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Annotation of parser3/src/types/pa_vobject.h, revision 1.44.2.5

1.6       paf         1: /**    @file
1.7       paf         2:        Parser: @b object class decl.
                      3: 
1.42      paf         4:        Copyright (c) 2001-2004 ArtLebedev Group (http://www.artlebedev.com)
1.16      paf         5:        Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1       paf         6: */
                      7: 
                      8: #ifndef PA_VOBJECT_H
                      9: #define PA_VOBJECT_H
                     10: 
1.44.2.5! paf        11: static const char * const IDENT_VOBJECT_H="$Date: 2005/07/27 14:06:48 $";
1.39      paf        12: 
                     13: // includes
1.19      paf        14: 
1.1       paf        15: #include "pa_vjunction.h"
                     16: #include "pa_vclass.h"
1.4       paf        17: #include "pa_vstateless_object.h"
1.39      paf        18: #include "pa_vfile.h"
1.6       paf        19: 
1.23      paf        20: // defines
                     21: 
                     22: #define BASE_NAME "BASE"
                     23: 
1.26      paf        24: /**    parser class instance, stores 
                     25:        - class VObject::fclass;
                     26:        - fields VObject::ffields (dynamic, not static, which are stored in class).
                     27:        - links to base/derived instances [VObject::fbase, VObject::fderived]
1.6       paf        28: */
1.24      paf        29: class VObject: public VStateless_object {
1.39      paf        30: 
                     31:        VStateless_class& fclass;
1.44.2.1  paf        32:        HashStringValue& ffields;
1.39      paf        33:        VObject* fderived;
                     34:        Value* fbase;
                     35: 
1.1       paf        36: public: // Value
                     37:        
1.39      paf        38:        const char* type() const { return fclass.name_cstr(); }
                     39:        override Value* as(const char* atype, bool looking_up);
1.12      parser     40: 
1.25      paf        41:        /// VObject: fclass
1.39      paf        42:        override VStateless_class *get_class() { return &fclass; }
                     43:        override VStateless_class *get_last_derived_class() { return get_last_derived().get_class(); }
                     44:        override Value* base() { return fbase; }
                     45: 
                     46:        override bool is_defined() const;
                     47:        override Value& as_expr_result(bool);
                     48:        override int as_int() const;
                     49:        override double as_double();
                     50:        override bool as_bool() const;
                     51:        override VFile* as_vfile(String::Language lang=String::L_UNSPECIFIED, 
                     52:                const Request_charsets *charsets=0);
1.33      paf        53:        
1.39      paf        54:        override HashStringValue* get_hash();
                     55:        override Table *get_table();
1.33      paf        56: 
1.39      paf        57:        override Value* get_element(const String& aname, Value& aself, bool /*looking_up*/);
1.44.2.5! paf        58:        override const Junction* put_element(Value& self, const String& name, Value* value, bool replace);
1.1       paf        59: 
1.37      paf        60:        /// VObject: remember derived [the only client]
1.39      paf        61:        override VObject* set_derived(VObject* aderived) { 
                     62:                VObject* result=fderived;
1.25      paf        63:                fderived=aderived;
1.34      paf        64:                return result;
1.24      paf        65:        }
                     66: 
1.1       paf        67: public: // creation
                     68: 
1.44.2.4  paf        69:        VObject(Pool& apool, VStateless_class& aclass, HashStringValue& afields): fclass(aclass), ffields(afields), fderived(0) {
1.39      paf        70:                if(VStateless_class* base_class=fclass.base_class())
1.44.2.1  paf        71:                        (fbase=base_class->create_new_value(apool, afields))->set_derived(this);
1.1       paf        72:        }
                     73: 
                     74: private:
                     75: 
1.37      paf        76:        VObject& get_last_derived() {
                     77:                return fderived?fderived->get_last_derived():*this;
1.26      paf        78:        }
1.37      paf        79: 
1.44.2.2  paf        80:        Value* stateless_object__get_element(const String& aname, Value& aself) {
                     81:                return VStateless_object::get_element(aname, aself, false);
                     82:        }
                     83: 
                     84:        const Junction* stateless_object__put_element(Value& aself, const String& aname, Value* avalue) {
1.44.2.5! paf        85:                return VStateless_object::put_element(aself, aname, avalue, true/*try to replace! NEVER overwrite*/);
1.44.2.2  paf        86:        }
                     87: 
                     88:        struct Prevent_append_if_exists_in_static_or_base_info {
                     89:                VObject* _this;
                     90:                const String* name;
                     91:        };
                     92:        static const Junction* prevent_append_if_exists_in_static_or_base(Value* value, 
                     93:                Prevent_append_if_exists_in_static_or_base_info* info);
                     94: 
1.25      paf        95: };
                     96: 
                     97: class Temp_derived {
                     98:        Value& fvalue;
1.39      paf        99:        VObject* fsaved_derived;
1.25      paf       100: public:
1.39      paf       101:        Temp_derived(Value& avalue, VObject* aderived) : 
1.25      paf       102:                fvalue(avalue),
                    103:                fsaved_derived(avalue.set_derived(aderived)) {}
                    104:        ~Temp_derived() { fvalue.set_derived(fsaved_derived); }
1.1       paf       105: };
                    106: 
                    107: #endif