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

package org.leumasjaffe.recipe.model;

import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.function.Supplier;
import java.util.stream.Collectors;

import org.leumasjaffe.observer.Observable;

import com.fasterxml.jackson.annotation.JsonIgnore;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data @AllArgsConstructor @NoArgsConstructor
public class Preparation extends Observable.Instance implements RecipeComponent {
	Duration duration;
	@JsonIgnore Supplier<Collection<Ingredient>> producer = Collections::emptyList;
	
	@JsonIgnore
	public List<Ingredient> getIngredients() {
		return producer.get().stream().filter(Ingredient::hasPreparation)
				.collect(Collectors.toList());
	}
}