Add transformation service placeholder.

src/main/java/com/lmco/spectrum/systemnavigation3d/service/SmgService.java

@@ -4,6 +4,7 @@ import com.amazonaws.util.IOUtils;
 import com.lmco.spectrum.systemnavigation3d.util.io.SfxZipInputStream;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 import javax.annotation.Nullable;
@@ -22,17 +23,18 @@ public class SmgService {
     private static final Logger log = LoggerFactory.getLogger(SmgService.class);
     private static final String PRODUCT_XML = "product.smgXml";
 
+    @Autowired
+    TransformationService transformationService;
+
     // Max capacity is 2^31-1 bytes or ~2GB.
     @Nullable
     public byte[] processSmg(byte[] data){
         Map<String, byte[]> entryMap = getSmgXmlEntry(data);
         byte[] smgXmlData = entryMap.get(PRODUCT_XML);
         if(smgXmlData != null) {
             String smgXml = new String(smgXmlData);
-            // TODO transform
-
-            // Update XML entry.
-            entryMap.put(PRODUCT_XML, smgXml.getBytes());
+            smgXml = transformationService.transform(smgXml);
+            entryMap.put(PRODUCT_XML, smgXml.getBytes()); // Update XML entry.
             return repackageSmg(entryMap);
         } else {
             return null;

src/main/java/com/lmco/spectrum/systemnavigation3d/service/TransformationService.java

@@ -0,0 +1,17 @@
+package com.lmco.spectrum.systemnavigation3d.service;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class TransformationService {
+
+    // TODO make functional
+    // TODO consider types of transformations we need to make
+    // accept list of transformation options?
+    // accept GEIA dtos and infer transformations?
+    // pending
+    public String transform(String smgXml){
+        return smgXml;
+    }
+
+}