Package oracle.dbtools.plugin.api.di
Class DeferredInstanceProvider<T>
java.lang.Object
oracle.dbtools.plugin.api.di.DeferredInstanceProvider<T>
- Type Parameters:
T- The type of instance to provide
- All Implemented Interfaces:
jakarta.inject.Provider<T>,Iterable<T>,Supplier<T>,InstanceProvider<T>
InstanceProvider implementation that defers resolving an instance
until get(), hasMultiple(), isUnsatisfied(), or
iterator() is invoked- Since:
- 19.3.0
- Author:
- cdivilly
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Method Summary
Modifier and TypeMethodDescriptionstatic <T> DeferredInstanceProvider<T>from(TypeQualifier<T> service, InstanceLocator locator) Instantiate aDeferredInstanceProviderget()Retrieve the first available instancebooleanDetermines if there is more than one available implementation for the required type and qualifiersbooleanDetermines if there is no available implementation for the required type and qualifiers.iterator()When a service has multiple providers (which can be determined by callingInstanceProvider.isAmbiguous()) this iterator enumerates each of the available providersIdentifies the constraints used to select matchestoString()Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitMethods inherited from interface oracle.dbtools.plugin.api.di.InstanceProvider
getOrNull, isAmbiguous, isAvailable, isUnavailable, orElse, streamMethods inherited from interface java.lang.Iterable
forEach, spliterator
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Method Details
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get
Description copied from interface:InstanceProviderRetrieve the first available instance -
hasMultiple
public boolean hasMultiple()Description copied from interface:InstanceProviderDetermines if there is more than one available implementation for the required type and qualifiers- Specified by:
hasMultiplein interfaceInstanceProvider<T>- Returns:
- true if there are multiple providers, false otherwise
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isUnsatisfied
public boolean isUnsatisfied()Description copied from interface:InstanceProviderDetermines if there is no available implementation for the required type and qualifiers. If this method returns true, then callingInstanceProvider.get()will raise aRuntimeException- Specified by:
isUnsatisfiedin interfaceInstanceProvider<T>- Returns:
- true if there is no provider, false otherwise
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iterator
Description copied from interface:InstanceProviderWhen a service has multiple providers (which can be determined by callingInstanceProvider.isAmbiguous()) this iterator enumerates each of the available providers -
qualifier
Description copied from interface:InstanceProviderIdentifies the constraints used to select matches- Specified by:
qualifierin interfaceInstanceProvider<T>- Returns:
TypeQualifierinstance
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toString
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from
public static <T> DeferredInstanceProvider<T> from(TypeQualifier<T> service, InstanceLocator locator) Instantiate aDeferredInstanceProvider- Type Parameters:
T- The type of instance to provide- Parameters:
service- The service that needs to be providedlocator- The locator that can provide the service.- Returns:
DeferredInstanceProvider
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