danepitkin commented on code in PR #35570:
URL: https://github.com/apache/arrow/pull/35570#discussion_r1323252393
##########
java/dataset/src/main/java/org/apache/arrow/dataset/scanner/ScanOptions.java:
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@@ -69,4 +74,77 @@ public Optional<String[]> getColumns() {
public long getBatchSize() {
return batchSize;
}
+
+ public Optional<ByteBuffer> getSubstraitProjection() {
+ return substraitProjection;
+ }
+
+ public Optional<ByteBuffer> getSubstraitFilter() {
+ return substraitFilter;
+ }
+
+ /**
+ * Builder for Options used during scanning.
+ */
+ public static class Builder {
+ private final long batchSize;
+ private Optional<String[]> columns;
+ private Optional<ByteBuffer> substraitProjection;
+ private Optional<ByteBuffer> substraitFilter;
+
+ /**
+ * Constructor.
+ * @param batchSize Maximum row number of each returned {@link
org.apache.arrow.vector.ipc.message.ArrowRecordBatch}
+ */
+ public Builder(long batchSize) {
+ this.batchSize = batchSize;
+ }
+
+ /**
+ * Set the Projected columns. Empty for scanning all columns.
+ *
+ * @param columns Projected columns. Empty for scanning all columns.
+ * @return the ScanOptions configured.
+ */
+ public Builder columns(Optional<String[]> columns) {
Review Comment:
Ah I see. I assumed a user would prefer to only use the `columns` API when
they want to project a subset of columns because if left blank, the builder
will build an empty `Optional<> columns` object automatically. I'm okay with
leaving as-is. Thanks for the udpates!
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