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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019, 2023 Nordix Foundation.
* Modifications Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.models.dao;
import jakarta.ws.rs.core.Response;
import java.lang.reflect.InvocationTargetException;
import org.onap.policy.common.utils.validation.Assertions;
import org.onap.policy.models.base.PfModelException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This factory class returns a Policy Framework DAO for the configured persistence mechanism. The
* factory uses the plugin class specified in {@link DaoParameters} to instantiate a DAO instance.
*
* @author Liam Fallon (liam.fallon@est.tech)
*/
public class PfDaoFactory {
// Get a reference to the logger
private static final Logger LOGGER = LoggerFactory.getLogger(PfDaoFactory.class);
/**
* Return a Policy Framework DAO for the required Policy Framework DAO plugin class.
*
* @param daoParameters parameters to use to read the database configuration information
* @return the Policy Framework DAO
* @throws PfModelException on invalid JPA plugins
*/
public PfDao createPfDao(final DaoParameters daoParameters) throws PfModelException {
Assertions.argumentOfClassNotNull(daoParameters, PfModelException.class,
"Parameter \"daoParameters\" may not be null");
// Get the class for the DAO using reflection
Object pfDaoObject;
try {
pfDaoObject = Class.forName(daoParameters.getPluginClass()).getDeclaredConstructor().newInstance();
} catch (InstantiationException | IllegalAccessException | ClassNotFoundException | IllegalArgumentException
| InvocationTargetException | NoSuchMethodException | SecurityException e) {
String errorMessage =
"Policy Framework DAO class not found for DAO plugin \"" + daoParameters.getPluginClass() + "\"";
LOGGER.error(errorMessage);
throw new PfModelException(Response.Status.INTERNAL_SERVER_ERROR, errorMessage, e);
}
// Check the class is a Policy Framework DAO
if (!(pfDaoObject instanceof PfDao)) {
String errorMessage = "Specified DAO plugin class \"" + daoParameters.getPluginClass()
+ "\" does not implement the PfDao interface";
LOGGER.error(errorMessage);
throw new PfModelException(Response.Status.INTERNAL_SERVER_ERROR, errorMessage);
}
return (PfDao) pfDaoObject;
}
}
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