Package org.axonframework.migration

Class ConvertCommandHandlerConstructorToCompanionObject

java.lang.Object
org.openrewrite.Recipe
org.axonframework.migration.ConvertCommandHandlerConstructorToCompanionObject
All Implemented Interfaces:
Cloneable
public class ConvertCommandHandlerConstructorToCompanionObject extends org.openrewrite.Recipe
Kotlin counterpart to ConvertCommandHandlerConstructorToStaticMethod.

Rewrites every @CommandHandler constructor(...) on a Kotlin entity class into a @JvmStatic @CommandHandler fun handle(...) placed inside a companion object on the same class. The companion-object form is the Kotlin equivalent of the Java static factory shape that AF5's command-creates-entity handler discovery requires: the JVM bytecode produced by @JvmStatic matches the static method that Java aggregates emit, so a single AF5 framework path discovers both. 

 class Auction {                                    class Auction {
     @CommandHandler                             →     companion object {
     constructor(cmd: CreateAuction) {                       @JvmStatic
         AggregateLifecycle.apply(cmd)                       @CommandHandler
     }                                                       fun handle(cmd: CreateAuction) {
 }                                                               AggregateLifecycle.apply(cmd)
                                                            }
                                                        }
                                                    }
The recipe sub-parses a synthetic holder class containing the desired companion-object shape via KotlinParser, then grafts the parsed companion-object node into the original class body. Building the KObject-marked J.ClassDeclaration via the parser — rather than synthesizing it node-by-node — sidesteps the Kotlin-specific markers (KObject, the companion / object J.Modifiers) that the Kotlin printer needs to emit the right keywords.

Existing companion objects on the host class are NOT merged into; if the developer needs to consolidate, that's a follow-up cleanup.

Since:
5.1.1
Author:
Mateusz Nowak

  • Nested Class Summary

    Nested classes/interfaces inherited from class org.openrewrite.Recipe

    org.openrewrite.Recipe.Builder, org.openrewrite.Recipe.DelegatingRecipe

  • Field Summary

    Fields inherited from class org.openrewrite.Recipe

    contributors, examples, PANIC

  • Constructor Summary

    Constructors
    Constructor
    Description
    ConvertCommandHandlerConstructorToCompanionObject()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    String
    getDescription()
     
    String
    getDisplayName()
     
    org.openrewrite.TreeVisitor<?,org.openrewrite.ExecutionContext>
    getVisitor()
     

    Methods inherited from class org.openrewrite.Recipe

    addDataTable, builder, buildRecipeList, causesAnotherCycle, clone, createRecipeDescriptor, equals, getContributors, getDataTableDescriptors, getDescriptor, getEstimatedEffortPerOccurrence, getExamples, getInstanceName, getInstanceNameSuffix, getJacksonPolymorphicTypeTag, getMaintainers, getName, getRecipeList, getTags, hashCode, maxCycles, noop, onComplete, run, run, run, setContributors, setExamples, validate, validate, validateAll, validateAll, withOptions

    Methods inherited from class java.lang.Object

    finalize, getClass, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • ConvertCommandHandlerConstructorToCompanionObject

      public ConvertCommandHandlerConstructorToCompanionObject()

  • Method Details

    • getDisplayName

      public String getDisplayName()
      Specified by:
      getDisplayName in class org.openrewrite.Recipe

    • getDescription

      public String getDescription()
      Specified by:
      getDescription in class org.openrewrite.Recipe

    • getVisitor

      public org.openrewrite.TreeVisitor<?,org.openrewrite.ExecutionContext> getVisitor()
      Overrides:
      getVisitor in class org.openrewrite.Recipe