ArrayMap.kt

@file:Suppress("UNCHECKED_CAST", "NOTHING_TO_INLINE", "OVERRIDE_BY_INLINE")

package kore.savable

class ArrayMap(@PublishedApi internal val keyList:List<String>, @PublishedApi internal val valueList:List<Any?>):Map<String, Any?>{
    class KeySet(val keyList:List<String>):Set<String>{
        override inline val size:Int get() = keyList.size
        override inline fun isEmpty():Boolean = keyList.isEmpty()
        override inline fun contains(element:String):Boolean = keyList.indexOf(element) != -1
        override inline fun iterator():Iterator<String> = keyList.iterator()
        override inline fun containsAll(elements:Collection<String>):Boolean = elements.all{contains(it)}
    }
    class EntrySet(val keyList:List<String>, val valueList:List<Any?>):Set<Map.Entry<String, Any?>>{
        class Entry(override val key:String, override val value:Any?):Map.Entry<String, Any?>
        @PublishedApi internal var _entryList:List<Map.Entry<String, Any?>>? = null
        @PublishedApi internal inline val entryList:List<Map.Entry<String, Any?>> get() = _entryList ?: ArrayList<Map.Entry<String, Any?>>(size).also{list->
            var i = 0
            while(i < size){
                list.add(Entry(keyList[i], valueList[i]))
                i++
            }
            _entryList = list
        }
        override inline val size:Int get() = keyList.size
        override inline fun isEmpty():Boolean = keyList.isEmpty()
        override inline fun contains(element:Map.Entry<String, Any?>):Boolean = entryList.indexOf(element) != -1
        override inline fun iterator():Iterator<Map.Entry<String, Any?>> = entryList.iterator()
        override inline fun containsAll(elements:Collection<Map.Entry<String, Any?>>):Boolean = elements.all{contains(it)}
    }
    override inline val size:Int get() = keyList.size
    override val keys:Set<String> = KeySet(keyList)
    override val values:Collection<Any?> = valueList
    @PublishedApi internal var _entrySet:EntrySet? = null
    override inline val entries:Set<Map.Entry<String, Any?>> get() = _entrySet ?: EntrySet(keyList, valueList).also{_entrySet = it}
    override fun isEmpty():Boolean = size == 0
    override fun containsKey(key:String):Boolean = keyList.indexOf(key) != -1
    override fun containsValue(value:Any?):Boolean = valueList.indexOf(value) != -1
    override fun get(key:String):Any?{
        val i = keyList.indexOf(key)
        return if(i == -1) null else valueList[i]
    }
}