io.datakernel.di.core.InstanceProvider Maven / Gradle / Ivy

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package io.datakernel.di.core;

/**
 * A provider, unlike other DI frameworks, is just a version of {@link Injector#getInstance} with a baked in key.
 * If you need a function that returns a new object each time then you are looking for {@link InstanceFactory}.
 * 
 * The main reason for its existence is that it has a {@link io.datakernel.di.module.DefaultModule default generator}
 * for its binding so it can be fluently requested by {@link io.datakernel.di.annotation.Provides provider methods} etc.
 * 
 * Also it can be used for lazy dependency cycle resolution.
 */
public interface InstanceProvider {
	Key key();

	T get();
}