Annotation of parser3/src/types/pa_vtable.h, revision 1.21
1.6 paf 1: /** @file
1.15 paf 2: Parser: @b table parser class decl.
1.6 paf 3:
1.1 paf 4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.6 paf 5:
1.1 paf 6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
7:
1.21 ! paf 8: $Id: pa_vtable.h,v 1.20 2001/05/07 14:00:55 paf Exp $
1.1 paf 9: */
10:
11: #ifndef PA_VTABLE_H
12: #define PA_VTABLE_H
13:
14: #include "pa_vstateless_object.h"
15: #include "pa_table.h"
16: #include "pa_vunknown.h"
17:
1.16 paf 18: extern Methoded *table_class;
19:
1.6 paf 20: /// value of type 'table'. implemented with Table
1.1 paf 21: class VTable : public VStateless_object {
22: public: // Value
23:
24: const char *type() const { return "table"; }
1.6 paf 25: /// extract VTable
1.10 paf 26: Table *get_table() { return ftable; }
1.18 paf 27: /// VTable: columns,methods
1.1 paf 28: Value *get_element(const String& name) {
1.17 paf 29: // columns
1.18 paf 30: if(ftable) {
31: int index=ftable->column_name2index(name);
1.19 paf 32: if(index>=0) // column name|number valid
33: if(const String *string=ftable->item(index)) // there is such column
34: return NEW VString(*string);
1.18 paf 35: }
1.17 paf 36:
1.3 paf 37: // methods
1.2 paf 38: if(Value *result=VStateless_object::get_element(name))
39: return result;
1.1 paf 40:
1.18 paf 41: THROW(0, 0,
42: &name,
43: "column not found");
44: return 0; //unreached
1.1 paf 45: }
1.7 paf 46:
47: protected: // VAliased
48:
1.9 paf 49: /// disable .CLASS element. @see VAliased::get_element
1.13 paf 50: bool hide_class() { return true; }
1.1 paf 51:
52: public: // usage
53:
1.12 paf 54: VTable(Pool& apool, Table* atable=0) : VStateless_object(apool, *table_class),
1.21 ! paf 55: ftable(atable), locked(false) {
1.1 paf 56: }
1.16 paf 57: void lock() {
58: check_lock();
59: locked=true;
60: }
1.14 paf 61: void unlock() { locked=false; }
62: void set_table(Table& avalue) {
1.16 paf 63: check_lock();
1.14 paf 64: ftable=&avalue;
65: }
1.1 paf 66: Table& table() {
1.4 paf 67: if(!ftable)
1.1 paf 68: bark("getting unset vtable value");
69:
1.4 paf 70: return *ftable;
1.1 paf 71: }
72:
73: private:
74:
1.16 paf 75: void check_lock() {
76: if(locked)
77: bark("is locked");
78: }
1.18 paf 79:
80: private:
81:
82: Table *ftable;
83: bool locked;
1.1 paf 84:
85: };
86:
87: #endif
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