xapi.util.impl.LazyProvider Maven / Gradle / Ivy

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package xapi.util.impl;

import javax.inject.Provider;

import xapi.inject.impl.SingletonProvider;

public class LazyProvider  extends SingletonProvider {

  private final Provider provider;

  public LazyProvider(Provider provider) {
    this.provider = provider;
  }
  
  public LazyProvider(T maybeNull, Provider provider) {
    this.provider = 
        maybeNull == null 
          ? provider 
          : new ImmutableProvider<>(maybeNull);
  }
  
  @Override
  protected final T initialValue() {
    return provider.get();
  }
}