mdb2schemamanager.php
4.26 KB
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
<?php
/**
* Copyright (c) 2012 Bart Visscher <bartv@thisnet.nl>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC\DB;
use Doctrine\DBAL\Platforms\MySqlPlatform;
use Doctrine\DBAL\Platforms\OraclePlatform;
use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
use Doctrine\DBAL\Platforms\SqlitePlatform;
class MDB2SchemaManager {
/**
* @var \OC\DB\Connection $conn
*/
protected $conn;
/**
* @param \OC\DB\Connection $conn
*/
public function __construct($conn) {
$this->conn = $conn;
}
/**
* saves database scheme to xml file
* @param string $file name of file
* @param int|string $mode
* @return bool
*
* TODO: write more documentation
*/
public function getDbStructure($file, $mode = MDB2_SCHEMA_DUMP_STRUCTURE) {
$sm = $this->conn->getSchemaManager();
return \OC_DB_MDB2SchemaWriter::saveSchemaToFile($file, $sm);
}
/**
* Creates tables from XML file
* @param string $file file to read structure from
* @return bool
*
* TODO: write more documentation
*/
public function createDbFromStructure($file) {
$schemaReader = new MDB2SchemaReader(\OC_Config::getObject(), $this->conn->getDatabasePlatform());
$toSchema = $schemaReader->loadSchemaFromFile($file);
return $this->executeSchemaChange($toSchema);
}
/**
* @return \OC\DB\Migrator
*/
public function getMigrator() {
$platform = $this->conn->getDatabasePlatform();
if ($platform instanceof SqlitePlatform) {
$config = \OC::$server->getConfig();
return new SQLiteMigrator($this->conn, $config);
} else if ($platform instanceof OraclePlatform) {
return new OracleMigrator($this->conn);
} else if ($platform instanceof MySqlPlatform) {
return new MySQLMigrator($this->conn);
} else if ($platform instanceof PostgreSqlPlatform) {
return new Migrator($this->conn);
} else {
return new NoCheckMigrator($this->conn);
}
}
/**
* Reads database schema from file
*
* @param string $file file to read from
*/
private function readSchemaFromFile($file) {
$platform = $this->conn->getDatabasePlatform();
$schemaReader = new MDB2SchemaReader(\OC_Config::getObject(), $platform);
return $schemaReader->loadSchemaFromFile($file);
}
/**
* update the database scheme
* @param string $file file to read structure from
* @param bool $generateSql only return the sql needed for the upgrade
* @return string|boolean
*/
public function updateDbFromStructure($file, $generateSql = false) {
$toSchema = $this->readSchemaFromFile($file);
$migrator = $this->getMigrator();
if ($generateSql) {
return $migrator->generateChangeScript($toSchema);
} else {
$migrator->migrate($toSchema);
return true;
}
}
/**
* update the database scheme
* @param string $file file to read structure from
* @return string|boolean
*/
public function simulateUpdateDbFromStructure($file) {
$toSchema = $this->readSchemaFromFile($file);
$this->getMigrator()->checkMigrate($toSchema);
return true;
}
/**
* @param \Doctrine\DBAL\Schema\Schema $schema
* @return string
*/
public function generateChangeScript($schema) {
$migrator = $this->getMigrator();
return $migrator->generateChangeScript($schema);
}
/**
* remove all tables defined in a database structure xml file
*
* @param string $file the xml file describing the tables
*/
public function removeDBStructure($file) {
$schemaReader = new MDB2SchemaReader(\OC_Config::getObject(), $this->conn->getDatabasePlatform());
$fromSchema = $schemaReader->loadSchemaFromFile($file);
$toSchema = clone $fromSchema;
/** @var $table \Doctrine\DBAL\Schema\Table */
foreach ($toSchema->getTables() as $table) {
$toSchema->dropTable($table->getName());
}
$comparator = new \Doctrine\DBAL\Schema\Comparator();
$schemaDiff = $comparator->compare($fromSchema, $toSchema);
$this->executeSchemaChange($schemaDiff);
}
/**
* @param \Doctrine\DBAL\Schema\Schema $schema
* @return bool
*/
private function executeSchemaChange($schema) {
$this->conn->beginTransaction();
foreach ($schema->toSql($this->conn->getDatabasePlatform()) as $sql) {
$this->conn->query($sql);
}
$this->conn->commit();
if ($this->conn->getDatabasePlatform() instanceof SqlitePlatform) {
\OC_DB::reconnect();
}
return true;
}
}