public class EmbeddedDriver extends Object implements Driver
The driver automatically supports the correct JDBC specification version for the Java Virtual Machine's environment.
Loading this JDBC driver boots the database engine within the same Java virtual machine.
The correct code to load the Derby engine using this driver is (with approriate try/catch blocks):
Class.forName("org.apache.derby.jdbc.EmbeddedDriver").newInstance(); // or new org.apache.derby.jdbc.EmbeddedDriver();When loaded in this way, the class boots the actual JDBC driver indirectly. The JDBC specification recommends the Class.ForName method without the .newInstance() method call, but adding the newInstance() guarantees that Derby will be booted on any Java Virtual Machine.
Note that you do not need to manually load the driver this way if you are running on Jave SE 6 or later. In that environment, the driver will be automatically loaded for you when your application requests a connection to a Derby database.
Any initial error messages are placed in the PrintStream supplied by the DriverManager. If the PrintStream is null error messages are sent to System.err. Once the Derby engine has set up an error logging facility (by default to derby.log) all subsequent messages are sent to it.
By convention, the class used in the Class.forName() method to boot a JDBC driver implements java.sql.Driver. This class is not the actual JDBC driver that gets registered with the Driver Manager. It proxies requests to the registered Derby JDBC driver.
DriverManager
,
DriverManager.getLogStream()
,
Driver
,
SQLException
Constructor and Description |
---|
EmbeddedDriver() |
Modifier and Type | Method and Description |
---|---|
boolean |
acceptsURL(String url)
Accept anything that starts with
jdbc:derby: . |
Connection |
connect(String url,
Properties info)
Connect to the URL if possible
|
int |
getMajorVersion()
Returns the driver's major version number.
|
int |
getMinorVersion()
Returns the driver's minor version number.
|
Logger |
getParentLogger() |
DriverPropertyInfo[] |
getPropertyInfo(String url,
Properties info)
Returns an array of DriverPropertyInfo objects describing possible properties.
|
boolean |
jdbcCompliant()
Report whether the Driver is a genuine JDBC COMPLIANT (tm) driver.
|
public boolean acceptsURL(String url) throws SQLException
jdbc:derby:
.acceptsURL
in interface Driver
SQLException
- if a database-access error occurs.Driver
public Connection connect(String url, Properties info) throws SQLException
connect
in interface Driver
SQLException
- illegal url or problem with connectiongDriver
public DriverPropertyInfo[] getPropertyInfo(String url, Properties info) throws SQLException
getPropertyInfo
in interface Driver
SQLException
- if a database-access error occurs.Driver
public int getMajorVersion()
getMajorVersion
in interface Driver
Driver
public int getMinorVersion()
getMinorVersion
in interface Driver
Driver
public boolean jdbcCompliant()
jdbcCompliant
in interface Driver
Driver
public Logger getParentLogger() throws SQLFeatureNotSupportedException
getParentLogger
in interface Driver
SQLFeatureNotSupportedException
Apache Derby 10.13 API Documentation - Copyright © 2004,2016 The Apache Software Foundation. All Rights Reserved.