Need a JSObject property to be bound to jsexported methods

[sammy44nts]

Hello!

Using Kotlin, I'm having trouble with the 'proper' way to define the JSObject property because Property constructor is private so I can't declare them that way.

I used

        JSObjectPropertiesMap(instance, Any::class.java).apply {
            put("id", instance.getId())
        }

to define a property in the JSObject.

I need the property to use getId() as getter and setId(value) as setter. Do you see a way to redefine JS object property id to bind it to the jsexported getter & setter at the instance creation time in the constructor?

[sammy44nts]

Found a solution for two way communication:

• getId() & setId(value) are not exported using jsexport anymore;
• At instance creation time, I retrieve the Kotlin member id:

  var id: String
    get() = getId()
    set(value) = setId(value)

• Set the constructor's properties:

  this::class.memberProperties.forEach {
  if (it.name == "id") {
    `this`.property(
      "\$\$_getid",
      object : JSFunction(context, "__NativeGetter__") {
        fun __NativeGetter__() = it.getter.call(this)
      })
    `this`.property(
      "\$\$_setid",
      object : JSFunction(context, "__NativeSetter__") {
        fun __NativeSetter__(v: JSValue) {
          if (it is KMutableProperty<*>) it.setter.call(this, "$v")
        }
      })
  }
  }

• Use of the following to redefine JSObject prototype:

  context.evaluateScript(
  "function InitClass(Class, props) {\n" +
  "    props.forEach(prop => {\n" +
  "        Object.defineProperty(Class.prototype, prop, {\n" +
  "                    get: function () {return this[\"\$\$_get\"+prop]()},\n" +
  "                    set: function (v) {this[\"\$\$_set\"+prop](v)}\n" +
  "                });\n" +
  "    });\n" +
  "}"
  )

• Call of context.evaluateScript("InitClass($className, ['id'])")