TitledLinkGroupingComparator.java

/**
 *
 * Copyright
 * 2009-2015 Jayway Products AB
 * 2016-2017 Föreningen Sambruk
 *
 * Licensed under AGPL, Version 3.0 (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.gnu.org/licenses/agpl.txt
 *
 * 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 se.streamsource.streamflow.client.util;

import se.streamsource.dci.value.link.TitledLinkValue;
import se.streamsource.streamflow.util.Strings;

import java.util.Comparator;

/**
 * JAVADOC
 */
public class TitledLinkGroupingComparator
        implements Comparator<TitledLinkValue>
{
   private String topValue = "";

   public TitledLinkGroupingComparator()
   {
   }

   public TitledLinkGroupingComparator(String topValue)
   {
      this.topValue = topValue;
   }

   public int compare(TitledLinkValue o1, TitledLinkValue o2)
   {
      int value = -1;
      String s1 = o1.title().get();
      String s2 = o2.title().get();

      if (!Strings.empty(topValue))
      {
         if (topValue.equals(s1) && !topValue.equals(s2))
         {
            value = -1;
         } else if (!topValue.equals(s1) && topValue.equals(s2))
         {
            value = 1;
         } else
            value = s1.compareTo(s2);

      } else
      {
         value = s1.compareTo(s2);
      }

      return value;
   }
}