/*
   Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program 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 General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

package com.mysql.clusterj.core.metadata;

import com.mysql.clusterj.ClusterJException;
import com.mysql.clusterj.ClusterJHelper;
import com.mysql.clusterj.ClusterJUserException;
import com.mysql.clusterj.core.spi.DomainTypeHandlerFactory;
import com.mysql.clusterj.core.spi.DomainTypeHandler;
import com.mysql.clusterj.core.spi.ValueHandlerFactory;
import com.mysql.clusterj.core.store.Dictionary;
import com.mysql.clusterj.core.util.I18NHelper;
import com.mysql.clusterj.core.util.Logger;
import com.mysql.clusterj.core.util.LoggerFactoryService;
import java.util.List;

/**
 *
 */
public class DomainTypeHandlerFactoryImpl implements DomainTypeHandlerFactory {

    /** My message translator */
    static final I18NHelper local = I18NHelper.getInstance(DomainTypeHandlerFactoryImpl.class);

    /** My logger */
    static final Logger logger = LoggerFactoryService.getFactory().getInstance(DomainTypeHandlerFactoryImpl.class);

    /** My class loader */
    static final ClassLoader DOMAIN_TYPE_HANDLER_FACTORY_IMPL_CLASS_LOADER =
            DomainTypeHandlerFactoryImpl.class.getClassLoader();

    protected static List<DomainTypeHandlerFactory> domainTypeHandlerFactories;
    protected static StringBuffer domainTypeHandlerFactoryErrorMessages = new StringBuffer();
    static {
        domainTypeHandlerFactories = ClusterJHelper.getServiceInstances(
                DomainTypeHandlerFactory.class, 
                DOMAIN_TYPE_HANDLER_FACTORY_IMPL_CLASS_LOADER,
                domainTypeHandlerFactoryErrorMessages);
        logger.info("Found " + domainTypeHandlerFactories.size() + " DomainTypeHandlerFactories");
        for (DomainTypeHandlerFactory factory: domainTypeHandlerFactories) {
            logger.info(factory.toString());
        }
    }

    public <T> DomainTypeHandler<T> createDomainTypeHandler(Class<T> domainClass, Dictionary dictionary,
            ValueHandlerFactory valueHandlerFactory) {
        DomainTypeHandler<T> handler = null;
        StringBuffer errorMessages = new StringBuffer();
        for (DomainTypeHandlerFactory factory: domainTypeHandlerFactories) {
            try {
                errorMessages.append("Trying factory ");
                errorMessages.append(factory.toString());
                errorMessages.append("\n");
                handler = factory.createDomainTypeHandler(domainClass, dictionary, valueHandlerFactory);
                if (handler != null) {
                    return handler;
                }
            } catch (Exception ex) {
                errorMessages.append("Caught exception: ");
                errorMessages.append(ex.toString());
                errorMessages.append("\n");
            }
        }
        // none of the factories can handle it; default to the standard factory

        try {
            errorMessages.append("Trying standard factory com.mysql.clusterj.core.metadata.DomainTypeHandlerImpl.\n");
            handler = new DomainTypeHandlerImpl<T>(domainClass, dictionary, valueHandlerFactory);
            return handler;
        } catch (ClusterJException e) {
            errorMessages.append(e.toString());
            throw e;
        } catch (Exception e) {
            errorMessages.append(e.toString());
            throw new ClusterJUserException(errorMessages.toString(), e);
        } finally {
            // if handler is null, there may be a problem with the schema, so remove it from the local dictionary
            if (handler == null) {
                String tableName = DomainTypeHandlerImpl.getTableName(domainClass);
                if (tableName != null) {
                    logger.info(local.message("MSG_Removing_Schema", tableName, domainClass.getName()));
                    dictionary.removeCachedTable(tableName);                    
                }
            }
        }
    }

}
