denis-chudov commented on code in PR #5092:
URL: https://github.com/apache/ignite-3/pull/5092#discussion_r1960126807
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modules/core/src/main/java/org/apache/ignite/internal/util/io/IgniteDataOutput.java:
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@@ -234,4 +236,43 @@ public interface IgniteDataOutput extends DataOutput {
* @throws IOException if something went wrong
*/
void flush() throws IOException;
+
+ /**
+ * Writes a collection.
+ *
+ * @param collection Collection.
+ * @param elementWriter Element writer.
+ */
+ default <T> void writeCollection(Collection<T> collection, ObjectWriter<T>
elementWriter) throws IOException {
+ writeVarInt(collection.size());
+
+ for (T e : collection) {
+ elementWriter.write(e, this);
+ }
+ }
+
+ /**
+ * Writes a map.
+ *
+ * @param map Map.
+ * @param keyWriter Key writer.
+ * @param valWriter Value writer.
+ */
+ default <K, V> void writeMap(Map<K, V> map, ObjectWriter<K> keyWriter,
ObjectWriter<V> valWriter)
+ throws IOException {
+ writeVarInt(map.size());
+
+ for (Map.Entry<K, V> e : map.entrySet()) {
+ keyWriter.write(e.getKey(), this);
+ valWriter.write(e.getValue(), this);
+ }
+ }
+
+ /**'
Review Comment:
wow
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