org.h2.util

Class JdbcUtils

java.lang.Object

org.h2.util.JdbcUtils

public class JdbcUtils
extends java.lang.Object

This is a utility class with JDBC helper functions.

Field Summary

Fields

Modifier and Type	Field and Description
static CustomDataTypesHandler	customDataTypesHandler Custom data types handler to use.
static JavaObjectSerializer	serializer The serializer to use.

Method Summary

Modifier and Type	Method and Description
static void	addClassFactory(Utils.ClassFactory classFactory) Add a class factory in order to manage more than one class loader.
static void	closeSilently(java.sql.Connection conn) Close a connection without throwing an exception.
static void	closeSilently(java.sql.ResultSet rs) Close a result set without throwing an exception.
static void	closeSilently(java.sql.Statement stat) Close a statement without throwing an exception.
static java.lang.Object	deserialize(byte[] data, DataHandler dataHandler) De-serialize the byte array to an object, eventually using the serializer specified by the connection info.
static java.sql.Connection	getConnection(java.lang.String driver, java.lang.String url, java.util.Properties prop) Open a new database connection with the given settings.
static java.sql.Connection	getConnection(java.lang.String driver, java.lang.String url, java.lang.String user, java.lang.String password) Open a new database connection with the given settings.
static java.lang.String	getDriver(java.lang.String url) Get the driver class name for the given URL, or null if the URL is unknown.
static void	load(java.lang.String url) Load the driver class for the given URL, if the database URL is known.
static <Z> java.lang.Class<Z>	loadUserClass(java.lang.String className) Load a class, but check if it is allowed to load this class first.
static void	removeClassFactory(Utils.ClassFactory classFactory) Remove a class factory
static byte[]	serialize(java.lang.Object obj, DataHandler dataHandler) Serialize the object to a byte array, using the serializer specified by the connection info if set, or the default serializer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

serializer

public static JavaObjectSerializer serializer

The serializer to use.

customDataTypesHandler

public static CustomDataTypesHandler customDataTypesHandler

Custom data types handler to use.

Method Detail

addClassFactory

public static void addClassFactory(Utils.ClassFactory classFactory)

Add a class factory in order to manage more than one class loader.

Parameters:

classFactory - An object that implements ClassFactory

removeClassFactory

public static void removeClassFactory(Utils.ClassFactory classFactory)

Remove a class factory

Parameters:

classFactory - Already inserted class factory instance

loadUserClass

public static <Z> java.lang.Class<Z> loadUserClass(java.lang.String className)

Load a class, but check if it is allowed to load this class first. To perform access rights checking, the system property h2.allowedClasses needs to be set to a list of class file name prefixes.

Parameters:

className - the name of the class

Returns:

the class object

closeSilently

public static void closeSilently(java.sql.Statement stat)

Close a statement without throwing an exception.

Parameters:

stat - the statement or null

closeSilently

public static void closeSilently(java.sql.Connection conn)

Close a connection without throwing an exception.

Parameters:

conn - the connection or null

closeSilently

public static void closeSilently(java.sql.ResultSet rs)

Close a result set without throwing an exception.

Parameters:

rs - the result set or null

getConnection

public static java.sql.Connection getConnection(java.lang.String driver,
                                                java.lang.String url,
                                                java.lang.String user,
                                                java.lang.String password)
                                         throws java.sql.SQLException

Open a new database connection with the given settings.

Parameters:

driver - the driver class name

url - the database URL

user - the user name

password - the password

Returns:

the database connection

Throws:

java.sql.SQLException

getConnection

public static java.sql.Connection getConnection(java.lang.String driver,
                                                java.lang.String url,
                                                java.util.Properties prop)
                                         throws java.sql.SQLException

Open a new database connection with the given settings.

Parameters:

driver - the driver class name

url - the database URL

prop - the properties containing at least the user name and password

Returns:

the database connection

Throws:

java.sql.SQLException

getDriver

public static java.lang.String getDriver(java.lang.String url)

Get the driver class name for the given URL, or null if the URL is unknown.

Parameters:

url - the database URL

Returns:

the driver class name

load

public static void load(java.lang.String url)

Load the driver class for the given URL, if the database URL is known.

Parameters:

url - the database URL

serialize

public static byte[] serialize(java.lang.Object obj,
                               DataHandler dataHandler)

Serialize the object to a byte array, using the serializer specified by the connection info if set, or the default serializer.

Parameters:

obj - the object to serialize

dataHandler - provides the object serializer (may be null)

Returns:

the byte array

deserialize

public static java.lang.Object deserialize(byte[] data,
                                           DataHandler dataHandler)

De-serialize the byte array to an object, eventually using the serializer specified by the connection info.

Parameters:

data - the byte array

dataHandler - provides the object serializer (may be null)

Returns:

the object

Throws:

DbException - if serialization fails