raplaentitycomparator.java

Rapla是一个灵活的多用户资源管理系统。它提供的一些功能有：日历GUI

package org.rapla.storage.xml;

import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;

import org.rapla.entities.Category;
import org.rapla.entities.RaplaObject;
import org.rapla.entities.RaplaType;
import org.rapla.entities.User;
import org.rapla.entities.configuration.Preferences;
import org.rapla.entities.domain.Allocatable;
import org.rapla.entities.domain.Period;
import org.rapla.entities.domain.Reservation;
import org.rapla.entities.dynamictype.DynamicType;

public class RaplaEntityComparator implements Comparator
{
    Map ordering = new HashMap();
    public RaplaEntityComparator()
    {
        int i=0;
        ordering.put( Category.TYPE,new Integer(i++));
        ordering.put( DynamicType.TYPE, new Integer(i++));
        ordering.put( User.TYPE,new Integer(i++));
        ordering.put( Allocatable.TYPE, new Integer(i++));
        ordering.put( Preferences.TYPE,new Integer(i++) );
        ordering.put( Period.TYPE, new Integer(i++) );
        ordering.put( Reservation.TYPE,new Integer(i++));
    }
    
    public int compare( Object o1, Object o2)
    {
        RaplaObject r1 = (RaplaObject) o1;
        RaplaObject r2 = (RaplaObject) o2;
        RaplaType t1 = r1.getRaplaType();
        RaplaType t2 = r2.getRaplaType();
        Integer ord1 = (Integer) ordering.get( t1);
        Integer ord2 = (Integer) ordering.get( t2);
        if ( o1 == o2) 
        {
            return 0;
        }
        
        if ( ord1 != null && ord2 != null)
        {            
            if (ord1.intValue()>ord2.intValue())
            {
                return 1;
            }
            if (ord1.intValue()<ord2.intValue())
                
            {
                return -1;
            }
        }
        if ( ord1 != null && ord2 == null)
        {            
            return -1;
        }
        if ( ord2 != null && ord1 == null)
        {            
            return 1;
        }
        if ( o1.hashCode() > o2.hashCode())
        {
            return 1;
        }
        else
        {
            return -1;
        }
    }

}