-
Notifications
You must be signed in to change notification settings - Fork 0
/
State.kt
62 lines (49 loc) · 1.27 KB
/
State.kt
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
package state
import javafx.scene.paint.Stop
/**
* @author ranaaditya
*
* State Design pattern
*
* Allow an object to alter its behaviour when its internal state changes.
* The object will appear to change its class
*/
class Context() {
private var gameState: State? = null
// constructor(state: State?) {
// gameState = state
// }
fun getState() = gameState
fun setState(state: State) { gameState = state }
}
interface State {
fun maintainState(context: Context)
}
class StartState: State {
override fun maintainState(context: Context) {
println("Game is in Start state")
context.setState(this)
}
}
class StopState: State {
override fun maintainState(context: Context) {
println("Game is in Stop state")
context.setState(this)
}
}
class RunningState: State {
override fun maintainState(context: Context) {
println("Game is in Running State")
context.setState(this)
}
}
fun main() {
val context = Context()
val startState = StartState()
startState.maintainState(context)
val runningState = RunningState()
runningState.maintainState(context)
val stopState = StopState()
stopState.maintainState(context)
println("Game has state ${context.getState()}")
}