Annotation of parser3/src/types/pa_value.h, revision 1.145
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:
1.145 ! moko 11: #define IDENT_PA_VALUE_H "$Id: pa_value.h,v 1.144 2012-03-16 09:24:16 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;
38: HashStringValue* methods;
39: Value* params;
40: bool skip_unknown;
1.141 moko 41: const char* indent;
1.143 misha 42: XDocOutputOptions* xdoc_options;
1.139 misha 43: enum Date { D_SQL, D_GMT, D_TIMESTAMP } date;
1.142 moko 44: enum Table { T_ARRAY, T_OBJECT, T_COMPACT } table;
1.139 misha 45: enum File { F_BODYLESS, F_BASE64, F_TEXT } file;
46:
47: Json_options(Request* arequest):
48: r(arequest),
49: methods(NULL),
50: params(NULL),
51: skip_unknown(false),
1.143 misha 52: xdoc_options(NULL),
1.140 moko 53: indent(NULL),
1.139 misha 54: date(D_SQL),
55: table(T_OBJECT),
56: file(F_BODYLESS)
57: {}
58:
59: bool set_date_format(const String &value){
60: if(value == "gmt-string") date = D_GMT;
61: else if (value == "sql-string") date = D_SQL;
62: else if (value == "unix-timestamp") date = D_TIMESTAMP;
63: else return false;
64: return true;
65: }
66:
67: bool set_table_format(const String &value){
68: if(value == "array") table = T_ARRAY;
69: else if (value == "object") table = T_OBJECT;
1.142 moko 70: else if (value == "compact") table = T_COMPACT;
1.139 misha 71: else return false;
72: return true;
73: }
74:
75: bool set_file_format(const String &value){
76: if(value == "base64") file = F_BASE64;
77: else if (value == "text") file = F_TEXT;
78: else return false;
79: return true;
80: }
81: };
82:
1.145 ! moko 83: #define SERIALIZED_STRING 256
! 84: #define SERIALIZED_FILE 512
! 85:
! 86: struct Serialization_data{
! 87: unsigned int flags;
! 88: const char *ptr;
! 89: size_t length;
! 90:
! 91: Serialization_data() : flags(0), ptr(0), length(0){}
! 92: Serialization_data(unsigned int aflags) : flags(aflags), ptr(0), length(0){}
! 93: Serialization_data(unsigned int aflags, const char *aptr, size_t alength) : flags(aflags), ptr(aptr), length(alength){}
! 94: };
! 95:
1.31 paf 96: /// grandfather of all @a values in @b Parser
1.110 paf 97: class Value: public PA_Object {
1.1 paf 98: public: // Value
99:
1.106 paf 100: /// value type, used for error reporting and 'is' expression operator
1.110 paf 101: virtual const char* type() const =0;
1.89 paf 102:
103: /**
1.95 paf 104: all except VObject/VClass: this if @atype eq type()
105: VObject/VClass: can locate parent class by it's type
1.89 paf 106: */
1.134 misha 107: virtual Value* as(const char* atype) {
1.96 paf 108: return atype && strcmp(type(), atype)==0?this:0;
1.89 paf 109: }
1.97 paf 110: /// type checking helper, uses Value::as
1.134 misha 111: bool is(const char* atype) { return as(atype)!=0; }
1.59 parser 112:
1.106 paf 113: /// is this value defined?
1.38 paf 114: virtual bool is_defined() const { return true; }
1.59 parser 115:
1.106 paf 116: /// is this value string?
1.38 paf 117: virtual bool is_string() const { return false; }
1.124 paf 118:
119: /// is this value void?
120: virtual bool is_void() const { return false; }
121:
1.128 misha 122: /// is this value bool?
123: virtual bool is_bool() const { return false; }
124:
1.124 paf 125: /// is this value number?
1.126 paf 126: virtual bool is_evaluated_expr() const { return false; }
1.124 paf 127:
1.106 paf 128: /// what's the meaning of this value in context of expression?
1.110 paf 129: virtual Value& as_expr_result(bool /*return_string_as_is*/=false) {
1.112 paf 130: return *bark("is '%s', can not be used in expression");
1.34 paf 131: }
1.59 parser 132:
1.110 paf 133:
134:
135: /** extract HashStringValue if any
136: WARNING: FOR LOCAL USE ONLY, THIS POINTER IS NOT TO PASS TO ANYBODY!
137: */
138: virtual HashStringValue* get_hash() { return 0; }
1.59 parser 139:
1.106 paf 140: /// extract const String
1.110 paf 141: virtual const String* get_string() { return 0; }
1.136 misha 142:
1.139 misha 143: /// extract json-string
144: virtual const String* get_json_string(Json_options* options=0);
145:
1.136 misha 146: virtual HashStringValue* get_fields() { return 0; }
1.59 parser 147:
1.106 paf 148: /// extract double
1.110 paf 149: virtual double as_double() const { bark("is '%s', it does not have numerical (double) value"); return 0; }
1.59 parser 150:
1.106 paf 151: /// extract integer
1.110 paf 152: virtual int as_int () const { bark("is '%s', it does not have numerical (int) value"); return 0; }
1.59 parser 153:
1.106 paf 154: /// extract bool
1.110 paf 155: virtual bool as_bool() const { bark("is '%s', it does not have logical value"); return 0; }
1.59 parser 156:
1.106 paf 157: /// extract file
1.132 misha 158: virtual VFile* as_vfile(String::Language lang, const Request_charsets* charsets=0);
1.59 parser 159:
1.106 paf 160: /// extract Junction
1.110 paf 161: virtual Junction* get_junction();
1.59 parser 162:
1.120 paf 163: /// @return Value element; can return Junction for methods; Code-Junction for code; Getter-Junction for property
1.134 misha 164: virtual Value* get_element(const String& /*aname*/);
1.92 paf 165:
1.122 paf 166: /// indicator value meaning that put_element overwritten something
1.123 paf 167: #define PUT_ELEMENT_REPLACED_ELEMENT reinterpret_cast<const VJunction*>(1)
1.134 misha 168:
1.106 paf 169: /// store Value element under @a name
1.122 paf 170: /// @returns putter method junction, or it can just report[PUT_ELEMENT_REPLACED_ELEMENT]
171: /// that it replaced something in base fields
1.134 misha 172: virtual const VJunction* put_element(const String& aname, Value* /*avalue*/, bool /*areplace*/) {
1.65 parser 173: // to prevent modification of system classes,
174: // created at system startup, and not having exception
175: // handler installed, we neet to bark using request.pool
1.112 paf 176: bark("element can not be stored to %s", &aname);
1.120 paf 177: return 0;
1.65 parser 178: }
1.137 moko 179:
180: /// VObject default getter & setter support
181: virtual void enable_default_getter(){ }
182: virtual void enable_default_setter(){ }
183: virtual void disable_default_getter(){ }
184: virtual void disable_default_setter(){ }
185: virtual bool is_enabled_default_getter(){ return true; }
1.59 parser 186:
1.106 paf 187: /// extract VStateless_class
1.135 misha 188: virtual VStateless_class* get_class()=0;
1.107 paf 189:
1.135 misha 190: /// extract base class, if any
191: virtual VStateless_class* base() { return 0; }
1.32 paf 192:
1.106 paf 193: /// extract VTable
1.110 paf 194: virtual Table* get_table() { return 0; }
1.1 paf 195:
1.145 ! moko 196: /// serialization support
! 197: virtual void serialize(Serialization_data &data) { bark("is '%s', it does not support serialization"); }
! 198:
1.1 paf 199: public: // usage
200:
1.26 paf 201: /// @return sure String. if it doesn't have string value barks
1.1 paf 202: const String& as_string() {
1.110 paf 203: const String* result=get_string();
1.1 paf 204: if(!result)
1.110 paf 205: bark("is '%s', it has no string representation");
1.6 paf 206:
1.1 paf 207: return *result;
208: }
209:
1.22 paf 210: /// throws exception specifying bark-reason and name() type() of problematic value
1.112 paf 211: Value* bark(const char *reason, const String *problem_source=0) const {
1.127 paf 212: //if(this) // removing warnings on unreachable code
1.129 misha 213: throw Exception(PARSER_RUNTIME,
1.117 paf 214: problem_source,
215: reason, type());
216:
1.127 paf 217: //return 0;
1.1 paf 218: }
219:
1.17 paf 220: };
1.110 paf 221:
1.48 paf 222:
223: /**
1.110 paf 224: $content-type[text/html] ->
225: content-type: text/html
1.130 misha 226: $content-type[$.value[text/html] $.charset[windows-1251]] ->
1.110 paf 227: content-type: text/html; charset=windows-1251
1.48 paf 228: */
1.110 paf 229: const String& attributed_meaning_to_string(Value& meaning,
230: String::Language lang,
1.128 misha 231: bool forced=false,
232: bool allow_bool=false);
1.110 paf 233:
234: // defines
235:
236: ///@{common field names
237: #define CHARSET_NAME "charset"
238: #define VALUE_NAME "value"
1.114 paf 239: #define EXPIRES_NAME "expires"
1.110 paf 240: #define CONTENT_TYPE_NAME "content-type"
1.119 paf 241: #define NAME_NAME "name"
1.110 paf 242: //@}
243:
244: ///@{common field names
245: extern const String value_name;
1.114 paf 246: extern const String expires_name;
1.110 paf 247: extern const String content_type_name;
248: extern const String name_name;
249: ///@}
1.1 paf 250:
1.145 ! moko 251: Value &memcached_deserialize(Serialization_data &data);
! 252:
1.1 paf 253: #endif
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