初期化状況を管理するためのバケツクラスを追加

Author: k163377

src/main/kotlin/com/wrongwrong/mapk/core/ArgumentBucket.kt

@@ -0,0 +1,26 @@
+package com.wrongwrong.mapk.core
+
+class ArgumentBucket(
+    val bucket: Array<Any?>,
+    private var initializeStatus: Int,
+    private val initializeMask: List<Int>,
+    // clone時の再計算を避けるため1回で済むようにデフォルト値化
+    private val completionValue: Int = initializeMask.reduce { l, r -> l or r }
+) : Cloneable {
+    val isInitialized: Boolean get() = initializeStatus == completionValue
+    val notInitializedParameterIndexes: List<Int> get() = initializeMask.indices.filter {
+        initializeStatus and initializeMask[it] == 0
+    }
+
+    fun setArgument(argument: Any?, index: Int) {
+        // 先に入ったものを優先するため、初期化済みなら何もしない
+        if (initializeStatus and initializeMask[index] != 0) return
+
+        bucket[index] = argument
+        initializeStatus = initializeStatus or initializeMask[index]
+    }
+
+    public override fun clone(): ArgumentBucket {
+        return ArgumentBucket(bucket.copyOf(), initializeStatus, initializeMask, completionValue)
+    }
+}