Package org.picocontainer
Class DefaultPicoContainer.KnowsContainerAdapter<T>
java.lang.Object
org.picocontainer.DefaultPicoContainer.KnowsContainerAdapter<T>
- All Implemented Interfaces:
ComponentAdapter<T>
- Enclosing class:
- DefaultPicoContainer
public static class DefaultPicoContainer.KnowsContainerAdapter<T>
extends Object
implements ComponentAdapter<T>
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Nested Class Summary
Nested classes/interfaces inherited from interface org.picocontainer.ComponentAdapter
ComponentAdapter.NOTHING
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
accept
(PicoVisitor visitor) Accepts a visitor for this ComponentAdapter.<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
(Type into) getComponentInstance
(PicoContainer container) Retrieve the component instance.getComponentInstance
(PicoContainer container, Type into) Retrieve the component instance.Retrieve the key associated with the component.Component adapters may be nested in a chain, and this method is used to grab the next ComponentAdapter in the chain.Get a string key descriptor of the component adapter for use in toString()void
verify
(PicoContainer container) Verify that all dependencies for this adapter can be satisfied.
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Constructor Details
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KnowsContainerAdapter
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Method Details
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getComponentInstance
- Throws:
PicoCompositionException
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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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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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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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getDescriptor
Description copied from interface:ComponentAdapter
Get a string key descriptor of the component adapter for use in toString()- Specified by:
getDescriptor
in interfaceComponentAdapter<T>
- Returns:
- the descriptor
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