amogh-jahagirdar commented on code in PR #12774: URL: https://github.com/apache/iceberg/pull/12774#discussion_r2440877379
########## core/src/main/java/org/apache/iceberg/formats/ReadBuilder.java: ########## @@ -0,0 +1,118 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.iceberg.formats; + +import java.nio.ByteBuffer; +import java.util.Map; +import org.apache.iceberg.Schema; +import org.apache.iceberg.expressions.Expression; +import org.apache.iceberg.io.CloseableIterable; +import org.apache.iceberg.mapping.NameMapping; + +/** + * Builder interface for creating file readers across supported data file formats. The {@link + * FormatModel} implementations provides appropriate {@link ReadBuilder} instances + * + * <p>The {@link ReadBuilder} follows the builder pattern to configure and create {@link + * CloseableIterable} instances that read data from source files. Configuration options include + * schema projection, predicate filtering, record batching, and encryption settings. + * + * <p>This interface is directly exposed to users for parameterizing readers. + */ +public interface ReadBuilder { + /** + * Restricts the read to the given range: [start, start + length). + * + * @param newStart the start position for this read + * @param newLength the length of the range this read should scan + */ + ReadBuilder split(long newStart, long newLength); + + /** Set the projection schema. */ + ReadBuilder project(Schema schema); + + /** Sets the expected output schema. If not provided derived from the {@link #project(Schema)}. */ + default ReadBuilder outputSchema(Object schema) { + throw new UnsupportedOperationException("Not implemented yet"); + } + + /** + * Configures whether filtering should be case-sensitive. If the reader supports filtering, it + * must respect this setting. + * + * @param caseSensitive indicates if filtering is case-sensitive + */ + ReadBuilder caseSensitive(boolean caseSensitive); + + /** + * Pushes down the {@link Expression} filter for the reader to prevent reading unnecessary + * records. Some readers might not be able to filter some part of the exception. In this case the + * reader might return unfiltered or partially filtered rows. It is the caller's responsibility to + * apply the filter again. The default implementation sets the filter to be case-sensitive. + * + * @param filter the filter to set + */ + ReadBuilder filter(Expression filter); + + /** + * Sets configuration key/value pairs for the reader. Reader builders should ignore configuration + * keys not known for them. + */ + ReadBuilder set(String key, String value); + + /** + * Sets multiple configuration key/value pairs for the reader. Reader builders should ignore + * configuration keys not known for them. + */ + default ReadBuilder setAll(Map<String, String> properties) { + properties.forEach(this::set); + return this; + } + + /** Enables reusing the containers returned by the reader. Decreases pressure on GC. */ + ReadBuilder reuseContainers(); + + /** Sets the batch size for vectorized readers. */ + ReadBuilder recordsPerBatch(int numRowsPerBatch); Review Comment: Ok, that's reasonable, if the main driver is just to make it easy to move to the new APIs that's fair. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
