Package org.springframework.batch.item.json

Class GsonJsonObjectReader<T>

java.lang.Object

org.springframework.batch.item.json.GsonJsonObjectReader<T>

Type Parameters:

T - type of the target object

All Implemented Interfaces:

JsonObjectReader<T>

public class GsonJsonObjectReader<T>
extends Object
implements JsonObjectReader<T>

Implementation of JsonObjectReader based on Google Gson.

Since:

4.1

Author:

Mahmoud Ben Hassine

Constructor Summary

Constructors

Constructor	Description
GsonJsonObjectReader(com.google.gson.Gson mapper, Class<? extends T> itemType)
GsonJsonObjectReader(Class<? extends T> itemType)	Create a new GsonJsonObjectReader instance.

Method Summary

Modifier and Type	Method	Description
void	close()	Close the input resource.
void	open(org.springframework.core.io.Resource resource)	Open the Json resource for reading.
T	read()	Read the next object in the Json resource if any.
void	setMapper(com.google.gson.Gson mapper)	Set the object mapper to use to map Json objects to domain objects.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

GsonJsonObjectReader

public GsonJsonObjectReader(Class<? extends T> itemType)

Create a new GsonJsonObjectReader instance.

Parameters:

itemType - the target item type

GsonJsonObjectReader

public GsonJsonObjectReader(com.google.gson.Gson mapper,
 Class<? extends T> itemType)

Method Details

setMapper

public void setMapper(com.google.gson.Gson mapper)

Set the object mapper to use to map Json objects to domain objects.

Parameters:

mapper - the object mapper to use

See Also:

• GsonJsonObjectReader(Gson, Class)

open

public void open(org.springframework.core.io.Resource resource)
          throws Exception

Description copied from interface: JsonObjectReader

Open the Json resource for reading.

Specified by:

open in interface JsonObjectReader<T>

Parameters:

resource - the input resource

Throws:

Exception - if unable to open the resource

read

@Nullable
public T read()
       throws Exception

Description copied from interface: JsonObjectReader

Read the next object in the Json resource if any.

Specified by:

read in interface JsonObjectReader<T>

Returns:

the next object or null if the resource is exhausted

Throws:

Exception - if unable to read the next object

close

public void close()
           throws Exception

Description copied from interface: JsonObjectReader

Close the input resource.

Specified by:

close in interface JsonObjectReader<T>

Throws:

Exception - if unable to close the input resource