feat: create event deserializer

Author: AndreaGiulianelli

src/env/application/presenter/event/serialization/EventDeserializerImpl.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2023. Smart Operating Block
+ *
+ * Use of this source code is governed by an MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ */
+
+package application.presenter.event.serialization;
+
+import application.presenter.event.model.Event;
+import application.presenter.event.model.medicaltechnology.MedicalTechnologyEvent;
+import application.presenter.event.model.medicaltechnology.payload.MedicalTechnologyUsagePayload;
+import application.presenter.event.model.roomevent.RoomEvent;
+import application.presenter.event.model.roomevent.payload.HumidityPayload;
+import application.presenter.event.model.roomevent.payload.LuminosityPayload;
+import application.presenter.event.model.roomevent.payload.PresencePayload;
+import application.presenter.event.model.roomevent.payload.TemperaturePayload;
+import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
+
+import java.lang.reflect.Type;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Implementation of the {@link EventDeserializer} interface that allows an event to be
+ * deserialized from String.
+ */
+public class EventDeserializerImpl implements EventDeserializer {
+    private final Map<String, Type> typeMap = new HashMap<>();
+
+    /**
+     * Default constructor.
+     */
+    public EventDeserializerImpl() {
+        this.typeMap.put(TemperaturePayload.TEMPERATURE_EVENT_KEY, new TypeToken<RoomEvent<TemperaturePayload>>() { }.getType());
+        this.typeMap.put(HumidityPayload.HUMIDITY_EVENT_KEY, new TypeToken<RoomEvent<HumidityPayload>>() { }.getType());
+        this.typeMap.put(LuminosityPayload.LUMINOSITY_EVENT_KEY, new TypeToken<RoomEvent<LuminosityPayload>>() { }.getType());
+        this.typeMap.put(PresencePayload.PRESENCE_EVENT_KEY, new TypeToken<RoomEvent<PresencePayload>>() { }.getType());
+        this.typeMap.put(
+                MedicalTechnologyUsagePayload.MEDICAL_TECHNOLOGY_USAGE_EVENT_KEY,
+                new TypeToken<MedicalTechnologyEvent>() { }.getType()
+        );
+    }
+
+    @Override
+    public final Event<?> fromString(final String eventKey, final String event) {
+        if (!this.typeMap.containsKey(eventKey)) {
+            throw new IllegalArgumentException("Event not supported");
+        }
+        return new Gson().fromJson(event, this.typeMap.get(eventKey));
+    }
+}