Lifecycle-aware Loader delivering results from a LiveData source

LifecycleLoader.java

package be.digitalia.common.loaders;

import android.arch.lifecycle.Lifecycle;
import android.arch.lifecycle.LifecycleOwner;
import android.arch.lifecycle.LifecycleRegistry;
import android.arch.lifecycle.LiveData;
import android.arch.lifecycle.Observer;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.content.Loader;

public abstract class LifecycleLoader<T> extends Loader<T> implements LifecycleOwner {

	private final LifecycleRegistry registry = new LifecycleRegistry(this);

	public LifecycleLoader(Context context) {
		super(context);
		getLiveData().observe(this, new Observer<T>() {
			@Override
			public void onChanged(@Nullable T data) {
				deliverResult(data);
			}
		});
		registry.handleLifecycleEvent(Lifecycle.Event.ON_CREATE);
	}

	@Override
	protected void onStartLoading() {
		registry.handleLifecycleEvent(Lifecycle.Event.ON_START);
	}

	@Override
	protected void onStopLoading() {
		registry.handleLifecycleEvent(Lifecycle.Event.ON_STOP);
	}

	@Override
	protected void onReset() {
		registry.handleLifecycleEvent(Lifecycle.Event.ON_DESTROY);
	}

	@Override
	public Lifecycle getLifecycle() {
		return registry;
	}

	@NonNull
	protected abstract LiveData<T> getLiveData();
}