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java.lang.Objectorg.picocontainer.defaults.ComponentParameter
A ComponentParameter should be used to pass in a particular component as argument to a different component's constructor. This is particularly useful in cases where several components of the same type have been registered, but with a different key. Passing a ComponentParameter as a parameter when registering a component will give PicoContainer a hint about what other component to use in the constructor.
Constructor Summary | |
ComponentParameter()
Expect any paramter of the appropriate type. |
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ComponentParameter(Object componentKey)
Expect a parameter matching a component of a specific key. |
Method Summary | |
ComponentAdapter |
resolveAdapter(PicoContainer picoContainer,
Class expectedType)
Retrieve the component adapter that should be used to find the instance to be passed in for this parameter. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public ComponentParameter(Object componentKey)
componentKey
- the key of the desired componentpublic ComponentParameter()
Method Detail |
public ComponentAdapter resolveAdapter(PicoContainer picoContainer, Class expectedType) throws PicoIntrospectionException
Parameter
resolveAdapter
in interface Parameter
picoContainer
- the container from which dependencies are resolved.expectedType
- the type that the returned adapter needs to provide.
null
if not suitable adapter can be found.
PicoIntrospectionException
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