Annotation of parser3/src/classes/reflection.C, revision 1.70
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"
1.50 moko 11: #include "pa_vobject.h"
1.1 misha 12:
1.70 ! moko 13: volatile const char * IDENT_REFLECTION_C="$Id: reflection.C,v 1.69 2016/11/29 23:25:59 moko Exp $";
1.24 moko 14:
1.3 misha 15: static const String class_type_methoded("methoded");
1.2 misha 16:
1.3 misha 17: static const String method_type_native("native");
18: static const String method_type_parser("parser");
1.2 misha 19:
1.59 moko 20: static const String method_name("name");
1.5 misha 21: static const String method_call_type("call_type");
1.8 misha 22: static const String method_inherited("inherited");
1.23 misha 23: static const String method_overridden("overridden");
1.2 misha 24:
1.3 misha 25: static const String method_min_params("min_params");
26: static const String method_max_params("max_params");
1.29 misha 27: static const String method_extra_param("extra_param");
1.2 misha 28:
1.30 misha 29: static const String def_class("class");
30:
1.1 misha 31: // class
32:
33: class MReflection: public Methoded {
34: public:
35: MReflection();
36: };
37:
38: // global variable
39:
1.40 moko 40: DECLARE_CLASS_VAR(reflection, new MReflection);
1.1 misha 41:
42: // methods
43:
1.2 misha 44:
45: static void _create(Request& r, MethodParams& params) {
1.1 misha 46: const String& class_name=params.as_string(0, "class_name must be string");
1.48 moko 47: VStateless_class* vclass=r.get_class(class_name);
1.1 misha 48:
1.48 moko 49: if(!vclass)
50: throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
1.1 misha 51:
52: const String& constructor_name=params.as_string(1, "constructor_name must be string");
1.48 moko 53: Value* constructor_value=vclass->get_element(constructor_name);
1.1 misha 54:
1.10 misha 55: if(!constructor_value || !constructor_value->get_junction())
1.50 moko 56: throw Exception(PARSER_RUNTIME, &constructor_name, "constructor must be declared in class '%s'", vclass->type());
1.1 misha 57:
58: Junction* junction=constructor_value->get_junction();
1.2 misha 59: const Method* method=junction->method;
60:
61: int nparams=params.count()-2;
62: int max_params_count;
63:
64: if(method->native_code){
65: max_params_count=method->max_numbered_params_count;
66: } else {
1.65 moko 67: max_params_count=method->params_count;
1.2 misha 68: }
69:
1.48 moko 70: Value &object = r.construct(*vclass, *method);
1.1 misha 71:
1.65 moko 72: CONSTRUCTOR_FRAME_ACTION(*method, r.get_method_frame(), object, {
73: Value* v[100];
74: if(nparams>0){
75: for(int i=0; i<nparams; i++)
76: v[i]=&r.process(params[i+2]);
77: frame.store_params((Value**)&v, nparams);
78: } else {
79: frame.empty_params();
80: }
81: r.call(frame);
82: object.enable_default_setter();
83: r.write(frame.result());
84: });
1.1 misha 85: }
86:
1.2 misha 87:
1.3 misha 88: static void _classes(Request& r, MethodParams&) {
89: VHash& result=*new VHash;
1.47 moko 90: for(HashString<VStateless_class*>::Iterator i(r.classes()); i; i.next()){
91: result.hash().put(i.key(), i.value()->get_methods().count()>0 ? new VString(class_type_methoded) : VVoid::get() );
92: }
1.64 moko 93: r.write(result);
1.3 misha 94: }
95:
96:
1.53 moko 97: static Value& get_class(Value& value){
98: if(VStateless_class* result=value.get_class())
99: return *result;
100: else {
101: // we can't return code junction to outside as it's stack value
102: if(Junction *j=value.get_junction())
103: if(j->code)
104: throw Exception(PARSER_RUNTIME, 0, "param must not be code junction");
105: // method junction
1.3 misha 106: return value;
1.53 moko 107: }
1.3 misha 108: }
109:
1.53 moko 110: static const String& get_class_name(Value& value){
111: return *new String(get_class(value).type());
1.3 misha 112: }
113:
114:
1.1 misha 115: static void _class(Request& r, MethodParams& params) {
1.64 moko 116: r.write(get_class(params[0]));
1.1 misha 117: }
118:
1.2 misha 119:
1.1 misha 120: static void _class_name(Request& r, MethodParams& params) {
1.64 moko 121: r.write(get_class_name(params[0]));
1.1 misha 122: }
123:
1.34 moko 124: static void _class_by_name(Request& r, MethodParams& params) {
125: const String& class_name=params.as_string(0, "class_name must be string");
126: Value* class_value=r.get_class(class_name);
127: if(!class_value)
128: throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
1.64 moko 129: r.write(*class_value);
1.34 moko 130: }
1.1 misha 131:
1.2 misha 132: static void _base(Request& r, MethodParams& params) {
1.49 moko 133: if(VStateless_class* vclass=params[0].get_class())
134: if(Value* base=vclass->base()){
1.64 moko 135: r.write(get_class(*base));
1.3 misha 136: return;
137: }
138:
139: // classes with fields only, like env & console or without base
1.52 moko 140: r.write_value(*VVoid::get());
1.2 misha 141: }
1.1 misha 142:
143:
1.2 misha 144: static void _base_name(Request& r, MethodParams& params) {
1.49 moko 145: if(VStateless_class* vclass=params[0].get_class())
146: if(Value* base=vclass->base())
1.64 moko 147: r.write(get_class_name(*base));
1.2 misha 148: }
1.1 misha 149:
1.30 misha 150: static void _def(Request& r, MethodParams& params) {
151: const String& type=params.as_string(0, "type must be string");
152: if(type == def_class) {
153: const String& name=params.as_string(1, "name must be string");
1.47 moko 154: // can't use get_class because it will call @autouse[] if the class wasn't loaded
1.64 moko 155: r.write(VBool::get(r.classes().get(name)!=0));
1.30 misha 156: } else {
1.31 misha 157: throw Exception(PARSER_RUNTIME, &type, "is invalid type, must be '%s'", def_class.cstr());
1.30 misha 158: }
159: }
160:
1.1 misha 161: static void _methods(Request& r, MethodParams& params) {
162: const String& class_name=params.as_string(0, "class_name must be string");
1.49 moko 163: VStateless_class* vclass=r.get_class(class_name);
164: if(!vclass)
165: throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
1.1 misha 166:
167: VHash& result=*new VHash;
1.49 moko 168: for(HashStringMethod::Iterator i(vclass->get_methods()); i; i.next()){
169: result.hash().put(i.key(), new VString(i.value()->native_code ? method_type_native : method_type_parser));
1.1 misha 170: }
1.49 moko 171:
1.64 moko 172: r.write(result);
1.1 misha 173: }
174:
1.57 moko 175: static VJunction &method_junction(Value &self, Method &method){
1.50 moko 176: if(method.native_code)
1.57 moko 177: throw Exception(PARSER_RUNTIME, method.name, "method must not be native");
1.50 moko 178:
1.51 moko 179: if(!(dynamic_cast<VObject*>(&self) || dynamic_cast<VClass*>(&self)))
180: throw Exception(PARSER_RUNTIME, 0, "self must be parser object or class");
1.50 moko 181:
182: return *method.get_vjunction(self);
183: }
184:
1.28 misha 185: static void _method(Request& r, MethodParams& params) {
1.62 moko 186: Value &source=params[0];
1.50 moko 187:
188: if(Junction *j=source.get_junction()){
189: if(Method* method=const_cast<Method*>(j->method)){
190: Value& self=params.count()>1 ? params.as_no_junction(1, "self must be object, not junction") : r.get_method_frame()->caller()->self();
1.64 moko 191: r.write(method_junction(self, *method));
1.50 moko 192: return;
193: }
1.51 moko 194: throw Exception(PARSER_RUNTIME, 0, "param must be method junction");
1.50 moko 195: }
196:
197: if(params.count()==1)
1.51 moko 198: throw Exception(PARSER_RUNTIME, 0, "method name must be specified");
1.50 moko 199:
1.28 misha 200: const String& name=params.as_string(1, "method name must be string");
201:
1.50 moko 202: if(VStateless_class* vclass=source.get_class()) {
203: if(Method* method=vclass->get_method(name)){
1.64 moko 204: r.write( params.count()>2 ? method_junction(params.as_no_junction(2, "self must be object, not junction"), *method) : *method->get_vjunction(source) );
1.50 moko 205: return;
206: }
1.28 misha 207: }
1.52 moko 208: r.write_value(*VVoid::get());
1.28 misha 209: }
210:
1.13 misha 211: static void _fields(Request& r, MethodParams& params) {
1.28 misha 212: Value& o=params.as_no_junction(0, "param must be object or class, not junction");
213:
1.44 moko 214: if(HashStringValue* fields=o.get_fields())
1.64 moko 215: r.write(*new VHash(*fields));
1.44 moko 216: else
1.64 moko 217: r.write(*new VHash());
1.13 misha 218: }
1.2 misha 219:
1.44 moko 220: static void _fields_reference(Request& r, MethodParams& params) {
1.46 moko 221: Value& o=params.as_no_junction(0, "param must be object or hash, not junction");
1.44 moko 222:
1.45 moko 223: if(HashStringValue* fields=o.get_fields_reference())
1.64 moko 224: r.write(*new VHashReference(*fields));
1.44 moko 225: else
1.46 moko 226: throw Exception(PARSER_RUNTIME, 0, "param must be object or hash");
1.44 moko 227: }
228:
1.28 misha 229: static void _field(Request& r, MethodParams& params) {
230: Value& o=params.as_no_junction(0, "first param must be object or class, not junction");
231: const String& name=params.as_string(1, "field name must be string");
232:
233: if(HashStringValue* fields=o.get_fields())
234: if(Value* value=fields->get(name))
1.64 moko 235: r.write(*value);
1.28 misha 236: }
237:
1.8 misha 238: static void _method_info(Request& r, MethodParams& params) {
1.59 moko 239: const Method* method;
1.66 moko 240:
241: VHash& result=*new VHash;
242: HashStringValue* hash=result.get_hash();
1.2 misha 243:
1.62 moko 244: if(Junction *j=params[0].get_junction()){
1.59 moko 245: if(!(method=j->method))
246: throw Exception(PARSER_RUNTIME, 0, "param must be class name or method junction");
1.66 moko 247:
248: hash->put(method_name, new VString(*method->name));
1.59 moko 249: } else {
250: const String& class_name=params.as_string(0, "param must be class name or method junction");
1.66 moko 251: VStateless_class* vclass=r.get_class(class_name);
252:
253: if(!vclass)
1.59 moko 254: throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
255:
256: if(params.count()==1)
257: throw Exception(PARSER_RUNTIME, 0, "method name must be specified");
258:
259: const String& method_name=params.as_string(1, "method name must be string");
260: if(!(method=vclass->get_method(method_name)))
261: throw Exception(PARSER_RUNTIME, &method_name, "method not found in class '%s'", vclass->type());
1.2 misha 262:
1.66 moko 263: Method* base_method;
264: if(vclass && vclass->base() && (base_method=vclass->base()->get_method(*method->name))){
265: VStateless_class* c=vclass->base()->get_class();
266: while(c->base() && base_method==c->base()->get_method(*method->name))
267: c=c->base()->get_class();
268: hash->put((base_method==method) ? method_inherited : method_overridden, new VString(*new String(c->type())));
269: }
1.23 misha 270: }
1.8 misha 271:
1.29 misha 272: Value* call_type=0;
273: switch(method->call_type){
274: case Method::CT_DYNAMIC:
1.42 moko 275: call_type=new VString(Symbols::DYNAMIC_SYMBOL);
1.29 misha 276: break;
277: case Method::CT_STATIC:
1.42 moko 278: call_type=new VString(Symbols::STATIC_SYMBOL);
1.29 misha 279: break;
1.32 moko 280: case Method::CT_ANY:
281: break;
1.29 misha 282: }
283: if(call_type)
284: hash->put(method_call_type, call_type);
285:
1.2 misha 286: if(method->native_code){
287: // native code
288: hash->put(method_min_params, new VInt(method->min_numbered_params_count));
289: hash->put(method_max_params, new VInt(method->max_numbered_params_count));
290: } else {
291: // parser code
1.68 moko 292: const String* filespec = r.get_method_filespec(method);
1.16 misha 293: if( filespec )
294: hash->put("file", new VString(*filespec));
1.29 misha 295:
296: hash->put(method_max_params, new VInt(method->params_names ? method->params_names->count() : 0));
297:
1.2 misha 298: if(method->params_names)
299: for(size_t i=0; i<method->params_names->count(); i++)
300: hash->put(String::Body::Format(i), new VString(*method->params_names->get(i)));
1.29 misha 301:
302: if(method->extra_params)
303: hash->put(method_extra_param, new VString(*method->extra_params));
1.2 misha 304: }
305:
1.64 moko 306: r.write(result);
1.2 misha 307: }
308:
1.67 moko 309: static void _filename(Request& r, MethodParams& params) {
1.68 moko 310: if(Junction *j=params[0].get_junction()){
311: if(const Method* method=j->method){
312: if(!method->native_code)
313: if(const String* filespec = r.get_method_filespec(method))
314: r.write(*new VString(*filespec));
315: return;
316: }
317: throw Exception(PARSER_RUNTIME, 0, "param must be object, class or method junction");
318: }
1.67 moko 319:
1.68 moko 320: if(VClass* vclass = dynamic_cast<VClass*>(params[0].get_class())){
321: r.write(*new VString(vclass->get_filespec()));
1.67 moko 322: }
323: }
324:
1.9 misha 325: static void _dynamical(Request& r, MethodParams& params) {
326: if(params.count()){
1.64 moko 327: r.write(VBool::get(params[0].get_class() != ¶ms[0]));
1.9 misha 328: } else {
329: VMethodFrame* caller=r.get_method_frame()->caller();
1.64 moko 330: r.write(VBool::get(caller && caller->get_class() != &caller->self()));
1.9 misha 331: }
332: }
333:
1.35 moko 334: static void _is(Request& r, MethodParams& params) {
1.39 moko 335: const String& name=params.as_string(0, "element name must be string");
336: const String& type=params.as_string(1, "class name must be string");
337: Value *context=params.count()==3 ? &(params.as_no_junction(2, "context must not be code")) : r.get_method_frame()->caller();
1.37 moko 338: Value *value=context ? context->get_element(name) : 0;
1.35 moko 339:
340: if(value) {
341: if(type == "code" || type == "method") {
342: Junction *junction=value->get_junction();
1.64 moko 343: r.write(VBool::get(junction && ((junction->code==0) ^ (type == "code"))) );
1.35 moko 344: } else {
1.64 moko 345: r.write(VBool::get( value->is(type.cstr()) ));
1.35 moko 346: }
347: } else
1.64 moko 348: r.write(VBool::get(type == "void"));
1.35 moko 349: }
350:
1.19 moko 351: static void _copy(Request& r, MethodParams& params) {
352: HashStringValue* src=params.as_no_junction(0, "source must not be code").get_hash();
353:
1.44 moko 354: if(src==NULL)
1.19 moko 355: throw Exception(PARSER_RUNTIME, 0, "source must have hash representation");
356:
357: Value& dst=params.as_no_junction(1, "destination must not be code");
358:
359: for(HashStringValue::Iterator i(*src); i; i.next())
1.20 moko 360: r.put_element(dst, *new String(i.key(), String::L_TAINTED), i.value());
1.19 moko 361: }
362:
1.25 moko 363: static void _uid(Request& r, MethodParams& params) {
364: Value& obj=params.as_no_junction(0, "object must not be code");
365:
366: char local_buf[MAX_NUMBER];
367: int size=snprintf(local_buf, sizeof(local_buf), "%p", &obj);
368:
1.64 moko 369: r.write(*new String(String::C(pa_strdup(local_buf, (size_t)size), size)));
1.25 moko 370: }
371:
1.27 moko 372: static void _delete(Request&, MethodParams& params) {
1.58 moko 373: Value* v=¶ms.as_no_junction(0, "param must be object or class, not junction");
1.26 misha 374: const String& key=params.as_string(1, "field name must be string");
1.58 moko 375:
376: if(VObject* o=dynamic_cast<VObject*>(v)){
377: o->get_fields()->remove(key);
378: } else if(VClass* c=dynamic_cast<VClass*>(v)){
379: HashStringProperty &p=*c->get_properties();
380: if(Property* property=p.get(key))
381: if(property->value)
382: p.remove(key);
1.26 misha 383: }
384: }
385:
1.55 moko 386: static void _mixin(Request& r, MethodParams& params) {
387: Value& vsource=params.as_no_junction(0, "source must not be code");
388:
389: Value* vtarget=0;
390: const String *name=0;
391: bool copy_methods=true;
392: bool copy_fields=true;
1.60 moko 393: bool overwrite=false;
1.55 moko 394:
395: if(params.count()>1)
396: if(HashStringValue* options=params.as_hash(1, "mixin options")) {
397: int valid_options=0;
398: if(vtarget=options->get("to")) {
399: valid_options++;
400: }
401: if(Value* vname=options->get("name")) {
402: name=&vname->as_string();
403: valid_options++;
404: }
405: if(Value* vmethods=options->get("methods")) {
1.61 moko 406: copy_methods=r.process(*vmethods).as_bool();
1.55 moko 407: valid_options++;
408: }
409: if(Value* vfields=options->get("fields")) {
1.61 moko 410: copy_fields=r.process(*vfields).as_bool();
1.55 moko 411: valid_options++;
412: }
413: if(Value* voverwrite=options->get("overwrite")) {
1.61 moko 414: overwrite=r.process(*voverwrite).as_bool();
1.55 moko 415: valid_options++;
416: }
417: if(valid_options!=options->count())
418: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
419: }
420:
421: if(!vtarget)
422: vtarget=&r.get_method_frame()->caller()->self();
423:
424: VClass* source=dynamic_cast<VClass*>(vsource.get_class());
425: VClass* target=dynamic_cast<VClass*>(vtarget->get_class());
426:
427: if(!source)
428: throw Exception(PARSER_RUNTIME, 0, "source must be parser object or class");
429: if(!target)
430: throw Exception(PARSER_RUNTIME, 0, "destination must be parser object or class");
431:
432: if(name){
433: if(copy_methods)
434: if(Method* method=source->get_method(*name))
435: if(overwrite || !target->get_method(*name)){
1.59 moko 436: target->set_method(*name, new Method(*method));
1.55 moko 437: }
438:
439: if(copy_fields)
440: if(Property* property=source->get_properties()->get(*name))
441: if(property->value && (overwrite || !target->get_properties()->get(*name))){
442: target->put_element(*target, *name, property->value);
443: }
444:
445: } else {
446: if(copy_methods)
447: for(HashStringMethod::Iterator i(source->get_methods()); i; i.next()){
448: if(overwrite || !target->get_method(i.key()))
1.59 moko 449: target->set_method(*i.value()->name, new Method(*i.value()));
1.55 moko 450: }
451: if(copy_fields)
452: for(HashStringProperty::Iterator i(*source->get_properties()); i; i.next()){
453: if(i.value()->value && ( overwrite || !target->get_properties()->get(i.key()) ))
454: target->put_element(*target, *new String(i.key(), String::L_TAINTED), i.value()->value);
455: }
456: }
457: }
458:
1.26 misha 459:
1.1 misha 460: // constructor
461: MReflection::MReflection(): Methoded("reflection") {
1.2 misha 462: // ^reflection:create[class_name;constructor_name[;param1[;param2[;...]]]]
463: add_native_method("create", Method::CT_STATIC, _create, 2, 102);
1.1 misha 464:
1.3 misha 465: // ^reflection:classes[]
466: add_native_method("classes", Method::CT_STATIC, _classes, 0, 0);
467:
1.1 misha 468: // ^reflection:class[object]
469: add_native_method("class", Method::CT_STATIC, _class, 1, 1);
470:
471: // ^reflection:class_name[object]
472: add_native_method("class_name", Method::CT_STATIC, _class_name, 1, 1);
473:
1.34 moko 474: // ^reflection:class_by_name[class_name]
475: add_native_method("class_by_name", Method::CT_STATIC, _class_by_name, 1, 1);
476:
1.2 misha 477: // ^reflection:base_class[object]
478: add_native_method("base", Method::CT_STATIC, _base, 1, 1);
479:
480: // ^reflection:base_class_name[object]
481: add_native_method("base_name", Method::CT_STATIC, _base_name, 1, 1);
482:
1.30 misha 483: // ^reflection:def[class|...;name]
484: add_native_method("def", Method::CT_STATIC, _def, 2, 2);
485:
1.2 misha 486: // ^reflection:methods[class_name]
1.1 misha 487: add_native_method("methods", Method::CT_STATIC, _methods, 1, 1);
1.2 misha 488:
1.54 moko 489: // ^reflection:method[object or class;method_name[;self]]
490: // ^reflection:method[junction[;self]]
1.50 moko 491: add_native_method("method", Method::CT_STATIC, _method, 1, 3);
1.28 misha 492:
493: // ^reflection:method_info[class_name;method_name]
1.59 moko 494: // ^reflection:method_info[junction]
495: add_native_method("method_info", Method::CT_STATIC, _method_info, 1, 2);
1.28 misha 496:
1.67 moko 497: // ^reflection:filename[object or class]
498: add_native_method("filename", Method::CT_STATIC, _filename, 1, 1);
499:
1.13 misha 500: // ^reflection:fields[object or class]
501: add_native_method("fields", Method::CT_STATIC, _fields, 1, 1);
502:
1.44 moko 503: // ^reflection:fields_reference[object]
504: add_native_method("fields_reference", Method::CT_STATIC, _fields_reference, 1, 1);
505:
1.28 misha 506: // ^reflection:field[object or class;field_name]
507: add_native_method("field", Method::CT_STATIC, _field, 2, 2);
1.9 misha 508:
509: // ^reflection:dynamical[[object or class, caller if absent]]
510: add_native_method("dynamical", Method::CT_STATIC, _dynamical, 0, 1);
1.19 moko 511:
1.39 moko 512: // ^reflection:is[element_name;class_name|code|method[;context]]
1.35 moko 513: add_native_method("is", Method::CT_STATIC, _is, 2, 3);
514:
1.19 moko 515: // ^reflection:copy[src;dst]
516: add_native_method("copy", Method::CT_STATIC, _copy, 2, 2);
1.25 moko 517:
518: // ^reflection:uid[object or class]
519: add_native_method("uid", Method::CT_STATIC, _uid, 1, 1);
1.26 misha 520:
521: // ^reflection:delete[object or class;field_name]
522: add_native_method("delete", Method::CT_STATIC, _delete, 2, 2);
1.54 moko 523:
524: // ^reflection:mixin[object or class or junction;options]
1.55 moko 525: add_native_method("mixin", Method::CT_STATIC, _mixin, 1, 2);
1.54 moko 526:
1.1 misha 527: }
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