Annotation of parser3/src/classes/reflection.C, revision 1.48
1.1 misha 1: /** @file
2: Parser: @b reflection parser class.
3:
1.38 moko 4: Copyright (c) 2001-2015 Art. Lebedev Studio (http://www.artlebedev.com)
1.1 misha 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
6: */
7:
8: #include "pa_vmethod_frame.h"
9: #include "pa_request.h"
10: #include "pa_vbool.h"
11:
1.48 ! moko 12: volatile const char * IDENT_REFLECTION_C="$Id: reflection.C,v 1.47 2016/07/20 16:36:48 moko Exp $";
1.24 moko 13:
1.3 misha 14: static const String class_type_methoded("methoded");
1.2 misha 15:
1.3 misha 16: static const String method_type_native("native");
17: static const String method_type_parser("parser");
1.2 misha 18:
1.5 misha 19: static const String method_call_type("call_type");
1.8 misha 20: static const String method_inherited("inherited");
1.23 misha 21: static const String method_overridden("overridden");
1.2 misha 22:
1.3 misha 23: static const String method_min_params("min_params");
24: static const String method_max_params("max_params");
1.29 misha 25: static const String method_extra_param("extra_param");
1.2 misha 26:
1.30 misha 27: static const String def_class("class");
28:
1.1 misha 29: // class
30:
31: class MReflection: public Methoded {
32: public:
33: MReflection();
34: };
35:
36: // global variable
37:
1.40 moko 38: DECLARE_CLASS_VAR(reflection, new MReflection);
1.1 misha 39:
40: // methods
41:
1.2 misha 42:
43: static void _create(Request& r, MethodParams& params) {
1.1 misha 44: const String& class_name=params.as_string(0, "class_name must be string");
1.48 ! moko 45: VStateless_class* vclass=r.get_class(class_name);
1.1 misha 46:
1.48 ! moko 47: if(!vclass)
! 48: throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
1.1 misha 49:
50: const String& constructor_name=params.as_string(1, "constructor_name must be string");
1.48 ! moko 51: Value* constructor_value=vclass->get_element(constructor_name);
1.1 misha 52:
1.10 misha 53: if(!constructor_value || !constructor_value->get_junction())
1.1 misha 54: throw Exception(PARSER_RUNTIME,
55: &constructor_name,
56: "constructor must be declared in class '%s'",
1.48 ! moko 57: vclass->type());
1.1 misha 58:
59: Junction* junction=constructor_value->get_junction();
1.2 misha 60: const Method* method=junction->method;
61:
62: int nparams=params.count()-2;
63: int max_params_count;
64:
65: if(method->native_code){
66: if(method->call_type==Method::CT_STATIC)
67: throw Exception(PARSER_RUNTIME,
68: &constructor_name,
1.41 moko 69: "native method of class '%s' is not allowed to be called dynamically",
1.48 ! moko 70: vclass->type());
1.2 misha 71:
72: if(nparams<method->min_numbered_params_count)
73: throw Exception(PARSER_RUNTIME,
74: &constructor_name,
1.41 moko 75: "native method of class '%s' accepts minimum %d parameter(s) (%d passed)",
1.48 ! moko 76: vclass->type(),
1.2 misha 77: method->min_numbered_params_count,
78: nparams);
79:
80: max_params_count=method->max_numbered_params_count;
81: } else {
1.12 misha 82: max_params_count=method->params_names?method->params_names->count():0;
1.2 misha 83: }
84:
85: if(nparams>max_params_count)
86: throw Exception(PARSER_RUNTIME,
87: &constructor_name,
1.41 moko 88: "method of class '%s' accepts maximum %d parameter(s) (%d passed)",
1.48 ! moko 89: vclass->type(),
1.2 misha 90: max_params_count,
91: nparams);
1.1 misha 92:
1.48 ! moko 93: Value &object = r.construct(*vclass, *method);
1.17 moko 94: VConstructorFrame frame(*method, r.get_method_frame(), object);
1.1 misha 95:
1.3 misha 96: Value* v[100];
1.1 misha 97: if(nparams>0){
1.2 misha 98: for(int i=0; i<nparams; i++)
1.1 misha 99: v[i]=&r.process_to_value(params[i+2]);
100: frame.store_params((Value**)&v, nparams);
101: } else {
102: frame.empty_params();
103: }
1.17 moko 104: r.op_call(frame);
1.18 moko 105: object.enable_default_setter();
1.21 moko 106: r.write_pass_lang(frame.result());
1.1 misha 107: }
108:
1.2 misha 109:
1.3 misha 110: static void _classes(Request& r, MethodParams&) {
111: VHash& result=*new VHash;
1.47 moko 112: for(HashString<VStateless_class*>::Iterator i(r.classes()); i; i.next()){
113: result.hash().put(i.key(), i.value()->get_methods().count()>0 ? new VString(class_type_methoded) : VVoid::get() );
114: }
1.3 misha 115: r.write_no_lang(result);
116: }
117:
118:
119: static Value* get_class(Value* value){
120: if(VStateless_class* result=value->get_class())
121: return result;
122: else
123: // classes with fields only, like env & console
124: return value;
125: }
126:
127: static const String* get_class_name(Value* value){
128: if(VStateless_class* lclass=value->get_class())
1.41 moko 129: return new String(lclass->type());
1.3 misha 130: else
131: // classes with fields only, like env & console
132: return new String(value->type());
133: }
134:
135:
1.1 misha 136: static void _class(Request& r, MethodParams& params) {
1.3 misha 137: r.write_no_lang(*get_class(¶ms[0]));
1.1 misha 138: }
139:
1.2 misha 140:
1.1 misha 141: static void _class_name(Request& r, MethodParams& params) {
1.3 misha 142: r.write_no_lang(*get_class_name(¶ms[0]));
1.1 misha 143: }
144:
1.34 moko 145: static void _class_by_name(Request& r, MethodParams& params) {
146: const String& class_name=params.as_string(0, "class_name must be string");
147: Value* class_value=r.get_class(class_name);
148: if(!class_value)
149: throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
150: r.write_no_lang(*class_value);
151: }
1.1 misha 152:
1.2 misha 153: static void _base(Request& r, MethodParams& params) {
1.3 misha 154: if(VStateless_class* lclass=params[0].get_class())
155: if(Value* base=lclass->base()){
156: r.write_no_lang(*get_class(base));
157: return;
158: }
159:
160: // classes with fields only, like env & console or without base
161: r.write_no_lang(*VVoid::get());
1.2 misha 162: }
1.1 misha 163:
164:
1.2 misha 165: static void _base_name(Request& r, MethodParams& params) {
1.3 misha 166: if(VStateless_class* lclass=params[0].get_class())
1.2 misha 167: if(Value* base=lclass->base())
1.3 misha 168: r.write_no_lang(*get_class_name(base));
1.2 misha 169: }
1.1 misha 170:
1.2 misha 171: static void store_method_info(
1.7 misha 172: HashStringMethod::key_type key,
173: HashStringMethod::value_type method,
1.8 misha 174: HashStringValue* result
1.2 misha 175: ) {
1.8 misha 176: result->put(key, new VString(method->native_code?method_type_native:method_type_parser));
1.1 misha 177: }
178:
1.30 misha 179: static void _def(Request& r, MethodParams& params) {
180: const String& type=params.as_string(0, "type must be string");
181: if(type == def_class) {
182: const String& name=params.as_string(1, "name must be string");
1.47 moko 183: // can't use get_class because it will call @autouse[] if the class wasn't loaded
1.43 moko 184: r.write_no_lang(VBool::get(r.classes().get(name)!=0));
1.30 misha 185: } else {
1.31 misha 186: throw Exception(PARSER_RUNTIME, &type, "is invalid type, must be '%s'", def_class.cstr());
1.30 misha 187: }
188: }
189:
1.1 misha 190: static void _methods(Request& r, MethodParams& params) {
191: const String& class_name=params.as_string(0, "class_name must be string");
1.11 misha 192: Value* class_value=r.get_class(class_name);
1.1 misha 193: if(!class_value)
194: throw Exception(PARSER_RUNTIME,
195: &class_name,
196: "class is undefined");
197:
198: VHash& result=*new VHash;
1.28 misha 199: if(VStateless_class* lclass=class_value->get_class()) {
1.7 misha 200: HashStringMethod methods=lclass->get_methods();
1.8 misha 201: methods.for_each(store_method_info, result.get_hash());
1.1 misha 202: } else {
1.3 misha 203: // class which does not have methods (env, console, etc)
1.1 misha 204: }
205: r.write_no_lang(result);
206: }
207:
1.28 misha 208: static void _method(Request& r, MethodParams& params) {
209: Value& o=params.as_no_junction(0, "first param must be object or class, not junction");
210: const String& name=params.as_string(1, "method name must be string");
211:
212: if(VStateless_class* lclass=o.get_class()) {
213: if(Method* method=lclass->get_method(name))
214: r.write_no_lang(*method->get_vjunction(o));
215: } else {
216: // class which does not have methods (env, console, etc)
217: }
218: }
219:
1.13 misha 220: static void _fields(Request& r, MethodParams& params) {
1.28 misha 221: Value& o=params.as_no_junction(0, "param must be object or class, not junction");
222:
1.44 moko 223: if(HashStringValue* fields=o.get_fields())
224: r.write_no_lang(*new VHash(*fields));
225: else
1.13 misha 226: r.write_no_lang(*new VHash());
227: }
1.2 misha 228:
1.44 moko 229: static void _fields_reference(Request& r, MethodParams& params) {
1.46 moko 230: Value& o=params.as_no_junction(0, "param must be object or hash, not junction");
1.44 moko 231:
1.45 moko 232: if(HashStringValue* fields=o.get_fields_reference())
1.44 moko 233: r.write_no_lang(*new VHashReference(*fields));
234: else
1.46 moko 235: throw Exception(PARSER_RUNTIME, 0, "param must be object or hash");
1.44 moko 236: }
237:
1.28 misha 238: static void _field(Request& r, MethodParams& params) {
239: Value& o=params.as_no_junction(0, "first param must be object or class, not junction");
240: const String& name=params.as_string(1, "field name must be string");
241:
242: if(HashStringValue* fields=o.get_fields())
243: if(Value* value=fields->get(name))
244: r.write_no_lang(*value);
245: }
246:
1.8 misha 247: static void _method_info(Request& r, MethodParams& params) {
1.2 misha 248: const String& class_name=params.as_string(0, "class_name must be string");
1.11 misha 249: Value* class_value=r.get_class(class_name);
1.2 misha 250: if(!class_value)
1.44 moko 251: throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
1.2 misha 252:
253: VStateless_class* lclass=class_value->get_class();
254: if(!lclass)
1.44 moko 255: throw Exception(PARSER_RUNTIME, &class_name, "class does not have methods");
1.2 misha 256:
257: const String& method_name=params.as_string(1, "method_name must be string");
258: Method* method=lclass->get_method(method_name);
259: if(!method)
1.44 moko 260: throw Exception(PARSER_RUNTIME, &method_name, "method not found in class %s", class_name.cstr());
1.2 misha 261:
262: VHash& result=*new VHash;
263: HashStringValue* hash=result.get_hash();
1.8 misha 264:
265: VStateless_class* c=lclass;
1.23 misha 266: Method* base_method;
267: if(c->base() && (base_method=c->base()->get_method(method_name))){
1.8 misha 268: c=c->base()->get_class();
1.23 misha 269: while(c->base() && base_method==c->base()->get_method(method_name))
270: c=c->base()->get_class();
1.41 moko 271: hash->put((base_method==method) ? method_inherited : method_overridden, new VString(*new String(c->type())));
1.23 misha 272: }
1.8 misha 273:
1.29 misha 274: Value* call_type=0;
275: switch(method->call_type){
276: case Method::CT_DYNAMIC:
1.42 moko 277: call_type=new VString(Symbols::DYNAMIC_SYMBOL);
1.29 misha 278: break;
279: case Method::CT_STATIC:
1.42 moko 280: call_type=new VString(Symbols::STATIC_SYMBOL);
1.29 misha 281: break;
1.32 moko 282: case Method::CT_ANY:
283: break;
1.29 misha 284: }
285: if(call_type)
286: hash->put(method_call_type, call_type);
287:
1.2 misha 288: if(method->native_code){
289: // native code
290: hash->put(method_min_params, new VInt(method->min_numbered_params_count));
291: hash->put(method_max_params, new VInt(method->max_numbered_params_count));
292: } else {
293: // parser code
1.16 misha 294: const String* filespec = r.get_method_filename(method);
295: if( filespec )
296: hash->put("file", new VString(*filespec));
1.29 misha 297:
298: hash->put(method_max_params, new VInt(method->params_names ? method->params_names->count() : 0));
299:
1.2 misha 300: if(method->params_names)
301: for(size_t i=0; i<method->params_names->count(); i++)
302: hash->put(String::Body::Format(i), new VString(*method->params_names->get(i)));
1.29 misha 303:
304: if(method->extra_params)
305: hash->put(method_extra_param, new VString(*method->extra_params));
1.2 misha 306: }
307:
308: r.write_no_lang(result);
309: }
310:
1.9 misha 311: static void _dynamical(Request& r, MethodParams& params) {
312: if(params.count()){
313: r.write_no_lang(VBool::get(params[0].get_class() != ¶ms[0]));
314: } else {
315: VMethodFrame* caller=r.get_method_frame()->caller();
316: r.write_no_lang(VBool::get(caller && caller->get_class() != &caller->self()));
317: }
318: }
319:
1.35 moko 320: static void _is(Request& r, MethodParams& params) {
1.39 moko 321: const String& name=params.as_string(0, "element name must be string");
322: const String& type=params.as_string(1, "class name must be string");
323: Value *context=params.count()==3 ? &(params.as_no_junction(2, "context must not be code")) : r.get_method_frame()->caller();
1.37 moko 324: Value *value=context ? context->get_element(name) : 0;
1.35 moko 325:
326: if(value) {
327: if(type == "code" || type == "method") {
328: Junction *junction=value->get_junction();
329: r.write_no_lang(VBool::get(junction && ((junction->code==0) ^ (type == "code"))) );
330: } else {
331: r.write_no_lang(VBool::get( value->is(type.cstr()) ));
332: }
333: } else
1.36 moko 334: r.write_no_lang(VBool::get(type == "void"));
1.35 moko 335: }
336:
1.19 moko 337: static void _copy(Request& r, MethodParams& params) {
338: HashStringValue* src=params.as_no_junction(0, "source must not be code").get_hash();
339:
1.44 moko 340: if(src==NULL)
1.19 moko 341: throw Exception(PARSER_RUNTIME, 0, "source must have hash representation");
342:
343: Value& dst=params.as_no_junction(1, "destination must not be code");
344:
345: for(HashStringValue::Iterator i(*src); i; i.next())
1.20 moko 346: r.put_element(dst, *new String(i.key(), String::L_TAINTED), i.value());
1.19 moko 347: }
348:
1.25 moko 349: static void _uid(Request& r, MethodParams& params) {
350: Value& obj=params.as_no_junction(0, "object must not be code");
351:
352: char local_buf[MAX_NUMBER];
353: int size=snprintf(local_buf, sizeof(local_buf), "%p", &obj);
354:
1.33 moko 355: r.write_pass_lang(*new String(String::C(pa_strdup(local_buf, (size_t)size), size)));
1.25 moko 356: }
357:
1.27 moko 358: static void _delete(Request&, MethodParams& params) {
1.26 misha 359: const String& key=params.as_string(1, "field name must be string");
360: if(HashStringValue* fields=params[0].get_fields()){
361: fields->remove(key);
362: }
363: }
364:
365:
1.1 misha 366: // constructor
367: MReflection::MReflection(): Methoded("reflection") {
1.2 misha 368: // ^reflection:create[class_name;constructor_name[;param1[;param2[;...]]]]
369: add_native_method("create", Method::CT_STATIC, _create, 2, 102);
1.1 misha 370:
1.3 misha 371: // ^reflection:classes[]
372: add_native_method("classes", Method::CT_STATIC, _classes, 0, 0);
373:
1.1 misha 374: // ^reflection:class[object]
375: add_native_method("class", Method::CT_STATIC, _class, 1, 1);
376:
377: // ^reflection:class_name[object]
378: add_native_method("class_name", Method::CT_STATIC, _class_name, 1, 1);
379:
1.34 moko 380: // ^reflection:class_by_name[class_name]
381: add_native_method("class_by_name", Method::CT_STATIC, _class_by_name, 1, 1);
382:
1.2 misha 383: // ^reflection:base_class[object]
384: add_native_method("base", Method::CT_STATIC, _base, 1, 1);
385:
386: // ^reflection:base_class_name[object]
387: add_native_method("base_name", Method::CT_STATIC, _base_name, 1, 1);
388:
1.30 misha 389: // ^reflection:def[class|...;name]
390: add_native_method("def", Method::CT_STATIC, _def, 2, 2);
391:
1.2 misha 392: // ^reflection:methods[class_name]
1.1 misha 393: add_native_method("methods", Method::CT_STATIC, _methods, 1, 1);
1.2 misha 394:
1.28 misha 395: // ^reflection:method[object or class;method_name]
396: add_native_method("method", Method::CT_STATIC, _method, 2, 2);
397:
398: // ^reflection:method_info[class_name;method_name]
399: add_native_method("method_info", Method::CT_STATIC, _method_info, 2, 2);
400:
1.13 misha 401: // ^reflection:fields[object or class]
402: add_native_method("fields", Method::CT_STATIC, _fields, 1, 1);
403:
1.44 moko 404: // ^reflection:fields_reference[object]
405: add_native_method("fields_reference", Method::CT_STATIC, _fields_reference, 1, 1);
406:
1.28 misha 407: // ^reflection:field[object or class;field_name]
408: add_native_method("field", Method::CT_STATIC, _field, 2, 2);
1.9 misha 409:
410: // ^reflection:dynamical[[object or class, caller if absent]]
411: add_native_method("dynamical", Method::CT_STATIC, _dynamical, 0, 1);
1.19 moko 412:
1.39 moko 413: // ^reflection:is[element_name;class_name|code|method[;context]]
1.35 moko 414: add_native_method("is", Method::CT_STATIC, _is, 2, 3);
415:
1.19 moko 416: // ^reflection:copy[src;dst]
417: add_native_method("copy", Method::CT_STATIC, _copy, 2, 2);
1.25 moko 418:
419: // ^reflection:uid[object or class]
420: add_native_method("uid", Method::CT_STATIC, _uid, 1, 1);
1.26 misha 421:
422: // ^reflection:delete[object or class;field_name]
423: add_native_method("delete", Method::CT_STATIC, _delete, 2, 2);
1.1 misha 424: }
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