spring-batch GeneratingTradeItemReader 源码
spring-batch GeneratingTradeItemReader 代码
文件路径：/spring-batch-samples/src/main/java/org/springframework/batch/sample/domain/trade/internal/GeneratingTradeItemReader.java
/*
* Copyright 2006-2019 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
*
* https://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.sample.domain.trade.internal;
import java.math.BigDecimal;
import org.springframework.batch.item.ItemReader;
import org.springframework.batch.sample.domain.trade.Trade;
import org.springframework.lang.Nullable;
/**
* Generates configurable number of {@link Trade} items.
*
* @author Robert Kasanicky
*/
public class GeneratingTradeItemReader implements ItemReader<Trade> {
private int limit = 1;
private int counter = 0;
@Nullable
@Override
public Trade read() throws Exception {
if (counter < limit) {
counter++;
return new Trade("isin" + counter, counter, new BigDecimal(counter), "customer" + counter);
}
return null;
}
/**
* @param limit number of items that will be generated (null returned on consecutive
* calls).
*/
public void setLimit(int limit) {
this.limit = limit;
}
public int getCounter() {
return counter;
}
public int getLimit() {
return limit;
}
public void resetCounter() {
this.counter = 0;
}
}
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