/
TupleFormatter.scala
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/
TupleFormatter.scala
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/*
* Archives Unleashed Toolkit (AUT):
* An open-source platform for analyzing web archives.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.archivesunleashed.matchbox
// scalastyle:off underscore.import
import shapeless._
import syntax.std.tuple._
// scalastyle:on underscore.import
import ops.tuple.FlatMapper
import ops.tuple.ToList
/** Tuple formatter utility. */
object TupleFormatter {
/** Borrowed from shapeless' flatten.scala example. */
trait LowPriorityFlatten extends Poly1 {
// scalastyle:off public.methods.have.type
implicit def default[T] = at[T](Tuple1(_))
}
/** Flattens nested tuples, taking an argument a tuple of any size. */
// scalastyle:off object.name
object flatten extends LowPriorityFlatten {
// scalastyle:on object.name
implicit def caseTuple[T <: Product](implicit fm: FlatMapper[T, flatten.type]) =
at[T](_.flatMap(flatten))
}
/** Transforms a tuple into a tab-delimited string, flattening any nesting,
* taking an argument a tuple of any size. */
// scalastyle:off object.name
object tabDelimit extends Poly1 {
// scalastyle:on object.name
implicit def caseTuple[T <: Product, Lub](implicit tl: ToList[T, Lub], fm: FlatMapper[T, flatten.type]) =
at[T](flatten(_).asInstanceOf[Product].productIterator.mkString("\t"))
}
// scalastyle:on public.methods.have.type
}