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 org.onap.policy.common.utils.validation.Assertions;
24 import org.onap.policy.models.base.PfModelException;
25 import org.slf4j.Logger;
26 import org.slf4j.LoggerFactory;
29 * This factory class returns a Policy Framework DAO for the configured persistence mechanism. The
30 * factory uses the plugin class specified in {@link DaoParameters} to instantiate a DAO instance.
32 public class PfDaoFactory {
33 // Get a reference to the logger
34 private static final Logger LOGGER = LoggerFactory.getLogger(PfDaoFactory.class);
37 * Return a Policy Framework DAO for the required Policy Framework DAO plugin class.
39 * @param daoParameters parameters to use to read the database configuration information
40 * @return the Policy Framework DAO
41 * @throws PfModelException on invalid JPA plugins
43 public PfDao createPfDao(final DaoParameters daoParameters) throws PfModelException {
44 Assertions.argumentOfClassNotNull(daoParameters, PfModelException.class,
45 "Parameter \"daoParameters\" may not be null");
47 // Get the class for the DAO using reflection
48 Object pfDaoObject = null;
50 pfDaoObject = Class.forName(daoParameters.getPluginClass()).newInstance();
51 } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) {
53 "Policy Framework DAO class not found for DAO plugin \"" + daoParameters.getPluginClass() + "\"";
54 LOGGER.error(errorMessage, e);
55 throw new PfModelException(errorMessage, e);
58 // Check the class is a Policy Framework DAO
59 if (!(pfDaoObject instanceof PfDao)) {
60 String errorMessage = "Specified DAO plugin class \"" + daoParameters.getPluginClass()
61 + "\" does not implement the PfDao interface";
62 LOGGER.error(errorMessage);
63 throw new PfModelException(errorMessage);
66 return (PfDao) pfDaoObject;