//############################################################################
// Serialization
//############################################################################
// $Id$
import java.lang.System
object EqualityTest {
def check[A, B](x: A, y: B) {
println("x = " + x)
println("y = " + y)
println("x equals y: " + (x equals y) + " - y equals x: " + (y equals x))
println()
}
}
object Serialize {
@throws(classOf[java.io.IOException])
def write[A](o: A): Array[Byte] = {
val ba = new java.io.ByteArrayOutputStream(512)
val out = new java.io.ObjectOutputStream(ba)
out.writeObject(o)
out.close()
ba.toByteArray()
}
@throws(classOf[java.io.IOException])
@throws(classOf[ClassNotFoundException])
def read[A](buffer: Array[Byte]): A = {
val in =
new java.io.ObjectInputStream(new java.io.ByteArrayInputStream(buffer))
in.readObject().asInstanceOf[A]
}
}
//############################################################################
// Test classes in package "scala"
@serializable
object Test1_scala {
private def arrayToString[A](arr: Array[A]): String =
arr.mkString("Array[",",","]")
private def arrayEquals[A, B](a1: Array[A], a2: Array[B]) =
(a1.length == a2.length) &&
(Iterator.range(0, a1.length) forall { i => a1(i) == a2(i) })
val x1 = Nil
val x2 = None
val x3 = Array(1, 2, 3)
val x4 = { x: Int => 2 * x }
try {
val y1: List[Nothing] = Serialize.read(Serialize.write(x1))
val y2: Option[Nothing] = Serialize.read(Serialize.write(x2))
val y3: Array[Int] = Serialize.read(Serialize.write(x3))
val y4: Function[Int, Int] = Serialize.read(Serialize.write(x4))
println("x1 = " + x1)
println("y1 = " + y1)
println("x1 eq y1: " + (x1 eq y1) + " - y1 eq x1: " + (y1 eq x1))
println
println("x2 = " + x2)
println("y2 = " + y2)
println("x2 eq y2: " + (x2 eq y2) + " - y2 eq x2: " + (y2 eq x2))
println
println("x3 = " + arrayToString(x3))
println("y3 = " + arrayToString(y3))
println("arrayEquals(x3, y3): " + arrayEquals(x3, y3))
println
println("x4 = <na>")
println("y4 = <na>")
println("x4(2): " + x4(2) + " - y4(2): " + y4(2))
println
}
catch {
case e: Exception =>
e.printStackTrace()
println("Error in Test1_scala: " + e)
}
}
//############################################################################
// Test classes in package "scala.collection.immutable"
@serializable
object Test2_immutable {
import scala.collection.immutable.{
BitSet, ListMap, ListSet, Queue, Stack, TreeSet, TreeMap}
val x1 = List(
Pair("buffers", 20),
Pair("layers", 2),
Pair("title", 3)
)
val x2 = new ListMap[String, Int]
.incl(Pair("buffers", 20))
.incl(Pair("layers", 2))
.incl(Pair("title", 3))
val x3 = {
val bs = new collection.mutable.BitSet()
bs += 2; bs += 3
bs.toImmutable
}
val x4 = new ListSet[Int]().incl(3).incl(5)
val x5 = new Queue("a", "b", "c")
val x6 = new Stack().push("a", "b", "c")
val x7 = new TreeMap[Int, String] + 42 -> "FortyTwo"
val x8 = new TreeSet[Int]().incl(2).incl(0)
try {
val y1: List[Pair[String, Int]] = Serialize.read(Serialize.write(x1))
val y2: ListMap[String, Int] = Serialize.read(Serialize.write(x2))
val y3: BitSet = Serialize.read(Serialize.write(x3))
val y4: ListSet[Int] = Serialize.read(Serialize.write(x4))
val y5: Queue[String] = Serialize.read(Serialize.write(x5))
val y6: Stack[String] = Serialize.read(Serialize.write(x6))
val y7: TreeMap[Int, String] = Serialize.read(Serialize.write(x7))
val y8: TreeSet[Int] = Serialize.read(Serialize.write(x8))
EqualityTest.check(x1, y1)
EqualityTest.check(x2, y2)
EqualityTest.check(x3, y3)
EqualityTest.check(x4, y4)
EqualityTest.check(x5, y5)
EqualityTest.check(x6, y6)
EqualityTest.check(x7, y7)
EqualityTest.check(x8, y8)
}
catch {
case e: Exception =>
println("Error in Test2_immutable: " + e)
throw e
}
}
//############################################################################
// Test classes in package "scala.collection.mutable"
object Test3_mutable {
import scala.collection.mutable.{
ArrayBuffer, BitSet, HashMap, HashSet, History, LinkedList, ListBuffer,
Publisher, Queue, RevertableHistory, Stack}
val x0 = new ArrayBuffer[String]
x0 ++= List("one", "two")
val x2 = new BitSet()
x2 += 0
x2 += 8
x2 += 9
val x1 = new HashMap[String, Int]
x1 ++= Test2_immutable.x1
val x3 = new HashSet[String]
x3 ++= Test2_immutable.x1.map(p => p._1)
@serializable
class Feed extends Publisher[String, Feed]
val x8 = new History[String, Feed]
val x4 = new LinkedList[Int](2, null)
x4.append(new LinkedList(3, null))
val x7 = new ListBuffer[String]
x7 ++= List("white", "black")
val x5 = new Queue[Int]
x5 ++= Test2_immutable.x1.map(p => p._2)
val x6 = new Stack[Int]
x6 ++= x5
try {
val y0: ArrayBuffer[String] = Serialize.read(Serialize.write(x0))
val y1: HashMap[String, Int] = Serialize.read(Serialize.write(x1))
val y2: BitSet = Serialize.read(Serialize.write(x2))
val y3: HashSet[String] = Serialize.read(Serialize.write(x3))
val y4: LinkedList[Int] = Serialize.read(Serialize.write(x4))
val y5: Queue[Int] = Serialize.read(Serialize.write(x5))
val y6: Stack[Int] = Serialize.read(Serialize.write(x6))
val y7: ListBuffer[String] = Serialize.read(Serialize.write(x7))
val y8: History[String, Feed] = Serialize.read(Serialize.write(x8))
EqualityTest.check(x0, y0)
EqualityTest.check(x1, y1)
EqualityTest.check(x2, y2)
EqualityTest.check(x3, y3)
EqualityTest.check(x4, y4)
EqualityTest.check(x5, y5)
EqualityTest.check(x6, y6)
EqualityTest.check(x7, y7)
//EqualityTest.check(x8, y8) //todo
}
catch {
case e: Exception =>
println("Error in Test3_mutable: " + e)
}
}
//############################################################################
// Test classes in package "scala.xml"
object Test4_xml {
import scala.xml.Elem
val x1 = <html><title>title</title><body></body></html>;
case class Person(name: String, age: Int)
class AddressBook(a: Person*) {
private val people: List[Person] = a.toList
def toXHTML =
<table cellpadding="2" cellspacing="0">
<tr>
<th>Last Name</th>
<th>First Name</th>
</tr>
{ for (p <- people) yield
<tr>
<td> { p.name } </td>
<td> { p.age.toString() } </td>
</tr> }
</table>;
}
val people = new AddressBook(
Person("Tom", 20),
Person("Bob", 22),
Person("James", 19))
val x2 =
<html>
<body>
{ people.toXHTML }
</body>
</html>;
try {
val y1: scala.xml.Elem = Serialize.read(Serialize.write(x1))
val y2: scala.xml.Elem = Serialize.read(Serialize.write(x2))
EqualityTest.check(x1, y1)
EqualityTest.check(x2, y2)
}
catch {
case e: Exception =>
println("Error in Test4_xml: " + e)
}
}
//############################################################################
// Test user-defined classes WITHOUT nesting
@serializable
class Person(_name: String) {
private var name = _name
override def toString() = name
override def equals(that: Any): Boolean =
that.isInstanceOf[Person] &&
(name == that.asInstanceOf[Person].name)
}
@serializable
class Employee(_name: String) {
private var name = _name
override def toString() = name
}
@serializable
object bob extends Employee("Bob")
object Test5 {
val x1 = new Person("Tim")
val x2 = bob
try {
val y1: Person = Serialize.read(Serialize.write(x1))
val y2: Employee = Serialize.read(Serialize.write(x2))
EqualityTest.check(x1, y1)
EqualityTest.check(x2, y2)
}
catch {
case e: Exception =>
println("Error in Test5: " + e)
}
}
//############################################################################
// Test user-defined classes WITH nesting
@serializable
object Test6 {
@serializable
object bill extends Employee("Bill") {
val x = paul
}
@serializable
object paul extends Person("Paul") {
val x = 4 // bill; => StackOverflowException !!!
}
val x1 = new Person("John")
val x2 = bill
val x3 = paul
try {
val y1: Person = Serialize.read(Serialize.write(x1))
val y2: Employee = Serialize.read(Serialize.write(x2))
val y3: Person = Serialize.read(Serialize.write(x3))
EqualityTest.check(x1, y1)
EqualityTest.check(x2, y2)
EqualityTest.check(x3, y3)
}
catch {
case e: Exception =>
println("Error in Test6: " + e)
}
}
//############################################################################
// Test code
object Test {
def main(args: Array[String]) {
Test1_scala
Test2_immutable
Test3_mutable
Test4_xml
Test5
Test6
}
}
//############################################################################