Annotation of parser3/src/types/pa_value.h, revision 1.176
1.22 paf 1: /** @file
1.110 paf 2: Parser: Value, Method, Junction .
1.24 paf 3:
1.176 ! moko 4: Copyright (c) 2001-2024 Art. Lebedev Studio (http://www.artlebedev.com)
1.169 moko 5: Authors: Konstantin Morshnev <moko@design.ru>, Alexandr Petrosian <paf@design.ru>
1.1 paf 6: */
7:
8: #ifndef PA_VALUE_H
9: #define PA_VALUE_H
1.87 paf 10:
1.176 ! moko 11: #define IDENT_PA_VALUE_H "$Id: pa_value.h,v 1.175 2024/10/02 21:24:41 moko Exp $"
1.1 paf 12:
1.133 misha 13: #include "pa_common.h"
1.1 paf 14: #include "pa_array.h"
15: #include "pa_exception.h"
1.120 paf 16: #include "pa_property.h"
1.157 moko 17: #include "pa_opcode.h"
1.1 paf 18:
1.99 paf 19: // forwards
20:
1.9 paf 21: class VStateless_class;
1.1 paf 22: class WContext;
1.133 misha 23: class Request;
24: class Request_charsets;
1.17 paf 25: class Junction;
1.123 paf 26: class VJunction;
1.17 paf 27: class Method;
1.131 misha 28: class Value;
1.64 parser 29: class MethodParams;
1.93 paf 30: class VObject;
1.99 paf 31: class VMethodFrame;
1.110 paf 32: class VFile;
33: class Table;
1.143 misha 34: struct XDocOutputOptions;
1.172 moko 35:
36: template <typename T>class SparseArray;
37: typedef SparseArray<Value*> ArrayValue;
1.1 paf 38:
1.165 moko 39: struct Json_options : public PA_Allocated {
1.139 misha 40: Request* r;
1.149 moko 41: String::Body key;
1.139 misha 42: HashStringValue* methods;
1.149 moko 43: Value* default_method;
1.139 misha 44: Value* params;
45: bool skip_unknown;
1.162 moko 46: bool one_line;
1.175 moko 47: uint json_string_recursion;
1.141 moko 48: const char* indent;
1.143 misha 49: XDocOutputOptions* xdoc_options;
1.156 moko 50: enum Date { D_SQL, D_GMT, D_ISO, D_TIMESTAMP } date;
1.142 moko 51: enum Table { T_ARRAY, T_OBJECT, T_COMPACT } table;
1.170 moko 52: enum Array { A_ARRAY, A_OBJECT, A_COMPACT } array;
1.139 misha 53: enum File { F_BODYLESS, F_BASE64, F_TEXT } file;
1.153 misha 54: enum Void { V_NULL, V_STRING } fvoid;
1.139 misha 55:
1.149 moko 56: Json_options(Request* arequest):
1.139 misha 57: r(arequest),
58: methods(NULL),
1.149 moko 59: default_method(NULL),
1.139 misha 60: params(NULL),
61: skip_unknown(false),
1.162 moko 62: one_line(false),
1.175 moko 63: json_string_recursion(0),
1.140 moko 64: indent(NULL),
1.161 moko 65: xdoc_options(NULL),
1.139 misha 66: date(D_SQL),
67: table(T_OBJECT),
1.170 moko 68: array(A_COMPACT),
1.153 misha 69: file(F_BODYLESS),
70: fvoid(V_NULL)
1.139 misha 71: {}
72:
73: bool set_date_format(const String &value){
1.156 moko 74: if(value == "sql-string") date = D_SQL;
75: else if (value == "gmt-string") date = D_GMT;
76: else if (value == "iso-string") date = D_ISO;
1.139 misha 77: else if (value == "unix-timestamp") date = D_TIMESTAMP;
78: else return false;
79: return true;
80: }
81:
82: bool set_table_format(const String &value){
83: if(value == "array") table = T_ARRAY;
84: else if (value == "object") table = T_OBJECT;
1.142 moko 85: else if (value == "compact") table = T_COMPACT;
1.139 misha 86: else return false;
87: return true;
88: }
89:
1.170 moko 90: bool set_array_format(const String &value){
91: if(value == "array") array = A_ARRAY;
92: else if (value == "object") array = A_OBJECT;
93: else if (value == "compact") array = A_COMPACT;
94: else return false;
95: return true;
96: }
97:
1.139 misha 98: bool set_file_format(const String &value){
99: if(value == "base64") file = F_BASE64;
100: else if (value == "text") file = F_TEXT;
1.148 misha 101: else if (value == "stat") file = F_BODYLESS;
1.139 misha 102: else return false;
103: return true;
104: }
1.149 moko 105:
1.153 misha 106: bool set_void_format(const String &value){
107: if(value == "null") fvoid = V_NULL;
108: else if(value == "string") fvoid = V_STRING;
109: else return false;
110: return true;
111: }
112:
1.155 moko 113: const String* hash_json_string(HashStringValue *hash);
1.170 moko 114: const String* array_json_string(ArrayValue *array);
115: const String* array_compact_json_string(ArrayValue *array);
1.139 misha 116: };
117:
1.31 paf 118: /// grandfather of all @a values in @b Parser
1.110 paf 119: class Value: public PA_Object {
1.1 paf 120: public: // Value
121:
1.106 paf 122: /// value type, used for error reporting and 'is' expression operator
1.110 paf 123: virtual const char* type() const =0;
1.89 paf 124:
125: /**
1.171 moko 126: all except VObject/VClass: true if @atype eq type()
1.95 paf 127: VObject/VClass: can locate parent class by it's type
1.89 paf 128: */
1.171 moko 129: virtual bool is(const char* atype) { return atype && strcmp(type(), atype)==0; }
1.164 moko 130:
1.106 paf 131: /// is this value defined?
1.38 paf 132: virtual bool is_defined() const { return true; }
1.164 moko 133:
1.106 paf 134: /// is this value string?
1.38 paf 135: virtual bool is_string() const { return false; }
1.124 paf 136:
137: /// is this value void?
138: virtual bool is_void() const { return false; }
139:
1.128 misha 140: /// is this value bool?
141: virtual bool is_bool() const { return false; }
142:
1.124 paf 143: /// is this value number?
1.126 paf 144: virtual bool is_evaluated_expr() const { return false; }
1.124 paf 145:
1.106 paf 146: /// what's the meaning of this value in context of expression?
1.147 moko 147: virtual Value& as_expr_result() {
1.173 moko 148: return *bark("is '%s', cannot be used in expression");
1.34 paf 149: }
1.110 paf 150:
151: /** extract HashStringValue if any
152: WARNING: FOR LOCAL USE ONLY, THIS POINTER IS NOT TO PASS TO ANYBODY!
153: */
154: virtual HashStringValue* get_hash() { return 0; }
1.164 moko 155:
1.106 paf 156: /// extract const String
1.110 paf 157: virtual const String* get_string() { return 0; }
1.136 misha 158:
1.139 misha 159: /// extract json-string
1.149 moko 160: virtual const String* get_json_string(Json_options& options);
1.154 misha 161: const String* default_method_2_json_string(Value& default_method, Json_options& options);
1.139 misha 162:
1.164 moko 163: /// for reflection
1.136 misha 164: virtual HashStringValue* get_fields() { return 0; }
1.159 moko 165: virtual HashStringValue* get_fields_reference() { return 0; }
1.164 moko 166:
1.106 paf 167: /// extract double
1.110 paf 168: virtual double as_double() const { bark("is '%s', it does not have numerical (double) value"); return 0; }
1.164 moko 169:
1.106 paf 170: /// extract integer
1.110 paf 171: virtual int as_int () const { bark("is '%s', it does not have numerical (int) value"); return 0; }
1.59 parser 172:
1.106 paf 173: /// extract bool
1.110 paf 174: virtual bool as_bool() const { bark("is '%s', it does not have logical value"); return 0; }
1.164 moko 175:
1.106 paf 176: /// extract file
1.168 moko 177: virtual VFile* as_vfile();
178: virtual VFile* as_vfile(String::Language /*lang*/, const Request_charsets* /*charsets*/) { return as_vfile(); }
1.164 moko 179:
1.106 paf 180: /// extract Junction
1.110 paf 181: virtual Junction* get_junction();
1.164 moko 182:
1.120 paf 183: /// @return Value element; can return Junction for methods; Code-Junction for code; Getter-Junction for property
1.134 misha 184: virtual Value* get_element(const String& /*aname*/);
1.92 paf 185:
1.157 moko 186: #ifdef FEATURE_GET_ELEMENT4CALL
187: /// same as get_element, but methods have higher priority in table and hash
188: virtual Value* get_element4call(const String& aname){
189: return get_element(aname);
190: }
191: #endif
192:
1.106 paf 193: /// store Value element under @a name
1.166 moko 194: /// @returns putter method junction, or 0
1.151 moko 195: virtual const VJunction* put_element(const String& aname, Value* /*avalue*/) {
1.65 parser 196: // to prevent modification of system classes,
197: // created at system startup, and not having exception
198: // handler installed, we neet to bark using request.pool
1.174 moko 199: bark("element cannot be stored into %s", &aname);
1.120 paf 200: return 0;
1.65 parser 201: }
1.137 moko 202:
203: /// VObject default getter & setter support
204: virtual void enable_default_getter(){ }
205: virtual void enable_default_setter(){ }
206: virtual void disable_default_getter(){ }
207: virtual void disable_default_setter(){ }
208: virtual bool is_enabled_default_getter(){ return true; }
1.152 moko 209: virtual bool is_enabled_default_setter(){ return true; }
1.164 moko 210:
1.106 paf 211: /// extract VStateless_class
1.135 misha 212: virtual VStateless_class* get_class()=0;
1.107 paf 213:
1.135 misha 214: /// extract base class, if any
215: virtual VStateless_class* base() { return 0; }
1.32 paf 216:
1.106 paf 217: /// extract VTable
1.110 paf 218: virtual Table* get_table() { return 0; }
1.1 paf 219:
1.164 moko 220: /// warning war, no overhead as destructors are called manually only when required
221: virtual ~Value() {}
222:
1.1 paf 223: public: // usage
224:
1.160 moko 225: /// @return sure String or barks if it doesn't have string value
1.1 paf 226: const String& as_string() {
1.160 moko 227: const String* result=get_string();
1.1 paf 228: if(!result)
1.110 paf 229: bark("is '%s', it has no string representation");
1.6 paf 230:
1.1 paf 231: return *result;
232: }
233:
1.160 moko 234: /// @return Hash or barks if it is not hash compatible
235: HashStringValue* as_hash(const char* name=0);
236:
1.22 paf 237: /// throws exception specifying bark-reason and name() type() of problematic value
1.112 paf 238: Value* bark(const char *reason, const String *problem_source=0) const {
1.166 moko 239: throw Exception(PARSER_RUNTIME, problem_source, reason, type());
1.1 paf 240: }
241:
1.17 paf 242: };
1.48 paf 243:
244: /**
1.164 moko 245: $content-type[text/html] ->
1.110 paf 246: content-type: text/html
1.164 moko 247: $content-type[$.value[text/html] $.charset[windows-1251]] ->
1.110 paf 248: content-type: text/html; charset=windows-1251
1.48 paf 249: */
1.164 moko 250: const String& attributed_meaning_to_string(Value& meaning, String::Language lang, bool forced=false, bool allow_bool=false);
1.110 paf 251:
252: // defines
253:
254: ///@{common field names
255: #define CHARSET_NAME "charset"
256: #define VALUE_NAME "value"
1.114 paf 257: #define EXPIRES_NAME "expires"
1.110 paf 258: #define CONTENT_TYPE_NAME "content-type"
1.119 paf 259: #define NAME_NAME "name"
1.110 paf 260: //@}
261:
262: ///@{common field names
263: extern const String value_name;
1.114 paf 264: extern const String expires_name;
1.110 paf 265: extern const String content_type_name;
266: extern const String name_name;
267: ///@}
1.1 paf 268:
269: #endif
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