--- parser3/src/classes/reflection.C	2009/07/24 09:29:29	1.1
+++ parser3/src/classes/reflection.C	2016/07/20 17:27:42	1.49
@@ -1,145 +1,359 @@
 /** @file
 	Parser: @b reflection parser class.
 
-	Copyright (c) 2001-2009 ArtLebedev Group (http://www.artlebedev.com)
+	Copyright (c) 2001-2015 Art. Lebedev Studio (http://www.artlebedev.com)
 	Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
 */
 
-static const char * const IDENT_REFLECTION_C="$Date: 2009/07/24 09:29:29 $";
-
 #include "pa_vmethod_frame.h"
 #include "pa_request.h"
 #include "pa_vbool.h"
 
+volatile const char * IDENT_REFLECTION_C="$Id: reflection.C,v 1.49 2016/07/20 17:27:42 moko Exp $";
+
+static const String class_type_methoded("methoded");
+
+static const String method_type_native("native");
+static const String method_type_parser("parser");
+
+static const String method_call_type("call_type");
+static const String method_inherited("inherited");
+static const String method_overridden("overridden");
+
+static const String method_min_params("min_params");
+static const String method_max_params("max_params");
+static const String method_extra_param("extra_param");
+
+static const String def_class("class");
+
 // class
 
 class MReflection: public Methoded {
 public:
 	MReflection();
-public: // Methoded
-	bool used_directly() { return true; }
 };
 
 // global variable
 
-DECLARE_CLASS_VAR(reflection, new MReflection, 0);
+DECLARE_CLASS_VAR(reflection, new MReflection);
 
 // methods
 
-static void _construct(Request& r, MethodParams& params) {
+
+static void _create(Request& r, MethodParams& params) {
 	const String& class_name=params.as_string(0, "class_name must be string");
-	Value* class_value=r.classes().get(class_name);
+	VStateless_class* vclass=r.get_class(class_name);
 
-	if(!class_value)
-		throw Exception(PARSER_RUNTIME,
-			&class_name,
-			"class is undefined");
+	if(!vclass)
+		throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
 
 	const String& constructor_name=params.as_string(1, "constructor_name must be string");
-	Value* constructor_value=class_value->get_element(constructor_name, *class_value, true);
+	Value* constructor_value=vclass->get_element(constructor_name);
 
 	if(!constructor_value || !constructor_value->get_junction())
 		throw Exception(PARSER_RUNTIME,
 			&constructor_name,
 			"constructor must be declared in class '%s'",
-			class_name.cstr());
+			vclass->type());
 
 	Junction* junction=constructor_value->get_junction();
+	const Method* method=junction->method;
 
-	VMethodFrame frame(*junction, r.get_method_frame());
+	int nparams=params.count()-2;
+	int max_params_count;
 
-	size_t nparams=params.count()-2;
-    Value* v[100];
+	if(method->native_code){
+		if(method->call_type==Method::CT_STATIC)
+			throw Exception(PARSER_RUNTIME,
+				&constructor_name,
+				"native method of class '%s' is not allowed to be called dynamically",
+				vclass->type());
+
+		if(nparams<method->min_numbered_params_count)
+			throw Exception(PARSER_RUNTIME,
+				&constructor_name,
+				"native method of class '%s' accepts minimum %d parameter(s) (%d passed)",
+				vclass->type(),
+				method->min_numbered_params_count,
+				nparams);
 
+		max_params_count=method->max_numbered_params_count;
+	} else {
+		max_params_count=method->params_names?method->params_names->count():0;
+	}
+
+	if(nparams>max_params_count)
+		throw Exception(PARSER_RUNTIME,
+			&constructor_name,
+			"method of class '%s' accepts maximum %d parameter(s) (%d passed)",
+			vclass->type(),
+			max_params_count,
+			nparams);
+
+	Value &object = r.construct(*vclass, *method);
+	VConstructorFrame frame(*method, r.get_method_frame(), object);
+
+	Value* v[100];
 	if(nparams>0){
-		for(size_t i=0; i<nparams; i++)
+		for(int i=0; i<nparams; i++)
 			v[i]=&r.process_to_value(params[i+2]);
 		frame.store_params((Value**)&v, nparams);
 	} else {
 		frame.empty_params();
 	}
-	r.op_call(frame, true/*constructing*/);
+	r.op_call(frame);
+	object.enable_default_setter();
 	r.write_pass_lang(frame.result());
 }
 
-static void _class(Request& r, MethodParams& params) {
-	if(Value* lclass=params[0].get_class())
-		r.write_no_lang(*lclass);
+
+static void _classes(Request& r, MethodParams&) {
+	VHash& result=*new VHash;
+	for(HashString<VStateless_class*>::Iterator i(r.classes()); i; i.next()){
+		result.hash().put(i.key(), i.value()->get_methods().count()>0 ? new VString(class_type_methoded) : VVoid::get() );
+	}
+	r.write_no_lang(result);
+}
+
+
+static Value* get_class(Value* value){
+	if(VStateless_class* result=value->get_class())
+		return result;
 	else
-		throw Exception(PARSER_RUNTIME,
-			0,
-			"class was not defined");
+		// junction
+		return value;
 }
 
-static void _class_name(Request& r, MethodParams& params) {
-	r.write_no_lang(String(params[0].type()));
+static const String* get_class_name(Value* value){
+	if(VStateless_class* vclass=value->get_class())
+		return new String(vclass->type());
+	else
+		// junction
+		return new String(value->type());
 }
 
-static void store_method_info(
-		HashString<Method*>::key_type key, 
-		HashString<Method*>::value_type value,
-		HashStringValue* result
-) {
-	VHash* method_info=new VHash;
-	HashStringValue* method_hash=method_info->get_hash();
-	bool native=false;
 
-	if(value->native_code){
-		// native code
-		native=true;
-		if(value->min_numbered_params_count)
-			method_hash->put(String("min_params"), new VInt(value->min_numbered_params_count));
+static void _class(Request& r, MethodParams& params) {
+	r.write_no_lang(*get_class(&params[0]));
+}
 
-		if(value->max_numbered_params_count)
-			method_hash->put(String("max_params"), new VInt(value->max_numbered_params_count));
-	} else {
-		// parser code
-		if(value->params_names){
-			VHash* params=new VHash;
-			method_hash->put(String("params"), params);
-			HashStringValue* params_hash=params->get_hash();
 
-			for(size_t i=0; i<value->params_names->count(); i++)
-				params_hash->put(String::Body::Format(i), new VString(*value->params_names->get(i)));
-		}
+static void _class_name(Request& r, MethodParams& params) {
+	r.write_no_lang(*get_class_name(&params[0]));
+}
 
-		if(value->locals_names){
-			VHash* locals=new VHash;
-			method_hash->put(String("locals"), locals);
-			HashStringValue* locals_hash=locals->get_hash();
-	
-			for(size_t i=0; i<value->locals_names->count(); i++)
-				locals_hash->put(String::Body::Format(i), new VString(*value->locals_names->get(i)));
+static void _class_by_name(Request& r, MethodParams& params) {
+	const String& class_name=params.as_string(0, "class_name must be string");
+	Value* class_value=r.get_class(class_name);
+	if(!class_value)
+		throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
+	r.write_no_lang(*class_value);
+}
+
+static void _base(Request& r, MethodParams& params) {
+	if(VStateless_class* vclass=params[0].get_class())
+		if(Value* base=vclass->base()){
+			r.write_no_lang(*get_class(base));
+			return;
 		}
-	}
 
-	method_hash->put(String("native"), &VBool::get(native));
-	result->put(key, method_info);
+	// classes with fields only, like env & console or without base
+	r.write_no_lang(*VVoid::get());
+}
+
+
+static void _base_name(Request& r, MethodParams& params) {
+	if(VStateless_class* vclass=params[0].get_class())
+		if(Value* base=vclass->base())
+			r.write_no_lang(*get_class_name(base));
+}
+
+static void _def(Request& r, MethodParams& params) {
+	const String& type=params.as_string(0, "type must be string");
+	if(type == def_class) {
+		const String& name=params.as_string(1, "name must be string");
+		// can't use get_class because it will call @autouse[] if the class wasn't loaded
+		r.write_no_lang(VBool::get(r.classes().get(name)!=0));
+	} else {
+		throw Exception(PARSER_RUNTIME, &type, "is invalid type, must be '%s'", def_class.cstr());
+	}
 }
 
 static void _methods(Request& r, MethodParams& params) {
 	const String& class_name=params.as_string(0, "class_name must be string");
-	Value* class_value=r.classes().get(class_name);
+	VStateless_class* vclass=r.get_class(class_name);
+	if(!vclass)
+		throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
 
-	if(!class_value)
-		throw Exception(PARSER_RUNTIME,
-			&class_name,
-			"class is undefined");
+	VHash& result=*new VHash;
+	for(HashStringMethod::Iterator i(vclass->get_methods()); i; i.next()){
+		result.hash().put(i.key(), new VString(i.value()->native_code ? method_type_native : method_type_parser));
+	}
+
+	r.write_no_lang(result);
+}
+
+static void _method(Request& r, MethodParams& params) {
+	Value& o=params.as_no_junction(0, "first param must be object or class, not junction");
+	const String& name=params.as_string(1, "method name must be string");
+
+	if(VStateless_class* vclass=o.get_class()) {
+		if(Method* method=vclass->get_method(name))
+			r.write_no_lang(*method->get_vjunction(o));
+	} else {
+		// class which does not have methods (env, console, etc)
+	}
+}
+
+static void _fields(Request& r, MethodParams& params) {
+	Value& o=params.as_no_junction(0, "param must be object or class, not junction");
+
+	if(HashStringValue* fields=o.get_fields())
+		r.write_no_lang(*new VHash(*fields));
+	else
+		r.write_no_lang(*new VHash());
+}
+
+static void _fields_reference(Request& r, MethodParams& params) {
+	Value& o=params.as_no_junction(0, "param must be object or hash, not junction");
+
+	if(HashStringValue* fields=o.get_fields_reference())
+		r.write_no_lang(*new VHashReference(*fields));
+	else
+		throw Exception(PARSER_RUNTIME, 0, "param must be object or hash");
+}
+
+static void _field(Request& r, MethodParams& params) {
+	Value& o=params.as_no_junction(0, "first param must be object or class, not junction");
+	const String& name=params.as_string(1, "field name must be string");
+
+	if(HashStringValue* fields=o.get_fields())
+		if(Value* value=fields->get(name))
+			r.write_no_lang(*value);
+}
+
+static void _method_info(Request& r, MethodParams& params) {
+	const String& class_name=params.as_string(0, "class_name must be string");
+	VStateless_class* vclass=r.get_class(class_name);
+	if(!vclass)
+		throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
+
+	const String& method_name=params.as_string(1, "method_name must be string");
+	Method* method=vclass->get_method(method_name);
+	if(!method)
+		throw Exception(PARSER_RUNTIME, &method_name, "method not found in class %s", class_name.cstr());
 
 	VHash& result=*new VHash;
-	if(VStateless_class* lclass=class_value->get_class()){
-		HashString<Method*> methods=lclass->get_methods();
-		methods.for_each(store_method_info, result.get_hash());
+	HashStringValue* hash=result.get_hash();
+
+	VStateless_class* c=vclass;
+	Method* base_method;
+	if(c->base() && (base_method=c->base()->get_method(method_name))){
+		c=c->base()->get_class();
+		while(c->base() && base_method==c->base()->get_method(method_name))
+			c=c->base()->get_class();
+		hash->put((base_method==method) ? method_inherited : method_overridden, new VString(*new String(c->type())));
+	}
+
+	Value* call_type=0;
+	switch(method->call_type){
+		case Method::CT_DYNAMIC:
+			call_type=new VString(Symbols::DYNAMIC_SYMBOL);
+			break;
+		case Method::CT_STATIC:
+			call_type=new VString(Symbols::STATIC_SYMBOL);
+			break;
+		case Method::CT_ANY:
+			break;
+	}
+	if(call_type)
+		hash->put(method_call_type, call_type);
+
+	if(method->native_code){
+		// native code
+		hash->put(method_min_params, new VInt(method->min_numbered_params_count));
+		hash->put(method_max_params, new VInt(method->max_numbered_params_count));
 	} else {
-		// exception?
+		// parser code
+		const String* filespec = r.get_method_filename(method);
+		if( filespec )
+			hash->put("file", new VString(*filespec));
+
+		hash->put(method_max_params, new VInt(method->params_names ? method->params_names->count() : 0));
+
+		if(method->params_names)
+			for(size_t i=0; i<method->params_names->count(); i++)
+				hash->put(String::Body::Format(i), new VString(*method->params_names->get(i)));
+
+		if(method->extra_params)
+			hash->put(method_extra_param, new VString(*method->extra_params));
 	}
+
 	r.write_no_lang(result);
 }
 
+static void _dynamical(Request& r, MethodParams& params) {
+	if(params.count()){
+		r.write_no_lang(VBool::get(params[0].get_class() != &params[0]));
+	} else {
+		VMethodFrame* caller=r.get_method_frame()->caller();
+		r.write_no_lang(VBool::get(caller && caller->get_class() != &caller->self()));
+	}
+}
+
+static void _is(Request& r, MethodParams& params) {
+	const String& name=params.as_string(0, "element name must be string");
+	const String& type=params.as_string(1, "class name must be string");
+	Value *context=params.count()==3 ? &(params.as_no_junction(2, "context must not be code")) : r.get_method_frame()->caller();
+	Value *value=context ? context->get_element(name) : 0;
+
+	if(value) {
+		if(type == "code" || type == "method") {
+			Junction *junction=value->get_junction();
+			r.write_no_lang(VBool::get(junction && ((junction->code==0) ^ (type == "code"))) );
+		} else {
+			r.write_no_lang(VBool::get( value->is(type.cstr()) ));
+		}
+	} else
+		r.write_no_lang(VBool::get(type == "void"));
+}
+
+static void _copy(Request& r, MethodParams& params) {
+	HashStringValue* src=params.as_no_junction(0, "source must not be code").get_hash();
+
+	if(src==NULL)
+		throw Exception(PARSER_RUNTIME, 0, "source must have hash representation");
+
+	Value& dst=params.as_no_junction(1, "destination must not be code");
+
+	for(HashStringValue::Iterator i(*src); i; i.next())
+		r.put_element(dst, *new String(i.key(), String::L_TAINTED), i.value());
+}
+
+static void _uid(Request& r, MethodParams& params) {
+	Value& obj=params.as_no_junction(0, "object must not be code");
+
+	char local_buf[MAX_NUMBER];
+	int size=snprintf(local_buf, sizeof(local_buf), "%p", &obj);
+
+	r.write_pass_lang(*new String(String::C(pa_strdup(local_buf, (size_t)size), size)));
+}
+
+static void _delete(Request&, MethodParams& params) {
+	const String& key=params.as_string(1, "field name must be string");
+	if(HashStringValue* fields=params[0].get_fields()){
+		fields->remove(key);
+	}
+}
+
+
 // constructor
 MReflection::MReflection(): Methoded("reflection") {
-	// ^reflection:construct[class;constructor;params[;]]
-	add_native_method("construct", Method::CT_STATIC, _construct, 2, 102);
+	// ^reflection:create[class_name;constructor_name[;param1[;param2[;...]]]]
+	add_native_method("create", Method::CT_STATIC, _create, 2, 102);
+
+	// ^reflection:classes[]
+	add_native_method("classes", Method::CT_STATIC, _classes, 0, 0);
 
 	// ^reflection:class[object]
 	add_native_method("class", Method::CT_STATIC, _class, 1, 1);
@@ -147,6 +361,48 @@ MReflection::MReflection(): Methoded("re
 	// ^reflection:class_name[object]
 	add_native_method("class_name", Method::CT_STATIC, _class_name, 1, 1);
 
-	// ^reflection:get_methods[object]
+	// ^reflection:class_by_name[class_name]
+	add_native_method("class_by_name", Method::CT_STATIC, _class_by_name, 1, 1);
+
+	// ^reflection:base_class[object]
+	add_native_method("base", Method::CT_STATIC, _base, 1, 1);
+
+	// ^reflection:base_class_name[object]
+	add_native_method("base_name", Method::CT_STATIC, _base_name, 1, 1);
+
+	// ^reflection:def[class|...;name]
+	add_native_method("def", Method::CT_STATIC, _def, 2, 2);
+
+	// ^reflection:methods[class_name]
 	add_native_method("methods", Method::CT_STATIC, _methods, 1, 1);
+
+	// ^reflection:method[object or class;method_name]
+	add_native_method("method", Method::CT_STATIC, _method, 2, 2);
+
+	// ^reflection:method_info[class_name;method_name]
+	add_native_method("method_info", Method::CT_STATIC, _method_info, 2, 2);
+
+	// ^reflection:fields[object or class]
+	add_native_method("fields", Method::CT_STATIC, _fields, 1, 1);
+
+	// ^reflection:fields_reference[object]
+	add_native_method("fields_reference", Method::CT_STATIC, _fields_reference, 1, 1);
+
+	// ^reflection:field[object or class;field_name]
+	add_native_method("field", Method::CT_STATIC, _field, 2, 2);
+
+	// ^reflection:dynamical[[object or class, caller if absent]]
+	add_native_method("dynamical", Method::CT_STATIC, _dynamical, 0, 1);
+
+	// ^reflection:is[element_name;class_name|code|method[;context]]
+	add_native_method("is", Method::CT_STATIC, _is, 2, 3);
+
+	// ^reflection:copy[src;dst]
+	add_native_method("copy", Method::CT_STATIC, _copy, 2, 2);
+
+	// ^reflection:uid[object or class]
+	add_native_method("uid", Method::CT_STATIC, _uid, 1, 1);
+
+	// ^reflection:delete[object or class;field_name]
+	add_native_method("delete", Method::CT_STATIC, _delete, 2, 2);
 }