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 *  as indicated by the @author tags. See the copyright.txt file in the
 *  distribution for a full listing of individual contributors.
 *
 *  This is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU Lesser General Public License as
 *  published by the Free Software Foundation; either version 2.1 of
 *  the License, or (at your option) any later version.
 *
 *  This software is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this software; if not, write to the Free
 *  Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 *  02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jboss.as.test.integration.jpa.mockprovider.skipquerydetach;

import java.lang.reflect.Proxy;
import java.util.HashMap;
import java.util.Map;

import javax.persistence.EntityManagerFactory;
import javax.persistence.spi.PersistenceProvider;
import javax.persistence.spi.PersistenceUnitInfo;
import javax.persistence.spi.ProviderUtil;

/**
 * TestPersistenceProvider
 *
 * @author Scott Marlow
 */
public class TestPersistenceProvider implements PersistenceProvider {

    // key = pu name
    private static Map<String, PersistenceUnitInfo> persistenceUnitInfo = new HashMap<String, PersistenceUnitInfo>();

    public static PersistenceUnitInfo getPersistenceUnitInfo(String name) {
        return persistenceUnitInfo.get(name);
    }

    @Override
    public EntityManagerFactory createEntityManagerFactory(String emName, Map map) {
        return null;
    }

    @Override
    public EntityManagerFactory createContainerEntityManagerFactory(PersistenceUnitInfo info, Map map) {
        persistenceUnitInfo.put(info.getPersistenceUnitName(), info);
        TestClassTransformer testClassTransformer = new TestClassTransformer();
        info.addTransformer(testClassTransformer);

        TestEntityManagerFactory testEntityManagerFactory =
                new TestEntityManagerFactory(info.getProperties());
        Class[] targetInterfaces = javax.persistence.EntityManagerFactory.class.getInterfaces();
        Class[] proxyInterfaces = new Class[targetInterfaces.length + 1];  // include extra element for extensionClass
        boolean alreadyHasInterfaceClass = false;
        for (int interfaceIndex = 0; interfaceIndex < targetInterfaces.length; interfaceIndex++) {
            Class interfaceClass = targetInterfaces[interfaceIndex];
            if (interfaceClass.equals(javax.persistence.EntityManagerFactory.class)) {
                proxyInterfaces = targetInterfaces;                     // targetInterfaces already has all interfaces
                alreadyHasInterfaceClass = true;
                break;
            }
            proxyInterfaces[1 + interfaceIndex] = interfaceClass;
        }
        if (!alreadyHasInterfaceClass) {
            proxyInterfaces[0] = javax.persistence.EntityManagerFactory.class;
        }

        EntityManagerFactory proxyEntityManagerFactory = (EntityManagerFactory) Proxy.newProxyInstance(
                testEntityManagerFactory.getClass().getClassLoader(), //use the target classloader so the proxy has the same scope
                proxyInterfaces,
                testEntityManagerFactory
        );
        return proxyEntityManagerFactory;
    }

    @Override
    public void generateSchema(PersistenceUnitInfo persistenceUnitInfo, Map map) {

    }

    @Override
    public boolean generateSchema(String s, Map map) {
        return false;
    }

    @Override
    public ProviderUtil getProviderUtil() {
        return null;
    }

    public static void clearLastPersistenceUnitInfo() {
        persistenceUnitInfo.clear();
    }
}
