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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2002-2009, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
package scala.runtime
import compat.Platform
/**
* Arrays created by <code>new Array[T](length)</code> where <code>T</code>
* is a type variable.
*
* @author Martin Odersky
*/
@serializable
final class BoxedAnyArray[A](val length: Int) extends BoxedArray[A] {
private var boxed = new Array[AnyRef](length)
// private val hash = boxed.hashCode()
private var unboxed: AnyRef = null
private var elemClass: Class[_] = null
def apply(index: Int): A = synchronized {
if (unboxed eq null)
boxed(index)
else if (elemClass eq classOf[Int])
Int.box(unboxed.asInstanceOf[Array[Int]](index))
else if (elemClass eq classOf[Double])
Double.box(unboxed.asInstanceOf[Array[Double]](index))
else if (elemClass eq classOf[Float])
Float.box(unboxed.asInstanceOf[Array[Float]](index))
else if (elemClass eq classOf[Long])
Long.box(unboxed.asInstanceOf[Array[Long]](index))
else if (elemClass eq classOf[Char])
Char.box(unboxed.asInstanceOf[Array[Char]](index))
else if (elemClass eq classOf[Byte])
Byte.box(unboxed.asInstanceOf[Array[Byte]](index))
else if (elemClass eq classOf[Short])
Short.box(unboxed.asInstanceOf[Array[Short]](index))
else if (elemClass eq classOf[Boolean])
Boolean.box(unboxed.asInstanceOf[Array[Boolean]](index))
else
unboxed.asInstanceOf[Array[AnyRef]](index)
}.asInstanceOf[A]
def update(index: Int, _elem: A): Unit = synchronized {
val elem = _elem.asInstanceOf[AnyRef]
if (unboxed eq null)
boxed(index) = elem
else if (elemClass eq classOf[Int])
unboxed.asInstanceOf[Array[Int]](index) = Int.unbox(elem)
else if (elemClass eq classOf[Double])
unboxed.asInstanceOf[Array[Double]](index) = Double.unbox(elem)
else if (elemClass eq classOf[Float])
unboxed.asInstanceOf[Array[Float]](index) = Float.unbox(elem)
else if (elemClass eq classOf[Long])
unboxed.asInstanceOf[Array[Long]](index) = Long.unbox(elem)
else if (elemClass eq classOf[Char])
unboxed.asInstanceOf[Array[Char]](index) = Char.unbox(elem)
else if (elemClass eq classOf[Byte])
unboxed.asInstanceOf[Array[Byte]](index) = Byte.unbox(elem)
else if (elemClass eq classOf[Short])
unboxed.asInstanceOf[Array[Short]](index) = Short.unbox(elem)
else if (elemClass eq classOf[Boolean])
unboxed.asInstanceOf[Array[Boolean]](index) = Boolean.unbox(elem)
else
unboxed.asInstanceOf[Array[AnyRef]](index) = elem
}
def unbox(elemClass: Class[_]): AnyRef = synchronized {
if (unboxed eq null) {
this.elemClass = elemClass;
if (elemClass eq classOf[Int]) {
val newvalue = new Array[Int](length)
var i = 0
while (i < length) {
newvalue(i) = Int.unbox(boxed(i))
i += 1
}
unboxed = newvalue
} else if (elemClass eq classOf[Double]) {
val newvalue = new Array[Double](length)
var i = 0
while (i < length) {
newvalue(i) = Double.unbox(boxed(i))
i += 1
}
unboxed = newvalue;
} else if (elemClass eq classOf[Float]) {
val newvalue = new Array[Float](length)
var i = 0
while (i < length) {
newvalue(i) = Float.unbox(boxed(i))
i += 1
}
unboxed = newvalue;
} else if (elemClass eq classOf[Long]) {
val newvalue = new Array[Long](length)
var i = 0
while (i < length) {
newvalue(i) = Long.unbox(boxed(i))
i += 1
}
unboxed = newvalue;
} else if (elemClass eq classOf[Char]) {
val newvalue = new Array[Char](length)
var i = 0
while (i < length) {
newvalue(i) = Char.unbox(boxed(i))
i += 1
}
unboxed = newvalue
} else if (elemClass eq classOf[Byte]) {
val newvalue = new Array[Byte](length)
var i = 0
while (i < length) {
newvalue(i) = Byte.unbox(boxed(i))
i += 1
}
unboxed = newvalue;
} else if (elemClass eq classOf[Short]) {
val newvalue = new Array[Short](length)
var i = 0
while (i < length) {
newvalue(i) = Short.unbox(boxed(i))
i += 1
}
unboxed = newvalue;
} else if (elemClass eq classOf[Boolean]) {
val newvalue = new Array[Boolean](length)
var i = 0
while (i < length) {
newvalue(i) = Boolean.unbox(boxed(i))
i += 1
}
unboxed = newvalue;
} else if (elemClass == classOf[AnyRef]) {
unboxed = boxed
} else {
unboxed = Platform.createArray(elemClass, length)
if (elemClass.isArray) {
var i = 0
while (i < length) {
boxed(i) match {
case ba: BoxedArray[_] => boxed(i) = ba.unbox(elemClass.getComponentType())
case _ =>
}
i += 1
}
}
Platform.arraycopy(boxed, 0, unboxed, 0, length)
}
boxed = null
}
unboxed
}
/* !!! todo: deal with array equality
override def equals(other: Any): Boolean =
other.isInstanceOf[BoxedAnyArray[_]] && (this eq (other.asInstanceOf[BoxedAnyArray[_]])) ||
(if (unboxed eq null) boxed == other else unboxed == other)
override def hashCode(): Int = hash
*/
def value: AnyRef = {
if (unboxed eq null) throw new NotDefinedError("BoxedAnyArray.value")
unboxed
}
private def adapt(other: AnyRef): AnyRef =
if (this.unboxed eq null)
other match {
case that: BoxedAnyArray[_] =>
if (that.unboxed eq null) {
that.boxed
} else {
if (ScalaRunTime.isValueClass(that.elemClass)) unbox(that.elemClass);
that.unboxed
}
case that: BoxedArray[_] =>
adapt(that.value)
case that: Array[Int] =>
unbox(classOf[Int]); that
case that: Array[Double] =>
unbox(classOf[Double]); that
case that: Array[Float] =>
unbox(classOf[Float]); that
case that: Array[Long] =>
unbox(classOf[Long]); that
case that: Array[Char] =>
unbox(classOf[Char]); that
case that: Array[Short] =>
unbox(classOf[Short]); that
case that: Array[Byte] =>
unbox(classOf[Byte]); that
case that: Array[Boolean] =>
unbox(classOf[Boolean]); that
case _ =>
other
}
else
other match {
case that: BoxedAnyArray[_] =>
if (that.unboxed ne null) that.unboxed
else if (ScalaRunTime.isValueClass(this.elemClass)) that.unbox(this.elemClass)
else that.boxed
case that: BoxedArray[_] =>
adapt(that.value)
case _ =>
other
}
override def copyFrom(src: AnyRef, from: Int, to: Int, len: Int) {
val src1 = adapt(src)
Array.copy(src1, from, if (unboxed ne null) unboxed else boxed, to, len)
}
override def copyTo(from: Int, dest: AnyRef, to: Int, len: Int) {
var dest1 = adapt(dest)
Array.copy(if (unboxed ne null) unboxed else boxed, from, dest1, to, len)
}
final override def filter(p: A => Boolean): BoxedArray[A] = {
val (len, include) = countAndMemo(p)
val result = new BoxedAnyArray[A](len)
var i, j = 0
while (j < len) {
if (include(i)) { result(j) = this(i); j += 1 }
i += 1
}
result
}
}
|
