Details
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Type:
Bug
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Status: Resolved (View Workflow)
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Priority:
Minor
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Resolution: Fixed
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Component/s: pipeline-utility-steps-plugin
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Labels:None
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Similar Issues:
Description
The documentation of readJson suggests that readJson returns plain Java objects (like readYaml does), but they are of type net.sf.json.JSON and some members of that are not whitelisted, so it is painful to work with...
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Activity
As JSON content can be read by YAML parsers, I switched to readYaml
This has been fixed with release 2.4.0 released about a year ago. Sorry for not closing the issue (to keep the plugin backward-compatible, you need to add `returnPojo: true` to the call).
Tobias Gruetzmacher
added a comment - This has been fixed with release 2.4.0 released about a year ago. Sorry for not closing the issue (to keep the plugin backward-compatible, you need to add `returnPojo: true` to the call). I had issue with latest Jenkins version. I will try to submit a MVCE.
Demo pipeline :
def printValue(name, value) {
echo "${name} = ${value}"
echo "${name}.class = ${value.getClass()}"
}
def printStruct(array) {
printValue "array", array
def object = array[0]
printValue "object", object
def id = object.id
printValue "id", id
def content = object.content
printValue "content", content
printValue "null ?", content == null
}
def text = """
[
{
id: 1,
content: null
}
]
"""
pipeline {
agent any
stages {
stage('Main') {
parallel {
stage('readJSON') {
steps {
script {
printStruct(readJSON(text: text))
}
}
}
stage('readYaml') {
steps {
script {
printStruct(readYaml(text: text))
}
}
}
}
}
}
}
Outputs :
- readJSON
array = [[id:1, content:null]] array.class = class net.sf.json.JSONArray object = [id:1, content:null] object.class = class net.sf.json.JSONObject id = 1 id.class = class java.lang.Integer content = null content.class = class net.sf.json.JSONNull null ? = false
- readYaml
array = [[id:1, content:null]] array.class = class java.util.ArrayList object = [id:1, content:null] object.class = class java.util.LinkedHashMap id = 1 id.class = class java.lang.Integer content = null content.class = class org.codehaus.groovy.runtime.NullObject null ? = true
Of course. For backward compatibility, legacy JSON objects are returned if you omit the returnPojo: true option.
Tobias Gruetzmacher
added a comment - Of course. For backward compatibility, legacy JSON objects are returned if you omit the returnPojo: true option. 
readJSON uses json library released last time 8 years ago - which in IT world means abandoned software
Why groovy.json.JsonParser is not used?
https://stackoverflow.com/questions/19424490/a-not-null-string-with-literal-value-null-not-handled-correctly-bug-in-json
no answer for that - but readJSON is impacted for example it treats JSON value null as "null" string
People recommending abandoning json-lib 5 years ago