RESOLVED - BATCH-863: introduce LineMapper interface to encapsulate string-to-item mapping

use DefaultLineMapper instead of PassThrough in customerFilterJob

spring-batch-samples/src/main/java/org/springframework/batch/sample/domain/trade/CompositeCustomerUpdateLineTokenizer.java

@@ -47,10 +47,6 @@ public class CompositeCustomerUpdateLineTokenizer extends StepExecutionListenerS
 			//line starts with A,U, or D, so it must be a customer operation.
 			return customerTokenizer.process(line);
 		}
-		else if(line.charAt(0) == 'S'){
-			//header record, ignore
-			return null;
-		}
 		else{
 			//If the line doesn't start with any of the characters above, it must obviously be invalid.
 			throw new IllegalArgumentException("Invalid line encountered for tokenizing: " + line);

spring-batch-samples/src/main/java/org/springframework/batch/sample/domain/trade/CustomerUpdateProcessor.java

@@ -13,8 +13,8 @@ import org.springframework.batch.item.ItemProcessor;
  */
 public class CustomerUpdateProcessor implements ItemProcessor<CustomerUpdate, CustomerUpdate>{
 
-	CustomerDao customerDao;
-	InvalidCustomerLogger invalidCustomerLogger;
+	private CustomerDao customerDao;
+	private InvalidCustomerLogger invalidCustomerLogger;
 	
 	public CustomerUpdate process(CustomerUpdate item) throws Exception {