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java.lang.Object com.google.inject.spi.ProviderLookup<T>
public final class ProviderLookup<T>
A lookup of the provider for a type. Lookups are created explicitly in a module using
getProvider()
statements:
Provider<PaymentService> paymentServiceProvider = getProvider(PaymentService.class);
Constructor Summary | |
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ProviderLookup(Object source,
Key<T> key)
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Method Summary | ||
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acceptVisitor(ElementVisitor<T> visitor)
Accepts an element visitor. |
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void |
applyTo(Binder binder)
Writes this module element to the given binder (optional operation). |
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Provider<T> |
getDelegate()
Returns the delegate provider, or null if it has not yet been initialized. |
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Key<T> |
getKey()
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Provider<T> |
getProvider()
Returns the looked up provider. |
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Object |
getSource()
Returns an arbitrary object containing information about the "place" where this element was configured. |
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void |
initializeDelegate(Provider<T> delegate)
Sets the actual provider. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ProviderLookup(Object source, Key<T> key)
Method Detail |
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public Object getSource()
Element
Tools might specially handle types they know about; StackTraceElement
is a good
example. Tools should simply call toString()
on the source object if the type is
unfamiliar.
getSource
in interface Element
public Key<T> getKey()
public <T> T acceptVisitor(ElementVisitor<T> visitor)
Element
acceptVisitor
in interface Element
visitor
- to call back onpublic void initializeDelegate(Provider<T> delegate)
IllegalStateException
- if the delegate is already setpublic void applyTo(Binder binder)
Element
applyTo
in interface Element
binder
- to apply configuration element topublic Provider<T> getDelegate()
null
if it has not yet been initialized. The delegate
will be initialized when this element is processed, or otherwise used to create an injector.
public Provider<T> getProvider()
IllegalStateException
if you try to use it beforehand.
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