JingsongLi commented on code in PR #396: URL: https://github.com/apache/flink-table-store/pull/396#discussion_r1031291563
########## flink-table-store-core/src/main/java/org/apache/flink/table/store/file/utils/BulkFormatMapping.java: ########## @@ -0,0 +1,133 @@ +/* + * 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.flink.table.store.file.utils; + +import org.apache.flink.connector.file.src.FileSourceSplit; +import org.apache.flink.connector.file.src.reader.BulkFormat; +import org.apache.flink.table.data.RowData; +import org.apache.flink.table.store.file.KeyValue; +import org.apache.flink.table.store.file.predicate.Predicate; +import org.apache.flink.table.store.file.schema.DataField; +import org.apache.flink.table.store.file.schema.KeyValueFieldsExtractor; +import org.apache.flink.table.store.file.schema.RowDataType; +import org.apache.flink.table.store.file.schema.SchemaEvolutionUtil; +import org.apache.flink.table.store.file.schema.TableSchema; +import org.apache.flink.table.store.format.FileFormat; +import org.apache.flink.table.store.utils.Projection; +import org.apache.flink.table.types.logical.RowType; + +import javax.annotation.Nullable; + +import java.util.List; + +/** Class with index mapping and bulk format. */ +public class BulkFormatMapping { + @Nullable private final int[] indexMapping; + private final BulkFormat<RowData, FileSourceSplit> bulkFormat; + + public BulkFormatMapping(int[] indexMapping, BulkFormat<RowData, FileSourceSplit> bulkFormat) { + this.indexMapping = indexMapping; + this.bulkFormat = bulkFormat; + } + + @Nullable + public int[] getIndexMapping() { + return indexMapping; + } + + public BulkFormat<RowData, FileSourceSplit> getReaderFactory() { + return bulkFormat; + } + + public static BulkFormatMappingBuilder newBuilder( + FileFormat fileFormat, + KeyValueFieldsExtractor extractor, + int[][] keyProjection, + int[][] valueProjection, + int[][] projection, + @Nullable List<Predicate> filters) { + return new BulkFormatMappingBuilder( + fileFormat, extractor, keyProjection, valueProjection, projection, filters); + } + + /** Builder to build {@link BulkFormatMapping}. */ + public static class BulkFormatMappingBuilder { + private final FileFormat fileFormat; + private final KeyValueFieldsExtractor extractor; + private final int[][] keyProjection; + private final int[][] valueProjection; + private final int[][] projection; + @Nullable private final List<Predicate> filters; + + private BulkFormatMappingBuilder( + FileFormat fileFormat, + KeyValueFieldsExtractor extractor, + int[][] keyProjection, + int[][] valueProjection, + int[][] projection, + @Nullable List<Predicate> filters) { + this.fileFormat = fileFormat; + this.extractor = extractor; + this.keyProjection = keyProjection; + this.valueProjection = valueProjection; + this.projection = projection; + this.filters = filters; + } + + public BulkFormatMapping build(TableSchema tableSchema, TableSchema dataSchema) { + List<DataField> tableKeyFields = extractor.keyFields(tableSchema); + List<DataField> tableValueFields = extractor.valueFields(tableSchema); + + List<DataField> dataKeyFields = extractor.keyFields(dataSchema); + List<DataField> dataValueFields = extractor.valueFields(dataSchema); + int[][] dataKeyProjection = + SchemaEvolutionUtil.createDataProjection( + tableKeyFields, dataKeyFields, keyProjection); + int[][] dataValueProjection = + SchemaEvolutionUtil.createDataProjection( + tableValueFields, dataValueFields, valueProjection); + + RowType keyType = RowDataType.toRowType(false, dataKeyFields); + RowType valueType = RowDataType.toRowType(false, dataValueFields); + RowType dataRecordType = KeyValue.schema(keyType, valueType); + int[][] dataProjection = + KeyValue.project( + dataKeyProjection, dataValueProjection, keyType.getFieldCount()); + + int[] indexMapping = + SchemaEvolutionUtil.createIndexMapping( Review Comment: This process is really complicated, and I'm crazy. We can add more comments to explain every step. -- 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: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
