1 files changed, 133 insertions, 0 deletions
diff --git a/javalib/src/main/scala/java/util/concurrent/TimeUnit.scala b/javalib/src/main/scala/java/util/concurrent/TimeUnit.scala
new file mode 100644
index 0000000..a77dbfc
--- /dev/null
+++ b/javalib/src/main/scala/java/util/concurrent/TimeUnit.scala
@@ -0,0 +1,133 @@
+package java.util.concurrent
+
+abstract class TimeUnit private (_index: Int,
+    _name: String) extends java.io.Serializable {
+
+  def convert(a: Long, u: TimeUnit): Long
+
+  def toNanos(a: Long): Long
+  def toMicros(a: Long): Long
+  def toMillis(a: Long): Long
+  def toSeconds(a: Long): Long
+  def toMinutes(a: Long): Long
+  def toHours(a: Long): Long
+  def toDays(a: Long): Long
+
+  // not used
+  //private[concurrent] def excessNanos(a: Long, b: Long): Int
+
+  def name(): String = _name
+  def ordinal(): Int = _index
+
+  // methods that cannot be implemented
+  //def timedWait(arg1: AnyRef, arg2: Long): Unit
+  //def timedJoin(arg1: Thread, arg2: Long): Unit
+  //def sleep(arg1: Long): Unit
+
+  override def toString() = name()
+}
+
+object TimeUnit {
+  final val NANOSECONDS: TimeUnit = new TimeUnit(0, "NANOSECONDS") {
+    def convert(a: Long, u: TimeUnit): Long = u.toNanos(a)
+    def toNanos(a: Long): Long   = a
+    def toMicros(a: Long): Long  = a / (C1/C0)
+    def toMillis(a: Long): Long  = a / (C2/C0)
+    def toSeconds(a: Long): Long = a / (C3/C0)
+    def toMinutes(a: Long): Long = a / (C4/C0)
+    def toHours(a: Long): Long   = a / (C5/C0)
+    def toDays(a: Long): Long    = a / (C6/C0)
+  }
+
+  final val MICROSECONDS: TimeUnit = new TimeUnit(1, "MICROSECONDS") {
+    def convert(a: Long, u: TimeUnit): Long = u.toMicros(a)
+    def toNanos(a: Long): Long   = x(a, C1/C0, MAX/(C1/C0))
+    def toMicros(a: Long): Long  = a
+    def toMillis(a: Long): Long  = a / (C2/C1)
+    def toSeconds(a: Long): Long = a / (C3/C1)
+    def toMinutes(a: Long): Long = a / (C4/C1)
+    def toHours(a: Long): Long   = a / (C5/C1)
+    def toDays(a: Long): Long    = a / (C6/C1)
+  }
+
+  final val MILLISECONDS: TimeUnit = new TimeUnit(2, "MILLISECONDS") {
+    def convert(a: Long, u: TimeUnit): Long = u.toMillis(a)
+    def toNanos(a: Long): Long   = x(a, C2/C0, MAX/(C2/C0))
+    def toMicros(a: Long): Long  = x(a, C2/C1, MAX/(C2/C1))
+    def toMillis(a: Long): Long  = a
+    def toSeconds(a: Long): Long = a / (C3/C2)
+    def toMinutes(a: Long): Long = a / (C4/C2)
+    def toHours(a: Long): Long   = a / (C5/C2)
+    def toDays(a: Long): Long    = a / (C6/C2)
+  }
+
+  final val SECONDS: TimeUnit = new TimeUnit(3, "SECONDS") {
+    def convert(a: Long, u: TimeUnit): Long = u.toSeconds(a)
+    def toNanos(a: Long): Long   = x(a, C3/C0, MAX/(C3/C0))
+    def toMicros(a: Long): Long  = x(a, C3/C1, MAX/(C3/C1))
+    def toMillis(a: Long): Long  = x(a, C3/C2, MAX/(C3/C2))
+    def toSeconds(a: Long): Long = a
+    def toMinutes(a: Long): Long = a / (C4/C3)
+    def toHours(a: Long): Long   = a / (C5/C3)
+    def toDays(a: Long): Long    = a / (C6/C3)
+  }
+
+  final val MINUTES: TimeUnit = new TimeUnit(4, "MINUTES") {
+    def convert(a: Long, u: TimeUnit): Long = u.toMinutes(a)
+    def toNanos(a: Long): Long   = x(a, C4/C0, MAX/(C4/C0))
+    def toMicros(a: Long): Long  = x(a, C4/C1, MAX/(C4/C1))
+    def toMillis(a: Long): Long  = x(a, C4/C2, MAX/(C4/C2))
+    def toSeconds(a: Long): Long = x(a, C4/C3, MAX/(C4/C3))
+    def toMinutes(a: Long): Long = a
+    def toHours(a: Long): Long   = a / (C5/C4)
+    def toDays(a: Long): Long    = a / (C6/C4)
+  }
+
+  final val HOURS: TimeUnit = new TimeUnit(5, "HOURS") {
+    def convert(a: Long, u: TimeUnit): Long = u.toHours(a)
+    def toNanos(a: Long): Long   = x(a, C5/C0, MAX/(C5/C0))
+    def toMicros(a: Long): Long  = x(a, C5/C1, MAX/(C5/C1))
+    def toMillis(a: Long): Long  = x(a, C5/C2, MAX/(C5/C2))
+    def toSeconds(a: Long): Long = x(a, C5/C3, MAX/(C5/C3))
+    def toMinutes(a: Long): Long = x(a, C5/C4, MAX/(C5/C4))
+    def toHours(a: Long): Long   = a
+    def toDays(a: Long): Long    = a / (C6/C5)
+  }
+
+  final val DAYS: TimeUnit = new TimeUnit(6, "DAYS") {
+    def convert(a: Long, u: TimeUnit): Long = u.toDays(a)
+    def toNanos(a: Long): Long   = x(a, C6/C0, MAX/(C6/C0))
+    def toMicros(a: Long): Long  = x(a, C6/C1, MAX/(C6/C1))
+    def toMillis(a: Long): Long  = x(a, C6/C2, MAX/(C6/C2))
+    def toSeconds(a: Long): Long = x(a, C6/C3, MAX/(C6/C3))
+    def toMinutes(a: Long): Long = x(a, C6/C4, MAX/(C6/C4))
+    def toHours(a: Long): Long   = x(a, C6/C5, MAX/(C6/C5))
+    def toDays(a: Long): Long    = a
+  }
+
+  private[this] val _values: Array[TimeUnit] =
+    Array(NANOSECONDS, MICROSECONDS, MILLISECONDS, SECONDS, MINUTES, HOURS, DAYS)
+
+  // deliberately without type ascription to make them compile-time constants
+  private final val C0 = 1L
+  private final val C1 = C0 * 1000L
+  private final val C2 = C1 * 1000L
+  private final val C3 = C2 * 1000L
+  private final val C4 = C3 * 60L
+  private final val C5 = C4 * 60L
+  private final val C6 = C5 * 24L
+  private final val MAX = Long.MaxValue
+
+  def values(): Array[TimeUnit] = _values.clone()
+
+  def valueOf(name: String): TimeUnit = {
+    _values.find(_.name == name).getOrElse(
+        throw new IllegalArgumentException("No enum const TimeUnit." + name))
+  }
+
+  private def x(a: Long, b: Long, max: Long): Long = {
+    if (a > max) MAX
+    else if (a < -max) -MAX
+    else a * b
+  }
+}