fix(mpconfig): Do not cutoff file extensions for property names in Di…

…rConfigSource

As requested by @pdudits, do not cut off file extensions silently.
People on Windows can deal with text files without a file extension,
better stay consistent.

Relates to #5006

nucleus/payara-modules/nucleus-microprofile/config-service/src/main/java/fish/payara/nucleus/microprofile/config/source/DirConfigSource.java

@@ -418,30 +418,14 @@ public final static String parsePropertyNameFromPath(Path path, Path rootDir) {
         String property = "";
         if (! path.getParent().equals(rootDir))
             property += rootDir.relativize(path.getParent()).toString() + File.separatorChar;
-        // 2. ignore all file suffixes after last dot
-        property += removeFileExtension(path.getFileName().toString());
+        // 2. add the file name (might be used for mangling in the future)
+        property += path.getFileName();
         // 3. replace all path seps with a ".",
         property = property.replace(File.separatorChar, '.');
         // so "/config/foo/bar/test/one.txt" becomes "foo/bar/test/one.txt" becomes "foo.bar.test.one" property name
         return property;
     }
 
-    /**
-     * Litte helper to remove the file extension (not present in Java std functionality)
-     * @param filename A filename containing a dot, marking the start of the file extension
-     * @return Filename without a suffix (if present)
-     */
-    public final static String removeFileExtension(String filename) {
-        if (filename == null || ! filename.contains("."))
-            return filename;
-        int lastIndex = filename.lastIndexOf('.');
-        // dot does not belong to file, but parent dir or
-        // extension is longer than 3 chars (all clear text formats would have 3 chars max)
-        if (filename.lastIndexOf(File.separatorChar) > lastIndex || lastIndex < filename.length() - 4)
-            return filename;
-        return filename.substring(0, lastIndex);
-    }
-
     /**
      * Actually read the data from the file, assuming UTF-8 formatted content, creating properties from it.
      * @param path The file to read

nucleus/payara-modules/nucleus-microprofile/config-service/src/test/java/fish/payara/nucleus/microprofile/config/source/DirConfigSourceTest.java

@@ -71,7 +71,8 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
-import static org.mockito.Mockito.*;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
 
 public class DirConfigSourceTest {
 
@@ -179,17 +180,6 @@ public void testParsePropertyNameFromPath() {
         examples.put(subpath( "foo", "bar.test", "ex"), "foo.bar.test.ex");
         examples.put(subpath( "foo.bar", "test", "ex"), "foo.bar.test.ex");
 
-        // we ignore the last file extension if not more than 3 chars.
-        // this might lead to unexpected behaviour for a user.
-        // best advice: do not use dots in filename, only in directory names.
-        examples.put(subpath( "foo", "bar", "test", "ex.txt"), "foo.bar.test.ex");
-        examples.put(subpath( "foo", "bar", "test", "ex.tar.gz"), "foo.bar.test.ex.tar");
-        examples.put(subpath( "foo", "bar", "test", "ex.helo"), "foo.bar.test.ex.helo");
-        examples.put(subpath( "foo.bar", "test.ex"), "foo.bar.test");
-        examples.put(subpath( "foo", "bar.test.ex"), "foo.bar.test");
-        examples.put(subpath( "foo.bar.test.ex"), "foo.bar.test");
-        examples.put(subpath( "foo", "bar", "test.ex"), "foo.bar.test");
-
         // when & then
         for (Map.Entry<Path, String> ex : examples.entrySet()) {
             //System.out.println(ex.getKey()+" = "+ex.getValue());