jvmAndroidMain.org.luaj.vm2.lib.jse.JavaMember.kt Maven / Gradle / Ivy
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* Copyright (c) 2011 Luaj.org. All rights reserved.
*
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* of this software and associated documentation files (the "Software"), to deal
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* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
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package org.luaj.vm2.lib.jse
import org.luaj.vm2.Varargs
import org.luaj.vm2.internal.*
import org.luaj.vm2.lib.VarArgFunction
import org.luaj.vm2.lib.jse.CoerceLuaToJava.Coercion
import kotlin.math.*
/**
* Java method or constructor.
*
*
* Primarily handles argument coercion for parameter lists including scoring of compatibility and
* java varargs handling.
*
*
* This class is not used directly.
* It is an abstract base class for [JavaConstructor] and [JavaMethod].
* @see JavaConstructor
*
* @see JavaMethod
*
* @see CoerceJavaToLua
*
* @see CoerceLuaToJava
*/
internal abstract class JavaMember protected constructor(params: Array>, modifiers: Int) : VarArgFunction() {
private val isvarargs = modifiers and METHOD_MODIFIERS_VARARGS != 0
@kotlin.jvm.JvmField
val fixedargs: Array =
Array(if (isvarargs) params.size - 1 else params.size) { CoerceLuaToJava.getCoercion(params[it]) }
@kotlin.jvm.JvmField
val varargs: Coercion? = if (isvarargs) CoerceLuaToJava.getCoercion(params[params.size - 1]) else null
fun score(args: Varargs): Int {
val n = args.narg()
var s = if (n > fixedargs.size) CoerceLuaToJava.SCORE_WRONG_TYPE * (n - fixedargs.size) else 0
for (j in fixedargs.indices) s += fixedargs[j].score(args.arg(j + 1))
if (varargs != null) {
for (k in fixedargs.size until n) s += varargs.score(args.arg(k + 1))
}
return s
}
protected fun convertArgs(args: Varargs): Array {
val a: Array = if (varargs == null) {
Array(fixedargs.size) { fixedargs[it].coerce(args.arg(it + 1)) }
} else {
val n = max(fixedargs.size, args.narg())
arrayOfNulls(n).also { a ->
for (i in fixedargs.indices) a[i] = fixedargs[i].coerce(args.arg(i + 1))
for (i in fixedargs.size until n) a[i] = varargs.coerce(args.arg(i + 1))
}
}
return a as Array
}
companion object {
const val METHOD_MODIFIERS_VARARGS = 0x80
}
}