Annotation of parser3/src/types/pa_value.h, revision 1.139
1.22 paf 1: /** @file
1.110 paf 2: Parser: Value, Method, Junction .
1.24 paf 3:
1.131 misha 4: Copyright (c) 2001-2009 ArtLebedev Group (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:
1.139 ! misha 11: static const char * const IDENT_VALUE_H="$Date: 2010-09-06 21:17:49 $";
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;
1.133 misha 33: typedef Array<Value*> ArrayValue;
1.1 paf 34:
1.139 ! misha 35: struct Json_options {
! 36: Request* r;
! 37: HashStringValue* methods;
! 38: Value* params;
! 39: bool skip_unknown;
! 40: enum Date { D_SQL, D_GMT, D_TIMESTAMP } date;
! 41: enum Table { T_ARRAY, T_OBJECT } table;
! 42: enum File { F_BODYLESS, F_BASE64, F_TEXT } file;
! 43:
! 44: Json_options(Request* arequest):
! 45: r(arequest),
! 46: methods(NULL),
! 47: params(NULL),
! 48: skip_unknown(false),
! 49: date(D_SQL),
! 50: table(T_OBJECT),
! 51: file(F_BODYLESS)
! 52: {}
! 53:
! 54: bool set_date_format(const String &value){
! 55: if(value == "gmt-string") date = D_GMT;
! 56: else if (value == "sql-string") date = D_SQL;
! 57: else if (value == "unix-timestamp") date = D_TIMESTAMP;
! 58: else return false;
! 59: return true;
! 60: }
! 61:
! 62: bool set_table_format(const String &value){
! 63: if(value == "array") table = T_ARRAY;
! 64: else if (value == "object") table = T_OBJECT;
! 65: else return false;
! 66: return true;
! 67: }
! 68:
! 69: bool set_file_format(const String &value){
! 70: if(value == "base64") file = F_BASE64;
! 71: else if (value == "text") file = F_TEXT;
! 72: else return false;
! 73: return true;
! 74: }
! 75: };
! 76:
1.31 paf 77: /// grandfather of all @a values in @b Parser
1.110 paf 78: class Value: public PA_Object {
1.1 paf 79: public: // Value
80:
1.106 paf 81: /// value type, used for error reporting and 'is' expression operator
1.110 paf 82: virtual const char* type() const =0;
1.89 paf 83:
84: /**
1.95 paf 85: all except VObject/VClass: this if @atype eq type()
86: VObject/VClass: can locate parent class by it's type
1.89 paf 87: */
1.134 misha 88: virtual Value* as(const char* atype) {
1.96 paf 89: return atype && strcmp(type(), atype)==0?this:0;
1.89 paf 90: }
1.97 paf 91: /// type checking helper, uses Value::as
1.134 misha 92: bool is(const char* atype) { return as(atype)!=0; }
1.59 parser 93:
1.106 paf 94: /// is this value defined?
1.38 paf 95: virtual bool is_defined() const { return true; }
1.59 parser 96:
1.106 paf 97: /// is this value string?
1.38 paf 98: virtual bool is_string() const { return false; }
1.124 paf 99:
100: /// is this value void?
101: virtual bool is_void() const { return false; }
102:
1.128 misha 103: /// is this value bool?
104: virtual bool is_bool() const { return false; }
105:
1.124 paf 106: /// is this value number?
1.126 paf 107: virtual bool is_evaluated_expr() const { return false; }
1.124 paf 108:
1.106 paf 109: /// what's the meaning of this value in context of expression?
1.110 paf 110: virtual Value& as_expr_result(bool /*return_string_as_is*/=false) {
1.112 paf 111: return *bark("is '%s', can not be used in expression");
1.34 paf 112: }
1.59 parser 113:
1.110 paf 114:
115:
116: /** extract HashStringValue if any
117: WARNING: FOR LOCAL USE ONLY, THIS POINTER IS NOT TO PASS TO ANYBODY!
118: */
119: virtual HashStringValue* get_hash() { return 0; }
1.59 parser 120:
1.106 paf 121: /// extract const String
1.110 paf 122: virtual const String* get_string() { return 0; }
1.136 misha 123:
1.139 ! misha 124: /// extract json-string
! 125: virtual const String* get_json_string(Json_options* options=0);
! 126:
1.136 misha 127: virtual HashStringValue* get_fields() { return 0; }
1.59 parser 128:
1.106 paf 129: /// extract double
1.110 paf 130: virtual double as_double() const { bark("is '%s', it does not have numerical (double) value"); return 0; }
1.59 parser 131:
1.106 paf 132: /// extract integer
1.110 paf 133: virtual int as_int () const { bark("is '%s', it does not have numerical (int) value"); return 0; }
1.59 parser 134:
1.106 paf 135: /// extract bool
1.110 paf 136: virtual bool as_bool() const { bark("is '%s', it does not have logical value"); return 0; }
1.59 parser 137:
1.106 paf 138: /// extract file
1.132 misha 139: virtual VFile* as_vfile(String::Language lang, const Request_charsets* charsets=0);
1.59 parser 140:
1.106 paf 141: /// extract Junction
1.110 paf 142: virtual Junction* get_junction();
1.59 parser 143:
1.120 paf 144: /// @return Value element; can return Junction for methods; Code-Junction for code; Getter-Junction for property
1.134 misha 145: virtual Value* get_element(const String& /*aname*/);
1.92 paf 146:
1.122 paf 147: /// indicator value meaning that put_element overwritten something
1.123 paf 148: #define PUT_ELEMENT_REPLACED_ELEMENT reinterpret_cast<const VJunction*>(1)
1.134 misha 149:
1.106 paf 150: /// store Value element under @a name
1.122 paf 151: /// @returns putter method junction, or it can just report[PUT_ELEMENT_REPLACED_ELEMENT]
152: /// that it replaced something in base fields
1.134 misha 153: virtual const VJunction* put_element(const String& aname, Value* /*avalue*/, bool /*areplace*/) {
1.65 parser 154: // to prevent modification of system classes,
155: // created at system startup, and not having exception
156: // handler installed, we neet to bark using request.pool
1.112 paf 157: bark("element can not be stored to %s", &aname);
1.120 paf 158: return 0;
1.65 parser 159: }
1.137 moko 160:
161: /// VObject default getter & setter support
162: virtual void enable_default_getter(){ }
163: virtual void enable_default_setter(){ }
164: virtual void disable_default_getter(){ }
165: virtual void disable_default_setter(){ }
166: virtual bool is_enabled_default_getter(){ return true; }
1.59 parser 167:
1.106 paf 168: /// extract VStateless_class
1.135 misha 169: virtual VStateless_class* get_class()=0;
1.107 paf 170:
1.135 misha 171: /// extract base class, if any
172: virtual VStateless_class* base() { return 0; }
1.32 paf 173:
1.106 paf 174: /// extract VTable
1.110 paf 175: virtual Table* get_table() { return 0; }
1.1 paf 176:
177: public: // usage
178:
1.26 paf 179: /// @return sure String. if it doesn't have string value barks
1.1 paf 180: const String& as_string() {
1.110 paf 181: const String* result=get_string();
1.1 paf 182: if(!result)
1.110 paf 183: bark("is '%s', it has no string representation");
1.6 paf 184:
1.1 paf 185: return *result;
186: }
187:
1.22 paf 188: /// throws exception specifying bark-reason and name() type() of problematic value
1.112 paf 189: Value* bark(const char *reason, const String *problem_source=0) const {
1.127 paf 190: //if(this) // removing warnings on unreachable code
1.129 misha 191: throw Exception(PARSER_RUNTIME,
1.117 paf 192: problem_source,
193: reason, type());
194:
1.127 paf 195: //return 0;
1.1 paf 196: }
197:
1.17 paf 198: };
1.110 paf 199:
1.48 paf 200:
201: /**
1.110 paf 202: $content-type[text/html] ->
203: content-type: text/html
1.130 misha 204: $content-type[$.value[text/html] $.charset[windows-1251]] ->
1.110 paf 205: content-type: text/html; charset=windows-1251
1.48 paf 206: */
1.110 paf 207: const String& attributed_meaning_to_string(Value& meaning,
208: String::Language lang,
1.128 misha 209: bool forced=false,
210: bool allow_bool=false);
1.110 paf 211:
212: // defines
213:
214: ///@{common field names
215: #define CHARSET_NAME "charset"
216: #define VALUE_NAME "value"
1.114 paf 217: #define EXPIRES_NAME "expires"
1.110 paf 218: #define CONTENT_TYPE_NAME "content-type"
1.119 paf 219: #define NAME_NAME "name"
1.110 paf 220: //@}
221:
222: ///@{common field names
223: extern const String value_name;
1.114 paf 224: extern const String expires_name;
1.110 paf 225: extern const String content_type_name;
226: extern const String name_name;
227: ///@}
1.1 paf 228:
229: #endif
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