72 lines
1.9 KiB
Plaintext
72 lines
1.9 KiB
Plaintext
// Version 1.2.31
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import java.io.Serializable
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import java.io.ByteArrayOutputStream
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import java.io.ByteArrayInputStream
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import java.io.ObjectOutputStream
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import java.io.ObjectInputStream
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fun <T : Serializable> deepCopy(obj: T?): T? {
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if (obj == null) return null
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val baos = ByteArrayOutputStream()
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val oos = ObjectOutputStream(baos)
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oos.writeObject(obj)
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oos.close()
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val bais = ByteArrayInputStream(baos.toByteArray())
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val ois = ObjectInputStream(bais)
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@Suppress("unchecked_cast")
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return ois.readObject() as T
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}
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class Person(
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val name: String,
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var age: Int,
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val sex: Char,
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var income: Double,
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var partner: Person?
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) : Serializable
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fun printDetails(p1: Person, p2: Person?, p3: Person, p4: Person?) {
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with (p3) {
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println("Name : $name")
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println("Age : $age")
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println("Sex : $sex")
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println("Income : $income")
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if (p4 == null) {
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println("Partner : None")
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}
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else {
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println("Partner :-")
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with (p4) {
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println(" Name : $name")
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println(" Age : $age")
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println(" Sex : $sex")
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println(" Income : $income")
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}
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}
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println("\nSame person as original '$name' == ${p1 === p3}")
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if (p4 != null) {
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println("Same person as original '${p2!!.name}' == ${p2 === p4}")
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}
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}
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println()
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}
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fun main(args: Array<String>) {
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var p1 = Person("John", 35, 'M', 50000.0, null)
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val p2 = Person("Jane", 32, 'F', 25000.0, p1)
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p1.partner = p2
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var p3 = deepCopy(p1)
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val p4 = p3!!.partner
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printDetails(p1, p2, p3, p4)
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println("..or, say, after 2 years have elapsed:-\n")
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with (p1) {
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age = 37
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income = 55000.0
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partner = null
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}
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p3 = deepCopy(p1)
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printDetails(p1, null, p3!!, null)
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}
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