Package org.picocontainer.behaviors
Class AbstractBehavior<T>
java.lang.Object
org.picocontainer.behaviors.AbstractBehavior<T>
- All Implemented Interfaces:
Serializable
,Behavior<T>
,ComponentAdapter<T>
,ComponentLifecycle<T>
,ComponentMonitorStrategy
,LifecycleStrategy
- Direct Known Subclasses:
Automated
,Decorated
,FieldDecorated
,Guarded
,HiddenImplementation
,Locked
,PropertyApplicator
,Stored
,Synchronized
public abstract class AbstractBehavior<T>
extends Object
implements Behavior<T>, ComponentMonitorStrategy, LifecycleStrategy, Serializable
Component adapter which decorates another adapter.
This adapter supports a component monitor strategy
and will propagate change of monitor to the delegate if the delegate itself
support the monitor strategy.
This adapter also supports a lifecycle manager
and a
lifecycle strategy
if the delegate does.
- Author:
- Jon Tirsen, Aslak Hellesoy, Mauro Talevi
- See Also:
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Nested Class Summary
Nested classes/interfaces inherited from interface org.picocontainer.ComponentAdapter
ComponentAdapter.NOTHING
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
accept
(PicoVisitor visitor) Accepts a visitor for this ComponentAdapter.void
changeMonitor
(ComponentMonitor monitor) Delegates change of monitor if the delegate supports a component monitor strategy.boolean
Invokes delegate hasLifecycle method if the delegate is a Behavior Test if a component honors a lifecycle.Returns delegate's current monitor if the delegate supports a component monitor strategy.void
Invokes delegate dispose method if the delegate is a LifecycleStrategy Invoke the "dispose" method on the component instance if this is disposable.void
dispose
(PicoContainer container) Invokes delegate dispose method if the delegate is a Behavior Invoke the "dispose" method on the component.final <U extends ComponentAdapter>
UfindAdapterOfType
(Class<U> adapterType) Locates a component adapter of type componentAdapterType in the ComponentAdapter chain.Retrieve the class of the component.getComponentInstance
(PicoContainer container) Retrieve the component instance.getComponentInstance
(PicoContainer container, Type into) Retrieve the component instance.Retrieve the key associated with the component.final ComponentAdapter<T>
Component adapters may be nested in a chain, and this method is used to grab the next ComponentAdapter in the chain.boolean
hasLifecycle
(Class<?> type) Invokes delegate hasLifecycle(Class) method if the delegate is a LifecycleStrategy Test if a component instance has a lifecycle.boolean
isLazy
(ComponentAdapter<?> adapter) Is a component eager (not lazy) in that it should start when start() or equivalent is called, or lazy (it will only start on first getComponent() ).boolean
void
Invokes delegate start method if the delegate is a LifecycleStrategy Invoke the "start" method on the component instance if this is startable.void
start
(PicoContainer container) Invokes delegate start method if the delegate is a Behavior Invoke the "start" method on the component.void
Invokes delegate stop method if the delegate is a LifecycleStrategy Invoke the "stop" method on the component instance if this is stoppable.void
stop
(PicoContainer container) Invokes delegate stop method if the delegate is a Behavior Invoke the "stop" method on the component.toString()
void
verify
(PicoContainer container) Verify that all dependencies for this adapter can be satisfied.Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Methods inherited from interface org.picocontainer.ComponentAdapter
getDescriptor
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Field Details
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delegate
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Constructor Details
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AbstractBehavior
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Method Details
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getComponentKey
Description copied from interface:ComponentAdapter
Retrieve the key associated with the component.- Specified by:
getComponentKey
in interfaceComponentAdapter<T>
- Returns:
- the component's key. Should either be a class type (normally an interface) or an identifier that is unique (within the scope of the current PicoContainer).
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getComponentImplementation
Description copied from interface:ComponentAdapter
Retrieve the class of the component.- Specified by:
getComponentImplementation
in interfaceComponentAdapter<T>
- Returns:
- the component's implementation class. Should normally be a concrete class (ie, a class that can be instantiated).
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getComponentInstance
Description copied from interface:ComponentAdapter
Retrieve the component instance. This method will usually create a new instance each time it is called, but that is not required. For example,Cached
will always return the same instance.- Specified by:
getComponentInstance
in interfaceComponentAdapter<T>
- Parameters:
container
- thePicoContainer
, that is used to resolve any possible dependencies of the instance.- Returns:
- the component instance.
- Throws:
PicoCompositionException
- if the component has dependencies which could not be resolved, or instantiation of the component lead to an ambigous situation within the container.
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getComponentInstance
Description copied from interface:ComponentAdapter
Retrieve the component instance. This method will usually create a new instance each time it is called, but that is not required. For example,Cached
will always return the same instance.- Specified by:
getComponentInstance
in interfaceComponentAdapter<T>
- Parameters:
container
- thePicoContainer
, that is used to resolve any possible dependencies of the instance.into
- the class that is about to be injected into. Use ComponentAdapter.NOTHING.class if this is not important to you.- Returns:
- the component instance.
- Throws:
PicoCompositionException
- if the component has dependencies which could not be resolved, or instantiation of the component lead to an ambiguous situation within the container.
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verify
Description copied from interface:ComponentAdapter
Verify that all dependencies for this adapter can be satisfied. Normally, the adapter should verify this by checking that the associated PicoContainer contains all the needed dependencies.- Specified by:
verify
in interfaceComponentAdapter<T>
- Parameters:
container
- thePicoContainer
, that is used to resolve any possible dependencies of the instance.- Throws:
PicoCompositionException
- if one or more dependencies cannot be resolved.
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getDelegate
Description copied from interface:ComponentAdapter
Component adapters may be nested in a chain, and this method is used to grab the next ComponentAdapter in the chain.- Specified by:
getDelegate
in interfaceComponentAdapter<T>
- Returns:
- the next component adapter in line or null if there is no delegate ComponentAdapter.
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findAdapterOfType
Description copied from interface:ComponentAdapter
Locates a component adapter of type componentAdapterType in the ComponentAdapter chain. Will return null if there is no adapter of the given type.- Specified by:
findAdapterOfType
in interfaceComponentAdapter<T>
- Type Parameters:
U
- the type of ComponentAdapter being located.- Parameters:
adapterType
- the class of the adapter type being located. Never null.- Returns:
- the appropriate component adapter of type U. May return null if the component adapter type is not returned.
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accept
Description copied from interface:ComponentAdapter
Accepts a visitor for this ComponentAdapter. The method is normally called by visiting aPicoContainer
, that cascades the visitor also down to all its ComponentAdapter instances.- Specified by:
accept
in interfaceComponentAdapter<T>
- Parameters:
visitor
- the visitor.
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changeMonitor
Delegates change of monitor if the delegate supports a component monitor strategy. Changes the component monitor used- Specified by:
changeMonitor
in interfaceComponentMonitorStrategy
- Parameters:
monitor
- the new ComponentMonitor to use
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currentMonitor
Returns delegate's current monitor if the delegate supports a component monitor strategy. Returns the monitor currently used- Specified by:
currentMonitor
in interfaceComponentMonitorStrategy
- Returns:
- The ComponentMonitor currently used
- Throws:
PicoCompositionException
- if no component monitor is found in delegate
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start
Invokes delegate start method if the delegate is a Behavior Invoke the "start" method on the component.- Specified by:
start
in interfaceComponentLifecycle<T>
- Parameters:
container
- the container to "start" the component
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stop
Invokes delegate stop method if the delegate is a Behavior Invoke the "stop" method on the component.- Specified by:
stop
in interfaceComponentLifecycle<T>
- Parameters:
container
- the container to "stop" the component
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dispose
Invokes delegate dispose method if the delegate is a Behavior Invoke the "dispose" method on the component.- Specified by:
dispose
in interfaceComponentLifecycle<T>
- Parameters:
container
- the container to "dispose" the component
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componentHasLifecycle
public boolean componentHasLifecycle()Invokes delegate hasLifecycle method if the delegate is a Behavior Test if a component honors a lifecycle.- Specified by:
componentHasLifecycle
in interfaceComponentLifecycle<T>
- Returns:
true
if the component has a lifecycle
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isStarted
public boolean isStarted()- Specified by:
isStarted
in interfaceComponentLifecycle<T>
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start
Invokes delegate start method if the delegate is a LifecycleStrategy Invoke the "start" method on the component instance if this is startable. It is up to the implementation of the strategy what "start" and "startable" means.- Specified by:
start
in interfaceLifecycleStrategy
- Parameters:
component
- the instance of the component to start
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stop
Invokes delegate stop method if the delegate is a LifecycleStrategy Invoke the "stop" method on the component instance if this is stoppable. It is up to the implementation of the strategy what "stop" and "stoppable" means.- Specified by:
stop
in interfaceLifecycleStrategy
- Parameters:
component
- the instance of the component to stop
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dispose
Invokes delegate dispose method if the delegate is a LifecycleStrategy Invoke the "dispose" method on the component instance if this is disposable. It is up to the implementation of the strategy what "dispose" and "disposable" means.- Specified by:
dispose
in interfaceLifecycleStrategy
- Parameters:
component
- the instance of the component to dispose
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hasLifecycle
Invokes delegate hasLifecycle(Class) method if the delegate is a LifecycleStrategy Test if a component instance has a lifecycle.- Specified by:
hasLifecycle
in interfaceLifecycleStrategy
- Parameters:
type
- the component's type- Returns:
true
if the component has a lifecycle
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isLazy
Description copied from interface:LifecycleStrategy
Is a component eager (not lazy) in that it should start when start() or equivalent is called, or lazy (it will only start on first getComponent() ). The default is the first of those two.- Specified by:
isLazy
in interfaceLifecycleStrategy
- Returns:
- true if lazy, false if not lazy
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toString
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