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package overflowdb

import overflowdb.util.JIteratorCastingWrapper

package object traversal extends Implicits {
  implicit class JIterableOps[A](val jIterator: java.util.Iterator[A]) extends AnyVal {

    /** Wraps a java iterator into a scala iterator, and casts it's elements. This is faster than
      * `jIterator.asScala.map(_.asInstanceOf[B])` because 1) `.asScala` conversion is actually quite slow: multiple
      * method calls and a `match` without @switch 2) no additional `map` step that iterates and creates yet another
      * iterator
      */
    def toScalaAs[B]: Iterator[B] =
      new JIteratorCastingWrapper[B](jIterator)
  }

}