Annotation of parser3/src/types/pa_value.h, revision 1.149
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:
1.149 ! moko 11: #define IDENT_PA_VALUE_H "$Id: pa_value.h,v 1.148 2012-05-27 22:34:15 misha 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;
1.141 moko 43: const char* indent;
1.143 misha 44: XDocOutputOptions* xdoc_options;
1.139 misha 45: enum Date { D_SQL, D_GMT, D_TIMESTAMP } date;
1.142 moko 46: enum Table { T_ARRAY, T_OBJECT, T_COMPACT } table;
1.139 misha 47: enum File { F_BODYLESS, F_BASE64, F_TEXT } file;
48:
1.149 ! moko 49: Json_options(Request* arequest):
1.139 misha 50: r(arequest),
51: methods(NULL),
1.149 ! moko 52: default_method(NULL),
1.139 misha 53: params(NULL),
54: skip_unknown(false),
1.143 misha 55: xdoc_options(NULL),
1.140 moko 56: indent(NULL),
1.139 misha 57: date(D_SQL),
58: table(T_OBJECT),
59: file(F_BODYLESS)
60: {}
61:
62: bool set_date_format(const String &value){
63: if(value == "gmt-string") date = D_GMT;
64: else if (value == "sql-string") date = D_SQL;
65: else if (value == "unix-timestamp") date = D_TIMESTAMP;
66: else return false;
67: return true;
68: }
69:
70: bool set_table_format(const String &value){
71: if(value == "array") table = T_ARRAY;
72: else if (value == "object") table = T_OBJECT;
1.142 moko 73: else if (value == "compact") table = T_COMPACT;
1.139 misha 74: else return false;
75: return true;
76: }
77:
78: bool set_file_format(const String &value){
79: if(value == "base64") file = F_BASE64;
80: else if (value == "text") file = F_TEXT;
1.148 misha 81: else if (value == "stat") file = F_BODYLESS;
1.139 misha 82: else return false;
83: return true;
84: }
1.149 ! moko 85:
! 86: const String* hash_json_string(HashStringValue &hash);
1.139 misha 87: };
88:
1.31 paf 89: /// grandfather of all @a values in @b Parser
1.110 paf 90: class Value: public PA_Object {
1.1 paf 91: public: // Value
92:
1.106 paf 93: /// value type, used for error reporting and 'is' expression operator
1.110 paf 94: virtual const char* type() const =0;
1.89 paf 95:
96: /**
1.95 paf 97: all except VObject/VClass: this if @atype eq type()
98: VObject/VClass: can locate parent class by it's type
1.89 paf 99: */
1.134 misha 100: virtual Value* as(const char* atype) {
1.96 paf 101: return atype && strcmp(type(), atype)==0?this:0;
1.89 paf 102: }
1.97 paf 103: /// type checking helper, uses Value::as
1.134 misha 104: bool is(const char* atype) { return as(atype)!=0; }
1.59 parser 105:
1.106 paf 106: /// is this value defined?
1.38 paf 107: virtual bool is_defined() const { return true; }
1.59 parser 108:
1.106 paf 109: /// is this value string?
1.38 paf 110: virtual bool is_string() const { return false; }
1.124 paf 111:
112: /// is this value void?
113: virtual bool is_void() const { return false; }
114:
1.128 misha 115: /// is this value bool?
116: virtual bool is_bool() const { return false; }
117:
1.124 paf 118: /// is this value number?
1.126 paf 119: virtual bool is_evaluated_expr() const { return false; }
1.124 paf 120:
1.106 paf 121: /// what's the meaning of this value in context of expression?
1.147 moko 122: virtual Value& as_expr_result() {
1.112 paf 123: return *bark("is '%s', can not be used in expression");
1.34 paf 124: }
1.59 parser 125:
1.110 paf 126:
127:
128: /** extract HashStringValue if any
129: WARNING: FOR LOCAL USE ONLY, THIS POINTER IS NOT TO PASS TO ANYBODY!
130: */
131: virtual HashStringValue* get_hash() { return 0; }
1.59 parser 132:
1.106 paf 133: /// extract const String
1.110 paf 134: virtual const String* get_string() { return 0; }
1.136 misha 135:
1.139 misha 136: /// extract json-string
1.149 ! moko 137: virtual const String* get_json_string(Json_options& options);
1.139 misha 138:
1.136 misha 139: virtual HashStringValue* get_fields() { return 0; }
1.59 parser 140:
1.106 paf 141: /// extract double
1.110 paf 142: virtual double as_double() const { bark("is '%s', it does not have numerical (double) value"); return 0; }
1.59 parser 143:
1.106 paf 144: /// extract integer
1.110 paf 145: virtual int as_int () const { bark("is '%s', it does not have numerical (int) value"); return 0; }
1.59 parser 146:
1.106 paf 147: /// extract bool
1.110 paf 148: virtual bool as_bool() const { bark("is '%s', it does not have logical value"); return 0; }
1.59 parser 149:
1.106 paf 150: /// extract file
1.132 misha 151: virtual VFile* as_vfile(String::Language lang, const Request_charsets* charsets=0);
1.59 parser 152:
1.106 paf 153: /// extract Junction
1.110 paf 154: virtual Junction* get_junction();
1.59 parser 155:
1.120 paf 156: /// @return Value element; can return Junction for methods; Code-Junction for code; Getter-Junction for property
1.134 misha 157: virtual Value* get_element(const String& /*aname*/);
1.92 paf 158:
1.122 paf 159: /// indicator value meaning that put_element overwritten something
1.123 paf 160: #define PUT_ELEMENT_REPLACED_ELEMENT reinterpret_cast<const VJunction*>(1)
1.134 misha 161:
1.106 paf 162: /// store Value element under @a name
1.122 paf 163: /// @returns putter method junction, or it can just report[PUT_ELEMENT_REPLACED_ELEMENT]
164: /// that it replaced something in base fields
1.134 misha 165: virtual const VJunction* put_element(const String& aname, Value* /*avalue*/, bool /*areplace*/) {
1.65 parser 166: // to prevent modification of system classes,
167: // created at system startup, and not having exception
168: // handler installed, we neet to bark using request.pool
1.112 paf 169: bark("element can not be stored to %s", &aname);
1.120 paf 170: return 0;
1.65 parser 171: }
1.137 moko 172:
173: /// VObject default getter & setter support
174: virtual void enable_default_getter(){ }
175: virtual void enable_default_setter(){ }
176: virtual void disable_default_getter(){ }
177: virtual void disable_default_setter(){ }
178: virtual bool is_enabled_default_getter(){ return true; }
1.59 parser 179:
1.106 paf 180: /// extract VStateless_class
1.135 misha 181: virtual VStateless_class* get_class()=0;
1.107 paf 182:
1.135 misha 183: /// extract base class, if any
184: virtual VStateless_class* base() { return 0; }
1.32 paf 185:
1.106 paf 186: /// extract VTable
1.110 paf 187: virtual Table* get_table() { return 0; }
1.1 paf 188:
189: public: // usage
190:
1.26 paf 191: /// @return sure String. if it doesn't have string value barks
1.1 paf 192: const String& as_string() {
1.110 paf 193: const String* result=get_string();
1.1 paf 194: if(!result)
1.110 paf 195: bark("is '%s', it has no string representation");
1.6 paf 196:
1.1 paf 197: return *result;
198: }
199:
1.22 paf 200: /// throws exception specifying bark-reason and name() type() of problematic value
1.112 paf 201: Value* bark(const char *reason, const String *problem_source=0) const {
1.127 paf 202: //if(this) // removing warnings on unreachable code
1.129 misha 203: throw Exception(PARSER_RUNTIME,
1.117 paf 204: problem_source,
205: reason, type());
206:
1.127 paf 207: //return 0;
1.1 paf 208: }
209:
1.17 paf 210: };
1.110 paf 211:
1.48 paf 212:
213: /**
1.110 paf 214: $content-type[text/html] ->
215: content-type: text/html
1.130 misha 216: $content-type[$.value[text/html] $.charset[windows-1251]] ->
1.110 paf 217: content-type: text/html; charset=windows-1251
1.48 paf 218: */
1.110 paf 219: const String& attributed_meaning_to_string(Value& meaning,
220: String::Language lang,
1.128 misha 221: bool forced=false,
222: bool allow_bool=false);
1.110 paf 223:
224: // defines
225:
226: ///@{common field names
227: #define CHARSET_NAME "charset"
228: #define VALUE_NAME "value"
1.114 paf 229: #define EXPIRES_NAME "expires"
1.110 paf 230: #define CONTENT_TYPE_NAME "content-type"
1.119 paf 231: #define NAME_NAME "name"
1.110 paf 232: //@}
233:
234: ///@{common field names
235: extern const String value_name;
1.114 paf 236: extern const String expires_name;
1.110 paf 237: extern const String content_type_name;
238: extern const String name_name;
239: ///@}
1.1 paf 240:
241: #endif
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