How to convert ManagedCursorStreamProvider to JSOn

问题:

How to convert ManagedCursorStreamProvider to Json object in mule. I have written a java method which takes the Json Object as input

Request Payload:
{ a: "one",
b : "two"}

Invoke static

arg0 : payload

Java Function called using invoke static

public static func(JsonObject json){
}

I am getting the following error:

Expected arguments are [com.google.gson.JsonObject jsonObject] and invocation was attempted with arguments [org.mule.runtime.core.internal.streaming.bytes.ManagedCursorStreamProvider arg0]. No suitable transformation was found to match the expected type for the parameter [jsonObject].

UPDATE: I have updated my java method to accept String as input.

"Cannot coerce Object { encoding: UTF-8, mediaType: application/json; charset=UTF-8, mimeType: application/json, raw: org.mule.weave.v2.el.SeekableCursorStream@868075a } (org.mule.weave.v2.el.MuleTypedValue@7c0c5e89) to String

1| arg0 : vars.req as String
          ^^^^^^^^^^^^^^^^^^
Trace:
  at main (line: 1, column: 8)" evaluating expression: "arg0 : vars.req as String".

回答1:

Mule doesn't know how to convert to a GSON JsonObject. You can use DataWeave to transform it into a Java map. Alternatively, you can change the argument of the Java method to String and Mule will transparently convert the stream to a String. Be sure to use the latest version of the Java module.

If you want to convert to a custom type of object you will need to implement it yourself in Java.