/* 
 * Copyright (c) 2016, Jarmo Juujärvi, Sami Kallio, Kai Korhonen, Juha Moisio, Ilari Paananen 
 * Copyright (c) 2019, Visa Nykänen, Tuomas Moisio, Petra Puumala, Karoliina Lappalainen 
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     1. Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     2. Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *
 *     3. Neither the name of the copyright holder nor the names of its 
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.moveatis.category;

import javax.ejb.Stateless;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import com.moveatis.abstracts.AbstractBean;
import com.moveatis.abstracts.AbstractCategoryEntity;
import com.moveatis.abstracts.AbstractCategorySetEntity;
import com.moveatis.interfaces.Category;
import com.moveatis.interfaces.CategorySet;

/**
 * The EJB manages categories for both feedbackanalysis and observation.
 * 
 * @author Sami Kallio <phinaliumz at outlook.com>
 */
@Stateless
public class CategoryBean extends AbstractBean<AbstractCategoryEntity> implements Category {

	@PersistenceContext(unitName = "MOVEATIS_PERSISTENCE")
	private EntityManager em;

	@Inject
	private CategorySet categorySetEJB;

	@Override
	protected EntityManager getEntityManager() {
		return em;
	}

	public CategoryBean() {
		super(AbstractCategoryEntity.class);
	}

	/**
	 * Removes the category from the category set.
	 * 
	 * @param whichCategorySet
	 *            The category set the category belongs to.
	 * @param whichCategory
	 *            The category to be removed.
	 */
	@Override
	public void removeFromCategorySet(AbstractCategorySetEntity whichCategorySet,
			AbstractCategoryEntity whichCategory) {

		super.remove(whichCategory);
		categorySetEJB.removeCategoryFromCategorySet(whichCategorySet, whichCategory);
		whichCategory.setCategorySet(null);
		super.edit(whichCategory);
	}
}