package kata.gameoflife.a20170806;

import java.util.HashSet;
import java.util.Set;

/**
  * Game of Life Kata.
  * Copyright (c) 2017, Peter Kofler, licensed under BSD License.
  */
public class LookupLivingCells {

    private final Set<LocateCell> livingCells = new HashSet<>();

    public void reproduce(LocateCell locateCell) {
        livingCells.add(locateCell);
    }

    public boolean isAlive(LocateCell locateCell) {
        return livingCells.contains(locateCell);
    }

    @Override
    public int hashCode() {
        return 5;
    }

    @Override
    public boolean equals(Object o) {
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        LookupLivingCells that = (LookupLivingCells) o;
        return this.livingCells.equals(that.livingCells);
        // TODO only used for assertions in tests
    }

    // The collection of locate cells is a first class citizen in OO.
    // What are the actions it offers? This is a generation, but what
    // does it do? It adds living cells and looks them up again.
}