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authorGilles Dubochet <gilles.dubochet@epfl.ch>2005-12-16 18:29:42 +0000
committerGilles Dubochet <gilles.dubochet@epfl.ch>2005-12-16 18:29:42 +0000
commitdf50e05006b43b007c2587549030d24b5c154398 (patch)
tree9edfb1fb5b8c04350a00c163cfcdb1fccd79e3aa /test/files/jvm/serialization.scala
parent17e2b1c2a6f69ba74e79c30d1e44195fe732e3e3 (diff)
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'test-nsc' has been moved to 'test'.
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+//############################################################################
+// Serialization
+//############################################################################
+// $Id$
+
+import java.lang.System;
+
+object EqualityTest {
+ def check[A, B](x: A, y: B): Unit = {
+ System.out.println("x = " + x);
+ System.out.println("y = " + y);
+ System.out.println(
+ "x equals y: " + (x equals y) + " - y equals x: " + (y equals x));
+ System.out.println();
+ }
+}
+
+object Serialize {
+ def write[A](o: A): Array[Byte] = { // throws Exception
+ val ba = new java.io.ByteArrayOutputStream(512);
+ val out = new java.io.ObjectOutputStream(ba);
+ out.writeObject(o);
+ out.close();
+ ba.toByteArray()
+ }
+ def read[A](buffer: Array[Byte]): A = { // throws Exception
+ 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 =
+ List.fromArray(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[All] = Serialize.read(Serialize.write(x1));
+ val y2: Option[All] = Serialize.read(Serialize.write(x2));
+ val y3: Array[Int] = Serialize.read(Serialize.write(x3));
+ val y4: Function[Int, Int] = Serialize.read(Serialize.write(x4));
+
+ System.out.println("x1 = " + x1);
+ System.out.println("y1 = " + y1);
+ System.out.println("x1 eq y1: " + (x1 eq y1) + " - y1 eq x1: " + (y1 eq x1));
+ System.out.println();
+ System.out.println("x2 = " + x2);
+ System.out.println("y2 = " + y2);
+ System.out.println("x2 eq y2: " + (x2 eq y2) + " - y2 eq x2: " + (y2 eq x2));
+ System.out.println();
+ System.out.println("x3 = " + arrayToString(x3));
+ System.out.println("y3 = " + arrayToString(y3));
+ System.out.println("arrayEquals(x3, y3): " + arrayEquals(x3, y3));
+ System.out.println();
+ System.out.println("x4 = <na>");
+ System.out.println("y4 = <na>");
+ System.out.println("x4(2): " + x4(2) + " - y4(2): " + y4(2));
+ System.out.println();
+ }
+ catch {
+ case e: Exception =>
+ e.printStackTrace();
+ System.out.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 = new BitSet(4, Array(2), true);
+
+ 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 =>
+ System.out.println("Error in Test2_immutable: " + e);
+ }
+}
+
+//############################################################################
+// Test classes in package "scala.collection.mutable"
+
+object Test3_mutable {
+ import scala.collection.mutable.{BitSet,HashMap,HashSet,LinkedList,
+ Queue,Stack};
+
+ val x1 = new HashMap[String, Int];
+ x1 ++= Test2_immutable.x1;
+
+ val x2 = new BitSet();
+ x2.set(0);
+ x2.set(8);
+ x2.set(9);
+
+ val x3 = new HashSet[String];
+ x3 ++= Test2_immutable.x1.map(p => p._1);
+
+ val x4 = new LinkedList[Int](2, null);
+ x4.append(new LinkedList(3, null));
+
+ val x5 = new Queue[Int];
+ x5 ++= Test2_immutable.x1.map(p => p._2);
+
+ val x6 = new Stack[Int];
+ x6 ++= x5;
+
+ try {
+ 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));
+
+ EqualityTest.check(x1, y1);
+ EqualityTest.check(x2, y2);
+ EqualityTest.check(x3, y3);
+ EqualityTest.check(x4, y4);
+ EqualityTest.check(x5, y5);
+ EqualityTest.check(x6, y6);
+ }
+ catch {
+ case e: Exception =>
+ System.out.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 (val 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 =>
+ System.out.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 =>
+ System.out.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 =>
+ System.out.println("Error in Test6: " + e);
+ }
+}
+
+//############################################################################
+// Test code
+
+object Test {
+ def main(args: Array[String]): Unit = {
+ Test1_scala;
+ Test2_immutable;
+ Test3_mutable;
+ Test4_xml;
+ Test5;
+ Test6
+ }
+}
+
+//############################################################################
+