org.picocontainer
Interface MutablePicoContainer

All Superinterfaces:

Disposable, PicoContainer, Startable

All Known Subinterfaces:

ClassLoadingPicoContainer

All Known Implementing Classes:

AbstractDelegatingMutablePicoContainer, DefaultClassLoadingPicoContainer, DefaultPicoContainer, TieringPicoContainer, TransientPicoContainer

public interface MutablePicoContainer
extends PicoContainer, Startable, Disposable

This is the core interface used for registration of components with a container. It is possible to register implementations and instances here

Author:

Paul Hammant, Aslak Hellesøy, Jon Tirsén

See Also:

See package description for basic overview how to use PicoContainer.

Method Summary

MutablePicoContainer	addAdapter(ComponentAdapter<?> componentAdapter) Register a component via a ComponentAdapter.
MutablePicoContainer	addChildContainer(PicoContainer child) Add a child container.
MutablePicoContainer	addComponent(Object implOrInstance) Register an arbitrary object.
MutablePicoContainer	addComponent(Object componentKey, Object componentImplementationOrInstance, Parameter... parameters) Register a component and creates specific instructions on which constructor to use, along with which components and/or constants to provide as constructor arguments.
MutablePicoContainer	addConfig(String name, Object val) Register a config item.
MutablePicoContainer	as(Properties... properties) You can set for the following operation only the characteristic of registration of a component on the fly.
MutablePicoContainer	change(Properties... properties) You can change the characteristic of registration of all subsequent components in this container.
MutablePicoContainer	makeChildContainer() Make a child container, using the same implementation of MutablePicoContainer as the parent.
boolean	removeChildContainer(PicoContainer child) Remove a child container from this container.
<T> ComponentAdapter<T>	removeComponent(Object componentKey) Unregister a component by key.
<T> ComponentAdapter<T>	removeComponentByInstance(T componentInstance) Unregister a component by instance.
void	setLifecycleState(LifecycleState lifecycleState) To assist ThreadLocal usage, LifecycleState can be set.
void	setName(String name) Name the container instance, to assit debugging.

Methods inherited from interface org.picocontainer.PicoContainer

accept, getComponent, getComponent, getComponent, getComponent, getComponentAdapter, getComponentAdapter, getComponentAdapter, getComponentAdapters, getComponentAdapters, getComponentAdapters, getComponents, getComponents, getParent

Methods inherited from interface org.picocontainer.Startable

start, stop

Methods inherited from interface org.picocontainer.Disposable

dispose

Method Detail

addComponent

MutablePicoContainer addComponent(Object componentKey,
                                  Object componentImplementationOrInstance,
                                  Parameter... parameters)

Register a component and creates specific instructions on which constructor to use, along with which components and/or constants to provide as constructor arguments. These "directives" are provided through an array of Parameter objects. Parameter[0] correspondes to the first constructor argument, Parameter[N] corresponds to the N+1th constructor argument.

Tips for Parameter usage

• Partial Autowiring: If you have two constructor args to match and you only wish to specify one of the constructors and let PicoContainer wire the other one, you can use as parameters: new ComponentParameter(), new ComponentParameter("someService") The default constructor for the component parameter indicates auto-wiring should take place for that parameter.
• Force No-Arg constructor usage: If you wish to force a component to be constructed with the no-arg constructor, use a zero length Parameter array. Ex: new Parameter[0]

  Parameters:

  componentKey - a key that identifies the component. Must be unique within the container. The type of the key object has no semantic significance unless explicitly specified in the documentation of the implementing container.

  componentImplementationOrInstance - the component's implementation class. This must be a concrete class (ie, a class that can be instantiated). Or an intance of the compoent.

  parameters - the parameters that gives the container hints about what arguments to pass to the constructor when it is instantiated. Container implementations may ignore one or more of these hints.

  Returns:

  the same instance of MutablePicoContainer

  Throws:

  PicoCompositionException - if registration of the component fails.

  See Also:

  Parameter, ConstantParameter, ComponentParameter

addComponent

MutablePicoContainer addComponent(Object implOrInstance)

Register an arbitrary object. The class of the object will be used as a key. Calling this method is equivalent to calling addComponent(componentImplementation, componentImplementation).

Parameters:

implOrInstance - Component implementation or instance

Returns:

the same instance of MutablePicoContainer

Throws:

PicoCompositionException - if registration fails.

addConfig

MutablePicoContainer addConfig(String name,
                               Object val)

Register a config item.

Parameters:

name - the name of the config item

val - the value of the config item

Returns:

the same instance of MutablePicoContainer

Throws:

PicoCompositionException - if registration fails.

addAdapter

MutablePicoContainer addAdapter(ComponentAdapter<?> componentAdapter)

Register a component via a ComponentAdapter. Use this if you need fine grained control over what ComponentAdapter to use for a specific component. The adapter will be wrapped in whatever behaviors that the the container has been set up with. If you want to bypass that behavior for the adapter you are adding, you should use Characteristics.NONE like so pico.as(Characteristics.NONE).addAdapter(...)

Parameters:

componentAdapter - the adapter

Returns:

the same instance of MutablePicoContainer

Throws:

PicoCompositionException - if registration fails.

removeComponent

<T> ComponentAdapter<T> removeComponent(Object componentKey)

Unregister a component by key.

Parameters:

componentKey - key of the component to unregister.

Returns:

the ComponentAdapter that was associated with this component.

removeComponentByInstance

<T> ComponentAdapter<T> removeComponentByInstance(T componentInstance)

Unregister a component by instance.

Parameters:

componentInstance - the component instance to unregister.

Returns:

the same instance of MutablePicoContainer

makeChildContainer

MutablePicoContainer makeChildContainer()

Make a child container, using the same implementation of MutablePicoContainer as the parent. It will have a reference to this as parent. This will list the resulting MPC as a child. Lifecycle events will be cascaded from parent to child as a consequence of this.

Returns:

the new child container.

addChildContainer

MutablePicoContainer addChildContainer(PicoContainer child)

Add a child container. This action will list the the 'child' as exactly that in the parents scope. It will not change the child's view of a parent. That is determined by the constructor arguments of the child itself. Lifecycle events will be cascaded from parent to child as a consequence of calling this method.

Parameters:

child - the child container

Returns:

the same instance of MutablePicoContainer

removeChildContainer

boolean removeChildContainer(PicoContainer child)

Remove a child container from this container. It will not change the child's view of a parent. Lifecycle event will no longer be cascaded from the parent to the child.

Parameters:

child - the child container

Returns:

true if the child container has been removed.

change

MutablePicoContainer change(Properties... properties)

You can change the characteristic of registration of all subsequent components in this container.

Parameters:

properties -

Returns:

the same Pico instance with changed properties

as

MutablePicoContainer as(Properties... properties)

You can set for the following operation only the characteristic of registration of a component on the fly.

Parameters:

properties -

Returns:

the same Pico instance with temporary properties

setName

void setName(String name)

Name the container instance, to assit debugging.

Parameters:

name - the name to call it.

Since:

2.8

setLifecycleState

void setLifecycleState(LifecycleState lifecycleState)

To assist ThreadLocal usage, LifecycleState can be set. No need to use this for normal usages.

Parameters:

lifecycleState - the lifecyle state to use.

Since:

2.8