jfun.yan
Class SimpleComponent<T>

java.lang.Object
  jfun.yan.Component<T>
      jfun.yan.SimpleComponent<T>

All Implemented Interfaces:

java.io.Serializable, Creator<T>, Stateful, Typeful, Verifiable

public abstract class SimpleComponent<T>
extends Component<T>

This abstract class provides a convenient way to create Component implementations that do not have dependencies to resolve.

Author:

Ben Yu Nov 12, 2005 11:05:17 AM

See Also:

Serialized Form

Constructor Summary

SimpleComponent(java.lang.Class type)

Method Summary

abstract T	create() Subclasses can override this method to provide actual creation logic.
T	create(Dependency dep) Create a component instance.
java.lang.Class	getType() Get the type of instances that this component is responsible to create.
boolean	isConcrete() To determine if the type returned by getType() is the concrete type of the real instance.
boolean	isSingleton() Determines if the component always return the same instance and has no side-effect that causes difference when called the second time.
java.lang.String	toString()
java.lang.Class	verify(Dependency dep) Verifies that the component's dependencies are satisfiable.

Methods inherited from class jfun.yan.Component

bean, bean, bean, bind, bind, bindArgument, bindArguments, bindProperties, bindProperty, cast, factory, factory, factory, factory, factory, field, field, field, followedBy, followedBy, followedBy, fromArguments, fromProperties, getState, getter, getter, guard, ifelse, ignoreProperty, incomplete, label, label, map, method, method, method, method, method, mutate, option, optional, optionalParameter, optionalParameters, optionalProperties, optionalProperty, proxy, proxy, proxy, recover, repeat, seal, seq, setter, setter, singleton, singleton, subsume, synchronize, withArgument, withArgument, withArguments, withArguments, withDefaultArgument, withDefaultProperty, withProperties, withProperties, withProperties, withProperty, withProperty, withState

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleComponent

public SimpleComponent(java.lang.Class type)

Method Detail

getType

public java.lang.Class getType()

Description copied from class: Component

Get the type of instances that this component is responsible to create. null is returned if the type of the component cannot be determined at the time. This is typically for components that utilize late-binding strategy where the actual component type is resolved at creation time.

Specified by:

getType in interface Creator<T>

Specified by:

getType in interface Typeful

Specified by:

getType in class Component<T>

Returns:

the type of the component.

isConcrete

public boolean isConcrete()

Description copied from interface: Creator

To determine if the type returned by getType() is the concrete type of the real instance.

A strict static type check will be performed on concrete types.

create

public T create(Dependency dep)

Description copied from interface: Creator

Create a component instance.

Parameters:

dep - the provider that provides all dependent data.

Returns:

the component instance.

verify

public java.lang.Class verify(Dependency dep)

Description copied from interface: Verifiable

Verifies that the component's dependencies are satisfiable.

Parameters:

dep - the provider that provides all dependent information.

create

public abstract T create()
                  throws java.lang.Throwable

Subclasses can override this method to provide actual creation logic.

Returns:

the component instance.

Throws:

java.lang.Throwable - any error can be thrown out of here.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

isSingleton

public boolean isSingleton()

Description copied from interface: Creator

Determines if the component always return the same instance and has no side-effect that causes difference when called the second time.

This information may be useful to certain optimizations.

Returns:

true if it always return the same instance. False if not singleton or non-determinable.