Annotation of parser3/src/classes/reflection.C, revision 1.47
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:
1.47 ! moko 12: volatile const char * IDENT_REFLECTION_C="$Id: reflection.C,v 1.46 2016/07/20 14:53:55 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");
1.11 misha 45: Value* class_value=r.get_class(class_name);
1.1 misha 46:
47: if(!class_value)
48: throw Exception(PARSER_RUNTIME,
49: &class_name,
50: "class is undefined");
51:
52: const String& constructor_name=params.as_string(1, "constructor_name must be string");
1.6 misha 53: Value* constructor_value=class_value->get_element(constructor_name);
1.1 misha 54:
1.10 misha 55: if(!constructor_value || !constructor_value->get_junction())
1.1 misha 56: throw Exception(PARSER_RUNTIME,
57: &constructor_name,
58: "constructor must be declared in class '%s'",
1.41 moko 59: class_value->type());
1.1 misha 60:
61: Junction* junction=constructor_value->get_junction();
1.2 misha 62: const Method* method=junction->method;
63:
64: int nparams=params.count()-2;
65: int max_params_count;
66:
67: if(method->native_code){
68: if(method->call_type==Method::CT_STATIC)
69: throw Exception(PARSER_RUNTIME,
70: &constructor_name,
1.41 moko 71: "native method of class '%s' is not allowed to be called dynamically",
1.2 misha 72: class_value->type());
73:
74: if(nparams<method->min_numbered_params_count)
75: throw Exception(PARSER_RUNTIME,
76: &constructor_name,
1.41 moko 77: "native method of class '%s' accepts minimum %d parameter(s) (%d passed)",
1.2 misha 78: class_value->type(),
79: method->min_numbered_params_count,
80: nparams);
81:
82: max_params_count=method->max_numbered_params_count;
83: } else {
1.12 misha 84: max_params_count=method->params_names?method->params_names->count():0;
1.2 misha 85: }
86:
87: if(nparams>max_params_count)
88: throw Exception(PARSER_RUNTIME,
89: &constructor_name,
1.41 moko 90: "method of class '%s' accepts maximum %d parameter(s) (%d passed)",
1.2 misha 91: class_value->type(),
92: max_params_count,
93: nparams);
1.1 misha 94:
1.17 moko 95: Value &object = r.construct(*class_value, *method);
96: VConstructorFrame frame(*method, r.get_method_frame(), object);
1.1 misha 97:
1.3 misha 98: Value* v[100];
1.1 misha 99: if(nparams>0){
1.2 misha 100: for(int i=0; i<nparams; i++)
1.1 misha 101: v[i]=&r.process_to_value(params[i+2]);
102: frame.store_params((Value**)&v, nparams);
103: } else {
104: frame.empty_params();
105: }
1.17 moko 106: r.op_call(frame);
1.18 moko 107: object.enable_default_setter();
1.21 moko 108: r.write_pass_lang(frame.result());
1.1 misha 109: }
110:
1.2 misha 111:
1.3 misha 112: static void _classes(Request& r, MethodParams&) {
113: VHash& result=*new VHash;
1.47 ! moko 114: for(HashString<VStateless_class*>::Iterator i(r.classes()); i; i.next()){
! 115: result.hash().put(i.key(), i.value()->get_methods().count()>0 ? new VString(class_type_methoded) : VVoid::get() );
! 116: }
1.3 misha 117: r.write_no_lang(result);
118: }
119:
120:
121: static Value* get_class(Value* value){
122: if(VStateless_class* result=value->get_class())
123: return result;
124: else
125: // classes with fields only, like env & console
126: return value;
127: }
128:
129: static const String* get_class_name(Value* value){
130: if(VStateless_class* lclass=value->get_class())
1.41 moko 131: return new String(lclass->type());
1.3 misha 132: else
133: // classes with fields only, like env & console
134: return new String(value->type());
135: }
136:
137:
1.1 misha 138: static void _class(Request& r, MethodParams& params) {
1.3 misha 139: r.write_no_lang(*get_class(¶ms[0]));
1.1 misha 140: }
141:
1.2 misha 142:
1.1 misha 143: static void _class_name(Request& r, MethodParams& params) {
1.3 misha 144: r.write_no_lang(*get_class_name(¶ms[0]));
1.1 misha 145: }
146:
1.34 moko 147: static void _class_by_name(Request& r, MethodParams& params) {
148: const String& class_name=params.as_string(0, "class_name must be string");
149: Value* class_value=r.get_class(class_name);
150: if(!class_value)
151: throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
152: r.write_no_lang(*class_value);
153: }
1.1 misha 154:
1.2 misha 155: static void _base(Request& r, MethodParams& params) {
1.3 misha 156: if(VStateless_class* lclass=params[0].get_class())
157: if(Value* base=lclass->base()){
158: r.write_no_lang(*get_class(base));
159: return;
160: }
161:
162: // classes with fields only, like env & console or without base
163: r.write_no_lang(*VVoid::get());
1.2 misha 164: }
1.1 misha 165:
166:
1.2 misha 167: static void _base_name(Request& r, MethodParams& params) {
1.3 misha 168: if(VStateless_class* lclass=params[0].get_class())
1.2 misha 169: if(Value* base=lclass->base())
1.3 misha 170: r.write_no_lang(*get_class_name(base));
1.2 misha 171: }
1.1 misha 172:
1.2 misha 173: static void store_method_info(
1.7 misha 174: HashStringMethod::key_type key,
175: HashStringMethod::value_type method,
1.8 misha 176: HashStringValue* result
1.2 misha 177: ) {
1.8 misha 178: result->put(key, new VString(method->native_code?method_type_native:method_type_parser));
1.1 misha 179: }
180:
1.30 misha 181: static void _def(Request& r, MethodParams& params) {
182: const String& type=params.as_string(0, "type must be string");
183: if(type == def_class) {
184: const String& name=params.as_string(1, "name must be string");
1.47 ! moko 185: // can't use get_class because it will call @autouse[] if the class wasn't loaded
1.43 moko 186: r.write_no_lang(VBool::get(r.classes().get(name)!=0));
1.30 misha 187: } else {
1.31 misha 188: throw Exception(PARSER_RUNTIME, &type, "is invalid type, must be '%s'", def_class.cstr());
1.30 misha 189: }
190: }
191:
1.1 misha 192: static void _methods(Request& r, MethodParams& params) {
193: const String& class_name=params.as_string(0, "class_name must be string");
1.11 misha 194: Value* class_value=r.get_class(class_name);
1.1 misha 195: if(!class_value)
196: throw Exception(PARSER_RUNTIME,
197: &class_name,
198: "class is undefined");
199:
200: VHash& result=*new VHash;
1.28 misha 201: if(VStateless_class* lclass=class_value->get_class()) {
1.7 misha 202: HashStringMethod methods=lclass->get_methods();
1.8 misha 203: methods.for_each(store_method_info, result.get_hash());
1.1 misha 204: } else {
1.3 misha 205: // class which does not have methods (env, console, etc)
1.1 misha 206: }
207: r.write_no_lang(result);
208: }
209:
1.28 misha 210: static void _method(Request& r, MethodParams& params) {
211: Value& o=params.as_no_junction(0, "first param must be object or class, not junction");
212: const String& name=params.as_string(1, "method name must be string");
213:
214: if(VStateless_class* lclass=o.get_class()) {
215: if(Method* method=lclass->get_method(name))
216: r.write_no_lang(*method->get_vjunction(o));
217: } else {
218: // class which does not have methods (env, console, etc)
219: }
220: }
221:
1.13 misha 222: static void _fields(Request& r, MethodParams& params) {
1.28 misha 223: Value& o=params.as_no_junction(0, "param must be object or class, not junction");
224:
1.44 moko 225: if(HashStringValue* fields=o.get_fields())
226: r.write_no_lang(*new VHash(*fields));
227: else
1.13 misha 228: r.write_no_lang(*new VHash());
229: }
1.2 misha 230:
1.44 moko 231: static void _fields_reference(Request& r, MethodParams& params) {
1.46 moko 232: Value& o=params.as_no_junction(0, "param must be object or hash, not junction");
1.44 moko 233:
1.45 moko 234: if(HashStringValue* fields=o.get_fields_reference())
1.44 moko 235: r.write_no_lang(*new VHashReference(*fields));
236: else
1.46 moko 237: throw Exception(PARSER_RUNTIME, 0, "param must be object or hash");
1.44 moko 238: }
239:
1.28 misha 240: static void _field(Request& r, MethodParams& params) {
241: Value& o=params.as_no_junction(0, "first param must be object or class, not junction");
242: const String& name=params.as_string(1, "field name must be string");
243:
244: if(HashStringValue* fields=o.get_fields())
245: if(Value* value=fields->get(name))
246: r.write_no_lang(*value);
247: }
248:
1.8 misha 249: static void _method_info(Request& r, MethodParams& params) {
1.2 misha 250: const String& class_name=params.as_string(0, "class_name must be string");
1.11 misha 251: Value* class_value=r.get_class(class_name);
1.2 misha 252: if(!class_value)
1.44 moko 253: throw Exception(PARSER_RUNTIME, &class_name, "class is undefined");
1.2 misha 254:
255: VStateless_class* lclass=class_value->get_class();
256: if(!lclass)
1.44 moko 257: throw Exception(PARSER_RUNTIME, &class_name, "class does not have methods");
1.2 misha 258:
259: const String& method_name=params.as_string(1, "method_name must be string");
260: Method* method=lclass->get_method(method_name);
261: if(!method)
1.44 moko 262: throw Exception(PARSER_RUNTIME, &method_name, "method not found in class %s", class_name.cstr());
1.2 misha 263:
264: VHash& result=*new VHash;
265: HashStringValue* hash=result.get_hash();
1.8 misha 266:
267: VStateless_class* c=lclass;
1.23 misha 268: Method* base_method;
269: if(c->base() && (base_method=c->base()->get_method(method_name))){
1.8 misha 270: c=c->base()->get_class();
1.23 misha 271: while(c->base() && base_method==c->base()->get_method(method_name))
272: c=c->base()->get_class();
1.41 moko 273: hash->put((base_method==method) ? method_inherited : method_overridden, new VString(*new String(c->type())));
1.23 misha 274: }
1.8 misha 275:
1.29 misha 276: Value* call_type=0;
277: switch(method->call_type){
278: case Method::CT_DYNAMIC:
1.42 moko 279: call_type=new VString(Symbols::DYNAMIC_SYMBOL);
1.29 misha 280: break;
281: case Method::CT_STATIC:
1.42 moko 282: call_type=new VString(Symbols::STATIC_SYMBOL);
1.29 misha 283: break;
1.32 moko 284: case Method::CT_ANY:
285: break;
1.29 misha 286: }
287: if(call_type)
288: hash->put(method_call_type, call_type);
289:
1.2 misha 290: if(method->native_code){
291: // native code
292: hash->put(method_min_params, new VInt(method->min_numbered_params_count));
293: hash->put(method_max_params, new VInt(method->max_numbered_params_count));
294: } else {
295: // parser code
1.16 misha 296: const String* filespec = r.get_method_filename(method);
297: if( filespec )
298: hash->put("file", new VString(*filespec));
1.29 misha 299:
300: hash->put(method_max_params, new VInt(method->params_names ? method->params_names->count() : 0));
301:
1.2 misha 302: if(method->params_names)
303: for(size_t i=0; i<method->params_names->count(); i++)
304: hash->put(String::Body::Format(i), new VString(*method->params_names->get(i)));
1.29 misha 305:
306: if(method->extra_params)
307: hash->put(method_extra_param, new VString(*method->extra_params));
1.2 misha 308: }
309:
310: r.write_no_lang(result);
311: }
312:
1.9 misha 313: static void _dynamical(Request& r, MethodParams& params) {
314: if(params.count()){
315: r.write_no_lang(VBool::get(params[0].get_class() != ¶ms[0]));
316: } else {
317: VMethodFrame* caller=r.get_method_frame()->caller();
318: r.write_no_lang(VBool::get(caller && caller->get_class() != &caller->self()));
319: }
320: }
321:
1.35 moko 322: static void _is(Request& r, MethodParams& params) {
1.39 moko 323: const String& name=params.as_string(0, "element name must be string");
324: const String& type=params.as_string(1, "class name must be string");
325: Value *context=params.count()==3 ? &(params.as_no_junction(2, "context must not be code")) : r.get_method_frame()->caller();
1.37 moko 326: Value *value=context ? context->get_element(name) : 0;
1.35 moko 327:
328: if(value) {
329: if(type == "code" || type == "method") {
330: Junction *junction=value->get_junction();
331: r.write_no_lang(VBool::get(junction && ((junction->code==0) ^ (type == "code"))) );
332: } else {
333: r.write_no_lang(VBool::get( value->is(type.cstr()) ));
334: }
335: } else
1.36 moko 336: r.write_no_lang(VBool::get(type == "void"));
1.35 moko 337: }
338:
1.19 moko 339: static void _copy(Request& r, MethodParams& params) {
340: HashStringValue* src=params.as_no_junction(0, "source must not be code").get_hash();
341:
1.44 moko 342: if(src==NULL)
1.19 moko 343: throw Exception(PARSER_RUNTIME, 0, "source must have hash representation");
344:
345: Value& dst=params.as_no_junction(1, "destination must not be code");
346:
347: for(HashStringValue::Iterator i(*src); i; i.next())
1.20 moko 348: r.put_element(dst, *new String(i.key(), String::L_TAINTED), i.value());
1.19 moko 349: }
350:
1.25 moko 351: static void _uid(Request& r, MethodParams& params) {
352: Value& obj=params.as_no_junction(0, "object must not be code");
353:
354: char local_buf[MAX_NUMBER];
355: int size=snprintf(local_buf, sizeof(local_buf), "%p", &obj);
356:
1.33 moko 357: r.write_pass_lang(*new String(String::C(pa_strdup(local_buf, (size_t)size), size)));
1.25 moko 358: }
359:
1.27 moko 360: static void _delete(Request&, MethodParams& params) {
1.26 misha 361: const String& key=params.as_string(1, "field name must be string");
362: if(HashStringValue* fields=params[0].get_fields()){
363: fields->remove(key);
364: }
365: }
366:
367:
1.1 misha 368: // constructor
369: MReflection::MReflection(): Methoded("reflection") {
1.2 misha 370: // ^reflection:create[class_name;constructor_name[;param1[;param2[;...]]]]
371: add_native_method("create", Method::CT_STATIC, _create, 2, 102);
1.1 misha 372:
1.3 misha 373: // ^reflection:classes[]
374: add_native_method("classes", Method::CT_STATIC, _classes, 0, 0);
375:
1.1 misha 376: // ^reflection:class[object]
377: add_native_method("class", Method::CT_STATIC, _class, 1, 1);
378:
379: // ^reflection:class_name[object]
380: add_native_method("class_name", Method::CT_STATIC, _class_name, 1, 1);
381:
1.34 moko 382: // ^reflection:class_by_name[class_name]
383: add_native_method("class_by_name", Method::CT_STATIC, _class_by_name, 1, 1);
384:
1.2 misha 385: // ^reflection:base_class[object]
386: add_native_method("base", Method::CT_STATIC, _base, 1, 1);
387:
388: // ^reflection:base_class_name[object]
389: add_native_method("base_name", Method::CT_STATIC, _base_name, 1, 1);
390:
1.30 misha 391: // ^reflection:def[class|...;name]
392: add_native_method("def", Method::CT_STATIC, _def, 2, 2);
393:
1.2 misha 394: // ^reflection:methods[class_name]
1.1 misha 395: add_native_method("methods", Method::CT_STATIC, _methods, 1, 1);
1.2 misha 396:
1.28 misha 397: // ^reflection:method[object or class;method_name]
398: add_native_method("method", Method::CT_STATIC, _method, 2, 2);
399:
400: // ^reflection:method_info[class_name;method_name]
401: add_native_method("method_info", Method::CT_STATIC, _method_info, 2, 2);
402:
1.13 misha 403: // ^reflection:fields[object or class]
404: add_native_method("fields", Method::CT_STATIC, _fields, 1, 1);
405:
1.44 moko 406: // ^reflection:fields_reference[object]
407: add_native_method("fields_reference", Method::CT_STATIC, _fields_reference, 1, 1);
408:
1.28 misha 409: // ^reflection:field[object or class;field_name]
410: add_native_method("field", Method::CT_STATIC, _field, 2, 2);
1.9 misha 411:
412: // ^reflection:dynamical[[object or class, caller if absent]]
413: add_native_method("dynamical", Method::CT_STATIC, _dynamical, 0, 1);
1.19 moko 414:
1.39 moko 415: // ^reflection:is[element_name;class_name|code|method[;context]]
1.35 moko 416: add_native_method("is", Method::CT_STATIC, _is, 2, 3);
417:
1.19 moko 418: // ^reflection:copy[src;dst]
419: add_native_method("copy", Method::CT_STATIC, _copy, 2, 2);
1.25 moko 420:
421: // ^reflection:uid[object or class]
422: add_native_method("uid", Method::CT_STATIC, _uid, 1, 1);
1.26 misha 423:
424: // ^reflection:delete[object or class;field_name]
425: add_native_method("delete", Method::CT_STATIC, _delete, 2, 2);
1.1 misha 426: }
E-mail:
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to reflection.C CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / classes