GalleryLoaderSupport.java
- /*
- * #%L
- * *********************************************************************************************************************
- *
- * NorthernWind - lightweight CMS
- * http://northernwind.tidalwave.it - git clone https://bitbucket.org/tidalwave/northernwind-src.git
- * %%
- * Copyright (C) 2011 - 2023 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.
- *
- * *********************************************************************************************************************
- *
- *
- * *********************************************************************************************************************
- * #L%
- */
- package it.tidalwave.northernwind.frontend.ui.component.gallery.spi.loader;
- import javax.annotation.Nonnull;
- import org.springframework.beans.factory.BeanFactory;
- import org.springframework.beans.factory.NoSuchBeanDefinitionException;
- import it.tidalwave.util.Id;
- import it.tidalwave.util.Key;
- import it.tidalwave.northernwind.core.model.ResourceProperties;
- import it.tidalwave.northernwind.frontend.ui.component.gallery.GalleryViewController.GalleryItem;
- import it.tidalwave.northernwind.frontend.ui.component.gallery.spi.GalleryLoader;
- import it.tidalwave.northernwind.frontend.ui.component.gallery.spi.MediaMetadataProvider;
- import lombok.extern.slf4j.Slf4j;
- /***********************************************************************************************************************
- *
- * A support implementation for {@link GalleryLoader}, provides a default factory method for creating gallery
- * {@link GalleryItem}s which delegates to a {@link MediaMetadataProvider}.
- *
- * @author Fabrizio Giudici
- *
- **********************************************************************************************************************/
- @Slf4j
- public abstract class GalleryLoaderSupport implements GalleryLoader
- {
- private static final Key<String> P_MEDIA_METADATA_PROVIDER = Key.of("mediaMetadataProvider", String.class);
- @Nonnull
- private final BeanFactory beanFactory;
- @Nonnull
- private final MediaMetadataProvider mediaMetadataProvider;
- @Nonnull
- private final ResourceProperties properties;
- /*******************************************************************************************************************
- *
- *
- ******************************************************************************************************************/
- protected GalleryLoaderSupport (@Nonnull final BeanFactory beanFactory,
- @Nonnull final ResourceProperties properties)
- {
- this.beanFactory = beanFactory;
- this.properties = properties;
- mediaMetadataProvider = findMediaMetadataProvider();
- }
- /*******************************************************************************************************************
- *
- * Creates a gallery {@link GalleryItem} for the given media id.
- *
- * @param mediaId the media id
- * @return the gallery {@code Item}
- *
- *
- ******************************************************************************************************************/
- @Nonnull
- public GalleryItem createItem (@Nonnull final Id mediaId)
- {
- return new GalleryItem(mediaId, mediaMetadataProvider.getMetadataString(mediaId, "$XMP.dc.title$", properties));
- }
- /*******************************************************************************************************************
- *
- * Finds the {@link MediaMetadataProvider}.
- *
- ******************************************************************************************************************/
- @Nonnull
- private MediaMetadataProvider findMediaMetadataProvider()
- {
- final var metadataProviderName = properties.getProperty(P_MEDIA_METADATA_PROVIDER).orElse("");
- try
- {
- return beanFactory.getBean(metadataProviderName, MediaMetadataProvider.class);
- }
- catch (NoSuchBeanDefinitionException e)
- {
- log.warn("Cannot find bean: {}", metadataProviderName);
- return MediaMetadataProvider.VOID;
- }
- }
- }