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-rw-r--r--src/library/scalax/collection/mutable/ArrayBuffer.scala140
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diff --git a/src/library/scalax/collection/mutable/ArrayBuffer.scala b/src/library/scalax/collection/mutable/ArrayBuffer.scala
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-/* __ *\
-** ________ ___ / / ___ Scala API **
-** / __/ __// _ | / / / _ | (c) 2003-2009, LAMP/EPFL **
-** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
-** /____/\___/_/ |_/____/_/ | | **
-** |/ **
-\* */
-
-// $Id: ArrayBuffer.scala 15407 2008-06-20 09:26:36Z stepancheg $
-
-
-package scalax.collection.mutable
-
-import generic.{SequenceFactory, MutableVectorTemplate, Builder}
-
-/* Factory object for `ArrayBuffer` class */
-object ArrayBuffer extends SequenceFactory[ArrayBuffer] {
- def apply[A](args: A*): ArrayBuffer[A] = new ArrayBuffer[A] ++ args.asInstanceOf[Iterable[A]] // !@!
-}
-
-/** An implementation of the <code>Buffer</code> class using an array to
- * represent the assembled sequence internally. Append, update and random
- * access take constant time (amortized time). Prepends and removes are
- * linear in the buffer size.
- *
- * @author Matthias Zenger
- * @author Martin Odersky
- * @version 2.8
- */
-@serializable
-class ArrayBuffer[A](override protected val initialSize: Int)
- extends Buffer[A]
- with Vector[A]
- with MutableVectorTemplate[ArrayBuffer, A]
- with Builder[ArrayBuffer, A]
- with ResizableArray[A] {
-
- def this() = this(16)
-
- def clear() { reduceToSize(0) }
-
- override def newBuilder[B]: Builder[ArrayBuffer, B] = new ArrayBuffer[B]
-
- /** Appends a single element to this buffer and returns
- * the identity of the buffer. It takes constant time.
- *
- * @param elem the element to append.
- */
- def +=(elem: A) {
- ensureSize(size0 + 1)
- array(size0) = elem.asInstanceOf[AnyRef]
- size0 += 1
- }
-
- /** Appends a number of elements provided by an iterable object
- * via its <code>elements</code> method. The identity of the
- * buffer is returned.
- *
- * @param iter the iterfable object.
- * @return the updated buffer.
- */
- override def ++=(iter: collection.Iterable[A]) = iter match {
- case v: Vector[_] =>
- val n = v.length
- ensureSize(size0 + n)
- v.copyToArray(array.asInstanceOf[scala.Array[Any]], n)
- case _ =>
- super.++=(iter)
- }
-
- /** Prepends a single element to this buffer and return
- * the identity of the buffer. It takes time linear in
- * the buffer size.
- *
- * @param elem the element to append.
- * @return the updated buffer.
- */
- def +:(elem: A): this.type = {
- ensureSize(size0 + 1)
- copy(0, 1, size0)
- array(0) = elem.asInstanceOf[AnyRef]
- size0 += 1
- this
- }
-
- /** Prepends a number of elements provided by an iterable object
- * via its <code>elements</code> method. The identity of the
- * buffer is returned.
- *
- * @param iter the iterable object.
- * @return the updated buffer.
- */
- override def ++:(iter: Iterable[A]): this.type = { insertAll(0, iter); this }
-
- /** Inserts new elements at the index <code>n</code>. Opposed to method
- * <code>update</code>, this method will not replace an element with a
- * one. Instead, it will insert a new element at index <code>n</code>.
- *
- * @param n the index where a new element will be inserted.
- * @param iter the iterable object providing all elements to insert.
- * @throws Predef.IndexOutOfBoundsException if <code>n</code> is out of bounds.
- */
- def insertAll(n: Int, iter: Iterable[A]) {
- if ((n < 0) || (n > size0))
- throw new IndexOutOfBoundsException(n.toString)
- val xs = iter.elements.toList
- val len = xs.length
- ensureSize(size0 + len)
- copy(n, n + len, size0 - n)
- xs.copyToArray(array.asInstanceOf[scala.Array[Any]], n)
- size0 += len
- }
-
- /** Removes the element on a given index position. It takes time linear in
- * the buffer size.
- *
- * @param n the index which refers to the first element to delete.
- * @param count the number of elemenets to delete
- * @return the updated array buffer.
- * @throws Predef.IndexOutOfBoundsException if <code>n</code> is out of bounds.
- */
- def remove(n: Int, count: Int) {
- if ((n < 0) || (n >= size0))
- throw new IndexOutOfBoundsException(n.toString)
- copy(n + count, n, size0 - (n + count))
- size0 -= count
- }
-
- /** Return a clone of this buffer.
- *
- * @return an <code>ArrayBuffer</code> with the same elements.
- */
- override def clone(): Buffer[A] = new ArrayBuffer[A] ++ this
-
- def result: ArrayBuffer[A] = this
-
- /** Defines the prefix of the string representation.
- */
- override def stringPrefix: String = "ArrayBuffer"
-}