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package ca.allanwang.kau.adapters
import com.mikepenz.fastadapter.FastAdapter
import com.mikepenz.fastadapter.IAdapter
import com.mikepenz.fastadapter.IAdapterExtension
import com.mikepenz.fastadapter.IItem
import com.mikepenz.fastadapter.select.SelectExtension
/**
* Created by Allan Wang on 2017-11-08.
*/
/**
* Add kotlin's generic syntax to better support out types
*/
fun <Item : IItem<*, *>> fastAdapter(vararg adapter: IAdapter<out Item>) =
FastAdapter.with<Item, IAdapter<out Item>>(adapter.toList())!!
inline fun <reified T : IAdapterExtension<Item>, Item : IItem<*, *>> FastAdapter<Item>.getExtension(): T? =
getExtension(T::class.java)
/**
* Returns selection size, or -1 if selection is disabled
*/
inline val <Item : IItem<*, *>> IAdapter<Item>.selectionSize: Int
get() = fastAdapter.getExtension<SelectExtension<Item>, Item>()?.selections?.size ?: -1
inline val <Item : IItem<*, *>> IAdapter<Item>.selectedItems: Set<Item>
get() = fastAdapter.getExtension<SelectExtension<Item>, Item>()?.selectedItems ?: emptySet()
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