package pickMaint;

public class LoomDSKey {
	
	private final int DATE;
	private final int SHIFT;
	private final int LOOM;
	private final int WEAVER;
	private final String TYPE;
	
	public LoomDSKey(int date, int shift, int loom, int weaver, String type){
		this.DATE = date;
		this.SHIFT = shift;
		this.LOOM =  loom;
		this.WEAVER = weaver;
		this.TYPE = type;
	}
	
	public String toString(){
		return DATE + "-" + SHIFT + "-" + LOOM + "-" + WEAVER + "-" + TYPE;		
	}
	
	/**
	 * All 5 components of the composite key must be equal
	 */
	@Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof LoomDSKey)) return false;
        LoomDSKey key = (LoomDSKey) o;
        return DATE == key.DATE &&
        		SHIFT == key.SHIFT &&
        		LOOM == key.LOOM &&
        		WEAVER == key.WEAVER &&
        		TYPE.equalsIgnoreCase(key.TYPE);
    }
	
	/**
	 * Obviously not a perfect hash; although I suspect collisions will be rare in our use case.
	 */
	@Override
    public int hashCode() {
        int hash = DATE * SHIFT;
        hash = hash + LOOM;
        hash = hash * (WEAVER / 2);
        hash = hash + TYPE.hashCode();
        return hash;
    }
}