Parsing JSON on Jenkins Pipeline (groovy) - json

Question

I created a method as shown online:
#NonCPS
def parseJsonString(String jsonString) {
def lazyMap = new JsonSlurper().parseText(jsonString)
// JsonSlurper returns a non-serializable LazyMap, so copy it into a regular map before returning
def m = [:]
m.putAll(lazyMap)
return m
}
But I get the following error:
ERROR: java.io.NotSerializableException: groovy.json.internal.LazyMap
To work around this, I have to create an entire method to perform an entire step. For instance, in a method, I would do the same as above, parse the information I want, and finally return it as a string.
This, however, presents another issue, especially if you wrap this method inside a withCredentials, which would then require another withCredentials.

Answer 1

I finally find a BETTER solution!
readJSON() method from the Jenkins "Pipeline Utility Steps" plugin as shown here:
https://jenkins.io/doc/pipeline/steps/pipeline-utility-steps/#readjson-read-json-from-files-in-the-workspace
Here is a sample where we can finally ditch that ugly GROOVY JSONPARSE crap.
node() {
stage("checkout") {
def jsonString = '{"name":"katone","age":5}'
def jsonObj = readJSON text: jsonString
assert jsonObj['name'] == 'katone' // this is a comparison. It returns true
sh "echo ${jsonObj.name}" // prints out katone
sh "echo ${jsonObj.age}" // prints out 5
}
}