diff options
Diffstat (limited to 'src/library/scala/collection/mutable/WrappedArray.scala')
-rw-r--r-- | src/library/scala/collection/mutable/WrappedArray.scala | 71 |
1 files changed, 10 insertions, 61 deletions
diff --git a/src/library/scala/collection/mutable/WrappedArray.scala b/src/library/scala/collection/mutable/WrappedArray.scala index d0919c4357..0b5ebe7e9a 100644 --- a/src/library/scala/collection/mutable/WrappedArray.scala +++ b/src/library/scala/collection/mutable/WrappedArray.scala @@ -85,26 +85,12 @@ extends AbstractSeq[T] */ override protected[this] def newBuilder: Builder[T, WrappedArray[T]] = new WrappedArrayBuilder[T](elemTag) -} - -private[mutable] abstract class WrappedArrayImpl[T] extends WrappedArray[T] { - override def slice(from: Int, until: Int): WrappedArray[T] = { - val start = if (from < 0) 0 else from - if (until <= start || start >= repr.length) - return emptyImpl - val end = if (until > length) length else until - sliceImpl(start, end) - } - protected def emptyImpl: WrappedArray[T] - - protected def sliceImpl(from: Int, until: Int): WrappedArray[T] } /** A companion object used to create instances of `WrappedArray`. */ object WrappedArray { - import java.util // This is reused for all calls to empty. private val EmptyWrappedArray = new ofRef[AnyRef](new Array[AnyRef](0)) def empty[T <: AnyRef]: WrappedArray[T] = EmptyWrappedArray.asInstanceOf[WrappedArray[T]] @@ -138,17 +124,7 @@ object WrappedArray { def newBuilder[A]: Builder[A, IndexedSeq[A]] = new ArrayBuffer - private val emptyWrappedByte = new ofByte(new Array[Byte](0)) - private val emptyWrappedShort = new ofShort(new Array[Short](0)) - private val emptyWrappedInt = new ofInt(new Array[Int](0)) - private val emptyWrappedLong = new ofLong(new Array[Long](0)) - private val emptyWrappedFloat = new ofFloat(new Array[Float](0)) - private val emptyWrappedDouble = new ofDouble(new Array[Double](0)) - private val emptyWrappedUnit = new ofUnit(new Array[Unit](0)) - private val emptyWrappedChar = new ofChar(new Array[Char](0)) - private val emptyWrappedBoolean = new ofBoolean(new Array[Boolean](0)) - - final class ofRef[T <: AnyRef](val array: Array[T]) extends WrappedArrayImpl[T] with Serializable { + final class ofRef[T <: AnyRef](val array: Array[T]) extends WrappedArray[T] with Serializable { lazy val elemTag = ClassTag[T](array.getClass.getComponentType) def length: Int = array.length def apply(index: Int): T = array(index).asInstanceOf[T] @@ -158,11 +134,9 @@ object WrappedArray { case that: ofRef[_] => Arrays.equals(array.asInstanceOf[Array[AnyRef]], that.array.asInstanceOf[Array[AnyRef]]) case _ => super.equals(that) } - protected override def emptyImpl = new ofRef(util.Arrays.copyOf[T](array,0)) - protected override def sliceImpl(from: Int, until: Int) = new ofRef[T](util.Arrays.copyOfRange[T](array, from, until)) } - final class ofByte(val array: Array[Byte]) extends WrappedArrayImpl[Byte] with Serializable { + final class ofByte(val array: Array[Byte]) extends WrappedArray[Byte] with Serializable { def elemTag = ClassTag.Byte def length: Int = array.length def apply(index: Int): Byte = array(index) @@ -172,11 +146,9 @@ object WrappedArray { case that: ofByte => Arrays.equals(array, that.array) case _ => super.equals(that) } - protected override def emptyImpl = emptyWrappedByte - protected override def sliceImpl(from: Int, until: Int) = new ofByte(util.Arrays.copyOfRange(array, from, until)) } - final class ofShort(val array: Array[Short]) extends WrappedArrayImpl[Short] with Serializable { + final class ofShort(val array: Array[Short]) extends WrappedArray[Short] with Serializable { def elemTag = ClassTag.Short def length: Int = array.length def apply(index: Int): Short = array(index) @@ -186,11 +158,9 @@ object WrappedArray { case that: ofShort => Arrays.equals(array, that.array) case _ => super.equals(that) } - protected override def emptyImpl = emptyWrappedShort - protected override def sliceImpl(from: Int, until: Int) = new ofShort(util.Arrays.copyOfRange(array, from, until)) } - final class ofChar(val array: Array[Char]) extends WrappedArrayImpl[Char] with Serializable { + final class ofChar(val array: Array[Char]) extends WrappedArray[Char] with Serializable { def elemTag = ClassTag.Char def length: Int = array.length def apply(index: Int): Char = array(index) @@ -200,11 +170,9 @@ object WrappedArray { case that: ofChar => Arrays.equals(array, that.array) case _ => super.equals(that) } - protected override def emptyImpl = emptyWrappedChar - protected override def sliceImpl(from: Int, until: Int) = new ofChar(util.Arrays.copyOfRange(array, from, until)) } - final class ofInt(val array: Array[Int]) extends WrappedArrayImpl[Int] with Serializable { + final class ofInt(val array: Array[Int]) extends WrappedArray[Int] with Serializable { def elemTag = ClassTag.Int def length: Int = array.length def apply(index: Int): Int = array(index) @@ -214,11 +182,9 @@ object WrappedArray { case that: ofInt => Arrays.equals(array, that.array) case _ => super.equals(that) } - protected override def emptyImpl = emptyWrappedInt - protected override def sliceImpl(from: Int, until: Int) = new ofInt(util.Arrays.copyOfRange(array, from, until)) } - final class ofLong(val array: Array[Long]) extends WrappedArrayImpl[Long] with Serializable { + final class ofLong(val array: Array[Long]) extends WrappedArray[Long] with Serializable { def elemTag = ClassTag.Long def length: Int = array.length def apply(index: Int): Long = array(index) @@ -228,11 +194,9 @@ object WrappedArray { case that: ofLong => Arrays.equals(array, that.array) case _ => super.equals(that) } - protected override def emptyImpl = emptyWrappedLong - protected override def sliceImpl(from: Int, until: Int) = new ofLong(util.Arrays.copyOfRange(array, from, until)) } - final class ofFloat(val array: Array[Float]) extends WrappedArrayImpl[Float] with Serializable { + final class ofFloat(val array: Array[Float]) extends WrappedArray[Float] with Serializable { def elemTag = ClassTag.Float def length: Int = array.length def apply(index: Int): Float = array(index) @@ -242,11 +206,9 @@ object WrappedArray { case that: ofFloat => Arrays.equals(array, that.array) case _ => super.equals(that) } - protected override def emptyImpl = emptyWrappedFloat - protected override def sliceImpl(from: Int, until: Int) = new ofFloat(util.Arrays.copyOfRange(array, from, until)) } - final class ofDouble(val array: Array[Double]) extends WrappedArrayImpl[Double] with Serializable { + final class ofDouble(val array: Array[Double]) extends WrappedArray[Double] with Serializable { def elemTag = ClassTag.Double def length: Int = array.length def apply(index: Int): Double = array(index) @@ -256,11 +218,9 @@ object WrappedArray { case that: ofDouble => Arrays.equals(array, that.array) case _ => super.equals(that) } - protected override def emptyImpl = emptyWrappedDouble - protected override def sliceImpl(from: Int, until: Int) = new ofDouble(util.Arrays.copyOfRange(array, from, until)) } - final class ofBoolean(val array: Array[Boolean]) extends WrappedArrayImpl[Boolean] with Serializable { + final class ofBoolean(val array: Array[Boolean]) extends WrappedArray[Boolean] with Serializable { def elemTag = ClassTag.Boolean def length: Int = array.length def apply(index: Int): Boolean = array(index) @@ -270,11 +230,9 @@ object WrappedArray { case that: ofBoolean => Arrays.equals(array, that.array) case _ => super.equals(that) } - protected override def emptyImpl = emptyWrappedBoolean - protected override def sliceImpl(from: Int, until: Int) = new ofBoolean(util.Arrays.copyOfRange(array, from, until)) } - final class ofUnit(val array: Array[Unit]) extends WrappedArrayImpl[Unit] with Serializable { + final class ofUnit(val array: Array[Unit]) extends WrappedArray[Unit] with Serializable { def elemTag = ClassTag.Unit def length: Int = array.length def apply(index: Int): Unit = array(index) @@ -284,14 +242,5 @@ object WrappedArray { case that: ofUnit => array.length == that.array.length case _ => super.equals(that) } - protected override def emptyImpl = emptyWrappedUnit - protected override def sliceImpl(from: Int, until: Int) = { - // cant use - // new ofUnit(util.Arrays.copyOfRange[Unit](array, from, until)) - Unit is special and doesnt compile - // cant use util.Arrays.copyOfRange[Unit](repr, from, until) - Unit is special and doesnt compile - val res = new Array[Unit](until-from) - System.arraycopy(repr, from, res, 0, until-from) - new ofUnit(res) - } } } |