Annotation of parser3/src/classes/reflection.C, revision 1.60
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:
1.60 ! moko 13: volatile const char * IDENT_REFLECTION_C="$Id: reflection.C,v 1.59 2016/09/27 22:01:19 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: if(method->call_type==Method::CT_STATIC)
66: throw Exception(PARSER_RUNTIME,
67: &constructor_name,
1.41 moko 68: "native method of class '%s' is not allowed to be called dynamically",
1.48 moko 69: vclass->type());
1.2 misha 70:
71: if(nparams<method->min_numbered_params_count)
72: throw Exception(PARSER_RUNTIME,
73: &constructor_name,
1.41 moko 74: "native method of class '%s' accepts minimum %d parameter(s) (%d passed)",
1.48 moko 75: vclass->type(),
1.2 misha 76: method->min_numbered_params_count,
77: nparams);
78:
79: max_params_count=method->max_numbered_params_count;
80: } else {
1.12 misha 81: max_params_count=method->params_names?method->params_names->count():0;
1.2 misha 82: }
83:
84: if(nparams>max_params_count)
85: throw Exception(PARSER_RUNTIME,
86: &constructor_name,
1.41 moko 87: "method of class '%s' accepts maximum %d parameter(s) (%d passed)",
1.48 moko 88: vclass->type(),
1.2 misha 89: max_params_count,
90: nparams);
1.1 misha 91:
1.48 moko 92: Value &object = r.construct(*vclass, *method);
1.17 moko 93: VConstructorFrame frame(*method, r.get_method_frame(), object);
1.1 misha 94:
1.3 misha 95: Value* v[100];
1.1 misha 96: if(nparams>0){
1.2 misha 97: for(int i=0; i<nparams; i++)
1.1 misha 98: v[i]=&r.process_to_value(params[i+2]);
99: frame.store_params((Value**)&v, nparams);
100: } else {
101: frame.empty_params();
102: }
1.17 moko 103: r.op_call(frame);
1.18 moko 104: object.enable_default_setter();
1.21 moko 105: r.write_pass_lang(frame.result());
1.1 misha 106: }
107:
1.2 misha 108:
1.3 misha 109: static void _classes(Request& r, MethodParams&) {
110: VHash& result=*new VHash;
1.47 moko 111: for(HashString<VStateless_class*>::Iterator i(r.classes()); i; i.next()){
112: result.hash().put(i.key(), i.value()->get_methods().count()>0 ? new VString(class_type_methoded) : VVoid::get() );
113: }
1.3 misha 114: r.write_no_lang(result);
115: }
116:
117:
1.53 moko 118: static Value& get_class(Value& value){
119: if(VStateless_class* result=value.get_class())
120: return *result;
121: else {
122: // we can't return code junction to outside as it's stack value
123: if(Junction *j=value.get_junction())
124: if(j->code)
125: throw Exception(PARSER_RUNTIME, 0, "param must not be code junction");
126: // method junction
1.3 misha 127: return value;
1.53 moko 128: }
1.3 misha 129: }
130:
1.53 moko 131: static const String& get_class_name(Value& value){
132: return *new String(get_class(value).type());
1.3 misha 133: }
134:
135:
1.1 misha 136: static void _class(Request& r, MethodParams& params) {
1.53 moko 137: r.write_no_lang(get_class(params[0]));
1.1 misha 138: }
139:
1.2 misha 140:
1.1 misha 141: static void _class_name(Request& r, MethodParams& params) {
1.53 moko 142: r.write_no_lang(get_class_name(params[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) {
1.49 moko 154: if(VStateless_class* vclass=params[0].get_class())
155: if(Value* base=vclass->base()){
1.53 moko 156: r.write_no_lang(get_class(*base));
1.3 misha 157: return;
158: }
159:
160: // classes with fields only, like env & console or without base
1.52 moko 161: r.write_value(*VVoid::get());
1.2 misha 162: }
1.1 misha 163:
164:
1.2 misha 165: static void _base_name(Request& r, MethodParams& params) {
1.49 moko 166: if(VStateless_class* vclass=params[0].get_class())
167: if(Value* base=vclass->base())
1.53 moko 168: r.write_no_lang(get_class_name(*base));
1.2 misha 169: }
1.1 misha 170:
1.30 misha 171: static void _def(Request& r, MethodParams& params) {
172: const String& type=params.as_string(0, "type must be string");
173: if(type == def_class) {
174: const String& name=params.as_string(1, "name must be string");
1.47 moko 175: // can't use get_class because it will call @autouse[] if the class wasn't loaded
1.43 moko 176: r.write_no_lang(VBool::get(r.classes().get(name)!=0));
1.30 misha 177: } else {
1.31 misha 178: throw Exception(PARSER_RUNTIME, &type, "is invalid type, must be '%s'", def_class.cstr());
1.30 misha 179: }
180: }
181:
1.1 misha 182: static void _methods(Request& r, MethodParams& params) {
183: const String& class_name=params.as_string(0, "class_name must be string");
1.49 moko 184: VStateless_class* vclass=r.get_class(class_name);
185: if(!vclass)
186: throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
1.1 misha 187:
188: VHash& result=*new VHash;
1.49 moko 189: for(HashStringMethod::Iterator i(vclass->get_methods()); i; i.next()){
190: result.hash().put(i.key(), new VString(i.value()->native_code ? method_type_native : method_type_parser));
1.1 misha 191: }
1.49 moko 192:
1.1 misha 193: r.write_no_lang(result);
194: }
195:
1.57 moko 196: static VJunction &method_junction(Value &self, Method &method){
1.50 moko 197: if(method.native_code)
1.57 moko 198: throw Exception(PARSER_RUNTIME, method.name, "method must not be native");
1.50 moko 199:
1.51 moko 200: if(!(dynamic_cast<VObject*>(&self) || dynamic_cast<VClass*>(&self)))
201: throw Exception(PARSER_RUNTIME, 0, "self must be parser object or class");
1.50 moko 202:
203: return *method.get_vjunction(self);
204: }
205:
1.28 misha 206: static void _method(Request& r, MethodParams& params) {
1.50 moko 207: Value &source=*params.get(0);
208:
209: if(Junction *j=source.get_junction()){
210: if(Method* method=const_cast<Method*>(j->method)){
211: Value& self=params.count()>1 ? params.as_no_junction(1, "self must be object, not junction") : r.get_method_frame()->caller()->self();
212: r.write_no_lang(method_junction(self, *method));
213: return;
214: }
1.51 moko 215: throw Exception(PARSER_RUNTIME, 0, "param must be method junction");
1.50 moko 216: }
217:
218: if(params.count()==1)
1.51 moko 219: throw Exception(PARSER_RUNTIME, 0, "method name must be specified");
1.50 moko 220:
1.28 misha 221: const String& name=params.as_string(1, "method name must be string");
222:
1.50 moko 223: if(VStateless_class* vclass=source.get_class()) {
224: if(Method* method=vclass->get_method(name)){
1.57 moko 225: r.write_no_lang( params.count()>2 ? method_junction(params.as_no_junction(2, "self must be object, not junction"), *method) : *method->get_vjunction(source) );
1.50 moko 226: return;
227: }
1.28 misha 228: }
1.52 moko 229: r.write_value(*VVoid::get());
1.28 misha 230: }
231:
1.13 misha 232: static void _fields(Request& r, MethodParams& params) {
1.28 misha 233: Value& o=params.as_no_junction(0, "param must be object or class, not junction");
234:
1.44 moko 235: if(HashStringValue* fields=o.get_fields())
236: r.write_no_lang(*new VHash(*fields));
237: else
1.13 misha 238: r.write_no_lang(*new VHash());
239: }
1.2 misha 240:
1.44 moko 241: static void _fields_reference(Request& r, MethodParams& params) {
1.46 moko 242: Value& o=params.as_no_junction(0, "param must be object or hash, not junction");
1.44 moko 243:
1.45 moko 244: if(HashStringValue* fields=o.get_fields_reference())
1.44 moko 245: r.write_no_lang(*new VHashReference(*fields));
246: else
1.46 moko 247: throw Exception(PARSER_RUNTIME, 0, "param must be object or hash");
1.44 moko 248: }
249:
1.28 misha 250: static void _field(Request& r, MethodParams& params) {
251: Value& o=params.as_no_junction(0, "first param must be object or class, not junction");
252: const String& name=params.as_string(1, "field name must be string");
253:
254: if(HashStringValue* fields=o.get_fields())
255: if(Value* value=fields->get(name))
256: r.write_no_lang(*value);
257: }
258:
1.8 misha 259: static void _method_info(Request& r, MethodParams& params) {
1.59 moko 260: const Method* method;
261: VStateless_class* vclass=0;
1.2 misha 262:
1.59 moko 263: if(Junction *j=params.get(0)->get_junction()){
264: if(!(method=j->method))
265: throw Exception(PARSER_RUNTIME, 0, "param must be class name or method junction");
266: } else {
267: const String& class_name=params.as_string(0, "param must be class name or method junction");
268: if(!(vclass=r.get_class(class_name)))
269: throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
270:
271: if(params.count()==1)
272: throw Exception(PARSER_RUNTIME, 0, "method name must be specified");
273:
274: const String& method_name=params.as_string(1, "method name must be string");
275: if(!(method=vclass->get_method(method_name)))
276: throw Exception(PARSER_RUNTIME, &method_name, "method not found in class '%s'", vclass->type());
277: }
1.2 misha 278:
279: VHash& result=*new VHash;
280: HashStringValue* hash=result.get_hash();
1.59 moko 281: hash->put(method_name, new VString(*method->name));
1.8 misha 282:
1.23 misha 283: Method* base_method;
1.59 moko 284: if(vclass && vclass->base() && (base_method=vclass->base()->get_method(*method->name))){
285: VStateless_class* c=vclass->base()->get_class();
286: while(c->base() && base_method==c->base()->get_method(*method->name))
1.23 misha 287: c=c->base()->get_class();
1.41 moko 288: hash->put((base_method==method) ? method_inherited : method_overridden, new VString(*new String(c->type())));
1.23 misha 289: }
1.8 misha 290:
1.29 misha 291: Value* call_type=0;
292: switch(method->call_type){
293: case Method::CT_DYNAMIC:
1.42 moko 294: call_type=new VString(Symbols::DYNAMIC_SYMBOL);
1.29 misha 295: break;
296: case Method::CT_STATIC:
1.42 moko 297: call_type=new VString(Symbols::STATIC_SYMBOL);
1.29 misha 298: break;
1.32 moko 299: case Method::CT_ANY:
300: break;
1.29 misha 301: }
302: if(call_type)
303: hash->put(method_call_type, call_type);
304:
1.2 misha 305: if(method->native_code){
306: // native code
307: hash->put(method_min_params, new VInt(method->min_numbered_params_count));
308: hash->put(method_max_params, new VInt(method->max_numbered_params_count));
309: } else {
310: // parser code
1.16 misha 311: const String* filespec = r.get_method_filename(method);
312: if( filespec )
313: hash->put("file", new VString(*filespec));
1.29 misha 314:
315: hash->put(method_max_params, new VInt(method->params_names ? method->params_names->count() : 0));
316:
1.2 misha 317: if(method->params_names)
318: for(size_t i=0; i<method->params_names->count(); i++)
319: hash->put(String::Body::Format(i), new VString(*method->params_names->get(i)));
1.29 misha 320:
321: if(method->extra_params)
322: hash->put(method_extra_param, new VString(*method->extra_params));
1.2 misha 323: }
324:
325: r.write_no_lang(result);
326: }
327:
1.9 misha 328: static void _dynamical(Request& r, MethodParams& params) {
329: if(params.count()){
330: r.write_no_lang(VBool::get(params[0].get_class() != ¶ms[0]));
331: } else {
332: VMethodFrame* caller=r.get_method_frame()->caller();
333: r.write_no_lang(VBool::get(caller && caller->get_class() != &caller->self()));
334: }
335: }
336:
1.35 moko 337: static void _is(Request& r, MethodParams& params) {
1.39 moko 338: const String& name=params.as_string(0, "element name must be string");
339: const String& type=params.as_string(1, "class name must be string");
340: Value *context=params.count()==3 ? &(params.as_no_junction(2, "context must not be code")) : r.get_method_frame()->caller();
1.37 moko 341: Value *value=context ? context->get_element(name) : 0;
1.35 moko 342:
343: if(value) {
344: if(type == "code" || type == "method") {
345: Junction *junction=value->get_junction();
346: r.write_no_lang(VBool::get(junction && ((junction->code==0) ^ (type == "code"))) );
347: } else {
348: r.write_no_lang(VBool::get( value->is(type.cstr()) ));
349: }
350: } else
1.36 moko 351: r.write_no_lang(VBool::get(type == "void"));
1.35 moko 352: }
353:
1.19 moko 354: static void _copy(Request& r, MethodParams& params) {
355: HashStringValue* src=params.as_no_junction(0, "source must not be code").get_hash();
356:
1.44 moko 357: if(src==NULL)
1.19 moko 358: throw Exception(PARSER_RUNTIME, 0, "source must have hash representation");
359:
360: Value& dst=params.as_no_junction(1, "destination must not be code");
361:
362: for(HashStringValue::Iterator i(*src); i; i.next())
1.20 moko 363: r.put_element(dst, *new String(i.key(), String::L_TAINTED), i.value());
1.19 moko 364: }
365:
1.25 moko 366: static void _uid(Request& r, MethodParams& params) {
367: Value& obj=params.as_no_junction(0, "object must not be code");
368:
369: char local_buf[MAX_NUMBER];
370: int size=snprintf(local_buf, sizeof(local_buf), "%p", &obj);
371:
1.33 moko 372: r.write_pass_lang(*new String(String::C(pa_strdup(local_buf, (size_t)size), size)));
1.25 moko 373: }
374:
1.27 moko 375: static void _delete(Request&, MethodParams& params) {
1.58 moko 376: Value* v=¶ms.as_no_junction(0, "param must be object or class, not junction");
1.26 misha 377: const String& key=params.as_string(1, "field name must be string");
1.58 moko 378:
379: if(VObject* o=dynamic_cast<VObject*>(v)){
380: o->get_fields()->remove(key);
381: } else if(VClass* c=dynamic_cast<VClass*>(v)){
382: HashStringProperty &p=*c->get_properties();
383: if(Property* property=p.get(key))
384: if(property->value)
385: p.remove(key);
1.26 misha 386: }
387: }
388:
1.55 moko 389: static void _mixin(Request& r, MethodParams& params) {
390: Value& vsource=params.as_no_junction(0, "source must not be code");
391:
392: Value* vtarget=0;
393: const String *name=0;
394: bool copy_methods=true;
395: bool copy_fields=true;
1.60 ! moko 396: bool overwrite=false;
1.55 moko 397:
398: if(params.count()>1)
399: if(HashStringValue* options=params.as_hash(1, "mixin options")) {
400: int valid_options=0;
401: if(vtarget=options->get("to")) {
402: valid_options++;
403: }
404: if(Value* vname=options->get("name")) {
405: name=&vname->as_string();
406: valid_options++;
407: }
408: if(Value* vmethods=options->get("methods")) {
409: copy_methods=r.process_to_value(*vmethods).as_bool();
410: valid_options++;
411: }
412: if(Value* vfields=options->get("fields")) {
413: copy_fields=r.process_to_value(*vfields).as_bool();
414: valid_options++;
415: }
416: if(Value* voverwrite=options->get("overwrite")) {
417: overwrite=r.process_to_value(*voverwrite).as_bool();
418: valid_options++;
419: }
420: if(valid_options!=options->count())
421: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
422: }
423:
424: if(!vtarget)
425: vtarget=&r.get_method_frame()->caller()->self();
426:
427: VClass* source=dynamic_cast<VClass*>(vsource.get_class());
428: VClass* target=dynamic_cast<VClass*>(vtarget->get_class());
429:
430: if(!source)
431: throw Exception(PARSER_RUNTIME, 0, "source must be parser object or class");
432: if(!target)
433: throw Exception(PARSER_RUNTIME, 0, "destination must be parser object or class");
434:
435: if(name){
436: if(copy_methods)
437: if(Method* method=source->get_method(*name))
438: if(overwrite || !target->get_method(*name)){
1.59 moko 439: target->set_method(*name, new Method(*method));
1.55 moko 440: }
441:
442: if(copy_fields)
443: if(Property* property=source->get_properties()->get(*name))
444: if(property->value && (overwrite || !target->get_properties()->get(*name))){
445: target->put_element(*target, *name, property->value);
446: }
447:
448: } else {
449: if(copy_methods)
450: for(HashStringMethod::Iterator i(source->get_methods()); i; i.next()){
451: if(overwrite || !target->get_method(i.key()))
1.59 moko 452: target->set_method(*i.value()->name, new Method(*i.value()));
1.55 moko 453: }
454: if(copy_fields)
455: for(HashStringProperty::Iterator i(*source->get_properties()); i; i.next()){
456: if(i.value()->value && ( overwrite || !target->get_properties()->get(i.key()) ))
457: target->put_element(*target, *new String(i.key(), String::L_TAINTED), i.value()->value);
458: }
459: }
460: }
461:
1.26 misha 462:
1.1 misha 463: // constructor
464: MReflection::MReflection(): Methoded("reflection") {
1.2 misha 465: // ^reflection:create[class_name;constructor_name[;param1[;param2[;...]]]]
466: add_native_method("create", Method::CT_STATIC, _create, 2, 102);
1.1 misha 467:
1.3 misha 468: // ^reflection:classes[]
469: add_native_method("classes", Method::CT_STATIC, _classes, 0, 0);
470:
1.1 misha 471: // ^reflection:class[object]
472: add_native_method("class", Method::CT_STATIC, _class, 1, 1);
473:
474: // ^reflection:class_name[object]
475: add_native_method("class_name", Method::CT_STATIC, _class_name, 1, 1);
476:
1.34 moko 477: // ^reflection:class_by_name[class_name]
478: add_native_method("class_by_name", Method::CT_STATIC, _class_by_name, 1, 1);
479:
1.2 misha 480: // ^reflection:base_class[object]
481: add_native_method("base", Method::CT_STATIC, _base, 1, 1);
482:
483: // ^reflection:base_class_name[object]
484: add_native_method("base_name", Method::CT_STATIC, _base_name, 1, 1);
485:
1.30 misha 486: // ^reflection:def[class|...;name]
487: add_native_method("def", Method::CT_STATIC, _def, 2, 2);
488:
1.2 misha 489: // ^reflection:methods[class_name]
1.1 misha 490: add_native_method("methods", Method::CT_STATIC, _methods, 1, 1);
1.2 misha 491:
1.54 moko 492: // ^reflection:method[object or class;method_name[;self]]
493: // ^reflection:method[junction[;self]]
1.50 moko 494: add_native_method("method", Method::CT_STATIC, _method, 1, 3);
1.28 misha 495:
496: // ^reflection:method_info[class_name;method_name]
1.59 moko 497: // ^reflection:method_info[junction]
498: add_native_method("method_info", Method::CT_STATIC, _method_info, 1, 2);
1.28 misha 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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