vinothchandar commented on a change in pull request #1159: [WIP][HUDI-479]
Eliminate or Minimize use of Guava if possible
URL: https://github.com/apache/incubator-hudi/pull/1159#discussion_r363821619
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File path:
hudi-common/src/main/java/org/apache/hudi/common/util/StringUtils.java
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@@ -67,4 +69,45 @@ public static String toHexString(byte[] bytes) {
public static boolean isNullOrEmpty(String str) {
return str == null || str.length() == 0;
}
+
+ /**
+ * Returns the given string if it is non-null; the empty string otherwise.
+ *
+ * @param string the string to test and possibly return
+ * @return {@code string} itself if it is non-null; {@code ""} if it is null
+ */
+ public static String nullToEmpty(@Nullable String string) {
+ return string == null ? "" : string;
+ }
+
+ /**
+ * Returns the given string if it is nonempty; {@code null} otherwise.
+ *
+ * @param string the string to test and possibly return
+ * @return {@code string} itself if it is nonempty; {@code null} if it is
empty or null
+ */
+ public static @Nullable String emptyToNull(@Nullable String string) {
+ return stringIsNullOrEmpty(string) ? null : string;
+ }
+
+ public static boolean stringIsNullOrEmpty(@Nullable String string) {
+ return string == null || string.isEmpty();
+ }
+
+ /**
+ * Convert a Signed Hash to Hex.
+ * @param bytes - hashed bytes
+ * @return Hex representation of hash
+ */
+ public static String bytesToHexString(final byte[] bytes) {
Review comment:
Realized that this class needs a unit test.. :/
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