1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
// Copyright 2008, 2010, Oracle and/or its affiliates. All rights reserved.
//
// MySQL Connector/NET is licensed under the terms of the GPLv2
// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
// MySQL Connectors. There are special exceptions to the terms and
// conditions of the GPLv2 as it is applied to this software, see the
// FLOSS License Exception
// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published
// by the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
/*
* This file contains implementation of data object enumerator.
*/
using System;
using System.Data;
using System.Diagnostics;
using Microsoft.VisualStudio.Data;
using Microsoft.VisualStudio.Data.AdoDotNet;
using System.Data.Common;
namespace MySql.Data.VisualStudio
{
/// <summary>
/// Implements custom database objects enumerator for MySQL databases.
/// Uses information_schema database to enumerate objects.
/// </summary>
public class MySqlDataObjectEnumerator : AdoDotNetObjectEnumerator
{
/// <summary>
/// Enumerates items for a set of data objects of the specified type
/// with the specified restrictions and sort string, if supported.
/// </summary>
/// <param name="typeName">Name of the type of the object to enumerate.</param>
/// <param name="items">
/// The set of items to enumerate, specified as strings where named items are available,
/// otherwise as indexes. In cases in which a data provider does not support items
/// filtering, this parameter is ignored.
/// NOT SUPPORTED.
/// </param>
/// <param name="restrictions">
/// A set of filtering restrictions to apply to the set of returned objects.
/// </param>
/// <param name="sort">
/// A sort string, which follows syntax for the SQL Server ORDER BY clause.
/// The actual sort order should be source-based; that is, if the client is
/// English and the source is Chinese, the sort should be applied in Chinese.
/// NOT SUPPORTED.
/// </param>
/// <param name="parameters">
/// An array whose contents are defined by the given implementation of
/// EnumerateObjects, and which is specified by the Data Object Support
/// XML file. Information supplied in this parameter can be used to provide
/// extra data indicating how to perform the enumeration, allowing
/// implementations of this method to be more data driven.
/// NOT USED.
/// </param>
/// <returns>
/// Returns a DataReader object containing the results of the enumeration call.
/// </returns>
public override DataReader EnumerateObjects(string typeName,
object[] items, object[] restrictions, string sort, object[] parameters)
{
if (typeName == null)
throw new ArgumentNullException("typeName");
if (typeName == String.Empty)
return EnumerateRoot();
else return EnumerateSchemaObjects(parameters[0] as string, restrictions);
}
private DataReader EnumerateRoot()
{
DbConnection conn = (DbConnection)Connection.GetLockedProviderObject();
try
{
DataTable table = new DataTable();
table.Columns.Add("SERVER_NAME");
table.Columns.Add("CATALOG_NAME");
table.Columns.Add("SCHEMA_NAME");
DataRow row = table.NewRow();
row["SERVER_NAME"] = conn.DataSource;
row["SCHEMA_NAME"] = conn.Database;
table.Rows.Add(row);
return new AdoDotNetDataTableReader(table);
}
finally
{
Connection.UnlockProviderObject();
}
}
private DataReader EnumerateSchemaObjects(string typeName, object[] restrictions)
{
DbConnection conn = (DbConnection)Connection.GetLockedProviderObject();
try
{
string[] rest;
DataTable tables = null;
if (restrictions != null)
{
int i = 0;
rest = new string[restrictions.Length];
foreach (object o in restrictions)
rest[i++] = (string)o;
tables = conn.GetSchema(typeName, rest);
}
else
tables = conn.GetSchema(typeName);
foreach (DataRow row in tables.Rows)
row["TABLE_CATALOG"] = DBNull.Value;
return new AdoDotNetDataTableReader(tables);
}
finally
{
Connection.UnlockProviderObject();
}
}
/*
// Chose restricitions array
object[] appliedRestrictions;
if (typeName.Equals(RootDescriptor.TypeName, StringComparison.InvariantCultureIgnoreCase))
{
appliedRestrictions = new object[] {
ConnectionWrapper.ServerName,
ConnectionWrapper.Schema
};
}
else
{
appliedRestrictions = restrictions;
}
DataTable table;
try
{
// Enumerate objects into table
table = ObjectDescriptor.EnumerateObjects(ConnectionWrapper, typeName, appliedRestrictions, sort);
}
catch (DbException e)
{
SqlErrorDialog.ShowError(e, ConnectionWrapper.GetFullStatus());
throw;
}
catch (Exception e)
{
UIHelper.ShowError(e);
throw;
}
// Validate table
if (table == null)
{
Debug.Fail("Failed to enumerate objects of type '" + typeName + "'!");
return null;
}
// Enumerete objects in to DataReader
return new AdoDotNetDataTableReader(table);*/
#region Connection wrapper
/// <summary>
/// Returns wrapper for the underlying connection. Creates it at the first call.
/// </summary>
/* private DataConnectionWrapper ConnectionWrapper
{
get
{
if (connectionWrapperRef == null)
connectionWrapperRef = new DataConnectionWrapper(Connection);
return connectionWrapperRef;
}
}
/// <summary>
/// Used to stroe connection wrapper.
/// </summary>
private DataConnectionWrapper connectionWrapperRef;*/
#endregion
}
}
|
