Annotation of parser3/src/types/pa_value.h, revision 1.161
1.22 paf 1: /** @file
1.110 paf 2: Parser: Value, Method, Junction .
1.24 paf 3:
1.158 moko 4: Copyright (c) 2001-2015 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:
1.161 ! moko 11: #define IDENT_PA_VALUE_H "$Id: pa_value.h,v 1.160 2016/12/01 23:42:35 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"
1.157 moko 17: #include "pa_opcode.h"
1.1 paf 18:
1.99 paf 19: // forwards
20:
1.9 paf 21: class VStateless_class;
1.1 paf 22: class WContext;
1.133 misha 23: class Request;
24: class Request_charsets;
1.17 paf 25: class Junction;
1.123 paf 26: class VJunction;
1.17 paf 27: class Method;
1.131 misha 28: class Value;
1.64 parser 29: class MethodParams;
1.93 paf 30: class VObject;
1.99 paf 31: class VMethodFrame;
1.110 paf 32: class VFile;
33: class Table;
1.143 misha 34: struct XDocOutputOptions;
1.133 misha 35: typedef Array<Value*> ArrayValue;
1.1 paf 36:
1.139 misha 37: struct Json_options {
38: Request* r;
1.149 moko 39: String::Body key;
1.139 misha 40: HashStringValue* methods;
1.149 moko 41: Value* default_method;
1.139 misha 42: Value* params;
43: bool skip_unknown;
1.150 moko 44: uint json_string_recoursion;
1.141 moko 45: const char* indent;
1.143 misha 46: XDocOutputOptions* xdoc_options;
1.156 moko 47: enum Date { D_SQL, D_GMT, D_ISO, D_TIMESTAMP } date;
1.142 moko 48: enum Table { T_ARRAY, T_OBJECT, T_COMPACT } table;
1.139 misha 49: enum File { F_BODYLESS, F_BASE64, F_TEXT } file;
1.153 misha 50: enum Void { V_NULL, V_STRING } fvoid;
1.139 misha 51:
1.149 moko 52: Json_options(Request* arequest):
1.139 misha 53: r(arequest),
54: methods(NULL),
1.149 moko 55: default_method(NULL),
1.139 misha 56: params(NULL),
57: skip_unknown(false),
1.150 moko 58: json_string_recoursion(0),
1.140 moko 59: indent(NULL),
1.161 ! moko 60: xdoc_options(NULL),
1.139 misha 61: date(D_SQL),
62: table(T_OBJECT),
1.153 misha 63: file(F_BODYLESS),
64: fvoid(V_NULL)
1.139 misha 65: {}
66:
67: bool set_date_format(const String &value){
1.156 moko 68: if(value == "sql-string") date = D_SQL;
69: else if (value == "gmt-string") date = D_GMT;
70: else if (value == "iso-string") date = D_ISO;
1.139 misha 71: else if (value == "unix-timestamp") date = D_TIMESTAMP;
72: else return false;
73: return true;
74: }
75:
76: bool set_table_format(const String &value){
77: if(value == "array") table = T_ARRAY;
78: else if (value == "object") table = T_OBJECT;
1.142 moko 79: else if (value == "compact") table = T_COMPACT;
1.139 misha 80: else return false;
81: return true;
82: }
83:
84: bool set_file_format(const String &value){
85: if(value == "base64") file = F_BASE64;
86: else if (value == "text") file = F_TEXT;
1.148 misha 87: else if (value == "stat") file = F_BODYLESS;
1.139 misha 88: else return false;
89: return true;
90: }
1.149 moko 91:
1.153 misha 92: bool set_void_format(const String &value){
93: if(value == "null") fvoid = V_NULL;
94: else if(value == "string") fvoid = V_STRING;
95: else return false;
96: return true;
97: }
98:
1.155 moko 99: const String* hash_json_string(HashStringValue *hash);
1.139 misha 100: };
101:
1.31 paf 102: /// grandfather of all @a values in @b Parser
1.110 paf 103: class Value: public PA_Object {
1.1 paf 104: public: // Value
105:
1.106 paf 106: /// value type, used for error reporting and 'is' expression operator
1.110 paf 107: virtual const char* type() const =0;
1.89 paf 108:
109: /**
1.95 paf 110: all except VObject/VClass: this if @atype eq type()
111: VObject/VClass: can locate parent class by it's type
1.89 paf 112: */
1.134 misha 113: virtual Value* as(const char* atype) {
1.96 paf 114: return atype && strcmp(type(), atype)==0?this:0;
1.89 paf 115: }
1.97 paf 116: /// type checking helper, uses Value::as
1.134 misha 117: bool is(const char* atype) { return as(atype)!=0; }
1.59 parser 118:
1.106 paf 119: /// is this value defined?
1.38 paf 120: virtual bool is_defined() const { return true; }
1.59 parser 121:
1.106 paf 122: /// is this value string?
1.38 paf 123: virtual bool is_string() const { return false; }
1.124 paf 124:
125: /// is this value void?
126: virtual bool is_void() const { return false; }
127:
1.128 misha 128: /// is this value bool?
129: virtual bool is_bool() const { return false; }
130:
1.124 paf 131: /// is this value number?
1.126 paf 132: virtual bool is_evaluated_expr() const { return false; }
1.124 paf 133:
1.106 paf 134: /// what's the meaning of this value in context of expression?
1.147 moko 135: virtual Value& as_expr_result() {
1.112 paf 136: return *bark("is '%s', can not be used in expression");
1.34 paf 137: }
1.59 parser 138:
1.110 paf 139:
140:
141: /** extract HashStringValue if any
142: WARNING: FOR LOCAL USE ONLY, THIS POINTER IS NOT TO PASS TO ANYBODY!
143: */
144: virtual HashStringValue* get_hash() { return 0; }
1.59 parser 145:
1.106 paf 146: /// extract const String
1.110 paf 147: virtual const String* get_string() { return 0; }
1.136 misha 148:
1.139 misha 149: /// extract json-string
1.149 moko 150: virtual const String* get_json_string(Json_options& options);
1.154 misha 151: const String* default_method_2_json_string(Value& default_method, Json_options& options);
1.139 misha 152:
1.136 misha 153: virtual HashStringValue* get_fields() { return 0; }
1.159 moko 154: virtual HashStringValue* get_fields_reference() { return 0; }
1.59 parser 155:
1.106 paf 156: /// extract double
1.110 paf 157: virtual double as_double() const { bark("is '%s', it does not have numerical (double) value"); return 0; }
1.59 parser 158:
1.106 paf 159: /// extract integer
1.110 paf 160: virtual int as_int () const { bark("is '%s', it does not have numerical (int) value"); return 0; }
1.59 parser 161:
1.106 paf 162: /// extract bool
1.110 paf 163: virtual bool as_bool() const { bark("is '%s', it does not have logical value"); return 0; }
1.59 parser 164:
1.106 paf 165: /// extract file
1.132 misha 166: virtual VFile* as_vfile(String::Language lang, const Request_charsets* charsets=0);
1.59 parser 167:
1.106 paf 168: /// extract Junction
1.110 paf 169: virtual Junction* get_junction();
1.59 parser 170:
1.120 paf 171: /// @return Value element; can return Junction for methods; Code-Junction for code; Getter-Junction for property
1.134 misha 172: virtual Value* get_element(const String& /*aname*/);
1.92 paf 173:
1.157 moko 174: #ifdef FEATURE_GET_ELEMENT4CALL
175: /// same as get_element, but methods have higher priority in table and hash
176: virtual Value* get_element4call(const String& aname){
177: return get_element(aname);
178: }
179: #endif
180:
1.122 paf 181: /// indicator value meaning that put_element overwritten something
1.123 paf 182: #define PUT_ELEMENT_REPLACED_ELEMENT reinterpret_cast<const VJunction*>(1)
1.134 misha 183:
1.106 paf 184: /// store Value element under @a name
1.122 paf 185: /// @returns putter method junction, or it can just report[PUT_ELEMENT_REPLACED_ELEMENT]
186: /// that it replaced something in base fields
1.151 moko 187: virtual const VJunction* put_element(const String& aname, Value* /*avalue*/) {
1.65 parser 188: // to prevent modification of system classes,
189: // created at system startup, and not having exception
190: // handler installed, we neet to bark using request.pool
1.112 paf 191: bark("element can not be stored to %s", &aname);
1.120 paf 192: return 0;
1.65 parser 193: }
1.137 moko 194:
195: /// VObject default getter & setter support
196: virtual void enable_default_getter(){ }
197: virtual void enable_default_setter(){ }
198: virtual void disable_default_getter(){ }
199: virtual void disable_default_setter(){ }
200: virtual bool is_enabled_default_getter(){ return true; }
1.152 moko 201: virtual bool is_enabled_default_setter(){ return true; }
1.59 parser 202:
1.106 paf 203: /// extract VStateless_class
1.135 misha 204: virtual VStateless_class* get_class()=0;
1.107 paf 205:
1.135 misha 206: /// extract base class, if any
207: virtual VStateless_class* base() { return 0; }
1.32 paf 208:
1.106 paf 209: /// extract VTable
1.110 paf 210: virtual Table* get_table() { return 0; }
1.1 paf 211:
212: public: // usage
213:
1.160 moko 214: /// @return sure String or barks if it doesn't have string value
1.1 paf 215: const String& as_string() {
1.160 moko 216: const String* result=get_string();
1.1 paf 217: if(!result)
1.110 paf 218: bark("is '%s', it has no string representation");
1.6 paf 219:
1.1 paf 220: return *result;
221: }
222:
1.160 moko 223: /// @return Hash or barks if it is not hash compatible
224: HashStringValue* as_hash(const char* name=0);
225:
1.22 paf 226: /// throws exception specifying bark-reason and name() type() of problematic value
1.112 paf 227: Value* bark(const char *reason, const String *problem_source=0) const {
1.127 paf 228: //if(this) // removing warnings on unreachable code
1.129 misha 229: throw Exception(PARSER_RUNTIME,
1.117 paf 230: problem_source,
231: reason, type());
232:
1.127 paf 233: //return 0;
1.1 paf 234: }
235:
1.17 paf 236: };
1.110 paf 237:
1.48 paf 238:
239: /**
1.110 paf 240: $content-type[text/html] ->
241: content-type: text/html
1.130 misha 242: $content-type[$.value[text/html] $.charset[windows-1251]] ->
1.110 paf 243: content-type: text/html; charset=windows-1251
1.48 paf 244: */
1.110 paf 245: const String& attributed_meaning_to_string(Value& meaning,
246: String::Language lang,
1.128 misha 247: bool forced=false,
248: bool allow_bool=false);
1.110 paf 249:
250: // defines
251:
252: ///@{common field names
253: #define CHARSET_NAME "charset"
254: #define VALUE_NAME "value"
1.114 paf 255: #define EXPIRES_NAME "expires"
1.110 paf 256: #define CONTENT_TYPE_NAME "content-type"
1.119 paf 257: #define NAME_NAME "name"
1.110 paf 258: //@}
259:
260: ///@{common field names
261: extern const String value_name;
1.114 paf 262: extern const String expires_name;
1.110 paf 263: extern const String content_type_name;
264: extern const String name_name;
265: ///@}
1.1 paf 266:
267: #endif
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