http://jonhnny-weslley.blogspot.com/2008/05/shadoop.html


package shadoop

import org.apache.hadoop.fs.Path
import org.apache.hadoop.io.{BooleanWritable, IntWritable, LongWritable, FloatWritable, Text, UTF8}

object SHadoop {

implicit def writable2boolean(value: BooleanWritable) = value.get
implicit def boolean2writable(value: Boolean) = new BooleanWritable(value)

implicit def writable2int(value: IntWritable) = value.get
implicit def int2writable(value: Int) = new IntWritable(value)

implicit def writable2long(value: LongWritable) = value.get
implicit def long2writable(value: Long) = new LongWritable(value)

implicit def writable2float(value: FloatWritable) = value.get
implicit def float2writable(value: Float) = new FloatWritable(value)

implicit def text2string(value: Text) = value.toString
implicit def string2text(value: String) = new Text(value)

implicit def uft82string(value: UTF8) = value.toString
implicit def string2utf8(value: String) = new UTF8(value)

implicit def path2string(value: Path) = value.toString
implicit def string2path(value: String) = new Path(value)

implicit def javaIterator2Iterator[A](value: java.util.Iterator[A]) = new Iterator[A] {
def hasNext = value.hasNext
def next = value.next
}

implicit def javaIterator2BooleanIterator(value: java.util.Iterator[BooleanWritable]) = new Iterator[Boolean] {
def hasNext = value.hasNext
def next = value.next.get
}

implicit def javaIterator2IntIterator(value: java.util.Iterator[IntWritable]) = new Iterator[Int] {
def hasNext = value.hasNext
def next = value.next.get
}

implicit def javaIterator2LongIterator(value: java.util.Iterator[LongWritable]) = new Iterator[Long] {
def hasNext = value.hasNext
def next = value.next.get
}

implicit def javaIterator2FloatIterator(value: java.util.Iterator[FloatWritable]) = new Iterator[Float] {
def hasNext = value.hasNext
def next = value.next.get
}

implicit def javaIterator2TextIterator(value: java.util.Iterator[Text]) = new Iterator[String] {
def hasNext = value.hasNext
def next = value.next.toString
}

implicit def javaIterator2UTF8Iterator(value: java.util.Iterator[UTF8]) = new Iterator[String] {
def hasNext = value.hasNext
def next = value.next.toString
}

}