Annotation of parser3/src/types/pa_value.h, revision 1.152
1.22 paf 1: /** @file
1.110 paf 2: Parser: Value, Method, Junction .
1.24 paf 3:
1.144 moko 4: Copyright (c) 2001-2012 Art. Lebedev Studio (http://www.artlebedev.com)
1.79 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 6: */
7:
8: #ifndef PA_VALUE_H
9: #define PA_VALUE_H
1.87 paf 10:
1.152 ! moko 11: #define IDENT_PA_VALUE_H "$Id: pa_value.h,v 1.151 2013/10/04 21:21:55 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"
1.1 paf 17:
1.99 paf 18: // forwards
19:
1.9 paf 20: class VStateless_class;
1.1 paf 21: class WContext;
1.133 misha 22: class Request;
23: class Request_charsets;
1.17 paf 24: class Junction;
1.123 paf 25: class VJunction;
1.17 paf 26: class Method;
1.131 misha 27: class Value;
1.64 parser 28: class MethodParams;
1.93 paf 29: class VObject;
1.99 paf 30: class VMethodFrame;
1.110 paf 31: class VFile;
32: class Table;
1.143 misha 33: struct XDocOutputOptions;
1.133 misha 34: typedef Array<Value*> ArrayValue;
1.1 paf 35:
1.139 misha 36: struct Json_options {
37: Request* r;
1.149 moko 38: String::Body key;
1.139 misha 39: HashStringValue* methods;
1.149 moko 40: Value* default_method;
1.139 misha 41: Value* params;
42: bool skip_unknown;
1.150 moko 43: uint json_string_recoursion;
1.141 moko 44: const char* indent;
1.143 misha 45: XDocOutputOptions* xdoc_options;
1.139 misha 46: enum Date { D_SQL, D_GMT, D_TIMESTAMP } date;
1.142 moko 47: enum Table { T_ARRAY, T_OBJECT, T_COMPACT } table;
1.139 misha 48: enum File { F_BODYLESS, F_BASE64, F_TEXT } file;
49:
1.149 moko 50: Json_options(Request* arequest):
1.139 misha 51: r(arequest),
52: methods(NULL),
1.149 moko 53: default_method(NULL),
1.139 misha 54: params(NULL),
55: skip_unknown(false),
1.143 misha 56: xdoc_options(NULL),
1.150 moko 57: json_string_recoursion(0),
1.140 moko 58: indent(NULL),
1.139 misha 59: date(D_SQL),
60: table(T_OBJECT),
61: file(F_BODYLESS)
62: {}
63:
64: bool set_date_format(const String &value){
65: if(value == "gmt-string") date = D_GMT;
66: else if (value == "sql-string") date = D_SQL;
67: else if (value == "unix-timestamp") date = D_TIMESTAMP;
68: else return false;
69: return true;
70: }
71:
72: bool set_table_format(const String &value){
73: if(value == "array") table = T_ARRAY;
74: else if (value == "object") table = T_OBJECT;
1.142 moko 75: else if (value == "compact") table = T_COMPACT;
1.139 misha 76: else return false;
77: return true;
78: }
79:
80: bool set_file_format(const String &value){
81: if(value == "base64") file = F_BASE64;
82: else if (value == "text") file = F_TEXT;
1.148 misha 83: else if (value == "stat") file = F_BODYLESS;
1.139 misha 84: else return false;
85: return true;
86: }
1.149 moko 87:
88: const String* hash_json_string(HashStringValue &hash);
1.139 misha 89: };
90:
1.31 paf 91: /// grandfather of all @a values in @b Parser
1.110 paf 92: class Value: public PA_Object {
1.1 paf 93: public: // Value
94:
1.106 paf 95: /// value type, used for error reporting and 'is' expression operator
1.110 paf 96: virtual const char* type() const =0;
1.89 paf 97:
98: /**
1.95 paf 99: all except VObject/VClass: this if @atype eq type()
100: VObject/VClass: can locate parent class by it's type
1.89 paf 101: */
1.134 misha 102: virtual Value* as(const char* atype) {
1.96 paf 103: return atype && strcmp(type(), atype)==0?this:0;
1.89 paf 104: }
1.97 paf 105: /// type checking helper, uses Value::as
1.134 misha 106: bool is(const char* atype) { return as(atype)!=0; }
1.59 parser 107:
1.106 paf 108: /// is this value defined?
1.38 paf 109: virtual bool is_defined() const { return true; }
1.59 parser 110:
1.106 paf 111: /// is this value string?
1.38 paf 112: virtual bool is_string() const { return false; }
1.124 paf 113:
114: /// is this value void?
115: virtual bool is_void() const { return false; }
116:
1.128 misha 117: /// is this value bool?
118: virtual bool is_bool() const { return false; }
119:
1.124 paf 120: /// is this value number?
1.126 paf 121: virtual bool is_evaluated_expr() const { return false; }
1.124 paf 122:
1.106 paf 123: /// what's the meaning of this value in context of expression?
1.147 moko 124: virtual Value& as_expr_result() {
1.112 paf 125: return *bark("is '%s', can not be used in expression");
1.34 paf 126: }
1.59 parser 127:
1.110 paf 128:
129:
130: /** extract HashStringValue if any
131: WARNING: FOR LOCAL USE ONLY, THIS POINTER IS NOT TO PASS TO ANYBODY!
132: */
133: virtual HashStringValue* get_hash() { return 0; }
1.59 parser 134:
1.106 paf 135: /// extract const String
1.110 paf 136: virtual const String* get_string() { return 0; }
1.136 misha 137:
1.139 misha 138: /// extract json-string
1.149 moko 139: virtual const String* get_json_string(Json_options& options);
1.139 misha 140:
1.136 misha 141: virtual HashStringValue* get_fields() { return 0; }
1.59 parser 142:
1.106 paf 143: /// extract double
1.110 paf 144: virtual double as_double() const { bark("is '%s', it does not have numerical (double) value"); return 0; }
1.59 parser 145:
1.106 paf 146: /// extract integer
1.110 paf 147: virtual int as_int () const { bark("is '%s', it does not have numerical (int) value"); return 0; }
1.59 parser 148:
1.106 paf 149: /// extract bool
1.110 paf 150: virtual bool as_bool() const { bark("is '%s', it does not have logical value"); return 0; }
1.59 parser 151:
1.106 paf 152: /// extract file
1.132 misha 153: virtual VFile* as_vfile(String::Language lang, const Request_charsets* charsets=0);
1.59 parser 154:
1.106 paf 155: /// extract Junction
1.110 paf 156: virtual Junction* get_junction();
1.59 parser 157:
1.120 paf 158: /// @return Value element; can return Junction for methods; Code-Junction for code; Getter-Junction for property
1.134 misha 159: virtual Value* get_element(const String& /*aname*/);
1.92 paf 160:
1.122 paf 161: /// indicator value meaning that put_element overwritten something
1.123 paf 162: #define PUT_ELEMENT_REPLACED_ELEMENT reinterpret_cast<const VJunction*>(1)
1.134 misha 163:
1.106 paf 164: /// store Value element under @a name
1.122 paf 165: /// @returns putter method junction, or it can just report[PUT_ELEMENT_REPLACED_ELEMENT]
166: /// that it replaced something in base fields
1.151 moko 167: virtual const VJunction* put_element(const String& aname, Value* /*avalue*/) {
1.65 parser 168: // to prevent modification of system classes,
169: // created at system startup, and not having exception
170: // handler installed, we neet to bark using request.pool
1.112 paf 171: bark("element can not be stored to %s", &aname);
1.120 paf 172: return 0;
1.65 parser 173: }
1.137 moko 174:
175: /// VObject default getter & setter support
176: virtual void enable_default_getter(){ }
177: virtual void enable_default_setter(){ }
178: virtual void disable_default_getter(){ }
179: virtual void disable_default_setter(){ }
180: virtual bool is_enabled_default_getter(){ return true; }
1.152 ! moko 181: virtual bool is_enabled_default_setter(){ return true; }
1.59 parser 182:
1.106 paf 183: /// extract VStateless_class
1.135 misha 184: virtual VStateless_class* get_class()=0;
1.107 paf 185:
1.135 misha 186: /// extract base class, if any
187: virtual VStateless_class* base() { return 0; }
1.32 paf 188:
1.106 paf 189: /// extract VTable
1.110 paf 190: virtual Table* get_table() { return 0; }
1.1 paf 191:
192: public: // usage
193:
1.26 paf 194: /// @return sure String. if it doesn't have string value barks
1.1 paf 195: const String& as_string() {
1.110 paf 196: const String* result=get_string();
1.1 paf 197: if(!result)
1.110 paf 198: bark("is '%s', it has no string representation");
1.6 paf 199:
1.1 paf 200: return *result;
201: }
202:
1.22 paf 203: /// throws exception specifying bark-reason and name() type() of problematic value
1.112 paf 204: Value* bark(const char *reason, const String *problem_source=0) const {
1.127 paf 205: //if(this) // removing warnings on unreachable code
1.129 misha 206: throw Exception(PARSER_RUNTIME,
1.117 paf 207: problem_source,
208: reason, type());
209:
1.127 paf 210: //return 0;
1.1 paf 211: }
212:
1.17 paf 213: };
1.110 paf 214:
1.48 paf 215:
216: /**
1.110 paf 217: $content-type[text/html] ->
218: content-type: text/html
1.130 misha 219: $content-type[$.value[text/html] $.charset[windows-1251]] ->
1.110 paf 220: content-type: text/html; charset=windows-1251
1.48 paf 221: */
1.110 paf 222: const String& attributed_meaning_to_string(Value& meaning,
223: String::Language lang,
1.128 misha 224: bool forced=false,
225: bool allow_bool=false);
1.110 paf 226:
227: // defines
228:
229: ///@{common field names
230: #define CHARSET_NAME "charset"
231: #define VALUE_NAME "value"
1.114 paf 232: #define EXPIRES_NAME "expires"
1.110 paf 233: #define CONTENT_TYPE_NAME "content-type"
1.119 paf 234: #define NAME_NAME "name"
1.110 paf 235: //@}
236:
237: ///@{common field names
238: extern const String value_name;
1.114 paf 239: extern const String expires_name;
1.110 paf 240: extern const String content_type_name;
241: extern const String name_name;
242: ///@}
1.1 paf 243:
244: #endif
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