Allow Javadoc tag description to begin with an acronym

spring-javaformat/spring-javaformat-checkstyle/src/main/java/io/spring/javaformat/checkstyle/check/SpringJavadocCheck.java

@@ -35,6 +35,7 @@
  * Checks that the javadoc comments follow Spring conventions.
  *
  * @author Phillip Webb
+ * @author Venkata Naga Sai Srikanth Gollapudi
  */
 public class SpringJavadocCheck extends AbstractSpringCheck {
 
@@ -153,7 +154,7 @@ private void checkTagCase(DetailAST ast, TextBlock javadoc) {
 				Matcher matcher = pattern.matcher(text[i]);
 				if (matcher.find()) {
 					String description = matcher.group(1).trim();
-					if (startsWithUppercase(description)) {
+					if (!hasCorrectCase(description)) {
 						log(javadoc.getStartLineNo() + i, text[i].length() - description.length(), "javadoc.badCase");
 					}
 				}
@@ -244,8 +245,23 @@ private void checkAnnotationFieldJavaDoc(DetailAST ast, TextBlock javadoc) {
 		}
 	}
 
+	private boolean hasCorrectCase(String description) {
+		return startsWithAcronym(description) || !startsWithUppercase(description);
+	}
+
 	private boolean startsWithUppercase(String description) {
-		return description.length() > 0 && Character.isUpperCase(description.charAt(0));
+		return !description.isEmpty() && Character.isUpperCase(description.charAt(0));
+	}
+
+	private boolean startsWithAcronym(String description) {
+		int i = 0;
+		while (i < description.length() && Character.isLetter(description.charAt(i))) {
+			if (!Character.isUpperCase(description.charAt(i))) {
+				return false;
+			}
+			i++;
+		}
+		return i >= 2;
 	}
 
 	private void checkForNonJavadocComments(TextBlock block) {

spring-javaformat/spring-javaformat-checkstyle/src/test/resources/source/JavadocValid.java

@@ -19,6 +19,7 @@
  *
  * @param <T> this is a valid param
  * @author Phillip Webb
+ * @author Venkata Naga Sai Srikanth Gollapudi
  */
 public class JavadocValid<T> {
 
@@ -46,6 +47,15 @@ public void test2(String something) {
 	public String test3(String something) throws RuntimeException {
 	}
 
+	/**
+	 * Do something with acronyms.
+	 * @param something JNI hints for the thing
+	 * @return the thing
+	 * @throws RuntimeException on the error
+	 */
+	public String test4(String something) throws RuntimeException {
+	}
+
 	/**
 	 * Class with a numeric date since.
 	 * @since 28.12.2003