Example of jenkins code for Active Choice Reactive Parameter

Jenkinsfile_Active_Choice_Reactive_Parameter

properties([
    parameters([
        choice(choices: ['Development','QA'], description: 'Select Deployment Environment', name: 'DEPLOYMENT_ENVIRONMENT'),
        choice(choices: ['release','snapshot'], description: 'Select Nexus Repo', name: 'NEXUS_REPO'),
        [$class: 'CascadeChoiceParameter', 
        choiceType: 'PT_SINGLE_SELECT', 
        filterLength: 1, 
        filterable: false, 
        name: 'ARTIFACT_VERSION', 
        randomName: 'choice-parameter-7777777777777777', 
        referencedParameters: 'NEXUS_REPO', 
        script: [
            $class: 'GroovyScript', 
            fallbackScript: [
                classpath: [], 
                oldScript: '', 
                sandbox: true, 
                script: ''
                ], 
            script: [
                classpath: [], 
                oldScript: '',   
                sandbox: true, 
                script: '''import groovy.json.JsonSlurper
                           try{
                              if (NEXUS_REPO=="release") {
                               def nexus_url="https://nexus.mydomain.com/nexus/service/rest/v1/search?repository=release&group=org.common&name=common_artifact"

                               def response=nexus_url.toURL().text
                               def metadata = new JsonSlurper().parseText(response)
                               metadata["items"]["version"].reverse()
                           } else {
                               def nexus_url="https://nexus.mydomain.com/nexus/service/rest/v1/search?repository=snapshot&group=org.common&name=common_artifact"
                               
                               def response=nexus_url.toURL().text
                               def metadata = new JsonSlurper().parseText(response)
                               metadata["items"]["version"].reverse()
                           }
                           }catch(e){ return [e.toString()] }'''
                    ]
                ]
            ]
        ])

])
pipeline {
    agent any
	
    stages{    
		stage('Download Nexus Artifact') {
		    steps {    
              script {
                 // Code for Artifact download referencing parameter 'ARTIFACT_VERSION'
              }
            }
		} 
	    stage('Deploy to Azure') {
            steps { 
                // Code to deploy the artifact on Azure Springs App
	        }
        }
	} 
		
}