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class JobsListAdapter : ListAdapter<JobListItem, JobViewHolder>() { | |
override fun getItemViewType(position: Int): Int { | |
return getItem(position).ordinal() | |
} | |
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): JobViewHolder { | |
return when (viewType) { | |
Header.ordinal() -> HeaderViewHolder(...) | |
JobItem.ordinal() -> JobViewHolder(...) | |
else -> throw IllegalStateException() | |
} | |
} | |
} | |
sealed class JobListItem { | |
object Header : JobListItem() | |
data class JobItem(val payload: Payload) : JobListItem(){ | |
companion object | |
} | |
} | |
inline fun <reified T : Any> T.ordinal(): Int { | |
if (T::class.isSealed) { | |
return T::class.java.classes.indexOfFirst { sub -> sub == javaClass } | |
} | |
val klass = if (T::class.isCompanion) { | |
javaClass.declaringClass | |
} else { | |
javaClass | |
} | |
return klass.superclass?.classes?.indexOfFirst { it == klass } ?: -1 | |
} |
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