Class JsonLineMapper

java.lang.Object

org.springframework.batch.infrastructure.item.file.mapping.JsonLineMapper

All Implemented Interfaces:

LineMapper<Map<String,Object>>

public class JsonLineMapper
extends Object
implements LineMapper<Map<String,Object>>

Interpret a line as a JSON object and parse it up to a Map. The line should be a standard JSON object, starting with "{" and ending with "}" and composed of name:value pairs separated by commas. Whitespace is ignored, e.g.

{ "foo" : "bar", "value" : 123 }

The values can also be JSON objects (which are converted to maps):

{ "foo": "bar", "map": { "one": 1, "two": 2}}

Author:

Dave Syer, Mahmoud Ben Hassine

Constructor Summary

Constructors

Constructor	Description
JsonLineMapper()	Create a new JsonLineMapper with a default JsonMapper.
JsonLineMapper(tools.jackson.databind.json.JsonMapper jsonMapper)	Create a new JsonLineMapper with the provided JsonMapper.

Method Summary

Modifier and Type	Method	Description
Map<String,Object>	mapLine(String line, int lineNumber)	Interpret the line as a Json object and create a Map from it.

Methods inherited from class Object

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

Constructor Details

JsonLineMapper

public JsonLineMapper()

Create a new JsonLineMapper with a default JsonMapper.

JsonLineMapper

public JsonLineMapper(tools.jackson.databind.json.JsonMapper jsonMapper)

Create a new JsonLineMapper with the provided JsonMapper.

Parameters:

jsonMapper - the json mapper to use

Since:

6.0

Method Details

mapLine

public Map<String,Object> mapLine(String line,
 int lineNumber)
                           throws Exception

Interpret the line as a Json object and create a Map from it.

Specified by:

mapLine in interface LineMapper<Map<String,Object>>

Parameters:

line - to be mapped

lineNumber - of the current line

Returns:

mapped object of type T

Throws:

Exception - if error occurred while parsing.

See Also:

• LineMapper.mapLine(String, int)