srowen commented on a change in pull request #30981:
URL: https://github.com/apache/spark/pull/30981#discussion_r552093857
##########
File path:
common/unsafe/src/main/java/org/apache/spark/unsafe/types/ByteArray.java
##########
@@ -101,4 +101,117 @@ public static long getPrefix(byte[] bytes) {
}
return result;
}
+
+ /**
+ * Trims bytes representing spaces from both ends of this byte array.
+ *
+ * @param srcArr the source byte array
+ * @return this byte array with no bytes representing spaces at the start or
end
+ */
+ public static byte[] trim(byte[] srcArr) {
+ return trim(srcArr, " ".getBytes());
Review comment:
This could theoretically be locale-dependent. Why not just write in the
byte 32 to be clear?
##########
File path:
common/unsafe/src/main/java/org/apache/spark/unsafe/types/ByteArray.java
##########
@@ -101,4 +101,117 @@ public static long getPrefix(byte[] bytes) {
}
return result;
}
+
+ /**
+ * Trims bytes representing spaces from both ends of this byte array.
+ *
+ * @param srcArr the source byte array
+ * @return this byte array with no bytes representing spaces at the start or
end
+ */
+ public static byte[] trim(byte[] srcArr) {
+ return trim(srcArr, " ".getBytes());
+ }
+
+ /**
+ * Trims instances of the given trim byte array from both ends of this byte
array.
+ *
+ * @param srcArr the source byte array
+ * @param trimArr the trim byte array
+ * @return this byte array with no occurrences of the trim byte array at the
start or end,
+ * or `null` if `trimArr` is `null`
+ */
+ public static byte[] trim(byte[] srcArr, byte[] trimArr) {
+ return trimLeft(trimRight(srcArr, trimArr), trimArr);
+ }
+
+ /**
+ * Trims bytes representing spaces from the start of this byte array.
+ *
+ * @param srcArr the source byte array
+ * @return this byte array with no bytes representing spaces at the start
+ */
+ public static byte[] trimLeft(byte[] srcArr) {
+ return trimLeft(srcArr, " ".getBytes());
+ }
+
+ /**
+ * Trims instances of the given trim byte array from the start of this byte
array.
+ *
+ * @param srcArr the source byte array
+ * @param trimArr the trim byte array
+ * @return this byte array with no occurrences of the trim byte array at the
start,
+ * or `null` if `trimArr` is `null`
+ */
+ public static byte[] trimLeft(byte[] srcArr, byte[] trimArr) {
+ if (trimArr == null) {
+ return null;
+ } else if (trimArr.length == 0 || srcArr.length == 0) {
Review comment:
Nit: the two elses are redundant
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