BATCH-2567: Allow to access MongoItemWriter.template from a subclass

JIRA: https://jira.spring.io/browse/BATCH-2567

Author: ninja-inc

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/data/MongoItemWriter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -76,6 +76,16 @@ public void setTemplate(MongoOperations template) {
 		this.template = template;
 	}
 
+	/**
+	 * Get the {@link MongoOperations} to be used to save items to be written.
+	 * This can be called by a subclass if necessary.
+	 * 
+	 * @return template the template implementation to be used.
+	 */
+	protected MongoOperations getTemplate() {
+		return template;
+	}
+
 	/**
 	 * Set the name of the Mongo collection to be written to.
 	 *