Annotation of parser3/src/types/pa_value.h, revision 1.142
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:
1.142 ! moko 11: static const char * const IDENT_VALUE_H="$Date: 2010-09-24 08:28:03 $";
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;
1.141 moko 40: const char* indent;
1.139 misha 41: enum Date { D_SQL, D_GMT, D_TIMESTAMP } date;
1.142 ! moko 42: enum Table { T_ARRAY, T_OBJECT, T_COMPACT } table;
1.139 misha 43: enum File { F_BODYLESS, F_BASE64, F_TEXT } file;
44:
45: Json_options(Request* arequest):
46: r(arequest),
47: methods(NULL),
48: params(NULL),
49: skip_unknown(false),
1.140 moko 50: indent(NULL),
1.139 misha 51: date(D_SQL),
52: table(T_OBJECT),
53: file(F_BODYLESS)
54: {}
55:
56: bool set_date_format(const String &value){
57: if(value == "gmt-string") date = D_GMT;
58: else if (value == "sql-string") date = D_SQL;
59: else if (value == "unix-timestamp") date = D_TIMESTAMP;
60: else return false;
61: return true;
62: }
63:
64: bool set_table_format(const String &value){
65: if(value == "array") table = T_ARRAY;
66: else if (value == "object") table = T_OBJECT;
1.142 ! moko 67: else if (value == "compact") table = T_COMPACT;
1.139 misha 68: else return false;
69: return true;
70: }
71:
72: bool set_file_format(const String &value){
73: if(value == "base64") file = F_BASE64;
74: else if (value == "text") file = F_TEXT;
75: else return false;
76: return true;
77: }
78: };
79:
1.31 paf 80: /// grandfather of all @a values in @b Parser
1.110 paf 81: class Value: public PA_Object {
1.1 paf 82: public: // Value
83:
1.106 paf 84: /// value type, used for error reporting and 'is' expression operator
1.110 paf 85: virtual const char* type() const =0;
1.89 paf 86:
87: /**
1.95 paf 88: all except VObject/VClass: this if @atype eq type()
89: VObject/VClass: can locate parent class by it's type
1.89 paf 90: */
1.134 misha 91: virtual Value* as(const char* atype) {
1.96 paf 92: return atype && strcmp(type(), atype)==0?this:0;
1.89 paf 93: }
1.97 paf 94: /// type checking helper, uses Value::as
1.134 misha 95: bool is(const char* atype) { return as(atype)!=0; }
1.59 parser 96:
1.106 paf 97: /// is this value defined?
1.38 paf 98: virtual bool is_defined() const { return true; }
1.59 parser 99:
1.106 paf 100: /// is this value string?
1.38 paf 101: virtual bool is_string() const { return false; }
1.124 paf 102:
103: /// is this value void?
104: virtual bool is_void() const { return false; }
105:
1.128 misha 106: /// is this value bool?
107: virtual bool is_bool() const { return false; }
108:
1.124 paf 109: /// is this value number?
1.126 paf 110: virtual bool is_evaluated_expr() const { return false; }
1.124 paf 111:
1.106 paf 112: /// what's the meaning of this value in context of expression?
1.110 paf 113: virtual Value& as_expr_result(bool /*return_string_as_is*/=false) {
1.112 paf 114: return *bark("is '%s', can not be used in expression");
1.34 paf 115: }
1.59 parser 116:
1.110 paf 117:
118:
119: /** extract HashStringValue if any
120: WARNING: FOR LOCAL USE ONLY, THIS POINTER IS NOT TO PASS TO ANYBODY!
121: */
122: virtual HashStringValue* get_hash() { return 0; }
1.59 parser 123:
1.106 paf 124: /// extract const String
1.110 paf 125: virtual const String* get_string() { return 0; }
1.136 misha 126:
1.139 misha 127: /// extract json-string
128: virtual const String* get_json_string(Json_options* options=0);
129:
1.136 misha 130: virtual HashStringValue* get_fields() { return 0; }
1.59 parser 131:
1.106 paf 132: /// extract double
1.110 paf 133: virtual double as_double() const { bark("is '%s', it does not have numerical (double) value"); return 0; }
1.59 parser 134:
1.106 paf 135: /// extract integer
1.110 paf 136: virtual int as_int () const { bark("is '%s', it does not have numerical (int) value"); return 0; }
1.59 parser 137:
1.106 paf 138: /// extract bool
1.110 paf 139: virtual bool as_bool() const { bark("is '%s', it does not have logical value"); return 0; }
1.59 parser 140:
1.106 paf 141: /// extract file
1.132 misha 142: virtual VFile* as_vfile(String::Language lang, const Request_charsets* charsets=0);
1.59 parser 143:
1.106 paf 144: /// extract Junction
1.110 paf 145: virtual Junction* get_junction();
1.59 parser 146:
1.120 paf 147: /// @return Value element; can return Junction for methods; Code-Junction for code; Getter-Junction for property
1.134 misha 148: virtual Value* get_element(const String& /*aname*/);
1.92 paf 149:
1.122 paf 150: /// indicator value meaning that put_element overwritten something
1.123 paf 151: #define PUT_ELEMENT_REPLACED_ELEMENT reinterpret_cast<const VJunction*>(1)
1.134 misha 152:
1.106 paf 153: /// store Value element under @a name
1.122 paf 154: /// @returns putter method junction, or it can just report[PUT_ELEMENT_REPLACED_ELEMENT]
155: /// that it replaced something in base fields
1.134 misha 156: virtual const VJunction* put_element(const String& aname, Value* /*avalue*/, bool /*areplace*/) {
1.65 parser 157: // to prevent modification of system classes,
158: // created at system startup, and not having exception
159: // handler installed, we neet to bark using request.pool
1.112 paf 160: bark("element can not be stored to %s", &aname);
1.120 paf 161: return 0;
1.65 parser 162: }
1.137 moko 163:
164: /// VObject default getter & setter support
165: virtual void enable_default_getter(){ }
166: virtual void enable_default_setter(){ }
167: virtual void disable_default_getter(){ }
168: virtual void disable_default_setter(){ }
169: virtual bool is_enabled_default_getter(){ return true; }
1.59 parser 170:
1.106 paf 171: /// extract VStateless_class
1.135 misha 172: virtual VStateless_class* get_class()=0;
1.107 paf 173:
1.135 misha 174: /// extract base class, if any
175: virtual VStateless_class* base() { return 0; }
1.32 paf 176:
1.106 paf 177: /// extract VTable
1.110 paf 178: virtual Table* get_table() { return 0; }
1.1 paf 179:
180: public: // usage
181:
1.26 paf 182: /// @return sure String. if it doesn't have string value barks
1.1 paf 183: const String& as_string() {
1.110 paf 184: const String* result=get_string();
1.1 paf 185: if(!result)
1.110 paf 186: bark("is '%s', it has no string representation");
1.6 paf 187:
1.1 paf 188: return *result;
189: }
190:
1.22 paf 191: /// throws exception specifying bark-reason and name() type() of problematic value
1.112 paf 192: Value* bark(const char *reason, const String *problem_source=0) const {
1.127 paf 193: //if(this) // removing warnings on unreachable code
1.129 misha 194: throw Exception(PARSER_RUNTIME,
1.117 paf 195: problem_source,
196: reason, type());
197:
1.127 paf 198: //return 0;
1.1 paf 199: }
200:
1.17 paf 201: };
1.110 paf 202:
1.48 paf 203:
204: /**
1.110 paf 205: $content-type[text/html] ->
206: content-type: text/html
1.130 misha 207: $content-type[$.value[text/html] $.charset[windows-1251]] ->
1.110 paf 208: content-type: text/html; charset=windows-1251
1.48 paf 209: */
1.110 paf 210: const String& attributed_meaning_to_string(Value& meaning,
211: String::Language lang,
1.128 misha 212: bool forced=false,
213: bool allow_bool=false);
1.110 paf 214:
215: // defines
216:
217: ///@{common field names
218: #define CHARSET_NAME "charset"
219: #define VALUE_NAME "value"
1.114 paf 220: #define EXPIRES_NAME "expires"
1.110 paf 221: #define CONTENT_TYPE_NAME "content-type"
1.119 paf 222: #define NAME_NAME "name"
1.110 paf 223: //@}
224:
225: ///@{common field names
226: extern const String value_name;
1.114 paf 227: extern const String expires_name;
1.110 paf 228: extern const String content_type_name;
229: extern const String name_name;
230: ///@}
1.1 paf 231:
232: #endif
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