feat: add UUID string converter (#1017)

fesod-sheet/src/main/java/org/apache/fesod/sheet/converters/DefaultConverterLoader.java

@@ -78,6 +78,7 @@
 import org.apache.fesod.sheet.converters.string.StringNumberConverter;
 import org.apache.fesod.sheet.converters.string.StringStringConverter;
 import org.apache.fesod.sheet.converters.url.UrlImageConverter;
+import org.apache.fesod.sheet.converters.uuid.UUIDStringConverter;
 
 /**
  * Load default handler
@@ -147,6 +148,7 @@ private static void initAllConverter() {
         putAllConverter(new StringNumberConverter());
         putAllConverter(new StringStringConverter());
         putAllConverter(new StringErrorConverter());
+        putAllConverter(new UUIDStringConverter());
         allConverter = Collections.unmodifiableMap(allConverter);
     }
 
@@ -171,6 +173,7 @@ private static void initDefaultWriteConverter() {
         putWriteConverter(new ByteArrayImageConverter());
         putWriteConverter(new BoxingByteArrayImageConverter());
         putWriteConverter(new UrlImageConverter());
+        putWriteConverter(new UUIDStringConverter());
 
         // In some cases, it must be converted to string
         putWriteStringConverter(new BigDecimalStringConverter());
@@ -187,6 +190,7 @@ private static void initDefaultWriteConverter() {
         putWriteStringConverter(new LongStringConverter());
         putWriteStringConverter(new ShortStringConverter());
         putWriteStringConverter(new StringStringConverter());
+        putWriteStringConverter(new UUIDStringConverter());
         defaultWriteConverter = Collections.unmodifiableMap(defaultWriteConverter);
     }
 

fesod-sheet/src/main/java/org/apache/fesod/sheet/converters/uuid/UUIDStringConverter.java

@@ -0,0 +1,59 @@
+/*
+ * 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.fesod.sheet.converters.uuid;
+
+import java.util.UUID;
+import org.apache.fesod.common.util.StringUtils;
+import org.apache.fesod.sheet.converters.Converter;
+import org.apache.fesod.sheet.enums.CellDataTypeEnum;
+import org.apache.fesod.sheet.metadata.GlobalConfiguration;
+import org.apache.fesod.sheet.metadata.data.ReadCellData;
+import org.apache.fesod.sheet.metadata.data.WriteCellData;
+import org.apache.fesod.sheet.metadata.property.ExcelContentProperty;
+
+/**
+ * Converts UUID values to canonical lowercase strings and reads strings using {@link UUID#fromString(String)}.
+ * Blank strings are treated as missing values, like blank cells. Leading and trailing whitespace is trimmed before parsing.
+ */
+public class UUIDStringConverter implements Converter<UUID> {
+
+    @Override
+    public Class<UUID> supportJavaTypeKey() {
+        return UUID.class;
+    }
+
+    @Override
+    public CellDataTypeEnum supportExcelTypeKey() {
+        return CellDataTypeEnum.STRING;
+    }
+
+    @Override
+    public UUID convertToJavaData(
+            ReadCellData<?> cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) {
+        String value = cellData.getStringValue();
+        return StringUtils.isBlank(value) ? null : UUID.fromString(value.trim());
+    }
+
+    @Override
+    public WriteCellData<?> convertToExcelData(
+            UUID value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) {
+        return new WriteCellData<>(value.toString());
+    }
+}

fesod-sheet/src/test/java/org/apache/fesod/sheet/converter/UuidConverterTest.java

@@ -0,0 +1,183 @@
+/*
+ * 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.fesod.sheet.converter;
+
+import java.io.File;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Locale;
+import java.util.UUID;
+import lombok.Data;
+import org.apache.fesod.sheet.converters.ConverterKeyBuild;
+import org.apache.fesod.sheet.converters.DefaultConverterLoader;
+import org.apache.fesod.sheet.converters.uuid.UUIDStringConverter;
+import org.apache.fesod.sheet.enums.CellDataTypeEnum;
+import org.apache.fesod.sheet.exception.ExcelDataConvertException;
+import org.apache.fesod.sheet.metadata.GlobalConfiguration;
+import org.apache.fesod.sheet.metadata.data.ReadCellData;
+import org.apache.fesod.sheet.metadata.data.WriteCellData;
+import org.apache.fesod.sheet.testkit.Tags;
+import org.apache.fesod.sheet.testkit.base.AbstractExcelTest;
+import org.apache.fesod.sheet.testkit.enums.ExcelFormat;
+import org.apache.fesod.sheet.testkit.helpers.RoundTripHelper;
+import org.apache.fesod.sheet.testkit.params.ExcelFormatSource;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.NullSource;
+import org.junit.jupiter.params.provider.ValueSource;
+
+@Tag(Tags.ROUND_TRIP)
+class UuidConverterTest extends AbstractExcelTest {
+
+    private static final String TEXT = "123e4567-e89b-12d3-a456-426614174000";
+    private final UUIDStringConverter converter = new UUIDStringConverter();
+    private final GlobalConfiguration configuration = new GlobalConfiguration();
+
+    @Test
+    void supportsUuidStringsAndRegistersAllLookupPaths() {
+        Assertions.assertEquals(UUID.class, converter.supportJavaTypeKey());
+        Assertions.assertEquals(CellDataTypeEnum.STRING, converter.supportExcelTypeKey());
+        Assertions.assertInstanceOf(
+                UUIDStringConverter.class,
+                DefaultConverterLoader.loadDefaultReadConverter()
+                        .get(ConverterKeyBuild.buildKey(UUID.class, CellDataTypeEnum.STRING)));
+        Assertions.assertInstanceOf(
+                UUIDStringConverter.class,
+                DefaultConverterLoader.loadDefaultWriteConverter().get(ConverterKeyBuild.buildKey(UUID.class)));
+        Assertions.assertInstanceOf(
+                UUIDStringConverter.class,
+                DefaultConverterLoader.loadDefaultWriteConverter()
+                        .get(ConverterKeyBuild.buildKey(UUID.class, CellDataTypeEnum.STRING)));
+    }
+
+    @ParameterizedTest
+    @ValueSource(
+            strings = {
+                TEXT,
+                "123E4567-E89B-12D3-A456-426614174000",
+                "00000000-0000-0000-0000-000000000000",
+                "ffffffff-ffff-ffff-ffff-ffffffffffff"
+            })
+    void readsAndWritesCanonicalStrings(String input) {
+        UUID value = converter.convertToJavaData(new ReadCellData<>(input), null, configuration);
+        WriteCellData<?> cell = converter.convertToExcelData(value, null, configuration);
+        Assertions.assertEquals(CellDataTypeEnum.STRING, cell.getType());
+        Assertions.assertEquals(input.toLowerCase(Locale.ROOT), cell.getStringValue());
+    }
+
+    @ParameterizedTest
+    @ValueSource(
+            strings = {
+                "not-a-uuid",
+                "123e4567-e89b-12d3-a456-42661417400g",
+                "123e4567e89b12d3a456426614174000",
+                "  not-a-uuid\t",
+                "123e4567-e89b-12d3-a456-42661417 4000"
+            })
+    void rejectsInvalidInput(String input) {
+        Assertions.assertThrows(
+                IllegalArgumentException.class,
+                () -> converter.convertToJavaData(new ReadCellData<>(input), null, configuration));
+    }
+
+    @ParameterizedTest
+    @NullSource
+    @ValueSource(strings = {"", " ", "\t\r\n", "\u2003"})
+    void readsBlankStringAsMissingValue(String input) {
+        ReadCellData<String> cell = new ReadCellData<>();
+        cell.setStringValue(input);
+        Assertions.assertNull(converter.convertToJavaData(cell, null, configuration));
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {" " + TEXT, TEXT + " ", "\t" + TEXT + "\r\n"})
+    void trimsWhitespaceBeforeParsing(String input) {
+        Assertions.assertEquals(
+                UUID.fromString(TEXT), converter.convertToJavaData(new ReadCellData<>(input), null, configuration));
+    }
+
+    @ParameterizedTest
+    @ExcelFormatSource
+    void roundTripsUuidAndNullFieldsWithoutCustomRegistration(ExcelFormat format) throws Exception {
+        File file = createTempFile(format);
+        UuidData first = new UuidData();
+        first.setId(UUID.fromString(TEXT));
+        first.setLabel("populated");
+        UuidData second = new UuidData();
+        second.setLabel("null UUID");
+        List<UuidData> expected = Arrays.asList(first, second);
+        Assertions.assertEquals(expected, RoundTripHelper.writeAndRead(file, UuidData.class, expected));
+        List<StringData> strings = RoundTripHelper.read(file, StringData.class);
+        Assertions.assertEquals(TEXT, strings.get(0).getId());
+    }
+
+    @ParameterizedTest
+    @ExcelFormatSource
+    void readsUppercaseAndBlankCells(ExcelFormat format) throws Exception {
+        File file = createTempFile(format);
+        StringData first = new StringData();
+        first.setId(TEXT.toUpperCase(Locale.ROOT));
+        first.setLabel("uppercase");
+        StringData second = new StringData();
+        second.setId("");
+        second.setLabel("blank UUID");
+        StringData padded = new StringData();
+        padded.setId(" \t" + TEXT + "\r\n");
+        padded.setLabel("padded UUID");
+        StringData whitespace = new StringData();
+        whitespace.setId(" \t ");
+        whitespace.setLabel("whitespace UUID");
+        RoundTripHelper.write(file, StringData.class, Arrays.asList(first, second, padded, whitespace));
+        List<UuidData> rows = RoundTripHelper.read(file, UuidData.class);
+        Assertions.assertEquals(4, rows.size());
+        Assertions.assertEquals(UUID.fromString(TEXT), rows.get(0).getId());
+        Assertions.assertNull(rows.get(1).getId());
+        Assertions.assertEquals(UUID.fromString(TEXT), rows.get(2).getId());
+        Assertions.assertNull(rows.get(3).getId());
+    }
+
+    @ParameterizedTest
+    @ExcelFormatSource
+    void reportsInvalidCellAsConversionFailure(ExcelFormat format) throws Exception {
+        File file = createTempFile(format);
+        StringData row = new StringData();
+        row.setId("not-a-uuid");
+        row.setLabel("invalid");
+        RoundTripHelper.write(file, StringData.class, Collections.singletonList(row));
+        ExcelDataConvertException error = Assertions.assertThrows(
+                ExcelDataConvertException.class, () -> RoundTripHelper.read(file, UuidData.class));
+        Assertions.assertInstanceOf(IllegalArgumentException.class, error.getCause());
+    }
+
+    @Data
+    public static class UuidData {
+        private UUID id;
+        private String label;
+    }
+
+    @Data
+    public static class StringData {
+        private String id;
+        private String label;
+    }
+}