viirya commented on a change in pull request #923:
URL: https://github.com/apache/parquet-mr/pull/923#discussion_r699604019
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File path:
parquet-column/src/main/java/org/apache/parquet/filter2/predicate/Operators.java
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@@ -247,6 +250,80 @@ public int hashCode() {
}
}
+ // base class for In and NotIn
+ public static abstract class SetColumnFilterPredicate<T extends
Comparable<T>> implements FilterPredicate, Serializable {
+ private final Column<T> column;
+ private final Set<T> values;
+ private final String toString;
+
+ protected SetColumnFilterPredicate(Column<T> column, Set<T> values) {
+ this.column = Objects.requireNonNull(column, "column cannot be null");
+ this.values = Objects.requireNonNull(values, "values cannot be null");
+ checkArgument(!values.isEmpty(), "values in SetColumnFilterPredicate
shouldn't be empty!");
+
+ String name = getClass().getSimpleName().toLowerCase(Locale.ENGLISH);
+ StringBuilder str = new StringBuilder();
+ int iter = 0;
+ for (T value : values) {
+ if (iter >= 100) break;
+ str.append(value).append(", ");
+ iter++;
+ }
+ String valueStr = values.size() <= 100 ? str.substring(0, str.length() -
2) : str + "...";
+ this.toString = name + "(" + column.getColumnPath().toDotString() + ", "
+ valueStr + ")";
Review comment:
Is it just enough to replace `str + "..."` to
`str.append("...").toString`?
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