paul-rogers commented on a change in pull request #1749: DRILL-7177: Format Plugin for Excel Files URL: https://github.com/apache/drill/pull/1749#discussion_r334292050
########## File path: contrib/format-excel/src/main/java/org/apache/drill/exec/store/excel/ExcelBatchReader.java ########## @@ -0,0 +1,398 @@ +/* + * 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.drill.exec.store.excel; + +import org.apache.drill.common.exceptions.UserException; +import org.apache.drill.common.types.TypeProtos; +import org.apache.drill.exec.physical.impl.scan.file.FileScanFramework; +import org.apache.drill.exec.physical.impl.scan.framework.ManagedReader; +import org.apache.drill.exec.physical.resultSet.ResultSetLoader; +import org.apache.drill.exec.physical.resultSet.RowSetLoader; +import org.apache.drill.exec.record.metadata.ColumnMetadata; +import org.apache.drill.exec.record.metadata.MetadataUtils; +import org.apache.drill.exec.record.metadata.SchemaBuilder; +import org.apache.drill.exec.record.metadata.TupleMetadata; +import org.apache.drill.exec.vector.accessor.ScalarWriter; +import org.apache.drill.exec.vector.accessor.TupleWriter; +import org.apache.hadoop.fs.FSDataInputStream; +import org.apache.hadoop.fs.Path; +import org.apache.hadoop.mapred.FileSplit; + +import org.apache.poi.ss.usermodel.Cell; +import org.apache.poi.ss.usermodel.CellValue; +import org.apache.poi.ss.usermodel.DateUtil; +import org.apache.poi.ss.usermodel.FormulaEvaluator; +import org.apache.poi.ss.usermodel.Row; +import org.apache.poi.xssf.usermodel.XSSFSheet; +import org.apache.poi.xssf.usermodel.XSSFWorkbook; +import org.apache.drill.exec.physical.impl.scan.file.FileScanFramework.FileSchemaNegotiator; +import org.joda.time.Instant; + +import java.util.Iterator; +import java.io.IOException; +import java.util.ArrayList; + +public class ExcelBatchReader implements ManagedReader<FileSchemaNegotiator> { + private ExcelReaderConfig readerConfig; + + private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(ExcelBatchReader.class); + + private XSSFWorkbook workbook; + + private FSDataInputStream fsStream; + + private static final String SAFE_WILDCARD = "_$"; + + private static final String SAFE_SEPARATOR = "_"; + + private static final String PARSER_WILDCARD = ".*"; + + private static final String MISSING_FIELD_NAME_HEADER = "field_"; + + private static final String SAFE_NEWLINE_REPLACEMENT = " "; + + private XSSFSheet sheet; + + private FormulaEvaluator evaluator; + + private ArrayList<String> excelFieldNames; + + private Iterator<Row> rowIterator; + + private int totalColumnCount; + + private int lineCount; + + private FileSplit split; + + private ResultSetLoader loader; + + private int recordCount; + + public static class ExcelReaderConfig { + protected final ExcelFormatPlugin plugin; + + protected int headerRow; + + protected int lastRow; + + protected int firstColumn; + + protected int lastColumn; + + protected boolean readAllFieldsAsVarChar; + + protected boolean evaluateFormulae; + + protected TupleMetadata schema; + + protected String sheetName; + + public ExcelReaderConfig(ExcelFormatPlugin plugin, int headerRow, int lastRow, int firstColumn, int lastColumn, boolean readAllFieldsAsVarChar, boolean evaluateFormulae, + //TupleMetadata schema, + String sheetName) { + this.plugin = plugin; + this.headerRow = headerRow; + this.lastRow = lastRow; + this.firstColumn = firstColumn; + this.lastColumn = lastColumn; + this.readAllFieldsAsVarChar = readAllFieldsAsVarChar; + this.evaluateFormulae = evaluateFormulae; + this.sheetName = sheetName; + + } + } + + public ExcelBatchReader(ExcelReaderConfig readerConfig) { + this.readerConfig = readerConfig; + } + + @Override + public boolean open(FileSchemaNegotiator negotiator) { + verifyConfigOptions(); + split = negotiator.split(); + openFile(negotiator); + TupleMetadata schema = defineSchema(); + this.loader = negotiator.build(); + return true; + } + + private void openFile(FileScanFramework.FileSchemaNegotiator negotiator) { + try { + String filePath = split.getPath().toString(); + this.fsStream = negotiator.fileSystem().open(new Path(filePath)); Review comment: Do we need to convert from a path to a string to a path? Can we just pass `split.getPath()` directly to `open()`? ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services