ru.yandex.clickhouse.jdbcbridge.core

Class Extension<T>

java.lang.Object

ru.yandex.clickhouse.jdbcbridge.core.Extension<T>

public final class Extension<T>
extends Object

This class defines an extension of JDBC bridge. Basically it's composed of 3 pieces: 1) name; 2) method for initialization; and 3) method for instantiation.

Since:

2.0

Constructor Summary

Constructors

Constructor and Description
Extension(Class<? extends T> clazz)
Extension(String name, Class<? extends T> clazz)

Method Summary

Modifier and Type	Method and Description
String	getName() Get name of the extension.
Class<? extends T>	getProviderClass() Get class of the extension.
void	initialize(ExtensionManager manager) Initialize the extension.
Class<?>	loadClass(String className) Load a specific class.
T	newInstance(Object... args) Create a new instance of the extension.

Methods inherited from class java.lang.Object

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

Constructor Detail

Extension

public Extension(Class<? extends T> clazz)

Extension

public Extension(String name,
                 Class<? extends T> clazz)

Method Detail

getName

public String getName()

Get name of the extension. It's either from EXTENSION_NAME(static member of the extension class) or simple name of the class.

Returns:

name of the extension

getProviderClass

public Class<? extends T> getProviderClass()

Get class of the extension. Note that this is different from Object.getClass().

Returns:

class of the extension

loadClass

public Class<?> loadClass(String className)

Load a specific class.

Parameters:

className - class name

Returns:

desired class

initialize

public void initialize(ExtensionManager manager)

Initialize the extension. This will be only called once at startup of the application.

Parameters:

manager - extension manager

newInstance

public T newInstance(Object... args)

Create a new instance of the extension.

Parameters:

args - list of arguments for instantiation

Returns:

new instance of the extension

Throws:

UnsupportedOperationException - if no static newInstance method and suitable constructor for instantiation

IllegalArgumentException - if failed to create new instance using given arguments