SceneSelectionService.java

/**
 *  C-Nery - A home automation web application for C-Bus.
 *  Copyright (C) 2008,2009,2012  Dave Oxley <dave@daveoxley.co.uk>.
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package com.daveoxley.cnery.services;

import com.daveoxley.cnery.dao.SceneDAO;
import com.daveoxley.cnery.entities.Scene;
import com.daveoxley.seam.exceptions.EntityNotFoundException;
import com.daveoxley.seam.SelectionService;
import java.io.Serializable;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.Factory;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Observer;
import org.jboss.seam.annotations.Out;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.core.Events;

/**
 *
 * @author Dave Oxley <dave@daveoxley.co.uk>
 */
@Name("sceneSelectionService")
@Scope(ScopeType.PAGE)
public class SceneSelectionService extends SelectionService<Long> implements Serializable {

    private final static Log log = LogFactory.getLog(SceneSelectionService.class);

    @In
    private SceneDAO sceneDAO;

    @In
    private Events events;

    @Out(value="selectedSceneId",required=false,scope=ScopeType.PAGE)
    @Override
    public Long getSelectedId() {
        return super.getSelectedId();
    }

    @Override
    public void setSelectedId(Long selectedId) throws EntityNotFoundException {
        super.setSelectedId(selectedId);
    }

    @Override
    protected Long cast(Object o) {
        return (Long)o;
    }

    @Out(required=false)
    public Scene getSelectedScene() throws Exception {
        Long selectedSceneId = getSelectedId();
        if (selectedSceneId == null || selectedSceneId <= 0)
            return null;

        try {
            Scene scene = sceneDAO.findScene(selectedSceneId);
            log.debug("SceneSelectionService.getSelectedScene: " + scene != null ? scene.getName() : "null");
            return scene;
        } catch (Exception ex) {
            throw new EntityNotFoundException(selectedSceneId.toString());
        }
    }

    @Factory(autoCreate=true,value="selectedSceneName")
    public String createSelectedSceneName() throws Exception {
        Long selectedSceneId = getSelectedId();
        log.debug("SceneSelectionService.createSelectedSceneName = " + selectedSceneId);
        Scene scene = getSelectedScene();
        if (scene == null)
            return null;
        return scene.getName();
    }

    @Observer(create=false,value="clearSceneSelection")
    public void clearSceneSelection() {
        events.raiseEvent("scenesUpdated", (Object)null);
    }

    @Observer(create=false,value="scenesUpdated")
    public void updateSceneSelection(Long selectionKey) throws EntityNotFoundException {
        setSelectedId(selectionKey);
    }
}