CompositeDIDLAdapterSupport.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.upnp.mediaserver.impl.didl;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.concurrent.Immutable;
import org.fourthline.cling.support.model.BrowseFlag;
import org.fourthline.cling.support.model.DIDLContent;
import it.tidalwave.util.As;
import it.tidalwave.util.Finder;
import it.tidalwave.bluemarine2.model.spi.Entity;
import it.tidalwave.bluemarine2.rest.spi.ResourceServer;
import lombok.extern.slf4j.Slf4j;
import static it.tidalwave.role.SimpleComposite._SimpleComposite_;
import static it.tidalwave.util.FunctionalCheckedExceptionWrappers.*;
/***********************************************************************************************************************
*
* @stereotype Role
*
* @author Fabrizio Giudici
*
**********************************************************************************************************************/
@Immutable @Slf4j
public abstract class CompositeDIDLAdapterSupport<T extends As> extends DIDLAdapterSupport<T>
{
public CompositeDIDLAdapterSupport (@Nonnull final T datum, @Nonnull final ResourceServer server)
{
super(datum, server);
}
/*******************************************************************************************************************
*
* {@inheritDoc}
*
******************************************************************************************************************/
@Override @Nonnull
public ContentHolder toContent (@Nonnull final BrowseFlag browseFlag,
@Nonnegative final int from,
@Nonnegative final int maxResults)
throws Exception
{
final DIDLContent content = new DIDLContent();
int numberReturned = 0;
int totalMatches = 0;
switch (browseFlag)
{
case METADATA:
totalMatches = numberReturned = 1;
content.addObject(toObject());
break;
case DIRECT_CHILDREN:
final Finder<Entity> finder = datum.as(_SimpleComposite_).findChildren();
totalMatches = finder.count();
finder.from(from)
.max(maxResults)
.results()
.forEach(_c(child -> content.addObject(child.as(_DIDLAdapter_).toObject())));
numberReturned = (int)content.getCount();
break;
default:
throw new IllegalArgumentException(browseFlag.toString());
}
return new ContentHolder(content, numberReturned, totalMatches);
}
}