DEVX-813: adding InventoryUtil

Author: ShipilA

commercetools/commercetools-importapi-utils/src/main/java/com/commercetools/sdk/InventoryUtil.java

@@ -0,0 +1,30 @@
+package com.commercetools.sdk;
+
+import com.commercetools.api.models.channel.ChannelReference;
+import com.commercetools.api.models.inventory.InventoryEntry;
+import com.commercetools.importapi.models.common.ChannelKeyReference;
+import com.commercetools.importapi.models.inventories.InventoryImport;
+
+import static com.commercetools.sdk.CommonImportUtil.getImportApiCustom;
+
+public class InventoryUtil {
+    public InventoryImport toInventoryImport(InventoryEntry entry) {
+        return InventoryImport.builder()
+                .key(entry.getKey())  // required field
+                .sku(entry.getSku())  // required field
+                .quantityOnStock(entry.getQuantityOnStock())  // required field
+                .restockableInDays(entry.getRestockableInDays())
+                .expectedDelivery(entry.getExpectedDelivery())
+                .reservationExpirationInMinutes(entry.getReservationExpirationInMinutes())
+                .supplyChannel(getImportAPISupplyChannel(entry.getSupplyChannel()))
+                .custom(getImportApiCustom(entry.getCustom()))
+                .build();
+    }
+
+    private ChannelKeyReference getImportAPISupplyChannel(ChannelReference supplyChannel) {
+        if (supplyChannel == null) {
+            return null;
+        }
+        return ChannelKeyReference.builder().key(supplyChannel.getId()).build();
+    }
+}