spring-batch JsonObjectReader 源码
spring-batch JsonObjectReader 代码
文件路径：/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/json/JsonObjectReader.java
/*
* Copyright 2018 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.item.json;
import org.springframework.core.io.Resource;
import org.springframework.lang.Nullable;
/**
* Strategy interface for Json readers. Implementations are expected to use a streaming
* API in order to read Json objects one at a time.
*
* @param <T> type of the target object
* @author Mahmoud Ben Hassine
* @since 4.1
*/
public interface JsonObjectReader<T> {
/**
* Open the Json resource for reading.
* @param resource the input resource
* @throws Exception if unable to open the resource
*/
default void open(Resource resource) throws Exception {
}
/**
* Read the next object in the Json resource if any.
* @return the next object or {@code null} if the resource is exhausted
* @throws Exception if unable to read the next object
*/
@Nullable
T read() throws Exception;
/**
* Close the input resource.
* @throws Exception if unable to close the input resource
*/
default void close() throws Exception {
}
}
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