Svetlana Isakova
36 lines
777 B
Kotlin
36 lines
777 B
Kotlin
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class JsonObject() {
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}
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class JsonArray() {
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}
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public trait Formatter<in IN: Any, out OUT: Any> {
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public fun format(source: IN?): OUT
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}
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public trait MultiFormatter <in IN: Any, out OUT: Any> {
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public fun format(source: Collection<IN>): OUT
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}
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public class Project() {
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}
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public trait JsonFormatter<in IN: Any>: Formatter<IN, JsonObject>, MultiFormatter<IN, JsonArray> {
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public override fun format(source: Collection<IN>): JsonArray {
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return JsonArray();
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}
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}
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public class ProjectJsonFormatter(): JsonFormatter<Project> {
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public override fun format(source: Project?): JsonObject {
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return JsonObject()
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}
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}
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fun box(): String {
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val formatter = ProjectJsonFormatter()
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return if (formatter.format(Project()) != null) "OK" else "fail"
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}
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