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WSO2 EI provides support for JavaScript Object Notation (JSON) payloads in messages. The following sections describe how to work with JSON in the EI:

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If you want to convert the JSON representation to XML before the mediation flow begins, you need to add the message builder and formatter shown below. Note that some data loss can occur during the JSON to XML to JSON conversion process.

<parameter name="passthruJsonBuilder">org.apache.synapse.commons.json.JsonBuilder</parameter>
<parameter name="passthruJsonFormatter">org.apache.synapse.commons.json.JsonFormatter</parameter>

The following builders and formatters can be enabled for JSON mapping in data services.

<parameter name="dsJsonBuilder">org.apache.axis2.json.gson.JsonBuilder</parameter>
<parameter name="dsJsonFormatter">org.apache.axis2.json.JSONMessageFormatter</parameter>

The following builders and formatters can also enabled. Note that this is necessary for compatibility with previous versions of the EI (WSO2 ESB):

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Parameter

Description

Default Value

synapse.commons.json.preserve.namespace

Preserves the namespace declarations in the JSON output in XML to JSON transformations.

false

synapse.commons.json.buildValidNCNames

Builds valid XML NCNames when building XML element names in XML to JSON transformations.

false

synapse.commons.json.output.autoPrimitive

Allows primitive types in the JSON output in XML to JSON transformations.

true

synapse.commons.json.output.namespaceSepChar

The namespace prefix separation character for the JSON output in XML to JSON transformations.

The default separation character is -

synapse.commons.json.output.enableNSDeclarations

Adds XML namespace declarations in the JSON output in XML to JSON transformations.

false

synapse.commons.json.output.disableAutoPrimitive.regex

Disables auto primitive conversion in XML to JSON transformations.

null

synapse.commons.json.output.jsonoutAutoArray

Sets the JSON output to an array element in XML to JSON transformations.

true

synapse.commons.json.output.jsonoutMultiplePI

Sets the JSON output to an xml multiple processing instruction in XML to JSON transformations.

true

synapse.commons.json.output.xmloutAutoArray

Sets the XML output to an array element in XML to JSON transformations.

true

synapse.commons.json.output.xmloutMultiplePI

Sets the XML output to an xml multiple processing instruction in XML to JSON transformations.

false

synapse.json.to.xml.processing.instruction.enabled

Enables adding processing instructions when performing JSON to XML conversions. For example, you can add processing instructions to identify array elements in JSON payloads with array indices (i.e., marked with "[ ]") and process them to XML.

Info
This property is available for WSO2 EI 6.1.0 via the WUM update 1716 released on the 10th of November 2017.

Anchor

	troubleshooting
	troubleshooting

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Tip
When adding this sample schema file to the Registry, specify the Media Type as application/json.

Code Block

language	java

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "properties": {
    "getQuote": {
      "type": "object",
      "properties": {
        "request": {
          "type": "object",
          "properties": {
            "symbol": {
              "type": "string"
            }
          },
          "required": [
            "symbol"
          ]
        }
      },
      "required": [
        "request"
      ]
    }
  },
  "required": [
    "getQuote"
  ]
}

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