ygerzhedovich commented on a change in pull request #346:
URL: https://github.com/apache/ignite-3/pull/346#discussion_r713002331
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File path: modules/api/src/main/java/org/apache/ignite/table/Tuple.java
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@@ -51,6 +52,68 @@ static Tuple create(int capacity) {
return new TupleImpl(capacity);
}
+ /**
+ * Returns the hash code value for the tuple.
+ * <p>
+ * The hash code of a tuple is defined to be the sum of the hash codes of
each pair of column name and column value.
+ * This ensures that {@code m1.equals(m2)} implies that {@code
m1.hashCode()==m2.hashCode()} for any tuples
+ * {@code m1} and {@code m2}, as required by the general contract of
{@link Object#hashCode}.
+ * <p>
+ * The hash code of a pair of column name and column value {@code i} is
defined to be:
+ * <pre>(columnName(i).hashCode()) ^ (value(i)==null ? 0 :
value(i).hashCode())</pre>
+ *
+ * @param tuple Tuple.
+ * @return The hash code value for the tuple.
+ */
+ static int hashCode(Tuple tuple) {
+ int hash = 0;
+
+ for (int idx = 0; idx < tuple.columnCount(); idx++) {
+ String key = tuple.columnName(idx);
Review comment:
let's rename variable to 'colName' instead of 'key'
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