org.springframework.batch.item.NewItemIdentifier Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of spring-batch-infrastructure

The Spring Batch Infrastructure is a set of low-level components, interfaces and tools for batch processing applications and optimisations.

There is a newer version: 5.1.2

Show newest version

/*
 * Copyright 2006-2007 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.item;

/**
 * Strategy interface to distinguish a new item from one that has been processed
 * before and one that has not, e.g. by examining a message flag.
 * 
 * @author Dave Syer
 * 
 */
public interface NewItemIdentifier {

	/**
	 * Inspect the item and determine if it has never been processed before.
	 * The safest choice when the answer is indeterminate is 'false'.
	 * 
	 * @param item the current item.
	 * @return true if the item is known to have never been processed before.
	 */
	boolean isNew(Object item);

}