/*
* Sone - ImageAccessor.java - Copyright © 2011–2013 David Roden
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.pterodactylus.sone.template;
import net.pterodactylus.sone.data.Album;
import net.pterodactylus.sone.data.Image;
import net.pterodactylus.util.template.Accessor;
import net.pterodactylus.util.template.ReflectionAccessor;
import net.pterodactylus.util.template.TemplateContext;
/**
* {@link Accessor} implementation for {@link Image} objects. It adds the
* following properties:
* <ul>
* <li>{@code previous}: returns the previous image in the image’s album, or
* {@code null} if the image is the first image of its album.</li>
* <li>{@code next}: returns the next image in the image’s album, or {@code
* null} if the image is the last image of its album.</li>
* </ul>
*
* @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
*/
public class ImageAccessor extends ReflectionAccessor {
/**
* {@inheritDoc}
*/
@Override
public Object get(TemplateContext templateContext, Object object, String member) {
Image image = (Image) object;
if ("next".equals(member)) {
Album album = image.getAlbum();
int imagePosition = album.getImages().indexOf(image);
if (imagePosition < album.getImages().size() - 1) {
return album.getImages().get(imagePosition + 1);
}
return null;
} else if ("previous".equals(member)) {
Album album = image.getAlbum();
int imagePosition = album.getImages().indexOf(image);
if (imagePosition > 0) {
return album.getImages().get(imagePosition - 1);
}
return null;
}
return super.get(templateContext, object, member);
}
}