/*
    * Copyright 2009-2010 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.admin.integration;
  
  import java.io.File;
  
  import org.springframework.batch.core.Job;
  import org.springframework.batch.core.JobParameters;
  import org.springframework.batch.core.JobParametersBuilder;
  import org.springframework.batch.core.launch.NoSuchJobException;
  import org.springframework.batch.integration.launch.JobLaunchRequest;
  import org.springframework.beans.factory.InitializingBean;
  import org.springframework.integration.annotation.MessageEndpoint;
  import org.springframework.integration.annotation.ServiceActivator;
  import org.springframework.util.Assert;
  
  /**
   * Adapt a {@link File} to a {@link JobLaunchRequest} with a job parameter
   * <code>input.file</code> equal to the path of the file.
   * 
   * @author Dave Syer
   * 
   */
  @MessageEndpoint
  public class FileToJobLaunchRequestAdapter implements InitializingBean {
  
  	private Job job;
  
  	public void setJob(Job job) {
  		this.job = job;
  	}
  
  	public void afterPropertiesSet() throws Exception {
  		Assert.notNull(job, "A Job must be provided");
  	}
  
  	@ServiceActivator
  	public JobLaunchRequest adapt(File file) throws NoSuchJobException {
  
  		String fileName = file.getAbsolutePath();
  
  		if (!fileName.startsWith("/")) {
  			fileName = "/" + fileName;
  		}
  
  		fileName = "file://" + fileName;
  
  		JobParameters jobParameters = new JobParametersBuilder().addString(
  				"input.file", fileName).toJobParameters();
  
  		if (job.getJobParametersIncrementer() != null) {
  			jobParameters = job.getJobParametersIncrementer().getNext(jobParameters);
  		}
  
  		return new JobLaunchRequest(job, jobParameters);
  
  	}
  
  }