/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 WARRANTIESOR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.aries.tx.control.jdbc.local.impl;

import static org.osgi.service.jdbc.DataSourceFactory.JDBC_URL;
import static org.osgi.service.transaction.control.jdbc.JDBCConnectionProviderFactory.LOCAL_ENLISTMENT_ENABLED;
import static org.osgi.service.transaction.control.jdbc.JDBCConnectionProviderFactory.USE_DRIVER;
import static org.osgi.service.transaction.control.jdbc.JDBCConnectionProviderFactory.XA_ENLISTMENT_ENABLED;

import java.sql.Driver;
import java.sql.SQLException;
import java.util.Map;
import java.util.Properties;

import javax.sql.DataSource;
import javax.sql.XADataSource;

import org.apache.aries.tx.control.jdbc.common.impl.AbstractInternalJDBCConnectionProviderFactory;
import org.apache.aries.tx.control.jdbc.common.impl.AbstractJDBCConnectionProvider;
import org.apache.aries.tx.control.jdbc.common.impl.DriverDataSource;
import org.osgi.service.jdbc.DataSourceFactory;
import org.osgi.service.transaction.control.TransactionException;

public class JDBCConnectionProviderFactoryImpl extends AbstractInternalJDBCConnectionProviderFactory {

	@Override
	public AbstractJDBCConnectionProvider getProviderFor(DataSourceFactory dsf, Properties jdbcProperties,
			Map<String, Object> resourceProviderProperties) {

		checkEnlistment(resourceProviderProperties);

		DataSource unpooled;
		try {
			if (toBoolean(resourceProviderProperties, USE_DRIVER, false)) {
				unpooled = new DriverDataSource(dsf.createDriver(null), jdbcProperties.getProperty(JDBC_URL),
						jdbcProperties);
			} else {
				unpooled = dsf.createDataSource(jdbcProperties);
			}
		} catch (SQLException sqle) {
			throw new TransactionException("Unable to create the JDBC resource provider", sqle);
		}

		DataSource toUse = poolIfNecessary(resourceProviderProperties, unpooled);

		return new JDBCConnectionProviderImpl(toUse);
	}

	@Override
	public AbstractJDBCConnectionProvider getProviderFor(DataSource ds, Map<String, Object> resourceProviderProperties) {
		checkEnlistment(resourceProviderProperties);
		DataSource toUse = poolIfNecessary(resourceProviderProperties, ds);

		return new JDBCConnectionProviderImpl(toUse);
	}

	@Override
	public AbstractJDBCConnectionProvider getProviderFor(Driver driver, Properties jdbcProperties, 
			Map<String, Object> resourceProviderProperties) {
		checkEnlistment(resourceProviderProperties);
		DataSource toUse = poolIfNecessary(resourceProviderProperties, 
				new DriverDataSource(driver, jdbcProperties.getProperty(JDBC_URL), jdbcProperties));
		
		return new JDBCConnectionProviderImpl(toUse);
	}

	@Override
	public AbstractJDBCConnectionProvider getProviderFor(XADataSource ds, Map<String, Object> resourceProviderProperties) {
		checkEnlistment(resourceProviderProperties);
		
		DataSource unpooled;
		
		if(ds instanceof DataSource) {
			unpooled = (DataSource) ds;
		} else {
			throw new TransactionException("This resource Provider does not support XA transactions, and the supplied XADataSource is not a DataSource");
		}
		
		return new JDBCConnectionProviderImpl(poolIfNecessary(resourceProviderProperties, unpooled));
	}

	private void checkEnlistment(Map<String, Object> resourceProviderProperties) {
		if (toBoolean(resourceProviderProperties, XA_ENLISTMENT_ENABLED, false)) {
			throw new TransactionException("This Resource Provider does not support XA transactions");
		} else if (!toBoolean(resourceProviderProperties, LOCAL_ENLISTMENT_ENABLED, true)) {
			throw new TransactionException(
					"This Resource Provider always enlists in local transactions as it does not support XA");
		}
	}
}