Refactor to reduce warnings

Backend/xslt-rest/src/main/java/com/r11/tools/xslt/SparkInitializer.java

@@ -44,7 +44,7 @@ public class SparkInitializer {
     /**
      * Handler that returns processor version
      */
-    private static Route procinfoHandler = (Request req, Response resp) -> {
+    private static final Route procinfoHandler = (Request req, Response resp) -> {
         try {
             resp.header("processor", "Saxon " + Saxon.getVersion() + " over s9api");
             return Saxon.getVersion();
@@ -58,10 +58,10 @@ public class SparkInitializer {
      * Handler that returns info if document is valid
      * Also provides info about request time and processor
      */
-    private static Route xsdHandler = (Request req, Response resp) -> {
+    private static final Route xsdHandler = (Request req, Response resp) -> {
         String body = req.body();
         ObjectMapper mapper = new ObjectMapper();
-        Map<String, String> requestMap = null;
+        Map<String, String> requestMap = new HashMap<>();
         Map<String, String> responseMap = new HashMap<>();
         try {
             requestMap = mapper.readValue(body, Map.class);
@@ -71,8 +71,6 @@ public class SparkInitializer {
 
         String data = requestMap.get("data");
         String xsd = requestMap.get("process");
-        String processor = requestMap.get("processor");
-        String version = requestMap.get("version");
 
         resp.header("processor", Xalan.getVersion());
         long timeStart = System.currentTimeMillis();
@@ -98,10 +96,10 @@ public class SparkInitializer {
     /**
      * Handler that returns output of xpath query and processor data
      */
-    private static Route xpathHandler = (Request req, Response resp) -> {
+    private static final Route xpathHandler = (Request req, Response resp) -> {
         String body = req.body();
         ObjectMapper mapper = new ObjectMapper();
-        Map<String, String> requestMap = null;
+        Map<String, String> requestMap = new HashMap<>();
         Map<String, String> responseMap = new HashMap<>();
         try {
             requestMap = mapper.readValue(body, Map.class);
@@ -173,10 +171,10 @@ public class SparkInitializer {
     /**
      * Handler that returns outcome of xslt transformation and processor data
      */
-    private static Route xsltHandler = (Request req, Response resp) -> {
+    private static final Route xsltHandler = (Request req, Response resp) -> {
         String body = req.body();
         ObjectMapper mapper = new ObjectMapper();
-        Map<String, String> jsonMap = null;
+        Map<String, String> jsonMap = new HashMap<>();
         Map<String, String> responseMap = new HashMap<>();
         try {
             jsonMap = mapper.readValue(body, Map.class);

Backend/xslt-rest/src/main/java/com/r11/tools/xslt/processors/NewNamespaceResolver.java

@@ -1,14 +1,11 @@
 package com.r11.tools.xslt.processors;
 
-import net.sf.saxon.om.NamespaceBinding;
 import net.sf.saxon.om.NamespaceMap;
 import net.sf.saxon.s9api.XPathCompiler;
 import net.sf.saxon.s9api.XdmNode;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-import java.util.Iterator;
-
 /**
  * Handler for saxon namespace scan engine.
  * All found namespaces are stored within {@link #namespaceMap}
@@ -24,12 +21,13 @@ public class NewNamespaceResolver {
      * @param doc dom structure object
      * @return map of namespaces
      */
+
+    // TODO: Closer inspection. Return value is never used according to IntelliJ
+    //
     public NamespaceMap process(XdmNode doc) {
         namespaceMap = NamespaceMap.emptyMap();
-        Iterator<XdmNode> it = doc.children().iterator();
-//        TODO: remove
-        while (it.hasNext()) {
-            XdmNode tmp = it.next();
+        //        TODO: remove
+        for (XdmNode tmp : doc.children()) {
             extractNamespace(tmp);
         }
 //        end
@@ -41,12 +39,6 @@ public class NewNamespaceResolver {
      * @param compiler compiler used to compile xpath statements
      */
     public void exportNamespaces(XPathCompiler compiler){
-        Iterator<NamespaceBinding> it = namespaceMap.iterator();
-//        TODO: remove
-        while(it.hasNext()){
-            System.out.println(it.next());
-        }
-//        end
         namespaceMap.forEach(namespaceBinding -> compiler.declareNamespace(namespaceBinding.getPrefix(), namespaceBinding.getURI()));
     }
 
@@ -61,14 +53,11 @@ public class NewNamespaceResolver {
         }
         if (node.children().iterator().hasNext()) {
 
-            Iterator<XdmNode> it = node.children().iterator();
-            while (it.hasNext()) {
-                XdmNode rNode = it.next();
-//                TODO: remove
-                if(rNode.getUnderlyingNode().getPrefix().isEmpty() && !rNode.getParent().getUnderlyingNode().getPrefix().isEmpty()){
+            for (XdmNode rNode : node.children()) {
+                if (rNode.getUnderlyingNode().getPrefix().isEmpty() && !rNode.getParent().getUnderlyingNode().getPrefix().isEmpty()) {
                     LOG.warn("Missing prefix. Parent has " + rNode.getParent().getUnderlyingNode().getPrefix() + ", but child has none");
                 }
-//                end
+
                 extractNamespace(rNode);
             }
         }

Backend/xslt-rest/src/main/java/com/r11/tools/xslt/processors/Saxon.java

@@ -14,8 +14,6 @@ import java.io.StringWriter;
  */
 public class Saxon {
 
-    private static final Logger LOG = LogManager.getLogger("Saxon");
-
     /**
      * Transforms string containing xml document via xslt
      * @param data xml to be transformed

Backend/xslt-rest/src/main/java/com/r11/tools/xslt/processors/Xalan.java

@@ -28,8 +28,6 @@ import java.io.StringWriter;
  */
 public class Xalan {
 
-    private static final Logger LOG = LogManager.getLogger("Xalan");
-
     /**
      * Transforms string containing xml document via xslt
      * @param data xml to be transformed