Added HexUtil, MaskUtil

Author: artem-v

services-api/src/main/java/io/scalecube/services/HexUtil.java

@@ -0,0 +1,22 @@
+package io.scalecube.services;
+
+public final class HexUtil {
+
+  private HexUtil() {
+    // Do not instantiate
+  }
+
+  /**
+   * Converts bytes array to hex string.
+   *
+   * @param bytes bytes array
+   * @return hex string
+   */
+  public static String toHex(byte[] bytes) {
+    StringBuilder sb = new StringBuilder();
+    for (byte b : bytes) {
+      sb.append(String.format("%02x", b));
+    }
+    return sb.toString();
+  }
+}

services-api/src/main/java/io/scalecube/services/MaskUtil.java

@@ -0,0 +1,51 @@
+package io.scalecube.services;
+
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.UUID;
+import java.util.stream.Collectors;
+
+public final class MaskUtil {
+
+  private MaskUtil() {
+    // Do not instantiate
+  }
+
+  /**
+   * Mask sensitive data by replacing part of string with an asterisk symbol.
+   *
+   * @param data sensitive data to be masked
+   * @return masked data
+   */
+  public static String mask(String data) {
+    if (data == null || data.length() < 5) {
+      return "*****";
+    }
+    return data.replace(data.substring(2, data.length() - 2), "***");
+  }
+
+  /**
+   * Mask sensitive data by replacing part of string with an asterisk symbol.
+   *
+   * @param data sensitive data to be masked
+   * @return masked data
+   */
+  public static String mask(UUID data) {
+    return data != null ? mask(data.toString()) : null;
+  }
+
+  /**
+   * Mask sensitive data by replacing part of string with an asterisk symbol.
+   *
+   * @param map map with sensitive data to be masked
+   * @return string representation
+   */
+  public static String mask(Map<String, String> map) {
+    if (map == null || map.isEmpty()) {
+      return String.valueOf(map);
+    }
+    return map.entrySet().stream()
+        .collect(Collectors.toMap(Entry::getKey, entry -> mask(entry.getValue())))
+        .toString();
+  }
+}

services-api/src/main/java/io/scalecube/services/Reflect.java

@@ -32,7 +32,7 @@
 import reactor.core.scheduler.Scheduler;
 import reactor.core.scheduler.Schedulers;
 
-public class Reflect {
+public final class Reflect {
 
   private Reflect() {
     // Do not instantiate