replace StringUtils#notEmpty() with predicate (s -> !s.isEmpty())

Author: amarkevich

core/src/main/java/org/apache/cxf/common/util/StringUtils.java

@@ -24,14 +24,11 @@
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
 import java.util.List;
-import java.util.function.Predicate;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 public final class StringUtils {
 
-    private static final Predicate<String> NOT_EMPTY = (String s) -> !s.isEmpty();
-
     private static final char[] HEX = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
 
     private StringUtils() {
@@ -49,10 +46,6 @@ public static boolean isEmpty(String str) {
         return true;
     }
 
-    public static Predicate<String> notEmpty() {
-        return NOT_EMPTY;
-    }
-
     public static boolean isEmpty(List<String> list) {
         if (list == null || list.isEmpty()) {
             return true;

rt/frontend/jaxrs/src/main/java/org/apache/cxf/jaxrs/utils/JAXRSUtils.java

@@ -326,7 +326,7 @@ public static List<PathSegment> getPathSegments(String thePath, boolean decode,
             segments.addAll(
                 Arrays
                     .stream(thePath.substring(start).split("/"))
-                    .filter(StringUtils.notEmpty())
+                    .filter(s -> !s.isEmpty())
                     .map(p -> new PathSegmentImpl(p, decode))
                     .collect(Collectors.toList()));
 

rt/rs/security/oauth-parent/oauth2/src/main/java/org/apache/cxf/rs/security/oauth2/utils/OAuthUtils.java

@@ -251,7 +251,7 @@ public static boolean isGrantSupportedForClient(Client client,
 
     public static List<String> parseScope(String requestedScope) {
         if (requestedScope != null) {
-            return Arrays.stream(requestedScope.split(" ")).filter(StringUtils.notEmpty()).collect(toList());
+            return Arrays.stream(requestedScope.split(" ")).filter(s -> !s.isEmpty()).collect(toList());
         } else {
             return Collections.emptyList();
         }