Annotation of parser3/src/include/pa_table.h, revision 1.48.2.6
1.14 paf 1: /** @file
1.15 paf 2: Parser: table class decl.
3:
1.48 paf 4: Copyright (c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com)
1.41 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 6: */
7:
8: #ifndef PA_TABLE_H
9: #define PA_TABLE_H
1.45 paf 10:
1.48.2.6! paf 11: static const char* IDENT_TABLE_H="$Date: 2003/01/27 16:00:42 $";
1.1 paf 12:
13: #include "pa_types.h"
14: #include "pa_hash.h"
1.2 paf 15: #include "pa_string.h"
1.1 paf 16:
1.16 paf 17: /**
1.19 paf 18: VTable backend.
1.16 paf 19:
20: holds:
1.14 paf 21: - column names[if any]
22: - data rows
23: - current row pointer
24:
25: uses String for column names and data items
26:
1.28 paf 27: hence most of tables are "named", no need to uptimize nameless onces.
28: rows and strings stored are read-only. once stored they can be removed,
29: but not altered. that's handy for quick copying & co. see table:join
1.14 paf 30: */
1.48.2.4 paf 31: class Table: public Array<object_ptr<const Array<ConstStringPtr > > > {
1.1 paf 32: public:
1.48.2.4 paf 33: typedef object_ptr<const Array<ConstStringPtr> > columns_type;
1.1 paf 34:
1.48.2.1 paf 35: Table(
1.48.2.3 paf 36: ConstStringPtr aorigin_string,
1.48.2.4 paf 37: columns_type acolumns,
1.48.2.1 paf 38: int initial_rows=3);
39: Table(const Table& src, int offset=0, int limit=0);
1.2 paf 40:
1.21 paf 41: /// where this table came from, may be NULL
1.48.2.3 paf 42: ConstStringPtr origin_string() { return forigin_string; }
1.21 paf 43:
1.42 paf 44: /// gets column names
1.48.2.4 paf 45: columns_type columns() { return fcolumns; }
1.5 paf 46:
1.18 paf 47: /// moves @a current pointer
1.5 paf 48: void set_current(int acurrent) { fcurrent=acurrent; }
1.17 paf 49: /// @return current pointer
1.47 paf 50: int current() const { return fcurrent; }
1.37 paf 51: void offset(bool absolute, int offset);
1.5 paf 52:
1.32 paf 53: /** @return column index from @a column_name. '<0' if no such column
1.48.2.1 paf 54: if no such - 'bark'
1.32 paf 55: */
1.48.2.4 paf 56: int column_name2index(ConstStringPtr column, bool bark) const;
1.30 paf 57:
1.26 paf 58: /// @return item from @a column
1.48.2.4 paf 59: ConstStringPtr item(int column) const;
1.30 paf 60:
61: /// @return item from @a column. '0' if no such column
1.48.2.4 paf 62: ConstStringPtr item(ConstStringPtr column) const {
1.32 paf 63: int index=column_name2index(column, false);
1.48.2.4 paf 64: return index>=0?item(index):ConstStringPtr(0);
1.24 paf 65: }
1.23 paf 66:
67: /// saves to text file
1.48.2.2 paf 68: void save(bool nameless_save, object_ptr<const String> file_spec);
1.2 paf 69:
1.48.2.4 paf 70: bool locate(int column, ConstStringPtr value);
71: bool locate(object_ptr<const String> column, ConstStringPtr value);
1.24 paf 72:
1.48.2.1 paf 73: element_type at(int index) const {
74: return get(index);
1.27 paf 75: }
76:
1.12 paf 77: private:
1.21 paf 78:
79: // where this table came from, may be NULL
1.48.2.3 paf 80: ConstStringPtr forigin_string;
1.1 paf 81:
1.5 paf 82: // current row
83: int fcurrent;
84:
85: // columns
1.48.2.4 paf 86: columns_type fcolumns;
1.48.2.1 paf 87:
88: // column names are already referenced in fcolumns, no need to doublecheck references here
89: // column name->number lookup table
1.48.2.5 paf 90: typedef Hash<const String&, int> name2number_hash_class;
1.48.2.1 paf 91: object_ptr<name2number_hash_class> name2number;
92:
93: // we own columns?
1.5 paf 94:
1.48.2.1 paf 95: bool valid(int index) const { return index>=0 && index<count(); }
1.2 paf 96:
1.1 paf 97: };
1.48.2.3 paf 98:
99: typedef object_ptr<Table> TablePtr;
1.1 paf 100:
101: #endif
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