Conversion of string parameters to objects in declarative vs. scripted pipelines

[Ullrich Hafner]

In my workflow step I have a parameter of type hudson.model.Result

@DataBoundSetter
public void setRequiredResult(final Result requiredResult) {
    this.requiredResult = requiredResult;
}

When this parameter is set in the snipped generator, then the snipped generator creates the parameter as

discoverReferenceBuild requiredResult: 'FAILURE‘ 

This works for scripted pipelines, but not for declarative pipelines. In declarative pipelines I get an error:

WorkflowScript: 43: Expecting "class hudson.model.Result" for parameter "requiredResult" but got "SUCCESS" of type class java.lang.String instead @ line 43, column 67.

Is there a way to provide a hint for declarative pipelines so that the conversion of String to Result is handled automatically?

As a workaround I am now adding a String parameter as well, but this seems to be not elegant. 

PR: https://github.com/jenkinsci/forensics-api-plugin/pull/614

Issue: https://issues.jenkins.io/browse/JENKINS-75846

[Jesse Glick]

On Tue, Aug 12, 2025 at 5:06 AM Ullrich Hafner <ullrich...@gmail.com> wrote:

Is there a way to provide a hint for declarative pipelines so that the conversion of String to Result is handled automatically?

As a workaround I am now adding a String parameter as well, but this seems to be not elegant. 

I do not recall the details of why a `Result`-typed parameter works at all, but I would limit yourself to `String`. (Do not recall if `enum` works.)