added better error handling

Author: Plamen5kov

dts-generator/src/main/java/com/telerik/dts/DtsApi.java

@@ -190,7 +190,12 @@ private int openPackage(JavaClass prevClass, JavaClass currClass) {
     //method related
     private void processMethod(Method m, JavaClass clazz) {
 
-        loadBaseMethods(clazz); //loaded in "baseMethodNames" and "baseMethods"
+        try {
+            loadBaseMethods(clazz); //loaded in "baseMethodNames" and "baseMethods"
+        }
+        catch (ClassNotFoundException e) {
+            e.printStackTrace();
+        }
 
         String tabs = getTabs(this.indent + 1);
 
@@ -235,13 +240,16 @@ private void cacheMethodBySignature(Method m) {
         }
     }
 
-    private void loadBaseMethods(JavaClass clazz) {
+    private void loadBaseMethods(JavaClass clazz) throws ClassNotFoundException {
         baseMethodNames = new HashSet<String>();
         baseMethods = new ArrayList<Method>();
         String scn = clazz.getSuperclassName();
         JavaClass currClass = ClassRepo.findClass(scn);
         assert currClass != null : "javaClass=" + clazz.getClassName() + " scn=" + scn;
 
+        if(currClass == null) {
+            throw new ClassNotFoundException("Couldn't find class: " + scn + " required by class: " + clazz.getClassName() + ". You need to provide the jar containing the missing class: " + scn);
+        }
         //get all base methods and method names
         while (true) {
             for (Method m : currClass.getMethods()) {

dts-generator/src/main/java/com/telerik/dts/FileWriter.java

@@ -30,7 +30,7 @@ public void write(String content, String fileName) {
         try {
             if(this.writeMultipleFiles) {
                 this.ps = new PrintStream(new File(this.outDir.getAbsolutePath(), fileName + ".d.ts"));
-                ps.print("/// <reference path=\"./_helpers.d.ts\" />");
+                ps.println("/// <reference path=\"./_helpers.d.ts\" />");
                 this.ps.print(content);
             }
             else {
@@ -39,7 +39,7 @@ public void write(String content, String fileName) {
 
                 //add helpers reference to the top of the file
                 if(this.isFirstRun) {
-                    ps.print("/// <reference path=\"./_helpers.d.ts\" />");
+                    ps.println("/// <reference path=\"./_helpers.d.ts\" />");
                     this.isFirstRun = false;
                 }