/*
    * Copyright 2013-2014 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.web.resource;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.TimeZone;
  
  import org.springframework.batch.admin.domain.JobExecutionInfo;
  import org.springframework.batch.admin.domain.JobInstanceInfoResource;
  import org.springframework.batch.admin.web.BatchJobInstancesController;
  import org.springframework.batch.admin.web.JobInstanceInfo;
  import org.springframework.batch.core.JobExecution;
  import org.springframework.hateoas.mvc.ResourceAssemblerSupport;
  
  
  /**
   * Resource assembler that builds the REST resource {@link JobInstanceInfoResource} out of domain model
   * {@link org.springframework.batch.admin.web.JobInstanceInfo}.
   * 
   * @author Ilayaperumal Gopinathan
   */
  public class JobInstanceInfoResourceAssembler extends
  		ResourceAssemblerSupport<JobInstanceInfo, JobInstanceInfoResource> {
  
  	JobExecutionInfoResourceAssembler jobExecutionInfoResourceAssembler = new JobExecutionInfoResourceAssembler();
  
  	public JobInstanceInfoResourceAssembler() {
  		super(BatchJobInstancesController.class, JobInstanceInfoResource.class);
  	}
  
  	@Override
  	public JobInstanceInfoResource toResource(JobInstanceInfo entity) {
  		return createResourceWithId(entity.getJobInstance().getId(), entity);
  	}
  
  	@Override
  	protected JobInstanceInfoResource instantiateResource(JobInstanceInfo entity) {
  		Collection<JobExecution> jobExecutions = entity.getJobExecutions();
  		Collection<JobExecutionInfo> infos = new ArrayList<JobExecutionInfo>(jobExecutions.size());
  
  		for (JobExecution jobExecution : jobExecutions) {
  			infos.add(new JobExecutionInfo(jobExecution, TimeZone.getTimeZone("UTC")));
  		}
  
  		return new JobInstanceInfoResource(entity.getJobInstance(),
  				jobExecutionInfoResourceAssembler.toResources(infos));
  	}
  }