org.apache.calcite.avatica

Class UnregisteredDriver

java.lang.Object

org.apache.calcite.avatica.UnregisteredDriver

All Implemented Interfaces:

Driver

Direct Known Subclasses:

Driver

public abstract class UnregisteredDriver
extends Object
implements Driver

Implementation of JDBC driver that does not register itself.

You can easily create a "vanity driver" that recognizes its own URL prefix as a sub-class of this class. Per the JDBC specification it must register itself when the class is loaded.

Derived classes must implement createDriverVersion() and getConnectStringPrefix(), and may override createFactory().

The provider must implement:

• Meta.prepare(Meta.ConnectionHandle, String, long)
• Meta.createIterable(org.apache.calcite.avatica.Meta.StatementHandle, org.apache.calcite.avatica.QueryState, org.apache.calcite.avatica.Meta.Signature, java.util.List, Meta.Frame)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	UnregisteredDriver.JdbcVersion JDBC version.

Field Summary

Fields

Modifier and Type	Field and Description
protected AvaticaFactory	factory
Handler	handler

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	UnregisteredDriver()

Method Summary

Modifier and Type	Method and Description
boolean	acceptsURL(String url)
Connection	connect(String url, Properties info)
protected abstract DriverVersion	createDriverVersion() Creates an object describing the name and version of this driver.
protected AvaticaFactory	createFactory() Creates a factory for JDBC objects (connection, statement).
protected Handler	createHandler() Creates a Handler.
abstract Meta	createMeta(AvaticaConnection connection) Creates a service handler that will give connections from this Driver their behavior.
protected Collection<ConnectionProperty>	getConnectionProperties() Returns the connection properties supported by this driver.
protected abstract String	getConnectStringPrefix() Returns the prefix of the connect string that this driver will recognize as its own.
DriverVersion	getDriverVersion() Returns the driver version object.
protected String	getFactoryClassName(UnregisteredDriver.JdbcVersion jdbcVersion) Returns the name of a class to be factory for JDBC objects (connection, statement) appropriate for the current JDBC version.
int	getMajorVersion()
int	getMinorVersion()
Logger	getParentLogger()
DriverPropertyInfo[]	getPropertyInfo(String url, Properties info)
protected static AvaticaFactory	instantiateFactory(String factoryClassName) Helper method for creating factories.
boolean	jdbcCompliant()
protected void	register() Registers this driver with the driver manager.

Methods inherited from class java.lang.Object

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

Field Detail

factory

protected final AvaticaFactory factory

handler

public final Handler handler

Constructor Detail

UnregisteredDriver

protected UnregisteredDriver()

Method Detail

createFactory

protected AvaticaFactory createFactory()

Creates a factory for JDBC objects (connection, statement). Called from the driver constructor.

The default implementation calls UnregisteredDriver.JdbcVersion.current(), then getFactoryClassName(org.apache.calcite.avatica.UnregisteredDriver.JdbcVersion) with that version, then passes that class name to instantiateFactory(String). This approach is recommended it does not include in the code references to classes that may not be instantiable in all JDK versions. But drivers are free to do it their own way.

Returns:

JDBC object factory

createHandler

protected Handler createHandler()

Creates a Handler.

getFactoryClassName

protected String getFactoryClassName(UnregisteredDriver.JdbcVersion jdbcVersion)

Returns the name of a class to be factory for JDBC objects (connection, statement) appropriate for the current JDBC version.

createDriverVersion

protected abstract DriverVersion createDriverVersion()

Creates an object describing the name and version of this driver. Called from the driver constructor.

getConnectionProperties

protected Collection<ConnectionProperty> getConnectionProperties()

Returns the connection properties supported by this driver.

instantiateFactory

protected static AvaticaFactory instantiateFactory(String factoryClassName)

Helper method for creating factories.

connect

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

Specified by:

connect in interface Driver

Throws:

SQLException

acceptsURL

public boolean acceptsURL(String url)
                   throws SQLException

Specified by:

acceptsURL in interface Driver

Throws:

SQLException

getConnectStringPrefix

protected abstract String getConnectStringPrefix()

Returns the prefix of the connect string that this driver will recognize as its own. For example, "jdbc:calcite:".

getPropertyInfo

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

Specified by:

getPropertyInfo in interface Driver

Throws:

SQLException

getParentLogger

public Logger getParentLogger()

Specified by:

getParentLogger in interface Driver

getDriverVersion

public DriverVersion getDriverVersion()

Returns the driver version object. Not in the JDBC API.

Returns:

Driver version

getMajorVersion

public final int getMajorVersion()

Specified by:

getMajorVersion in interface Driver

getMinorVersion

public final int getMinorVersion()

Specified by:

getMinorVersion in interface Driver

jdbcCompliant

public boolean jdbcCompliant()

Specified by:

jdbcCompliant in interface Driver

register

protected void register()

Registers this driver with the driver manager.

createMeta

public abstract Meta createMeta(AvaticaConnection connection)

Creates a service handler that will give connections from this Driver their behavior.