/*

  * Copyright 2010 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may        obtain a copy of the License at

  *

  *         http://www.osedu.org/licenses/ECL-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.student.contract.model.util;

 import java.util.ArrayList;

 import java.util.List;

 import org.kuali.student.contract.model.Service;

 /**

  *

  * @author nwright

  */

 public class ServicesFilterLatestVersionOnly implements ServicesFilter

 {

  @Override

  public List<Service> filter (List<Service> services)

  {

    List<Service> list = new ArrayList ();

   for (Service target : services)

   {

    int i = findService (list, target.getKey ());

    if (i == -1)

    {

     list.add (target);

     continue;

    }

    Service source = list.get (i);

    if (compare (source.getVersion (), target.getVersion ()) < 0)

    {

     list.set (i, target);

    }

   }

   return list;

  }

  protected int compare (String source, String target)

  {

   if (source.equalsIgnoreCase (target))

   {

    return 0;

   }

   if (target.equalsIgnoreCase ("dev"))

   {

    return  + 1;

   }

   return source.compareToIgnoreCase (target);

  }

  private int findService (List<Service> list, String key)

  {

   for (int i = 0; i < list.size (); i ++)

   {

    Service service = list.get (i);

    if (service.getKey ().equals (key))

    {

     return i;

    }

   }

   return -1;

  }

 }