package pl.edu.icm.saos.webapp.analysis.request;

import com.google.common.base.Objects;
import com.google.common.base.Preconditions;


/**
 * 
 * A range defined as a period limited by start and end month-year pairs.
 * 
 * @author Łukasz Dumiszewski
 */

public class MonthYearRange {

    private int startMonth;
    private int startYear;
    
    private int endMonth;
    private int endYear;
    
    
    
    //------------------------ GETTERS --------------------------
    
    /**
     * Start month of the range 
     */
    public int getStartMonth() {
        return startMonth;
    }
    
    /**
     * Start year of the range 
     */
    public int getStartYear() {
        return startYear;
    }
    
    /**
     * End month of the year
     */
    public int getEndMonth() {
        return endMonth;
    }
    
    /**
     * End year of the range
     */
    public int getEndYear() {
        return endYear;
    }
    
    

   
    //------------------------ SETTERS --------------------------
    
    public void setStartMonth(int startMonth) {
        
        Preconditions.checkArgument(startMonth > 0);
        
        this.startMonth = startMonth;
    }
    
    
    public void setStartYear(int startYear) {
        
        Preconditions.checkArgument(startYear > 0);
        
        this.startYear = startYear;
    }
    
    
    public void setEndMonth(int endMonth) {
        
        Preconditions.checkArgument(endMonth > 0);
        
        this.endMonth = endMonth;
    }
    
    
    public void setEndYear(int endYear) {
        
        Preconditions.checkArgument(endYear > 0);
        
        this.endYear = endYear;
    }
    
    
    
    //------------------------ HashCode & Equals --------------------------
    
    @Override
    public int hashCode() {
        return Objects.hashCode(startMonth, startYear, endMonth, endYear);
    }
    
    
    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        final MonthYearRange other = (MonthYearRange) obj;
        return Objects.equal(this.startMonth, other.startMonth) &&
                Objects.equal(this.startYear, other.startYear) &&
                Objects.equal(this.endMonth, other.endMonth) &&
                Objects.equal(this.endYear, other.endYear);
    }
    
    
    
    //------------------------ toString --------------------------
    
    @Override
    public String toString() {
        return "MonthYearRange [startMonth=" + startMonth + ", startYear="
                + startYear + ", endMonth=" + endMonth + ", endYear=" + endYear
                + "]";
    }
    
    
}