001/* 002 * Copyright 2006-2013 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.springframework.batch.item; 017 018import org.springframework.batch.item.util.ExecutionContextUserSupport; 019 020/** 021 * Empty method implementation of {@link ItemStream}. 022 * 023 * @author Dave Syer 024 * @author Dean de Bree 025 * 026 */ 027public abstract class ItemStreamSupport implements ItemStream { 028 029 private final ExecutionContextUserSupport executionContextUserSupport = new ExecutionContextUserSupport(); 030 031 /** 032 * No-op. 033 * @see org.springframework.batch.item.ItemStream#close() 034 */ 035 @Override 036 public void close() { 037 } 038 039 /** 040 * No-op. 041 * @see org.springframework.batch.item.ItemStream#open(ExecutionContext) 042 */ 043 @Override 044 public void open(ExecutionContext executionContext) { 045 } 046 047 /** 048 * Return empty {@link ExecutionContext}. 049 * @see org.springframework.batch.item.ItemStream#update(ExecutionContext) 050 */ 051 @Override 052 public void update(ExecutionContext executionContext) { 053 } 054 055 /** 056 * The name of the component which will be used as a stem for keys in the 057 * {@link ExecutionContext}. Subclasses should provide a default value, e.g. 058 * the short form of the class name. 059 * 060 * @param name the name for the component 061 */ 062 public void setName(String name) { 063 this.setExecutionContextName(name); 064 } 065 066 protected void setExecutionContextName(String name) { 067 executionContextUserSupport.setName(name); 068 } 069 070 public String getExecutionContextKey(String key) { 071 return executionContextUserSupport.getKey(key); 072 } 073 074}