io.hydrosphere.mist.lib.LocalData.scala Maven / Gradle / Ivy
package io.hydrosphere.mist.lib
case class LocalDataColumn[T](name: String, data: List[T])
class LocalData(private val columnData: List[LocalDataColumn[_]]) {
def withColumn(localDataColumn: LocalDataColumn[_]): LocalData = {
LocalData(columnData :+ localDataColumn)
}
def column(columnName: String): Option[LocalDataColumn[_]] = {
columnData.find(_.name == columnName)
}
def columns: List[String] = columnData.map(_.name)
def toMapList: List[Map[String, _]] = {
val rowCount = (for (column <- columnData) yield column.data.length).max
for (rowNumber <- List.range(0, rowCount))
yield (for (column <- columnData) yield column.name -> column.data(rowNumber)).toMap
}
override def toString: String = {
def rowSeparator(colSizes: List[Int]): String = {
colSizes.map("-" * _).mkString("+", "+", "+")
}
def rowFormat(items: List[String], colSizes: List[Int]): String = {
items.zip(colSizes).map((t) => if (t._2 == 0) "" else s"%${t._2}s".format(t._1)).mkString("|", "|", "|")
}
var stringParts = List.empty[String]
val rowCount = (for (column <- columnData) yield column.data.length).max
val sizes = columnData.map(column => (List(column.name) ++ column.data.map(_.toString)).map(_.length).max + 1)
stringParts :+= rowSeparator(sizes)
stringParts :+= rowFormat(columns, sizes)
stringParts :+= rowSeparator(sizes)
for (rowNumber <- List.range(0, rowCount)) {
val row = columnData.map { (column) =>
if (column.data.length <= rowNumber) {
"–"
} else {
column.data(rowNumber).toString
}
}
stringParts :+= rowFormat(row, sizes)
}
stringParts :+= rowSeparator(sizes)
stringParts.mkString("\n")
}
}
object LocalData {
def apply(columns: LocalDataColumn[_]*): LocalData = {
new LocalData(columns.toList)
}
def apply(columns: List[LocalDataColumn[_]]): LocalData = new LocalData(columns)
}