2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2019 Nordix Foundation.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.models.dao;
23 import javax.ws.rs.core.Response;
25 import org.onap.policy.common.utils.validation.Assertions;
26 import org.onap.policy.models.base.PfModelException;
27 import org.slf4j.Logger;
28 import org.slf4j.LoggerFactory;
31 * This factory class returns a Policy Framework DAO for the configured persistence mechanism. The
32 * factory uses the plugin class specified in {@link DaoParameters} to instantiate a DAO instance.
34 * @author Liam Fallon (liam.fallon@est.tech)
36 public class PfDaoFactory {
37 // Get a reference to the logger
38 private static final Logger LOGGER = LoggerFactory.getLogger(PfDaoFactory.class);
41 * Return a Policy Framework DAO for the required Policy Framework DAO plugin class.
43 * @param daoParameters parameters to use to read the database configuration information
44 * @return the Policy Framework DAO
45 * @throws PfModelException on invalid JPA plugins
47 public PfDao createPfDao(final DaoParameters daoParameters) throws PfModelException {
48 Assertions.argumentOfClassNotNull(daoParameters, PfModelException.class,
49 "Parameter \"daoParameters\" may not be null");
51 // Get the class for the DAO using reflection
52 Object pfDaoObject = null;
54 pfDaoObject = Class.forName(daoParameters.getPluginClass()).newInstance();
55 } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) {
57 "Policy Framework DAO class not found for DAO plugin \"" + daoParameters.getPluginClass() + "\"";
58 LOGGER.error(errorMessage, e);
59 throw new PfModelException(Response.Status.INTERNAL_SERVER_ERROR, errorMessage, e);
62 // Check the class is a Policy Framework DAO
63 if (!(pfDaoObject instanceof PfDao)) {
64 String errorMessage = "Specified DAO plugin class \"" + daoParameters.getPluginClass()
65 + "\" does not implement the PfDao interface";
66 LOGGER.error(errorMessage);
67 throw new PfModelException(Response.Status.INTERNAL_SERVER_ERROR, errorMessage);
70 return (PfDao) pfDaoObject;