deserialize notifs from file

Author: samgst-amazon

plugins/core/jetbrains-community/src/software/aws/toolkits/jetbrains/core/notifications/NotificationPollingService.kt

@@ -36,10 +36,9 @@ interface NotificationPollingService {
 }
 
 object NotificationFileValidator : RemoteResolveParser {
-    private val mapper = jacksonObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
     override fun canBeParsed(data: InputStream): Boolean {
         return try {
-            mapper.readValue<NotificationsList>(data)
+            NotificationMapperUtil.mapper.readValue<NotificationsList>(data)
             true
         } catch (e: Exception) {
             false

plugins/core/jetbrains-community/src/software/aws/toolkits/jetbrains/core/notifications/ProcessNotificationsBase.kt

@@ -3,19 +3,30 @@
 
 package software.aws.toolkits.jetbrains.core.notifications
 
+import com.fasterxml.jackson.databind.DeserializationFeature
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
 import com.intellij.openapi.project.Project
+import software.aws.toolkits.core.utils.inputStream
+import java.io.InputStream
 import java.nio.file.Path
 
+object NotificationMapperUtil{
+    val mapper = jacksonObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
+}
+
 class ProcessNotificationsBase {
     init {
         NotificationPollingServiceImpl.getInstance().addObserver { path ->
             getNotificationsFromFile(path)
         }
     }
 
-    fun getNotificationsFromFile(path: Path) {
-        // TODO: returns a notification list
-    }
+    fun getNotificationsFromFile(path: Path): NotificationsList =
+        path.inputStream().use { data ->
+            NotificationMapperUtil.mapper.readValue<NotificationsList>(data)
+        }
+
 
     fun retrieveStartupAndEmergencyNotifications() {
         // TODO: separates notifications into startup and emergency