package de.intevation.flys.importer;

import de.intevation.flys.model.WstColumnValue;
import de.intevation.flys.model.DischargeTableValue;
import de.intevation.flys.model.Range;

import java.math.BigDecimal;

public class IdValueKey {

    protected int        id;
    protected BigDecimal a;
    protected BigDecimal b;


    public IdValueKey(WstColumnValue value) {
        this.id = value.getWstColumn().getId();
        this.a  = value.getPosition();
        this.b  = value.getW();
    }

    public IdValueKey(DischargeTableValue value) {
        this.id = value.getDischargeTable().getId();
        this.a  = value.getQ();
        this.b  = value.getW();
    }

    public IdValueKey(Range value) {
        this.id = value.getRiver().getId();
        this.a  = value.getA();
        this.b  = value.getB();
    }


    public IdValueKey(int id, BigDecimal a, BigDecimal b) {
        this.id = id;
        this.a  = a;
        this.b  = b;
    }

    private static final int hashCode(BigDecimal d) {
        return d != null ? d.hashCode() : 0;
    }

    @Override
    public int hashCode() {
        return id | (hashCode(a) << 10) | (hashCode(b) << 20);
    }

    @Override
    public boolean equals(Object obj) {
        if (!(obj instanceof IdValueKey)) {
            return false;
        }

        IdValueKey other = (IdValueKey) obj;

        return !((id != other.id) 
            || (a == null && other.a != null) 
            || (a != null && other.a == null) 
            || (a != null && !a.equals(other.a)) 
            || (b == null && other.b != null) 
            || (b != null && other.b == null) 
            || (b != null && !b.equals(other.b)));
    }
}
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