dan-s1 commented on code in PR #7194: URL: https://github.com/apache/nifi/pull/7194#discussion_r1218460307
########## nifi-nar-bundles/nifi-standard-services/nifi-record-serialization-services-bundle/nifi-record-serialization-services/src/main/java/org/apache/nifi/excel/ExcelSchemaInference.java: ########## @@ -0,0 +1,83 @@ +/* + * 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.nifi.excel; + +import org.apache.nifi.schema.inference.FieldTypeInference; +import org.apache.nifi.schema.inference.RecordSource; +import org.apache.nifi.schema.inference.SchemaInferenceEngine; +import org.apache.nifi.schema.inference.TimeValueInference; +import org.apache.nifi.serialization.SimpleRecordSchema; +import org.apache.nifi.serialization.record.DataType; +import org.apache.nifi.serialization.record.RecordField; +import org.apache.nifi.serialization.record.RecordSchema; +import org.apache.nifi.util.SchemaInferenceUtil; +import org.apache.poi.ss.usermodel.Cell; +import org.apache.poi.ss.usermodel.DataFormatter; +import org.apache.poi.ss.usermodel.Row; + +import java.io.IOException; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Locale; +import java.util.Map; +import java.util.stream.Collectors; +import java.util.stream.IntStream; + +public class ExcelSchemaInference implements SchemaInferenceEngine<Row> { + private final TimeValueInference timeValueInference; + private final DataFormatter dataFormatter; + + public ExcelSchemaInference(TimeValueInference timeValueInference) { + this(timeValueInference, null); + } + + public ExcelSchemaInference(TimeValueInference timeValueInference, Locale locale) { + this.timeValueInference = timeValueInference; + this.dataFormatter = locale == null ? new DataFormatter() : new DataFormatter(locale); + } + + @Override + public RecordSchema inferSchema(RecordSource<Row> recordSource) throws IOException { + final Map<String, FieldTypeInference> typeMap = new LinkedHashMap<>(); + Row row; + while((row = recordSource.next()) != null) { + inferSchema(row, typeMap); + } + return createSchema(typeMap); + } + + private void inferSchema(final Row row, final Map<String, FieldTypeInference> typeMap) { + if (ExcelUtils.hasCells(row)) { + IntStream.range(0, row.getLastCellNum()) + .forEach(index -> { + final Cell cell = row.getCell(index); + final String fieldName = Integer.toString(index); Review Comment: Sounds good to me. Per the comment on the query earlier this would certainly be an improvement. -- 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...@nifi.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
