com.cafesoft.core.jdbc
Class PoolingConnectionDriver

java.lang.Object
  |
  +--com.cafesoft.core.jdbc.PoolingConnectionDriver

All Implemented Interfaces:

Driver

public class PoolingConnectionDriver

extends Object

implements Driver

An implementation of the Driver interface that provides pooling of Connection Objects

Since:

11/1/02

See Also:

Connection, Driver

Field Summary

protected static int	MAJOR_VERSION The Driver's major version number
protected static int	MINOR_VERSION The Driver's minor version number
protected static String	URL_PREFIX The url prefix that this driver will accept
protected static int	URL_PREFIX_LEN The length of the URL_PREFIX variable

Constructor Summary

PoolingConnectionDriver()
Create a new PoolingConnectionDriver

Method Summary

boolean	acceptsURL(String url) Retrieves whether the driver thinks that it can open a connection to the given URL.
Connection	connect(String url, Properties info) Attempts to make a database connection to the given URL.
int	getMajorVersion() Retrieves the driver's major version number.
int	getMinorVersion() Gets the driver's minor version number.
DriverPropertyInfo[]	getPropertyInfo(String url, Properties info) Gets information about the possible properties for this driver.
boolean	jdbcCompliant() Reports whether this driver is a genuine JDBC CompliantTM driver.

Methods inherited from class java.lang.Object

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

Field Detail

MAJOR_VERSION

protected static int MAJOR_VERSION

The Driver's major version number

MINOR_VERSION

protected static int MINOR_VERSION

The Driver's minor version number

URL_PREFIX

protected static String URL_PREFIX

The url prefix that this driver will accept

URL_PREFIX_LEN

protected static int URL_PREFIX_LEN

The length of the URL_PREFIX variable

Constructor Detail

PoolingConnectionDriver

public PoolingConnectionDriver()

Create a new PoolingConnectionDriver

Method Detail

acceptsURL

public boolean acceptsURL(String url)
                   throws SQLException

Retrieves whether the driver thinks that it can open a connection to the given URL. Typically drivers will return true if they understand the subprotocol specified in the URL and false if they do not.

Specified by:

acceptsURL in interface Driver

Parameters:

url - the URL of the database

Returns:

true if this driver understands the given URL; false otherwise

Throws:

SQLException - if a database access error occurs

connect

public Connection connect(String url,
                          Properties info)
                   throws SQLException

Attempts to make a database connection to the given URL. The driver should return "null" if it realizes it is the wrong kind of driver to connect to the given URL. This will be common, as when the JDBC driver manager is asked to connect to a given URL it passes the URL to each loaded driver in turn.

The driver should throw an SQLException if it is the right driver to connect to the given URL but has trouble connecting to the database.

The java.util.Properties argument can be used to pass arbitrary string tag/value pairs as connection arguments. Normally at least "user" and "password" properties should be included in the Properties object.

Specified by:

connect in interface Driver

Parameters:

url - the URL of the database to which to connect

info - a list of arbitrary string tag/value pairs as connection arguments. Normally at least a "user" and "password" property should be included.

Returns:

a Connection object that represents a connection to the URL

Throws:

SQLException - if a database access error occurs

jdbcCompliant

public boolean jdbcCompliant()

Reports whether this driver is a genuine JDBC Compliant^TM driver. A driver may only report true here if it passes the JDBC compliance tests; otherwise it is required to return false.

JDBC compliance requires full support for the JDBC API and full support for SQL 92 Entry Level. It is expected that JDBC compliant drivers will be available for all the major commercial databases.

This method is not intended to encourage the development of non-JDBC compliant drivers, but is a recognition of the fact that some vendors are interested in using the JDBC API and framework for lightweight databases that do not support full database functionality, or for special databases such as document information retrieval where a SQL implementation may not be feasible.

Specified by:

jdbcCompliant in interface Driver

Returns:

true if this driver is JDBC Compliant; false otherwise

getMajorVersion

public int getMajorVersion()

Retrieves the driver's major version number. Initially this should be 1.

Specified by:

getMajorVersion in interface Driver

Returns:

this driver's major version number

getMinorVersion

public int getMinorVersion()

Gets the driver's minor version number. Initially this should be 0.

Specified by:

getMinorVersion in interface Driver

Returns:

this driver's minor version number

getPropertyInfo

public DriverPropertyInfo[] getPropertyInfo(String url,
                                            Properties info)
                                     throws SQLException

Gets information about the possible properties for this driver.

The getPropertyInfo method is intended to allow a generic GUI tool to discover what properties it should prompt a human for in order to get enough information to connect to a database. Note that depending on the values the human has supplied so far, additional values may become necessary, so it may be necessary to iterate though several calls to the getPropertyInfo method.

Specified by:

getPropertyInfo in interface Driver

Parameters:

url - the URL of the database to which to connect

info - a proposed list of tag/value pairs that will be sent on connect open

Returns:

an array of DriverPropertyInfo objects describing possible properties. This array may be an empty array if no properties are required.

Throws:

SQLException - if a database access error occurs