Annotation of parser3/src/types/pa_vtable.h, revision 1.23
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:
1.23 ! paf 8: $Id: pa_vtable.h,v 1.22 2001/05/08 06:13:09 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) {
1.23 ! paf 31: int index=ftable->column_name2index(name, false);
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);
1.22 paf 35: else
36: return NEW VUnknown(pool());
1.18 paf 37: }
1.17 paf 38:
1.3 paf 39: // methods
1.2 paf 40: if(Value *result=VStateless_object::get_element(name))
41: return result;
1.1 paf 42:
1.18 paf 43: THROW(0, 0,
44: &name,
45: "column not found");
46: return 0; //unreached
1.1 paf 47: }
1.7 paf 48:
49: protected: // VAliased
50:
1.9 paf 51: /// disable .CLASS element. @see VAliased::get_element
1.13 paf 52: bool hide_class() { return true; }
1.1 paf 53:
54: public: // usage
55:
1.12 paf 56: VTable(Pool& apool, Table* atable=0) : VStateless_object(apool, *table_class),
1.21 paf 57: ftable(atable), locked(false) {
1.1 paf 58: }
1.16 paf 59: void lock() {
60: check_lock();
61: locked=true;
62: }
1.14 paf 63: void unlock() { locked=false; }
64: void set_table(Table& avalue) {
1.16 paf 65: check_lock();
1.14 paf 66: ftable=&avalue;
67: }
1.1 paf 68: Table& table() {
1.4 paf 69: if(!ftable)
1.1 paf 70: bark("getting unset vtable value");
71:
1.4 paf 72: return *ftable;
1.1 paf 73: }
74:
75: private:
76:
1.16 paf 77: void check_lock() {
78: if(locked)
79: bark("is locked");
80: }
1.18 paf 81:
82: private:
83:
84: Table *ftable;
85: bool locked;
1.1 paf 86:
87: };
88:
89: #endif
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