_NUMBER_CLASS_BIT:
			case ARG_TYPE_FLOAT: r_type=Variant::REAL; likelyhood=1.0; break;
			case ARG_TYPE_DOUBLE|ARG_NUMBER_CLASS_BIT:
			case ARG_TYPE_DOUBLE: r_type=Variant::REAL; likelyhood=0.5; break;
			case ARG_TYPE_STRING: r_type=Variant::STRING;  break;
			case ARG_TYPE_CLASS: r_type=Variant::OBJECT;  break;
			case ARG_ARRAY_BIT|ARG_TYPE_VOID: r_type=Variant::NIL; break;
			case ARG_ARRAY_BIT|ARG_TYPE_BOOLEAN: r_type=Variant::ARRAY; break;
			case ARG_ARRAY_BIT|ARG_TYPE_BYTE: r_type=Variant::RAW_ARRAY; likelyhood=1.0; break;
			case ARG_ARRAY_BIT|ARG_TYPE_CHAR: r_type=Variant::RAW_ARRAY; likelyhood=0.5; break;
			case ARG_ARRAY_BIT|ARG_TYPE_SHORT: r_type=Variant::INT_ARRAY; likelyhood=0.3; break;
			case ARG_ARRAY_BIT|ARG_TYPE_INT: r_type=Variant::INT_ARRAY; likelyhood=1.0; break;
			case ARG_ARRAY_BIT|ARG_TYPE_LONG: r_type=Variant::INT_ARRAY; likelyhood=0.5; break;
			case ARG_ARRAY_BIT|ARG_TYPE_FLOAT: r_type=Variant::REAL_ARRAY; likelyhood=1.0; break;
			case ARG_ARRAY_BIT|ARG_TYPE_DOUBLE: r_type=Variant::REAL_ARRAY; likelyhood=0.5; break;
			case ARG_ARRAY_BIT|ARG_TYPE_STRING: r_type=Variant::STRING_ARRAY;  break;
			case ARG_ARRAY_BIT|ARG_TYPE_CLASS: r_type=Variant::ARRAY;  break;
		}
	}

	_FORCE_INLINE_ static bool _convert_object_to_variant(JNIEnv * env, jobject obj, Variant& var,uint32_t p_sig);



	bool _call_method(JavaObject* p_instance,const StringName& p_method,const Variant** p_args,int p_argcount,Variant::CallError &r_error,Variant& ret);

friend class JavaClassWrapper;
	Map<StringName,List<MethodInfo> > methods;
	jclass _class;

public:

	virtual Variant call(const StringName& p_method,const Variant** p_args,int p_argcount,Variant::CallError &r_error);

	JavaClass();

};


class JavaObject : public Reference {

	OBJ_TYPE(JavaObject,Reference);

	Ref<JavaClass> base_class;
friend class JavaClass;

	jobject instance;

public:

	virtual Variant call(const StringName& p_method,const Variant** p_args,int p_argcount,Variant::CallError &r_error);

	JavaObject(const Ref<JavaClass>& p_base,jobject *p_instance);
	~JavaObject();

};


class JavaClassWrapper : public Object {

	OBJ_TYPE(JavaClassWrapper,Object);


	Map<String,Ref<JavaClass> > class_cache;
friend class JavaClass;
	jclass activityClass;
	jmethodID findClass;
	jmethodID getDeclaredMethods;
	jmethodID getFields;
	jmethodID getParameterTypes;
	jmethodID getReturnType;
	jmethodID getModifiers;
	jmethodID getName;
	jmethodID Class_getName;
	jmethodID Field_getName;
	jmethodID Field_getModifiers;
	jmethodID Field_get;
	jmethodID Boolean_booleanValue;
	jmethodID Byte_byteValue;
	jmethodID Character_characterValue;
	jmethodID Short_shortValue;
	jmethodID Integer_integerValue;
	jmethodID Long_longValue;
	jmethodID Float_floatValue;
	jmethodID Double_doubleValue;
	jobject classLoader;

	bool _get_type_sig(JNIEnv *env, jobject obj, uint32_t& sig, String&strsig);

	static JavaClassWrapper *singleton;

protected:

	static void _bind_methods();
public:

	static JavaClassWrapper *get_singleton() { return singleton; }

	Ref<JavaClass> wrap(const String& p_class);

	JavaClassWrapper(jobject p_activity=NULL);
};

#endif // JAVA_CLASS_WRAPPER_H