Паттерн Цепочка обязанностей(Chain of responsibility). Пример кода

public class HouseProject {
    private final Set steps = new HashSet();
    
    public HouseProject(Steps... steps) {
        this.steps.addAll(Arrays.asList(steps));
    }
    
    public enum Steps {
        CREATE_BASEMENT,
        ADD_FLOOR,
        CREATE_ROOF,
        BUILD_FENCE
    }
    public Set getSteps() {
        return steps;
    }
}

public abstract class Builder {
    protected Builder nextBuilder;
    private final HouseProject.Steps step;
    
    public Builder(HouseProject.Steps step) {
        this.step = step;
    }
    
    public abstract void buildImpl();
    
    public void build(HouseProject project) {
        if (project.getSteps().contains(step)) {
            buildImpl();
        }
        if (nextBuilder != null) {
            nextBuilder.build(project);
        }
    }
    
    public Builder setNext(Builder builder) {
        nextBuilder = builder;
        return builder;
    }
}

public class BasementBuilder extends Builder {
    public BasementBuilder() {
        super(HouseProject.Steps.CREATE_BASEMENT);
    }

    @Override
    public void buildImpl() {
        System.out.println("Building basement");
    }
}

public class FloorBuilder extends Builder {
    public FloorBuilder() {
        super(HouseProject.Steps.ADD_FLOOR);
    }

    @Override
    public void buildImpl() {
        System.out.println("Building floor");
    }
}

public class RoofBuilder extends Builder {
    public RoofBuilder() {
        super(HouseProject.Steps.CREATE_ROOF);
    }

    @Override
    public void buildImpl() {
        System.out.println("Building roof");
    }
}

public class FecneBuilder extends Builder {
    public FecneBuilder() {
        super(HouseProject.Steps.BUILD_FENCE);
    }

    @Override
    public void buildImpl() {
        System.out.println("Building fence");
    }
}

public class Client {
    public static void main(String[] args) {
        Builder firstBuilder, lastBuilder;
        firstBuilder = lastBuilder = new BasementBuilder();
        lastBuilder = lastBuilder.setNext(new FloorBuilder())
                                 .setNext(new RoofBuilder())
                                 .setNext(new FecneBuilder());
        
        HouseProject hp = new HouseProject(
            HouseProject.Steps.CREATE_BASEMENT,
            HouseProject.Steps.ADD_FLOOR,
            HouseProject.Steps.CREATE_ROOF
        );
        
        firstBuilder.build(hp);
    }
}

/**
 * Output:
 * Building basement
 * Building floor
 * Building roof
 */