Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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. */ package org.syncope.core.persistence.dao.impl; import java.util.List; import javax.persistence.Query; import org.springframework.stereotype.Repository; import org.syncope.core.persistence.beans.AbstractAttr; import org.syncope.core.persistence.dao.AttrDAO; @Repository public class AttrDAOImpl extends AbstractDAOImpl implements AttrDAO { @Override public <T extends AbstractAttr> T find(final Long id, final Class<T> reference) { return entityManager.find(reference, id); } @Override public <T extends AbstractAttr> List<T> findAll(final Class<T> reference) { Query query = entityManager.createQuery("SELECT e FROM " + reference.getSimpleName() + " e"); return query.getResultList(); } @Override public <T extends AbstractAttr> T save(final T attribute) { return entityManager.merge(attribute); } @Override public <T extends AbstractAttr> void delete(final Long id, final Class<T> reference) { T attribute = find(id, reference); if (attribute == null) { return; } delete(attribute); } @Override public <T extends AbstractAttr> void delete(final T attribute) { if (attribute.getOwner() != null) { attribute.getOwner().removeAttribute(attribute); } entityManager.remove(attribute); } }