co.codewizards.cloudstore.core.objectfactory

Class AbstractClassExtension<T,E extends T>

java.lang.Object

co.codewizards.cloudstore.core.objectfactory.AbstractClassExtension<T,E>

Type Parameters:

T - the type of the base-class. Automatically assigned to the property baseClass.

E - the type of the extending class. Automatically assigned to the property extendingClass.

All Implemented Interfaces:

ClassExtension<T>

public abstract class AbstractClassExtension<T,E extends T>
extends Object
implements ClassExtension<T>

Abstract base-class for the much easier implementation of a ClassExtension.

It is highly recommended not to implement the interface ClassExtension directly. Instead, implementors should always extend this abstract base-class.

In most cases, an implementation of a ClassExtension looks simply like this example:

  public class SsSymlinkClassExtension extends AbstractClassExtension<Symlink, SsSymlink> {
  }
 

It is recommended to use the naming scheme "${extendingClassName}" + "ClassExtension" as shown in the example above.

Author:

Marco หงุ่ยตระกูล-Schulze - marco at codewizards dot co

Constructor Summary

Constructors

Constructor and Description
AbstractClassExtension()

Method Summary

Modifier and Type	Method and Description
Class<T>	getBaseClass() Gets the base-class to be extended by instantiating a sub-class instead.
Class<E>	getExtendingClass() Gets the sub-class extending the baseClass to be instantiated whenever a new instance of the base-class is requested.
int	getPriority() Gets the priority of this extension.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractClassExtension

public AbstractClassExtension()

Method Detail

getPriority

public int getPriority()

Gets the priority of this extension.

If there are multiple ClassExtension-implementations for the same baseClass, the extension with the highest priority (i.e the greatest number returned here) is chosen.

The default implementation in AbstractClassExtension returns 0. Override and return either a negative value, if you want to provide a fallback-implementation (that is likely to be replaced by a different ClassExtension) or a positive value in order to override another ClassExtension (make sure your priority is greater than the other extension's priority).

Specified by:

getPriority in interface ClassExtension<T>

Returns:

the priority of this extension. Might be negative, 0 or positive.

getBaseClass

public Class<T> getBaseClass()

Description copied from interface: ClassExtension

Gets the base-class to be extended by instantiating a sub-class instead.

Specified by:

getBaseClass in interface ClassExtension<T>

Returns:

the base-class to be replaced in all instantiations. Never null.

getExtendingClass

public Class<E> getExtendingClass()

Description copied from interface: ClassExtension

Gets the sub-class extending the baseClass to be instantiated whenever a new instance of the base-class is requested.

Specified by:

getExtendingClass in interface ClassExtension<T>

Returns:

the sub-class to be instantiated instead of the baseClass. Never null.