MediaItemComparator.java
/*
* *********************************************************************************************************************
*
* blueMarine II: Semantic Media Centre
* http://tidalwave.it/projects/bluemarine2
*
* Copyright (C) 2015 - 2021 by 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.
*
* *********************************************************************************************************************
*
* git clone https://bitbucket.org/tidalwave/bluemarine2-src
* git clone https://github.com/tidalwave-it/bluemarine2-src
*
* *********************************************************************************************************************
*/
package it.tidalwave.bluemarine2.model.impl;
import javax.annotation.Nonnull;
import java.util.Comparator;
import java.util.List;
import it.tidalwave.role.ui.Displayable;
import it.tidalwave.util.As;
import it.tidalwave.util.AsException;
import it.tidalwave.util.Finder.SortDirection;
import it.tidalwave.util.Finder.InMemorySortCriterion;
import it.tidalwave.bluemarine2.model.MediaItem;
import static it.tidalwave.bluemarine2.model.MediaItem.Metadata.*;
import static it.tidalwave.role.ui.Displayable._Displayable_;
/***********************************************************************************************************************
*
* @author Fabrizio Giudici
*
**********************************************************************************************************************/
public class MediaItemComparator implements InMemorySortCriterion<As>
{
private static final long serialVersionUID = 3413093735254009245L;
private static final Comparator<As> COMPARATOR = (o1, o2) ->
{
try
{
// FIXME: use comparators chaining for lambdas
final MediaItem mi1 = o1.as(MediaItem.class);
final MediaItem mi2 = o2.as(MediaItem.class);
final MediaItem.Metadata m1 = mi1.getMetadata();
final MediaItem.Metadata m2 = mi2.getMetadata();
final int d1 = m1.get(DISK_NUMBER).orElse(1);
final int d2 = m2.get(DISK_NUMBER).orElse(1);
final int t1 = m1.get(TRACK_NUMBER).orElse(0);
final int t2 = m2.get(TRACK_NUMBER).orElse(0);
if (d1 != d2)
{
return d1 - d2;
}
if (t1 != t2)
{
return t1 - t2;
}
}
catch (AsException e) // FIXME: useless?
{
}
return displayNameOf(o1).compareTo(displayNameOf(o2));
};
private static final InMemorySortCriterion<As> DELEGATE = InMemorySortCriterion.of(COMPARATOR);
@Nonnull
private static String displayNameOf (@Nonnull final As object)
{
return object.maybeAs(_Displayable_).map(Displayable::getDisplayName).orElse("???");
}
@Override
public void sort (@Nonnull List<? extends As> results, @Nonnull SortDirection sortDirection)
{
DELEGATE.sort(results, sortDirection);
}
@Override @Nonnull
public String toString()
{
return "MediaItemComparator";
}
}