java.lang.Object
- org.springframework.batch.item.ItemStreamSupport
- - org.springframework.batch.item.support.AbstractItemStreamItemReader<T>
  - - org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader<T>
    - - org.springframework.batch.item.json.JsonItemReader<T>

Type Parameters:
T - the type of json objects to read
All Implemented Interfaces:
ResourceAwareItemReaderItemStream<T>, ItemReader<T>, ItemStream, ItemStreamReader<T>
```
public class JsonItemReader<T>
extends AbstractItemCountingItemStreamItemReader<T>
implements ResourceAwareItemReaderItemStream<T>
```
ItemStreamReader implementation that reads Json objects from a Resource having the following format:
[ { // JSON object }, { // JSON object } ]
The implementation is not thread-safe.
Since:
4.1
Author:
Mahmoud Ben Hassine

Constructor Summary
Constructors
Constructor Description
JsonItemReader(org.springframework.core.io.Resource resource, JsonObjectReader<T> jsonObjectReader)
Create a new JsonItemReader instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`doClose()`	Close the resources opened in `AbstractItemCountingItemStreamItemReader.doOpen()`.
`protected void`	`doOpen()`	Open resources necessary to start reading input.
`protected T`	`doRead()`	Read next item from input.
`void`	`setJsonObjectReader(JsonObjectReader<T> jsonObjectReader)`	Set the `JsonObjectReader` to use to read and map Json fragments to domain objects.
`void`	`setResource(org.springframework.core.io.Resource resource)`
`void`	`setStrict(boolean strict)`	In strict mode the reader will throw an exception on `AbstractItemCountingItemStreamItemReader.open(org.springframework.batch.item.ExecutionContext)` if the input resource does not exist.

Methods inherited from class org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader
close, getCurrentItemCount, isSaveState, jumpToItem, open, read, setCurrentItemCount, setMaxItemCount, setSaveState, update

Methods inherited from class org.springframework.batch.item.ItemStreamSupport
getExecutionContextKey, setExecutionContextName, setName

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.batch.item.ItemReader
read

Methods inherited from interface org.springframework.batch.item.ItemStream
close, open, update

- Constructor Detail
  - JsonItemReader
```
public JsonItemReader(org.springframework.core.io.Resource resource,
                      JsonObjectReader<T> jsonObjectReader)
```
    Create a new JsonItemReader instance.
    Parameters:
    resource - the input json resource
    jsonObjectReader - the json object reader to use
- Method Detail
  - setJsonObjectReader
```
public void setJsonObjectReader(JsonObjectReader<T> jsonObjectReader)
```
    Set the JsonObjectReader to use to read and map Json fragments to domain objects.
    Parameters:
    jsonObjectReader - the json object reader to use
  - setStrict
```
public void setStrict(boolean strict)
```
    In strict mode the reader will throw an exception on AbstractItemCountingItemStreamItemReader.open(org.springframework.batch.item.ExecutionContext) if the input resource does not exist.
    Parameters:
    strict - true by default
  - setResource
```
public void setResource(org.springframework.core.io.Resource resource)
```
    Specified by:
    setResource in interface ResourceAwareItemReaderItemStream<T>
  - doRead
```
protected T doRead()
            throws java.lang.Exception
```
    Description copied from class: AbstractItemCountingItemStreamItemReader
    Read next item from input.
    Specified by:
    doRead in class AbstractItemCountingItemStreamItemReader<T>
    Returns:
    an item or null if the data source is exhausted
    Throws:
    java.lang.Exception - Allows subclasses to throw checked exceptions for interpretation by the framework
  - doOpen
```
protected void doOpen()
               throws java.lang.Exception
```
    Description copied from class: AbstractItemCountingItemStreamItemReader
    Open resources necessary to start reading input.
    Specified by:
    doOpen in class AbstractItemCountingItemStreamItemReader<T>
    Throws:
    java.lang.Exception - Allows subclasses to throw checked exceptions for interpretation by the framework
  - doClose
```
protected void doClose()
                throws java.lang.Exception
```
    Description copied from class: AbstractItemCountingItemStreamItemReader
    Close the resources opened in AbstractItemCountingItemStreamItemReader.doOpen().
    Specified by:
    doClose in class AbstractItemCountingItemStreamItemReader<T>
    Throws:
    java.lang.Exception - Allows subclasses to throw checked exceptions for interpretation by the framework

Class JsonItemReader<T>

Constructor Summary

Method Summary

Methods inherited from class org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader

Methods inherited from class org.springframework.batch.item.ItemStreamSupport

Methods inherited from class java.lang.Object

Methods inherited from interface org.springframework.batch.item.ItemReader

Methods inherited from interface org.springframework.batch.item.ItemStream

Constructor Detail

JsonItemReader

Method Detail

setJsonObjectReader

setStrict

setResource

doRead

doOpen

doClose