RepositoryOptimizedTrackFinder.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.catalog.finder;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import java.util.Optional;
import org.eclipse.rdf4j.repository.Repository;
import lombok.ToString;
/***********************************************************************************************************************
*
* An optimised specialisation of {@link RepositoryTrackFinder} that eventually uses an optional pre-computed value for
* the track count.
*
* @stereotype Finder
*
* @author Fabrizio Giudici
*
**********************************************************************************************************************/
@ToString
public class RepositoryOptimizedTrackFinder extends RepositoryTrackFinder
{
private static final long serialVersionUID = -4361362680267527615L;
@Nonnull
private final Optional<Integer> trackCount;
public RepositoryOptimizedTrackFinder (@Nonnull final Repository repository,
@Nonnull final Optional<Integer> trackCount)
{
super(repository);
this.trackCount = trackCount;
}
public RepositoryOptimizedTrackFinder (@Nonnull final RepositoryOptimizedTrackFinder other,
@Nonnull final Object override)
{
super(other, override);
final RepositoryOptimizedTrackFinder source = getSource(RepositoryOptimizedTrackFinder.class, other, override);
this.trackCount = source.trackCount;
}
@Override @Nonnegative
public int count()
{
// in case other parameters are added, remember to check for them
return (recordId.isPresent() && makerId.isEmpty()) ? trackCount.orElseGet(super::count) : super.count();
}
}