diff options
author | ctrlaltca <> | 2012-07-12 11:21:01 +0000 |
---|---|---|
committer | ctrlaltca <> | 2012-07-12 11:21:01 +0000 |
commit | 903ae8a581fac1e6917fc3e31d2ad8fb91df80c3 (patch) | |
tree | e08bf04f0823650a231227ac3499121270172a23 /framework/Data/TDbConnection.php | |
parent | 3e4e6e66aeb3f8fea4e1eb4237498ef9d2358f63 (diff) |
standardize the use of unix eol; use svn properties to enforce native eol
Diffstat (limited to 'framework/Data/TDbConnection.php')
-rw-r--r-- | framework/Data/TDbConnection.php | 1366 |
1 files changed, 683 insertions, 683 deletions
diff --git a/framework/Data/TDbConnection.php b/framework/Data/TDbConnection.php index 0fd17ae1..fb93f076 100644 --- a/framework/Data/TDbConnection.php +++ b/framework/Data/TDbConnection.php @@ -1,685 +1,685 @@ -<?php
-/**
- * TDbConnection class file
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.pradosoft.com/
- * @copyright Copyright © 2005-2012 PradoSoft
- * @license http://www.pradosoft.com/license/
- * @version $Id$
- * @package System.Data
- */
-
-Prado::using('System.Data.TDbTransaction');
-Prado::using('System.Data.TDbCommand');
-
-/**
- * TDbConnection class
- *
- * TDbConnection represents a connection to a database.
- *
- * TDbConnection works together with {@link TDbCommand}, {@link TDbDataReader}
- * and {@link TDbTransaction} to provide data access to various DBMS
- * in a common set of APIs. They are a thin wrapper of the {@link http://www.php.net/manual/en/ref.pdo.php PDO}
- * PHP extension.
- *
- * To establish a connection, set {@link setActive Active} to true after
- * specifying {@link setConnectionString ConnectionString}, {@link setUsername Username}
- * and {@link setPassword Password}.
- *
- * Since 3.1.2, the connection charset can be set (for MySQL and PostgreSQL databases only)
- * using the {@link setCharset Charset} property. The value of this property is database dependant.
- * e.g. for mysql, you can use 'latin1' for cp1252 West European, 'utf8' for unicode, ...
- *
- * The following example shows how to create a TDbConnection instance and establish
- * the actual connection:
- * <code>
- * $connection=new TDbConnection($dsn,$username,$password);
- * $connection->Active=true;
- * </code>
- *
- * After the DB connection is established, one can execute an SQL statement like the following:
- * <code>
- * $command=$connection->createCommand($sqlStatement);
- * $command->execute(); // a non-query SQL statement execution
- * // or execute an SQL query and fetch the result set
- * $reader=$command->query();
- *
- * // each $row is an array representing a row of data
- * foreach($reader as $row) ...
- * </code>
- *
- * One can do prepared SQL execution and bind parameters to the prepared SQL:
- * <code>
- * $command=$connection->createCommand($sqlStatement);
- * $command->bindParameter($name1,$value1);
- * $command->bindParameter($name2,$value2);
- * $command->execute();
- * </code>
- *
- * To use transaction, do like the following:
- * <code>
- * $transaction=$connection->beginTransaction();
- * try
- * {
- * $connection->createCommand($sql1)->execute();
- * $connection->createCommand($sql2)->execute();
- * //.... other SQL executions
- * $transaction->commit();
- * }
- * catch(Exception $e)
- * {
- * $transaction->rollBack();
- * }
- * </code>
- *
- * TDbConnection provides a set of methods to support setting and querying
- * of certain DBMS attributes, such as {@link getNullConversion NullConversion}.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Data
- * @since 3.0
- */
-class TDbConnection extends TComponent
-{
- /**
- *
- * @since 3.1.7
- */
- const DEFAULT_TRANSACTION_CLASS = 'System.Data.TDbTransaction';
-
- private $_dsn='';
- private $_username='';
- private $_password='';
- private $_charset='';
- private $_attributes=array();
- private $_active=false;
- private $_pdo=null;
- private $_transaction;
-
- /**
- * @var TDbMetaData
- */
- private $_dbMeta = null;
-
- /**
- * @var string
- * @since 3.1.7
- */
- private $_transactionClass=self::DEFAULT_TRANSACTION_CLASS;
-
- /**
- * Constructor.
- * Note, the DB connection is not established when this connection
- * instance is created. Set {@link setActive Active} property to true
- * to establish the connection.
- * Since 3.1.2, you can set the charset for MySql connection
- *
- * @param string The Data Source Name, or DSN, contains the information required to connect to the database.
- * @param string The user name for the DSN string.
- * @param string The password for the DSN string.
- * @param string Charset used for DB Connection (MySql & pgsql only). If not set, will use the default charset of your database server
- * @see http://www.php.net/manual/en/function.PDO-construct.php
- */
- public function __construct($dsn='',$username='',$password='', $charset='')
- {
- $this->_dsn=$dsn;
- $this->_username=$username;
- $this->_password=$password;
- $this->_charset=$charset;
- }
-
- /**
- * Close the connection when serializing.
- */
- public function __sleep()
- {
-// $this->close(); - DO NOT CLOSE the current connection as serializing doesn't neccessarily mean we don't this connection anymore in the current session
- return array_diff(parent::__sleep(),array("\0TDbConnection\0_pdo","\0TDbConnection\0_active"));
- }
-
- /**
- * @return array list of available PDO drivers
- * @see http://www.php.net/manual/en/function.PDO-getAvailableDrivers.php
- */
- public static function getAvailableDrivers()
- {
- return PDO::getAvailableDrivers();
- }
-
- /**
- * @return boolean whether the DB connection is established
- */
- public function getActive()
- {
- return $this->_active;
- }
-
- /**
- * Open or close the DB connection.
- * @param boolean whether to open or close DB connection
- * @throws TDbException if connection fails
- */
- public function setActive($value)
- {
- $value=TPropertyValue::ensureBoolean($value);
- if($value!==$this->_active)
- {
- if($value)
- $this->open();
- else
- $this->close();
- }
- }
-
- /**
- * Opens DB connection if it is currently not
- * @throws TDbException if connection fails
- */
- protected function open()
- {
- if($this->_pdo===null)
- {
- try
- {
- $this->_pdo=new PDO($this->getConnectionString(),$this->getUsername(),
+<?php +/** + * TDbConnection class file + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @link http://www.pradosoft.com/ + * @copyright Copyright © 2005-2012 PradoSoft + * @license http://www.pradosoft.com/license/ + * @version $Id$ + * @package System.Data + */ + +Prado::using('System.Data.TDbTransaction'); +Prado::using('System.Data.TDbCommand'); + +/** + * TDbConnection class + * + * TDbConnection represents a connection to a database. + * + * TDbConnection works together with {@link TDbCommand}, {@link TDbDataReader} + * and {@link TDbTransaction} to provide data access to various DBMS + * in a common set of APIs. They are a thin wrapper of the {@link http://www.php.net/manual/en/ref.pdo.php PDO} + * PHP extension. + * + * To establish a connection, set {@link setActive Active} to true after + * specifying {@link setConnectionString ConnectionString}, {@link setUsername Username} + * and {@link setPassword Password}. + * + * Since 3.1.2, the connection charset can be set (for MySQL and PostgreSQL databases only) + * using the {@link setCharset Charset} property. The value of this property is database dependant. + * e.g. for mysql, you can use 'latin1' for cp1252 West European, 'utf8' for unicode, ... + * + * The following example shows how to create a TDbConnection instance and establish + * the actual connection: + * <code> + * $connection=new TDbConnection($dsn,$username,$password); + * $connection->Active=true; + * </code> + * + * After the DB connection is established, one can execute an SQL statement like the following: + * <code> + * $command=$connection->createCommand($sqlStatement); + * $command->execute(); // a non-query SQL statement execution + * // or execute an SQL query and fetch the result set + * $reader=$command->query(); + * + * // each $row is an array representing a row of data + * foreach($reader as $row) ... + * </code> + * + * One can do prepared SQL execution and bind parameters to the prepared SQL: + * <code> + * $command=$connection->createCommand($sqlStatement); + * $command->bindParameter($name1,$value1); + * $command->bindParameter($name2,$value2); + * $command->execute(); + * </code> + * + * To use transaction, do like the following: + * <code> + * $transaction=$connection->beginTransaction(); + * try + * { + * $connection->createCommand($sql1)->execute(); + * $connection->createCommand($sql2)->execute(); + * //.... other SQL executions + * $transaction->commit(); + * } + * catch(Exception $e) + * { + * $transaction->rollBack(); + * } + * </code> + * + * TDbConnection provides a set of methods to support setting and querying + * of certain DBMS attributes, such as {@link getNullConversion NullConversion}. + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @version $Id$ + * @package System.Data + * @since 3.0 + */ +class TDbConnection extends TComponent +{ + /** + * + * @since 3.1.7 + */ + const DEFAULT_TRANSACTION_CLASS = 'System.Data.TDbTransaction'; + + private $_dsn=''; + private $_username=''; + private $_password=''; + private $_charset=''; + private $_attributes=array(); + private $_active=false; + private $_pdo=null; + private $_transaction; + + /** + * @var TDbMetaData + */ + private $_dbMeta = null; + + /** + * @var string + * @since 3.1.7 + */ + private $_transactionClass=self::DEFAULT_TRANSACTION_CLASS; + + /** + * Constructor. + * Note, the DB connection is not established when this connection + * instance is created. Set {@link setActive Active} property to true + * to establish the connection. + * Since 3.1.2, you can set the charset for MySql connection + * + * @param string The Data Source Name, or DSN, contains the information required to connect to the database. + * @param string The user name for the DSN string. + * @param string The password for the DSN string. + * @param string Charset used for DB Connection (MySql & pgsql only). If not set, will use the default charset of your database server + * @see http://www.php.net/manual/en/function.PDO-construct.php + */ + public function __construct($dsn='',$username='',$password='', $charset='') + { + $this->_dsn=$dsn; + $this->_username=$username; + $this->_password=$password; + $this->_charset=$charset; + } + + /** + * Close the connection when serializing. + */ + public function __sleep() + { +// $this->close(); - DO NOT CLOSE the current connection as serializing doesn't neccessarily mean we don't this connection anymore in the current session + return array_diff(parent::__sleep(),array("\0TDbConnection\0_pdo","\0TDbConnection\0_active")); + } + + /** + * @return array list of available PDO drivers + * @see http://www.php.net/manual/en/function.PDO-getAvailableDrivers.php + */ + public static function getAvailableDrivers() + { + return PDO::getAvailableDrivers(); + } + + /** + * @return boolean whether the DB connection is established + */ + public function getActive() + { + return $this->_active; + } + + /** + * Open or close the DB connection. + * @param boolean whether to open or close DB connection + * @throws TDbException if connection fails + */ + public function setActive($value) + { + $value=TPropertyValue::ensureBoolean($value); + if($value!==$this->_active) + { + if($value) + $this->open(); + else + $this->close(); + } + } + + /** + * Opens DB connection if it is currently not + * @throws TDbException if connection fails + */ + protected function open() + { + if($this->_pdo===null) + { + try + { + $this->_pdo=new PDO($this->getConnectionString(),$this->getUsername(), $this->getPassword(),$this->_attributes); - // This attribute is only useful for PDO::MySql driver.
+ // This attribute is only useful for PDO::MySql driver. // Ignore the warning if a driver doesn't understand this. - @$this->_pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, true);
- $this->_pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
- $this->_active=true;
- $this->setConnectionCharset();
- }
- catch(PDOException $e)
- {
- throw new TDbException('dbconnection_open_failed',$e->getMessage());
- }
- }
- }
-
- /**
- * Closes the currently active DB connection.
- * It does nothing if the connection is already closed.
- */
- protected function close()
- {
- $this->_pdo=null;
- $this->_active=false;
- }
-
- /*
- * Set the database connection charset.
- * Only MySql databases are supported for now.
- * @since 3.1.2
- */
- protected function setConnectionCharset()
- {
- if ($this->_charset === '' || $this->_active === false)
- return;
- switch ($this->_pdo->getAttribute(PDO::ATTR_DRIVER_NAME))
- {
- case 'mysql':
- case 'sqlite':
- $stmt = $this->_pdo->prepare('SET NAMES ?');
- break;
- case 'pgsql':
- $stmt = $this->_pdo->prepare('SET client_encoding TO ?');
- break;
- default:
- throw new TDbException('dbconnection_unsupported_driver_charset', $driver);
- }
- $stmt->execute(array($this->_charset));
- }
-
- /**
- * @return string The Data Source Name, or DSN, contains the information required to connect to the database.
- */
- public function getConnectionString()
- {
- return $this->_dsn;
- }
-
- /**
- * @param string The Data Source Name, or DSN, contains the information required to connect to the database.
- * @see http://www.php.net/manual/en/function.PDO-construct.php
- */
- public function setConnectionString($value)
- {
- $this->_dsn=$value;
- }
-
- /**
- * @return string the username for establishing DB connection. Defaults to empty string.
- */
- public function getUsername()
- {
- return $this->_username;
- }
-
- /**
- * @param string the username for establishing DB connection
- */
- public function setUsername($value)
- {
- $this->_username=$value;
- }
-
- /**
- * @return string the password for establishing DB connection. Defaults to empty string.
- */
- public function getPassword()
- {
- return $this->_password;
- }
-
- /**
- * @param string the password for establishing DB connection
- */
- public function setPassword($value)
- {
- $this->_password=$value;
- }
-
- /**
- * @return string the charset used for database connection. Defaults to emtpy string.
- */
- public function getCharset ()
- {
- return $this->_charset;
- }
-
- /**
- * @param string the charset used for database connection
- */
- public function setCharset ($value)
- {
- $this->_charset=$value;
- $this->setConnectionCharset();
- }
-
- /**
- * @return PDO the PDO instance, null if the connection is not established yet
- */
- public function getPdoInstance()
- {
- return $this->_pdo;
- }
-
- /**
- * Creates a command for execution.
- * @param string SQL statement associated with the new command.
- * @return TDbCommand the DB command
- * @throws TDbException if the connection is not active
- */
- public function createCommand($sql)
- {
- if($this->getActive())
- return new TDbCommand($this,$sql);
- else
- throw new TDbException('dbconnection_connection_inactive');
- }
-
- /**
- * @return TDbTransaction the currently active transaction. Null if no active transaction.
- */
- public function getCurrentTransaction()
- {
- if($this->_transaction!==null)
- {
- if($this->_transaction->getActive())
- return $this->_transaction;
- }
- return null;
- }
-
- /**
- * Starts a transaction.
- * @return TDbTransaction the transaction initiated
- * @throws TDbException if the connection is not active
- */
- public function beginTransaction()
- {
- if($this->getActive())
- {
- $this->_pdo->beginTransaction();
- return $this->_transaction=Prado::createComponent($this->getTransactionClass(), $this);
- }
- else
- throw new TDbException('dbconnection_connection_inactive');
- }
-
- /**
- * @return string Transaction class name to be created by calling {@link TDbConnection::beginTransaction}. Defaults to 'System.Data.TDbTransaction'.
- * @since 3.1.7
- */
- public function getTransactionClass()
- {
- return $this->_transactionClass;
- }
-
-
- /**
- * @param string Transaction class name to be created by calling {@link TDbConnection::beginTransaction}.
- * @since 3.1.7
- */
- public function setTransactionClass($value)
- {
- $this->_transactionClass = (string)$value;
- }
-
- /**
- * Returns the ID of the last inserted row or sequence value.
- * @param string name of the sequence object (required by some DBMS)
- * @return string the row ID of the last row inserted, or the last value retrieved from the sequence object
- * @see http://www.php.net/manual/en/function.PDO-lastInsertId.php
- */
- public function getLastInsertID($sequenceName='')
- {
- if($this->getActive())
- return $this->_pdo->lastInsertId($sequenceName);
- else
- throw new TDbException('dbconnection_connection_inactive');
- }
-
- /**
- * Quotes a string for use in a query.
- * @param string string to be quoted
- * @return string the properly quoted string
- * @see http://www.php.net/manual/en/function.PDO-quote.php
- */
- public function quoteString($str)
- {
- if($this->getActive())
- return $this->_pdo->quote($str);
- else
- throw new TDbException('dbconnection_connection_inactive');
- }
-
- /**
- * Quotes a table name for use in a query.
- * @param string $name table name
- * @return string the properly quoted table name
- */
- public function quoteTableName($name)
- {
- return $this->getDbMetaData()->quoteTableName($name);
- }
-
- /**
- * Quotes a column name for use in a query.
- * @param string $name column name
- * @return string the properly quoted column name
- */
- public function quoteColumnName($name)
- {
- return $this->getDbMetaData()->quoteColumnName($name);
- }
-
- /**
- * Quotes a column alias for use in a query.
- * @param string $name column name
- * @return string the properly quoted column alias
- */
- public function quoteColumnAlias($name)
- {
- return $this->getDbMetaData()->quoteColumnAlias($name);
- }
-
- /**
- * @return TDbMetaData
- */
- public function getDbMetaData()
- {
- if($this->_dbMeta===null)
- {
- Prado::using('System.Data.Common.TDbMetaData');
- $this->_dbMeta = TDbMetaData::getInstance($this);
- }
- return $this->_dbMeta;
- }
-
- /**
- * @return TDbColumnCaseMode the case of the column names
- */
- public function getColumnCase()
- {
- switch($this->getAttribute(PDO::ATTR_CASE))
- {
- case PDO::CASE_NATURAL:
- return TDbColumnCaseMode::Preserved;
- case PDO::CASE_LOWER:
- return TDbColumnCaseMode::LowerCase;
- case PDO::CASE_UPPER:
- return TDbColumnCaseMode::UpperCase;
- }
- }
-
- /**
- * @param TDbColumnCaseMode the case of the column names
- */
- public function setColumnCase($value)
- {
- switch(TPropertyValue::ensureEnum($value,'TDbColumnCaseMode'))
- {
- case TDbColumnCaseMode::Preserved:
- $value=PDO::CASE_NATURAL;
- break;
- case TDbColumnCaseMode::LowerCase:
- $value=PDO::CASE_LOWER;
- break;
- case TDbColumnCaseMode::UpperCase:
- $value=PDO::CASE_UPPER;
- break;
- }
- $this->setAttribute(PDO::ATTR_CASE,$value);
- }
-
- /**
- * @return TDbNullConversionMode how the null and empty strings are converted
- */
- public function getNullConversion()
- {
- switch($this->getAttribute(PDO::ATTR_ORACLE_NULLS))
- {
- case PDO::NULL_NATURAL:
- return TDbNullConversionMode::Preserved;
- case PDO::NULL_EMPTY_STRING:
- return TDbNullConversionMode::EmptyStringToNull;
- case PDO::NULL_TO_STRING:
- return TDbNullConversionMode::NullToEmptyString;
- }
- }
-
- /**
- * @param TDbNullConversionMode how the null and empty strings are converted
- */
- public function setNullConversion($value)
- {
- switch(TPropertyValue::ensureEnum($value,'TDbNullConversionMode'))
- {
- case TDbNullConversionMode::Preserved:
- $value=PDO::NULL_NATURAL;
- break;
- case TDbNullConversionMode::EmptyStringToNull:
- $value=PDO::NULL_EMPTY_STRING;
- break;
- case TDbNullConversionMode::NullToEmptyString:
- $value=PDO::NULL_TO_STRING;
- break;
- }
- $this->setAttribute(PDO::ATTR_ORACLE_NULLS,$value);
- }
-
- /**
- * @return boolean whether creating or updating a DB record will be automatically committed.
- * Some DBMS (such as sqlite) may not support this feature.
- */
- public function getAutoCommit()
- {
- return $this->getAttribute(PDO::ATTR_AUTOCOMMIT);
- }
-
- /**
- * @param boolean whether creating or updating a DB record will be automatically committed.
- * Some DBMS (such as sqlite) may not support this feature.
- */
- public function setAutoCommit($value)
- {
- $this->setAttribute(PDO::ATTR_AUTOCOMMIT,TPropertyValue::ensureBoolean($value));
- }
-
- /**
- * @return boolean whether the connection is persistent or not
- * Some DBMS (such as sqlite) may not support this feature.
- */
- public function getPersistent()
- {
- return $this->getAttribute(PDO::ATTR_PERSISTENT);
- }
-
- /**
- * @param boolean whether the connection is persistent or not
- * Some DBMS (such as sqlite) may not support this feature.
- */
- public function setPersistent($value)
- {
- return $this->setAttribute(PDO::ATTR_PERSISTENT,TPropertyValue::ensureBoolean($value));
- }
-
- /**
- * @return string name of the DB driver
- */
- public function getDriverName()
- {
- return $this->getAttribute(PDO::ATTR_DRIVER_NAME);
- }
-
- /**
- * @return string the version information of the DB driver
- */
- public function getClientVersion()
- {
- return $this->getAttribute(PDO::ATTR_CLIENT_VERSION);
- }
-
- /**
- * @return string the status of the connection
- * Some DBMS (such as sqlite) may not support this feature.
- */
- public function getConnectionStatus()
- {
- return $this->getAttribute(PDO::ATTR_CONNECTION_STATUS);
- }
-
- /**
- * @return boolean whether the connection performs data prefetching
- */
- public function getPrefetch()
- {
- return $this->getAttribute(PDO::ATTR_PREFETCH);
- }
-
- /**
- * @return string the information of DBMS server
- */
- public function getServerInfo()
- {
- return $this->getAttribute(PDO::ATTR_SERVER_INFO);
- }
-
- /**
- * @return string the version information of DBMS server
- */
- public function getServerVersion()
- {
- return $this->getAttribute(PDO::ATTR_SERVER_VERSION);
- }
-
- /**
- * @return int timeout settings for the connection
- */
- public function getTimeout()
- {
- return $this->getAttribute(PDO::ATTR_TIMEOUT);
- }
-
- /**
- * Obtains a specific DB connection attribute information.
- * @param int the attribute to be queried
- * @return mixed the corresponding attribute information
- * @see http://www.php.net/manual/en/function.PDO-getAttribute.php
- */
- public function getAttribute($name)
- {
- if($this->getActive())
- return $this->_pdo->getAttribute($name);
- else
- throw new TDbException('dbconnection_connection_inactive');
- }
-
- /**
- * Sets an attribute on the database connection.
- * @param int the attribute to be set
- * @param mixed the attribute value
- * @see http://www.php.net/manual/en/function.PDO-setAttribute.php
- */
- public function setAttribute($name,$value)
- {
- if($this->_pdo instanceof PDO)
- $this->_pdo->setAttribute($name,$value);
- else
- $this->_attributes[$name]=$value;
- }
-}
-
-/**
- * TDbColumnCaseMode
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Data
- * @since 3.0
- */
-class TDbColumnCaseMode extends TEnumerable
-{
- /**
- * Column name cases are kept as is from the database
- */
- const Preserved='Preserved';
- /**
- * Column names are converted to lower case
- */
- const LowerCase='LowerCase';
- /**
- * Column names are converted to upper case
- */
- const UpperCase='UpperCase';
-}
-
-/**
- * TDbNullConversionMode
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Data
- * @since 3.0
- */
-class TDbNullConversionMode extends TEnumerable
-{
- /**
- * No conversion is performed for null and empty values.
- */
- const Preserved='Preserved';
- /**
- * NULL is converted to empty string
- */
- const NullToEmptyString='NullToEmptyString';
- /**
- * Empty string is converted to NULL
- */
- const EmptyStringToNull='EmptyStringToNull';
-}
-
-?>
+ @$this->_pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, true); + $this->_pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); + $this->_active=true; + $this->setConnectionCharset(); + } + catch(PDOException $e) + { + throw new TDbException('dbconnection_open_failed',$e->getMessage()); + } + } + } + + /** + * Closes the currently active DB connection. + * It does nothing if the connection is already closed. + */ + protected function close() + { + $this->_pdo=null; + $this->_active=false; + } + + /* + * Set the database connection charset. + * Only MySql databases are supported for now. + * @since 3.1.2 + */ + protected function setConnectionCharset() + { + if ($this->_charset === '' || $this->_active === false) + return; + switch ($this->_pdo->getAttribute(PDO::ATTR_DRIVER_NAME)) + { + case 'mysql': + case 'sqlite': + $stmt = $this->_pdo->prepare('SET NAMES ?'); + break; + case 'pgsql': + $stmt = $this->_pdo->prepare('SET client_encoding TO ?'); + break; + default: + throw new TDbException('dbconnection_unsupported_driver_charset', $driver); + } + $stmt->execute(array($this->_charset)); + } + + /** + * @return string The Data Source Name, or DSN, contains the information required to connect to the database. + */ + public function getConnectionString() + { + return $this->_dsn; + } + + /** + * @param string The Data Source Name, or DSN, contains the information required to connect to the database. + * @see http://www.php.net/manual/en/function.PDO-construct.php + */ + public function setConnectionString($value) + { + $this->_dsn=$value; + } + + /** + * @return string the username for establishing DB connection. Defaults to empty string. + */ + public function getUsername() + { + return $this->_username; + } + + /** + * @param string the username for establishing DB connection + */ + public function setUsername($value) + { + $this->_username=$value; + } + + /** + * @return string the password for establishing DB connection. Defaults to empty string. + */ + public function getPassword() + { + return $this->_password; + } + + /** + * @param string the password for establishing DB connection + */ + public function setPassword($value) + { + $this->_password=$value; + } + + /** + * @return string the charset used for database connection. Defaults to emtpy string. + */ + public function getCharset () + { + return $this->_charset; + } + + /** + * @param string the charset used for database connection + */ + public function setCharset ($value) + { + $this->_charset=$value; + $this->setConnectionCharset(); + } + + /** + * @return PDO the PDO instance, null if the connection is not established yet + */ + public function getPdoInstance() + { + return $this->_pdo; + } + + /** + * Creates a command for execution. + * @param string SQL statement associated with the new command. + * @return TDbCommand the DB command + * @throws TDbException if the connection is not active + */ + public function createCommand($sql) + { + if($this->getActive()) + return new TDbCommand($this,$sql); + else + throw new TDbException('dbconnection_connection_inactive'); + } + + /** + * @return TDbTransaction the currently active transaction. Null if no active transaction. + */ + public function getCurrentTransaction() + { + if($this->_transaction!==null) + { + if($this->_transaction->getActive()) + return $this->_transaction; + } + return null; + } + + /** + * Starts a transaction. + * @return TDbTransaction the transaction initiated + * @throws TDbException if the connection is not active + */ + public function beginTransaction() + { + if($this->getActive()) + { + $this->_pdo->beginTransaction(); + return $this->_transaction=Prado::createComponent($this->getTransactionClass(), $this); + } + else + throw new TDbException('dbconnection_connection_inactive'); + } + + /** + * @return string Transaction class name to be created by calling {@link TDbConnection::beginTransaction}. Defaults to 'System.Data.TDbTransaction'. + * @since 3.1.7 + */ + public function getTransactionClass() + { + return $this->_transactionClass; + } + + + /** + * @param string Transaction class name to be created by calling {@link TDbConnection::beginTransaction}. + * @since 3.1.7 + */ + public function setTransactionClass($value) + { + $this->_transactionClass = (string)$value; + } + + /** + * Returns the ID of the last inserted row or sequence value. + * @param string name of the sequence object (required by some DBMS) + * @return string the row ID of the last row inserted, or the last value retrieved from the sequence object + * @see http://www.php.net/manual/en/function.PDO-lastInsertId.php + */ + public function getLastInsertID($sequenceName='') + { + if($this->getActive()) + return $this->_pdo->lastInsertId($sequenceName); + else + throw new TDbException('dbconnection_connection_inactive'); + } + + /** + * Quotes a string for use in a query. + * @param string string to be quoted + * @return string the properly quoted string + * @see http://www.php.net/manual/en/function.PDO-quote.php + */ + public function quoteString($str) + { + if($this->getActive()) + return $this->_pdo->quote($str); + else + throw new TDbException('dbconnection_connection_inactive'); + } + + /** + * Quotes a table name for use in a query. + * @param string $name table name + * @return string the properly quoted table name + */ + public function quoteTableName($name) + { + return $this->getDbMetaData()->quoteTableName($name); + } + + /** + * Quotes a column name for use in a query. + * @param string $name column name + * @return string the properly quoted column name + */ + public function quoteColumnName($name) + { + return $this->getDbMetaData()->quoteColumnName($name); + } + + /** + * Quotes a column alias for use in a query. + * @param string $name column name + * @return string the properly quoted column alias + */ + public function quoteColumnAlias($name) + { + return $this->getDbMetaData()->quoteColumnAlias($name); + } + + /** + * @return TDbMetaData + */ + public function getDbMetaData() + { + if($this->_dbMeta===null) + { + Prado::using('System.Data.Common.TDbMetaData'); + $this->_dbMeta = TDbMetaData::getInstance($this); + } + return $this->_dbMeta; + } + + /** + * @return TDbColumnCaseMode the case of the column names + */ + public function getColumnCase() + { + switch($this->getAttribute(PDO::ATTR_CASE)) + { + case PDO::CASE_NATURAL: + return TDbColumnCaseMode::Preserved; + case PDO::CASE_LOWER: + return TDbColumnCaseMode::LowerCase; + case PDO::CASE_UPPER: + return TDbColumnCaseMode::UpperCase; + } + } + + /** + * @param TDbColumnCaseMode the case of the column names + */ + public function setColumnCase($value) + { + switch(TPropertyValue::ensureEnum($value,'TDbColumnCaseMode')) + { + case TDbColumnCaseMode::Preserved: + $value=PDO::CASE_NATURAL; + break; + case TDbColumnCaseMode::LowerCase: + $value=PDO::CASE_LOWER; + break; + case TDbColumnCaseMode::UpperCase: + $value=PDO::CASE_UPPER; + break; + } + $this->setAttribute(PDO::ATTR_CASE,$value); + } + + /** + * @return TDbNullConversionMode how the null and empty strings are converted + */ + public function getNullConversion() + { + switch($this->getAttribute(PDO::ATTR_ORACLE_NULLS)) + { + case PDO::NULL_NATURAL: + return TDbNullConversionMode::Preserved; + case PDO::NULL_EMPTY_STRING: + return TDbNullConversionMode::EmptyStringToNull; + case PDO::NULL_TO_STRING: + return TDbNullConversionMode::NullToEmptyString; + } + } + + /** + * @param TDbNullConversionMode how the null and empty strings are converted + */ + public function setNullConversion($value) + { + switch(TPropertyValue::ensureEnum($value,'TDbNullConversionMode')) + { + case TDbNullConversionMode::Preserved: + $value=PDO::NULL_NATURAL; + break; + case TDbNullConversionMode::EmptyStringToNull: + $value=PDO::NULL_EMPTY_STRING; + break; + case TDbNullConversionMode::NullToEmptyString: + $value=PDO::NULL_TO_STRING; + break; + } + $this->setAttribute(PDO::ATTR_ORACLE_NULLS,$value); + } + + /** + * @return boolean whether creating or updating a DB record will be automatically committed. + * Some DBMS (such as sqlite) may not support this feature. + */ + public function getAutoCommit() + { + return $this->getAttribute(PDO::ATTR_AUTOCOMMIT); + } + + /** + * @param boolean whether creating or updating a DB record will be automatically committed. + * Some DBMS (such as sqlite) may not support this feature. + */ + public function setAutoCommit($value) + { + $this->setAttribute(PDO::ATTR_AUTOCOMMIT,TPropertyValue::ensureBoolean($value)); + } + + /** + * @return boolean whether the connection is persistent or not + * Some DBMS (such as sqlite) may not support this feature. + */ + public function getPersistent() + { + return $this->getAttribute(PDO::ATTR_PERSISTENT); + } + + /** + * @param boolean whether the connection is persistent or not + * Some DBMS (such as sqlite) may not support this feature. + */ + public function setPersistent($value) + { + return $this->setAttribute(PDO::ATTR_PERSISTENT,TPropertyValue::ensureBoolean($value)); + } + + /** + * @return string name of the DB driver + */ + public function getDriverName() + { + return $this->getAttribute(PDO::ATTR_DRIVER_NAME); + } + + /** + * @return string the version information of the DB driver + */ + public function getClientVersion() + { + return $this->getAttribute(PDO::ATTR_CLIENT_VERSION); + } + + /** + * @return string the status of the connection + * Some DBMS (such as sqlite) may not support this feature. + */ + public function getConnectionStatus() + { + return $this->getAttribute(PDO::ATTR_CONNECTION_STATUS); + } + + /** + * @return boolean whether the connection performs data prefetching + */ + public function getPrefetch() + { + return $this->getAttribute(PDO::ATTR_PREFETCH); + } + + /** + * @return string the information of DBMS server + */ + public function getServerInfo() + { + return $this->getAttribute(PDO::ATTR_SERVER_INFO); + } + + /** + * @return string the version information of DBMS server + */ + public function getServerVersion() + { + return $this->getAttribute(PDO::ATTR_SERVER_VERSION); + } + + /** + * @return int timeout settings for the connection + */ + public function getTimeout() + { + return $this->getAttribute(PDO::ATTR_TIMEOUT); + } + + /** + * Obtains a specific DB connection attribute information. + * @param int the attribute to be queried + * @return mixed the corresponding attribute information + * @see http://www.php.net/manual/en/function.PDO-getAttribute.php + */ + public function getAttribute($name) + { + if($this->getActive()) + return $this->_pdo->getAttribute($name); + else + throw new TDbException('dbconnection_connection_inactive'); + } + + /** + * Sets an attribute on the database connection. + * @param int the attribute to be set + * @param mixed the attribute value + * @see http://www.php.net/manual/en/function.PDO-setAttribute.php + */ + public function setAttribute($name,$value) + { + if($this->_pdo instanceof PDO) + $this->_pdo->setAttribute($name,$value); + else + $this->_attributes[$name]=$value; + } +} + +/** + * TDbColumnCaseMode + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @version $Id$ + * @package System.Data + * @since 3.0 + */ +class TDbColumnCaseMode extends TEnumerable +{ + /** + * Column name cases are kept as is from the database + */ + const Preserved='Preserved'; + /** + * Column names are converted to lower case + */ + const LowerCase='LowerCase'; + /** + * Column names are converted to upper case + */ + const UpperCase='UpperCase'; +} + +/** + * TDbNullConversionMode + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @version $Id$ + * @package System.Data + * @since 3.0 + */ +class TDbNullConversionMode extends TEnumerable +{ + /** + * No conversion is performed for null and empty values. + */ + const Preserved='Preserved'; + /** + * NULL is converted to empty string + */ + const NullToEmptyString='NullToEmptyString'; + /** + * Empty string is converted to NULL + */ + const EmptyStringToNull='EmptyStringToNull'; +} + +?> |