Drizzled Public API Documentation

all_fields.h
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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3  *
4  * Copyright (C) 2010 Brian Aker
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20 
21 #pragma once
22 
23 namespace drizzled {
24 namespace generator {
25 
26 typedef std::pair<const drizzled::message::Table *, int32_t> FieldPair;
27 
28 class AllFields
29 {
30  Session &session;
31  message::Table table_message;
32  drizzled::message::table::shared_ptr table_ptr;
33  int32_t field_iterator;
34 
35  drizzled::generator::AllTables all_tables_generator;
36 
37  bool table_setup();
38 
39 public:
40 
41  AllFields(Session &arg);
42 
43  void reset();
44 
45  operator const drizzled::message::Table::Field*()
46  {
47  if (table_ptr)
48  {
49  do {
50  if (field_iterator != table_message.field_size())
51  {
52  const message::Table::Field &field(table_message.field(field_iterator++));
53  return &field;
54  }
55 
56  } while ((table_ptr= all_tables_generator) && table_setup());
57  }
58 
59  return NULL;
60  }
61 
62  operator const FieldPair()
63  {
64  if (table_ptr)
65  {
66  do {
67  if (field_iterator != table_message.field_size())
68  {
69  return std::make_pair(&table_message, field_iterator++);
70  }
71  } while ((table_ptr= all_tables_generator) && table_setup());
72  }
73 
74  FieldPair null_pair;
75  return null_pair;
76  }
77 };
78 
79 } /* namespace generator */
80 } /* namespace drizzled */
81 
82 bool operator!(const drizzled::generator::FieldPair &arg);
83