/**
* Abiquo community edition
* cloud management application for hybrid clouds
* Copyright (C) 2008-2010 - Abiquo Holdings S.L.
*
* This application is free software; you can redistribute it and/or
* modify it under the terms of the GNU LESSER GENERAL PUBLIC
* LICENSE as published by the Free Software Foundation under
* version 3 of the License
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* LESSER GENERAL PUBLIC LICENSE v.3 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
package com.abiquo.server.core.scheduler;
import java.io.Serializable;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import com.abiquo.server.core.scheduler.EnterpriseExclusionRule;
import com.abiquo.server.core.scheduler.FitPolicyRule;
import com.abiquo.server.core.scheduler.MachineLoadRule;
import com.abiquo.server.core.scheduler.PersistentRule;
/**
* Utility methods to manipulate Workload Rules.
*
* @author ibarrera
*/
public class RuleUtils
{
/**
* Sorts the given rule list.
*
* @param rules The rule list to sort.
*/
public static void sort(final List< ? extends PersistentRule> rules)
{
Collections.sort(rules, new RuleComparator());
}
/**
* Comparator used to sort a set of Workload rules.
*
* @author ibarrera
*/
private static class RuleComparator implements Comparator<PersistentRule>, Serializable
{
/** Serial UID. */
private static final long serialVersionUID = 1L;
@Override
public int compare(final PersistentRule rule0, final PersistentRule rule1)
{
return getWeight(rule0) - getWeight(rule1);
}
private int getWeight(final PersistentRule rule)
{
if (rule instanceof FitPolicyRule)
{
return 0;
}
else if (rule instanceof EnterpriseExclusionRule)
{
return 1;
}
else if (rule instanceof MachineLoadRule)
{
return 2;
}
else
{
return 3;
}
}
}
}