java-recipe-manager/src/main/lombok/org/leumasjaffe/recipe/model/CompoundRecipeComponent.java

package org.leumasjaffe.recipe.model;

import java.util.Collection;
import java.util.stream.Stream;

import org.leumasjaffe.recipe.util.Collator;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

@JsonIgnoreProperties({"duration", "ingredients", "components", "ingredientsAsStream"})
interface CompoundRecipeComponent extends RecipeComponent {
	Stream<? extends RecipeComponent> getComponents();
	Stream<Ingredient> getIngredientsAsStream();
	
	@Override
	default Duration getDuration() {
		return getComponents().map(RecipeComponent::getDuration)
				.reduce(Duration.ZERO, Duration::plus);
	}
	
	@Override
	default Collection<Ingredient> getIngredients() {
		return Collator.collateBy(getIngredientsAsStream(), Ingredient::key, Ingredient::plus);
	}
}