package dk.daoas.adressevedligehold.afstandandenrute;

public abstract class Constants {
	
	private static Constants singleton = null;
	
	abstract public double getMaxDistance();
	
	abstract public int getMinPostnr();
	abstract public int getMaxPostnr();
	
	abstract public boolean validatePostnr(short postnr);
	
	abstract public String getTableExtension();
	
	abstract public boolean doCheckHO();
	
	
	public static Constants getInstance() { //Singleton-ish 
		return singleton;
	}
	
	public static void init(String distributor) {
		
		if (distributor.equals("DAO")) {
			singleton = new DaoConstants();
		} else if (distributor.equals("BK")){
			singleton = new BKConstants();
		} else {
			throw new RuntimeException("Ukendt distributor: " + distributor);
		}
		
	}
	
	
}