dan-s1 commented on code in PR #7194: URL: https://github.com/apache/nifi/pull/7194#discussion_r1214657842
########## nifi-nar-bundles/nifi-standard-services/nifi-record-serialization-services-bundle/nifi-record-serialization-services/src/main/java/org/apache/nifi/excel/ExcelHeaderSchemaStrategy.java: ########## @@ -0,0 +1,116 @@ +/* + * 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.context.PropertyContext; +import org.apache.nifi.logging.ComponentLog; +import org.apache.nifi.schema.access.SchemaAccessStrategy; +import org.apache.nifi.schema.access.SchemaField; +import org.apache.nifi.schema.access.SchemaNotFoundException; +import org.apache.nifi.schema.inference.FieldTypeInference; +import org.apache.nifi.schema.inference.RecordSource; +import org.apache.nifi.schema.inference.TimeValueInference; +import org.apache.nifi.serialization.DateTimeUtils; +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.io.InputStream; +import java.util.EnumSet; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Locale; +import java.util.Map; +import java.util.Set; +import java.util.stream.Collectors; +import java.util.stream.IntStream; + +public class ExcelHeaderSchemaStrategy implements SchemaAccessStrategy { + private static final Set<SchemaField> schemaFields = EnumSet.noneOf(SchemaField.class); + + private final PropertyContext context; + + private final DataFormatter dataFormatter; + + private final ComponentLog logger; + + public ExcelHeaderSchemaStrategy(PropertyContext context, ComponentLog logger) { + this(context, logger, null); + } + + public ExcelHeaderSchemaStrategy(PropertyContext context, ComponentLog logger, Locale locale) { + this.context = context; + this.logger = logger; + this.dataFormatter = locale == null ? new DataFormatter() : new DataFormatter(locale); + } + + @Override + public RecordSchema getSchema(Map<String, String> variables, InputStream contentStream, RecordSchema readSchema) throws SchemaNotFoundException, IOException { + if (this.context == null) { + throw new SchemaNotFoundException("Schema Access Strategy intended only for validation purposes and cannot obtain schema"); + } + + String errMsg = "Failed to read Header line from Excel worksheet"; + RecordSource<Row> recordSource; + try { + recordSource = new ExcelRecordSource(contentStream, context, variables, logger); + } catch (Exception e) { + throw new SchemaNotFoundException(errMsg, e); + } + + Row headerRow = recordSource.next(); + if (!ExcelUtils.hasCells(headerRow)) { + throw new SchemaNotFoundException("The chosen header line in the Excel worksheet had no cells"); + } + + try { + String dateFormat = context.getProperty(DateTimeUtils.DATE_FORMAT).getValue(); + String timeFormat = context.getProperty(DateTimeUtils.TIME_FORMAT).getValue(); + String timestampFormat = context.getProperty(DateTimeUtils.TIMESTAMP_FORMAT).getValue(); + final TimeValueInference timeValueInference = new TimeValueInference(dateFormat, timeFormat, timestampFormat); + final Map<String, FieldTypeInference> typeMap = new LinkedHashMap<>(); + IntStream.range(0, headerRow.getLastCellNum()) + .forEach(index -> { + final Cell cell = headerRow.getCell(index); + final String fieldName = Integer.toString(index); + final FieldTypeInference typeInference = typeMap.computeIfAbsent(fieldName, key -> new FieldTypeInference()); + final String formattedCellValue = dataFormatter.formatCellValue(cell); + final DataType dataType = SchemaInferenceUtil.getDataType(formattedCellValue, timeValueInference); + typeInference.addPossibleDataType(dataType); + }); + + final List<RecordField> fields = typeMap.entrySet().stream() + .map(entry -> new RecordField(entry.getKey(), entry.getValue().toDataType(), true)) + .collect(Collectors.toList()); + + return new SimpleRecordSchema(fields); + } catch (Exception e) { + throw new SchemaNotFoundException(errMsg, e); Review Comment: Done ########## nifi-nar-bundles/nifi-standard-services/nifi-record-serialization-services-bundle/nifi-record-serialization-services/src/main/java/org/apache/nifi/excel/ExcelHeaderSchemaStrategy.java: ########## @@ -0,0 +1,116 @@ +/* + * 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.context.PropertyContext; +import org.apache.nifi.logging.ComponentLog; +import org.apache.nifi.schema.access.SchemaAccessStrategy; +import org.apache.nifi.schema.access.SchemaField; +import org.apache.nifi.schema.access.SchemaNotFoundException; +import org.apache.nifi.schema.inference.FieldTypeInference; +import org.apache.nifi.schema.inference.RecordSource; +import org.apache.nifi.schema.inference.TimeValueInference; +import org.apache.nifi.serialization.DateTimeUtils; +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.io.InputStream; +import java.util.EnumSet; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Locale; +import java.util.Map; +import java.util.Set; +import java.util.stream.Collectors; +import java.util.stream.IntStream; + +public class ExcelHeaderSchemaStrategy implements SchemaAccessStrategy { + private static final Set<SchemaField> schemaFields = EnumSet.noneOf(SchemaField.class); + + private final PropertyContext context; + + private final DataFormatter dataFormatter; + + private final ComponentLog logger; + + public ExcelHeaderSchemaStrategy(PropertyContext context, ComponentLog logger) { + this(context, logger, null); + } + + public ExcelHeaderSchemaStrategy(PropertyContext context, ComponentLog logger, Locale locale) { + this.context = context; + this.logger = logger; + this.dataFormatter = locale == null ? new DataFormatter() : new DataFormatter(locale); + } + + @Override + public RecordSchema getSchema(Map<String, String> variables, InputStream contentStream, RecordSchema readSchema) throws SchemaNotFoundException, IOException { + if (this.context == null) { + throw new SchemaNotFoundException("Schema Access Strategy intended only for validation purposes and cannot obtain schema"); + } + + String errMsg = "Failed to read Header line from Excel worksheet"; + RecordSource<Row> recordSource; + try { + recordSource = new ExcelRecordSource(contentStream, context, variables, logger); + } catch (Exception e) { + throw new SchemaNotFoundException(errMsg, e); + } + + Row headerRow = recordSource.next(); + if (!ExcelUtils.hasCells(headerRow)) { + throw new SchemaNotFoundException("The chosen header line in the Excel worksheet had no cells"); + } + + try { + String dateFormat = context.getProperty(DateTimeUtils.DATE_FORMAT).getValue(); + String timeFormat = context.getProperty(DateTimeUtils.TIME_FORMAT).getValue(); + String timestampFormat = context.getProperty(DateTimeUtils.TIMESTAMP_FORMAT).getValue(); + final TimeValueInference timeValueInference = new TimeValueInference(dateFormat, timeFormat, timestampFormat); + final Map<String, FieldTypeInference> typeMap = new LinkedHashMap<>(); + IntStream.range(0, headerRow.getLastCellNum()) + .forEach(index -> { + final Cell cell = headerRow.getCell(index); + final String fieldName = Integer.toString(index); Review Comment: Done -- This is an automated message from the Apache Git Service. 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