Error when trying to create custom Json to XML transformer in Mule - json

Question

I'm trying to create a custom Json to XML conversion in mule (custom transformer), its just a one to one direct mapping values, not a complex transformation.
here is my flow:
<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns:metadata="http://www.mulesoft.org/schema/mule/metadata" xmlns:json="http://www.mulesoft.org/schema/mule/json" xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
xmlns:spring="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/json http://www.mulesoft.org/schema/mule/json/current/mule-json.xsd
http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd">
<http:listener-config name="HTTP_Listener_Configuration" host="0.0.0.0" port="8081" basePath="/test" doc:name="HTTP Listener Configuration"/>
<flow name="test_finalFlow">
<http:listener config-ref="HTTP_Listener_Configuration" path="/" doc:name="HTTP"/>
<json:json-to-xml-transformer metadata:id="57c0cd3d-ece4-48fe-9adf-79fc36a31b12" doc:name="JSON to XML"/>
<logger level="INFO" doc:name="Logger"/>
</flow>
</mule>
I'm using theses files to configure my Json to XML component
jsonFile.json:
{
"inData": "value"
}
xml file: outData.xml
<?xml version='1.0' encoding='UTF-8'?>
<root>
<outData>someValue</outData>
</root>
setting the metadata:
right now when I deploy the application I do not have any problem,
but when I use postman to send a POST data with payload I got these errors:
and this is the full output of the console:
*******************************************************************************************************
* - - + APPLICATION + - - * - - + DOMAIN + - - * - - + STATUS + - - *
*******************************************************************************************************
* test_final * default * DEPLOYED *
*******************************************************************************************************
ERROR 2017-01-17 21:23:29,014 [[test_final].HTTP_Listener_Configuration.worker.01] org.mule.exception.DefaultMessagingExceptionStrategy:
********************************************************************************
Message : java.io.IOException: Illegal character: <i> (javax.xml.stream.XMLStreamException)
Payload : org.glassfish.grizzly.utils.BufferInputStream#526ed3db
Transformer : JsonToXml{this=6993c8df, name='JsonToString', ignoreBadInput=false, returnClass=SimpleDataType{type=java.lang.String, mimeType='text/xml', encoding='null'}, sourceTypes=[SimpleDataType{type=java.lang.String, mimeType='*/*', encoding='null'}, SimpleDataType{type=java.io.InputStream, mimeType='*/*', encoding='null'}, SimpleDataType{type=[B, mimeType='*/*', encoding='null'}, SimpleDataType{type=java.io.Reader, mimeType='*/*', encoding='null'}, SimpleDataType{type=java.net.URL, mimeType='*/*', encoding='null'}, SimpleDataType{type=java.io.File, mimeType='*/*', encoding='null'}]}
Element : /test_finalFlow/processors/0 # test_final:test_final.xml:13 (JSON to XML)
Element XML : <json:json-to-xml-transformer metadata:id="57c0cd3d-ece4-48fe-9adf-79fc36a31b12" doc:name="JSON to XML"></json:json-to-xml-transformer>
--------------------------------------------------------------------------------
Root Exception stack trace:
java.io.IOException: Illegal character: <i>
at de.odysseus.staxon.json.stream.impl.Yylex.yylex(Yylex.java:641)
at de.odysseus.staxon.json.stream.impl.Yylex.nextSymbol(Yylex.java:271)
at de.odysseus.staxon.json.stream.impl.JsonStreamSourceImpl.next(JsonStreamSourceImpl.java:107)
at de.odysseus.staxon.json.stream.impl.JsonStreamSourceImpl.peek(JsonStreamSourceImpl.java:250)
at de.odysseus.staxon.json.JsonXMLStreamReader.consume(JsonXMLStreamReader.java:128)
at de.odysseus.staxon.json.JsonXMLStreamReader.consume(JsonXMLStreamReader.java:161)
at de.odysseus.staxon.base.AbstractXMLStreamReader.initialize(AbstractXMLStreamReader.java:216)
at de.odysseus.staxon.json.JsonXMLStreamReader.<init>(JsonXMLStreamReader.java:65)
at de.odysseus.staxon.json.JsonXMLInputFactory.createXMLStreamReader(JsonXMLInputFactory.java:139)
at de.odysseus.staxon.json.JsonXMLInputFactory.createXMLStreamReader(JsonXMLInputFactory.java:120)
at de.odysseus.staxon.json.JsonXMLInputFactory.createXMLStreamReader(JsonXMLInputFactory.java:44)
at org.mule.module.json.transformers.JsonToXml.doTransform(JsonToXml.java:55)
at org.mule.transformer.AbstractTransformer.transform(AbstractTransformer.java:415)
at org.mule.transformer.AbstractTransformer.transform(AbstractTransformer.java:366)
at org.mule.DefaultMuleMessage.transformMessage(DefaultMuleMessage.java:1589)
at org.mule.DefaultMuleMessage.applyAllTransformers(DefaultMuleMessage.java:1488)
at org.mule.DefaultMuleMessage.applyTransformers(DefaultMuleMessage.java:1462)
at org.mule.DefaultMuleMessage.applyTransformers(DefaultMuleMessage.java:1454)
at org.mule.transformer.AbstractTransformer.process(AbstractTransformer.java:114)
at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:98)
at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:98)
at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
at org.mule.processor.AsyncInterceptingMessageProcessor.process(AsyncInterceptingMessageProcessor.java:102)
at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:98)
at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
at org.mule.construct.DynamicPipelineMessageProcessor.process(DynamicPipelineMessageProcessor.java:55)
at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
Any idea about what causing the error ?
java.io.IOException: Illegal character: i ?
Note:
I'm trying to create this custom transformer because I'm using just Mule server 3.8.1 CE right now , I'll get access soon to an enterprise edition version that's why I'm trying to deploy in a community edition server at this time.

Answer 1

please refer the below link for creating a custom json to xml transformer
https://docs.mulesoft.com/mule-user-guide/v/3.6/creating-custom-transformers