Classes in Scala example #1

essential_scala_classes.scala

class Director(val firstName: String, val lastName: String, val yearOfBirth: Int) {
  def name(): String = firstName + " " + lastName
}

class Film(val name: String, val yearOfRelease: Int, val imdbRating: Double, val director: Director) {
  def directorsAge(): Int = this.yearOfRelease - director.yearOfBirth
  def isDirectedBy(d: Director) = if (d.name == this.director.name) true else false
  def copy(name: String = this.name, yearOfRelease: Int = this.yearOfRelease, imdbRating: Double = this.imdbRating, director: Director = this.director): Film = {
    new Film(name, yearOfRelease, imdbRating, director)
  } 
}

val eastwood = new Director("Clint", "Eastwood", 1930)
val mcTiernan = new Director("John", "McTiernan", 1951)
val nolan = new Director("Christopher", "Nolan", 1970)
val someBody = new Director("Just", "Some Body", 1990)
val memento = new Film("Memento", 2000, 8.5, nolan)
val darkKnight = new Film("Dark Knight", 2008, 9.0, nolan)
val inception = new Film("Inception", 2010, 8.8, nolan)
val highPlainsDrifter = new Film("High Plains Drifter", 1973, 7.7, eastwood)
val outlawJoseyWales = new Film("The Outlaw Josey Wales", 1976, 7.9, eastwood)
val unforgiven = new Film("Unforgiven", 1992, 8.3, eastwood)
val granTorino = new Film("Gran Torino", 2008, 8.2, eastwood)
val invictus = new Film("Invictus", 2009, 7.4, eastwood)
val predator = new Film("Predator", 1987, 7.9, mcTiernan)
val dieHard = new Film("Die Hard", 1988, 8.3, mcTiernan)
val huntForRedOctober = new Film("The Hunt for Red October", 1990, 7.6, mcTiernan)
val thomasCrownAffair = new Film("The Thomas Crown Affair", 1999, 6.8, mcTiernan)
val newception = inception.copy().copy().copy()

println(eastwood.yearOfBirth) // should be 1930
println(dieHard.director.name) // should be "John McTiernan"
println(invictus.isDirectedBy(nolan))
println(highPlainsDrifter.copy(name = "L'homme des hautes plaines"))
// returns Film("L'homme des hautes plaines", 1973, 7.7, /* etc */)
println(thomasCrownAffair.copy(yearOfRelease = 1968, director = new Director("Norman", "Jewison", 1926)))
// returns Film("The Thomas Crown Affair", 1926, /* etc */)

println(newception)
// returns a new copy of `inception`