JSON is a lightweight data interchange format that is human-readable and supports collections like arrays and maps. The Mule JSON transformer can transform between JSON and Java objects, with the Object to JSON transformer taking an object and returning JSON syntax without configuration, and the JSON to Object transformer populating a Java object from JSON by specifying the class name. An example demonstrates a JSON request being transformed to a Java order object, processed by business logic, then transformed back to JSON for the response.

1. Mule JSON Transformers

2. JSON Primer
• JavaScript Object Notation
- a lightweight datainterchange format
[ element1, element2, element3..... ]
• Human-Readable Syntax
• Supports
1. Collections
2. Maps
{
"name1":"value",
"name2":"value"
}

3. JSON Primer
• Supports the combining:
1. Collections
∙ employees[0]
∙ employees[1]
2. Maps
• Supporting more complex data

4. JSON Transformer
• Object to JSON
- receives an object and returns JSON syntax
- uses reflection (no configuration necessary)
• JSON to Object
- populates a Java object from a JSON structure
- requires at least the name of the class

5. JSON Example
1. JSON input enters with an order request
2. Order business logic exists in a java component
3. After processing, a response comes back with the tax
included

6. JSON Example
1. Java object representation of an order
2. Can be read by business logic
3. Fields match that of JSON request.

7. JSON Example

8. JSON Example
1. JSON is transformed to Order
- returnClass specified
2. Order transformed back to JSON

9. JSON Example
• XML to JAXB
- Uses the JAXB binding framework to serialize to xml
or in reverse to an object
- Counterpart exists at JAXB to XML
• XML to Object
- Utilizes Xstream to convert data to and from XML
and Java Objects
- Counterpart exists as Object to XML