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/*
 * Copyright 2002-2006 the original author or authors.
 *
 * 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.
 */
package org.unitils.database;

import org.springframework.beans.factory.FactoryBean;
import org.unitils.core.Unitils;

import javax.sql.DataSource;

/**
 * Spring FactoryBean that provides access to the datasource configured in unitils.
 * 
 * For example, you can define a bean in spring named 'dataSource' that connects to the test database as follows:
 * 

 *     <bean id="dataSource" class="org.unitils.database.UnitilsDataSourceFactoryBean"/>
 * 
 *
 * @author Tim Ducheyne
 * @author Filip Neven
 */
public class UnitilsDataSourceFactoryBean implements FactoryBean {


    /**
     * Gets the data source instance.
     *
     * @return The data source, not null
     */
    public Object getObject() throws Exception {
        DatabaseModule databaseModule = Unitils.getInstance().getModulesRepository().getModuleOfType(DatabaseModule.class);
        return databaseModule.getTransactionalDataSourceAndActivateTransactionIfNeeded(databaseModule.getTestObject());
    }


    /**
     * Gets the type of the object provided by this FactoryBean, i.e. DataSource
     *
     * @return The type, not null
     */
    public Class getObjectType() {
        return DataSource.class;
    }


    /**
     * @return true, this is a singleton
     */
    public boolean isSingleton() {
        return true;
    }
}