How to extract JSON Array From json in mulesoft - web-services

Question

I am getting xml output then i am converting that xml into json object.the format is given below.
{
"SOAP-ENV:Envelope": {
"#xmlns:SOAP-ENV": "http://schemas.xmlsoap.org/soap/envelope/",
"#xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance",
"#xmlns:xsd": "http://www.w3.org/2001/XMLSchema",
"SOAP-ENV:Body": {
"rpc:TestExampleResponse": {
"#xmlns:rpc": "http://Test.com/asi/",
"TestMessage": {
"listOfTESTS": {
"#xmlns:xmlns": "http://www.Test.com/xml/TEST",
"TESTS": [{
"id": "1",
"lastSyncDate": "12/16/2015 07:06:38",
"listOfTESTsyncrealtimeChild": null
}, {
"id": "2",
"lastSyncDate": "12/16/2015 07:06:38",
"listOfTESTsyncrealtimeChild": null
}
]
}
}
}
}
}
}
i want to extract Test array from JSON Output in Mulesoft.I dont know how to extract that array in mulesoft.Thanks in advance

Answer 1

You can use Dataweave (Transform Message component in Anypoint Studio)
(Mule EE)
Take a look to the documentation:
https://docs.mulesoft.com/mule-user-guide/v/3.7/using-dataweave-in-studio
Sample script for your input:
%dw 1.0
%input payload application/json
%output application/json
---
TESTS: payload."SOAP-ENV:Envelope"."SOAP-ENV:Body"."rpc:TestExampleResponse".TestMessage.listOfTESTS.TESTS map ((tEST , indexOfTEST) -> {
id: tEST.id,
lastSyncDate: tEST.lastSyncDate,
listOfTESTsyncrealtimeChild: tEST.listOfTESTsyncrealtimeChild
})
Output when using %output application/json:
{
"TESTS": [
{
"id": "1",
"lastSyncDate": "12/16/2015 07:06:38",
"listOfTESTsyncrealtimeChild": null
},
{
"id": "2",
"lastSyncDate": "12/16/2015 07:06:38",
"listOfTESTsyncrealtimeChild": null
}
]
}
Output when using %output application/java:
{TESTS=[{id=1, lastSyncDate=12/16/2015 07:06:38, listOfTESTsyncrealtimeChild=null}, {id=2, lastSyncDate=12/16/2015 07:06:38, listOfTESTsyncrealtimeChild=null}]}

Answer 2

You can write a custom transformer like below. This transformer uses Jackson (com.fasterxml.jackson) dependency.
The transformer returns a list of strings where each string represents an element of your TESTS array.
public class JsonArrayExtractor extends AbstractTransformer {
private final ObjectMapper mapper = new ObjectMapper();
private final String testsNodeJsonPointer = "/SOAP-ENV:Envelope/SOAP-ENV:Body/rpc:TestExampleResponse/TestMessage/listOfTESTS/TESTS";
public JsonArrayExtractor() {
registerSourceType(DataTypeFactory.STRING);
}
#Override
protected Object doTransform(Object src, String enc) throws TransformerException {
String payload = Objects.toString(src);
JsonNode root;
try {
root = mapper.readTree(payload);
} catch (IOException e) {
throw new TransformerException(this, e);
}
List<String> testsList = new ArrayList<>();
JsonNode testsNode = root.at(JsonPointer.valueOf(testsNodeJsonPointer));
if (testsNode instanceof ArrayNode) {
ArrayNode testsArrayNode = (ArrayNode) testsNode;
for (JsonNode test : testsArrayNode) {
testsList.add(test.toString());
}
}
return testsList;
}
}
And you can use the above transformer in your flow as below.
<custom-transformer class="org.ram.JsonArrayExtractor" doc:name="extractTestsArray"/>