Content of file DisplayableComparator.java

/*
 * #%L
 * *********************************************************************************************************************
 *
 * These Foolish Things - Miscellaneous utilities
 * http://thesefoolishthings.tidalwave.it - git clone git@bitbucket.org:tidalwave/thesefoolishthings-src.git
 * %%
 * Copyright (C) 2009 - 2021 Tidalwave s.a.s. (http://tidalwave.it)
 * %%
 * *********************************************************************************************************************
 *
 * Licensed under the Apache 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.apache.org/licenses/LICENSE-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.
 *
 * *********************************************************************************************************************
 *
 * $Id$
 *
 * *********************************************************************************************************************
 * #L%
 */
package it.tidalwave.text;

import javax.annotation.Nonnull;
import java.util.Comparator;
import java.text.Collator;
import java.io.Serializable;
import it.tidalwave.role.Displayable;

/***********************************************************************************************************************
 *
 * A {@link Comparator} for classes implementing the {@link Displayable} role.
 * FIXME: don't use it, it requires the objects to statically implement Displayable
 *
 * @author  Fabrizio Giudici
 * @version $Id$
 * @it.tidalwave.javadoc.draft Will be removed (FIXME)
)
 *
 **********************************************************************************************************************/
public final class DisplayableComparator implements Comparator<Displayable>, Serializable
  {
    private static final DisplayableComparator INSTANCE = new DisplayableComparator();
    private static final long serialVersionUID = 3785982561399322970L;

    private final Collator collator = Collator.getInstance();

    @Nonnull
    public static DisplayableComparator getInstance()
      {
        return INSTANCE;
      }

    @Override
    public int compare (final @Nonnull Displayable d1, final @Nonnull Displayable d2)
      {
        return collator.compare(d1.getDisplayName(), d2.getDisplayName());
      }
  }