denis-chudov commented on code in PR #2141:
URL: https://github.com/apache/ignite-3/pull/2141#discussion_r1251261351
##########
modules/core/src/main/java/org/apache/ignite/internal/util/IgniteUtils.java:
##########
@@ -1087,4 +1088,56 @@ public static boolean startsWith(byte[] key, byte[]
prefix) {
return key.length >= prefix.length
&& Arrays.equals(key, 0, prefix.length, prefix, 0,
prefix.length);
}
+
+ /**
+ * Serializes collection to bytes.
+ *
+ * @param collection Collection.
+ * @param transform Tranform function for the collection element.
+ * @return Byte array.
+ */
+ public static <T> byte[] collectionToBytes(Collection<T> collection,
Function<T, byte[]> transform) {
+ int bytesObjects = 0;
+ List<byte[]> objects = new ArrayList<>();
+
+ for (T o : collection) {
+ byte[] b = transform.apply(o);
+ objects.add(b);
+ bytesObjects += b.length;
+ }
+
+ bytesObjects += Integer.BYTES * (objects.size() + 1);
Review Comment:
fixed
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