/*
    * Copyright 2006-2013 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.springframework.batch.core.explore.support;
  
  import org.springframework.batch.core.repository.dao.ExecutionContextDao;
  import org.springframework.batch.core.repository.dao.JobExecutionDao;
  import org.springframework.batch.core.repository.dao.JobInstanceDao;
  import org.springframework.batch.core.repository.dao.StepExecutionDao;
  import org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean;
  import org.springframework.beans.factory.FactoryBean;
  import org.springframework.beans.factory.InitializingBean;
  import org.springframework.util.Assert;
  
  /**
   * A {@link FactoryBean} that automates the creation of a
   * {@link SimpleJobExplorer} using in-memory DAO implementations.
   *
   * @author Dave Syer
   * @since 2.0
   */
  public class MapJobExplorerFactoryBean extends AbstractJobExplorerFactoryBean implements InitializingBean {
  
  	private MapJobRepositoryFactoryBean repositoryFactory;
  
  	/**
  	 * Create an instance with the provided {@link MapJobRepositoryFactoryBean}
  	 * as a source of Dao instances.
  	 * @param repositoryFactory
  	 */
  	public MapJobExplorerFactoryBean(MapJobRepositoryFactoryBean repositoryFactory) {
  		this.repositoryFactory = repositoryFactory;
  	}
  
  	/**
  	 * Create a factory with no {@link MapJobRepositoryFactoryBean}. It must be
  	 * injected as a property.
  	 */
  	public MapJobExplorerFactoryBean() {
  	}
  
  	/**
  	 * The repository factory that can be used to create daos for the explorer.
  	 *
  	 * @param repositoryFactory a {@link MapJobExplorerFactoryBean}
  	 */
  	public void setRepositoryFactory(MapJobRepositoryFactoryBean repositoryFactory) {
  		this.repositoryFactory = repositoryFactory;
  	}
  
  	/**
  	 * @throws Exception
  	 * @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
  	 */
  	@Override
  	public void afterPropertiesSet() throws Exception {
  		Assert.state(repositoryFactory != null, "A MapJobRepositoryFactoryBean must be provided");
  		repositoryFactory.afterPropertiesSet();
  	}
  
  	@Override
  	protected JobExecutionDao createJobExecutionDao() throws Exception {
  		return repositoryFactory.getJobExecutionDao();
  	}
  
  	@Override
  	protected JobInstanceDao createJobInstanceDao() throws Exception {
  		return repositoryFactory.getJobInstanceDao();
  	}
  
  	@Override
  	protected StepExecutionDao createStepExecutionDao() throws Exception {
  		return repositoryFactory.getStepExecutionDao();
  	}
  
  	@Override
  	protected ExecutionContextDao createExecutionContextDao() throws Exception {
  		return repositoryFactory.getExecutionContextDao();
  	}
  
  	@Override
  	public Object getObject() throws Exception {
  		return new SimpleJobExplorer(createJobInstanceDao(), createJobExecutionDao(), createStepExecutionDao(),
  				createExecutionContextDao());
  	}
  
 }