smarthi commented on a change in pull request #1338: [HUDI-615]: Add Test cases
for StringUtils.
URL: https://github.com/apache/incubator-hudi/pull/1338#discussion_r379901360
##########
File path:
hudi-common/src/main/java/org/apache/hudi/common/util/StringUtils.java
##########
@@ -67,4 +69,29 @@ 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;
+ }
+
+ private static boolean stringIsNullOrEmpty(@Nullable String string) {
+ return string == null || string.isEmpty();
+ }
Review comment:
yes these can be used as replacement for Guava-Strings in SparkMain.java.
Also see
https://github.com/apache/incubator-hudi/pull/1159#discussion_r363821619 for
the need to write test cases.
The new methods will potentially be used in the bigger PR# 1159.
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