Add data classification endpoint support

CHANGELOG.md

@@ -5,6 +5,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [x.x.x] - unreleased
+### Added
+- Support for PUT /sheets/{sheetId}/dataclassification endpoint (Set Data Classification)
+- Support for DELETE /sheets/{sheetId}/dataclassification endpoint (Remove Data Classification)
+- Added `dataClassification` field to Sheet model
 
 ## [3.11.0] - 2026-04-30
 ### Added

src/main/java/com/smartsheet/api/SheetResources.java

@@ -17,6 +17,7 @@
 package com.smartsheet.api;
 
 import com.smartsheet.api.models.ContainerDestination;
+import com.smartsheet.api.models.DataClassification;
 import com.smartsheet.api.models.MultiRowEmail;
 import com.smartsheet.api.models.PagedResult;
 import com.smartsheet.api.models.PaginationParameters;
@@ -548,6 +549,37 @@ Sheet importXlsxInWorkspace(
      */
     void deleteSheet(long id) throws SmartsheetException;
 
+    /**
+     * <p>Sets the data classification on a sheet.</p>
+     *
+     * <p>It mirrors to the following Smartsheet REST API method: PUT /sheets/{sheetId}/dataclassification</p>
+     *
+     * @param sheetId the sheet id
+     * @param dataClassification the DataClassification object
+     * @throws IllegalArgumentException    if any argument is null or empty string
+     * @throws InvalidRequestException     if there is any problem with the REST API request
+     * @throws AuthorizationException      if there is any problem with  the REST API authorization (access token)
+     * @throws ResourceNotFoundException   if the resource cannot be found
+     * @throws ServiceUnavailableException if the REST API service is not available (possibly due to rate limiting)
+     * @throws SmartsheetException         if there is any other error during the operation
+     */
+    void setDataClassification(long sheetId, DataClassification dataClassification) throws SmartsheetException;
+
+    /**
+     * <p>Removes the data classification from a sheet. Requires ADMIN or OWNER access.</p>
+     *
+     * <p>It mirrors to the following Smartsheet REST API method: DELETE /sheets/{sheetId}/dataclassification</p>
+     *
+     * @param sheetId the sheet id
+     * @throws IllegalArgumentException    if any argument is null or empty string
+     * @throws InvalidRequestException     if there is any problem with the REST API request
+     * @throws AuthorizationException      if there is any problem with  the REST API authorization (access token)
+     * @throws ResourceNotFoundException   if the resource cannot be found
+     * @throws ServiceUnavailableException if the REST API service is not available (possibly due to rate limiting)
+     * @throws SmartsheetException         if there is any other error during the operation
+     */
+    void deleteDataClassification(long sheetId) throws SmartsheetException;
+
     /**
      * <p>Update a sheet.</p>
      *

src/main/java/com/smartsheet/api/internal/SheetResourcesImpl.java

@@ -42,6 +42,7 @@
 import com.smartsheet.api.internal.util.QueryUtil;
 import com.smartsheet.api.internal.util.Util;
 import com.smartsheet.api.models.ContainerDestination;
+import com.smartsheet.api.models.DataClassification;
 import com.smartsheet.api.models.MultiRowEmail;
 import com.smartsheet.api.models.PagedResult;
 import com.smartsheet.api.models.PaginationParameters;
@@ -806,6 +807,42 @@ public void deleteSheet(long id) throws SmartsheetException {
         this.deleteResource(SHEETS + "/" + id, Sheet.class);
     }
 
+    /**
+     * Sets the data classification on a sheet.
+     * <p>
+     * It mirrors to the following Smartsheet REST API method: PUT /sheets/{sheetId}/dataclassification
+     *
+     * @param sheetId the sheet id
+     * @param dataClassification the DataClassification object
+     * @throws IllegalArgumentException    : if any argument is null
+     * @throws InvalidRequestException     : if there is any problem with the REST API request
+     * @throws AuthorizationException      : if there is any problem with the REST API authorization(access token)
+     * @throws ResourceNotFoundException   : if the resource can not be found
+     * @throws ServiceUnavailableException : if the REST API service is not available (possibly due to rate limiting)
+     * @throws SmartsheetRestException     : if there is any other REST API related error occurred during the operation
+     * @throws SmartsheetException         : if there is any other error occurred during the operation
+     */
+    public void setDataClassification(long sheetId, DataClassification dataClassification) throws SmartsheetException {
+        this.updateResource(SHEETS + "/" + sheetId + "/dataclassification", DataClassification.class, dataClassification);
+    }
+
+    /**
+     * Removes the data classification from a sheet. Requires ADMIN or OWNER access.
+     * <p>
+     * It mirrors to the following Smartsheet REST API method: DELETE /sheets/{sheetId}/dataclassification
+     *
+     * @param sheetId the sheet id
+     * @throws InvalidRequestException     : if there is any problem with the REST API request
+     * @throws AuthorizationException      : if there is any problem with the REST API authorization(access token)
+     * @throws ResourceNotFoundException   : if the resource can not be found
+     * @throws ServiceUnavailableException : if the REST API service is not available (possibly due to rate limiting)
+     * @throws SmartsheetRestException     : if there is any other REST API related error occurred during the operation
+     * @throws SmartsheetException         : if there is any other error occurred during the operation
+     */
+    public void deleteDataClassification(long sheetId) throws SmartsheetException {
+        this.deleteResource(SHEETS + "/" + sheetId + "/dataclassification", DataClassification.class);
+    }
+
     /**
      * Update a sheet.
      * <p>

src/main/java/com/smartsheet/api/models/AbstractSheet.java

@@ -19,6 +19,7 @@
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.smartsheet.api.models.enums.AccessLevel;
 import com.smartsheet.api.models.enums.AttachmentType;
+import com.smartsheet.api.models.enums.DataClassificationType;
 import com.smartsheet.api.models.enums.ResourceManagementType;
 
 import java.util.Date;
@@ -76,6 +77,11 @@ public abstract class AbstractSheet<TRow extends AbstractRow<TColumn, TCell>, TC
      */
     private Boolean dependenciesEnabled;
 
+    /**
+     * Represents the data classification of the sheet.
+     */
+    private DataClassificationType dataClassification;
+
     /**
      * Represents the discussions for the sheet.
      */
@@ -367,6 +373,26 @@ public <T extends AbstractSheet<TRow, TColumn, TCell>> T setDependenciesEnabled(
         return (T) this;
     }
 
+    /**
+     * Gets the data classification of the sheet.
+     *
+     * @return the data classification
+     */
+    public DataClassificationType getDataClassification() {
+        return dataClassification;
+    }
+
+    /**
+     * Sets the data classification of the sheet.
+     *
+     * @param dataClassification the data classification
+     */
+    @SuppressWarnings("unchecked")
+    public <T extends AbstractSheet<TRow, TColumn, TCell>> T setDataClassification(DataClassificationType dataClassification) {
+        this.dataClassification = dataClassification;
+        return (T) this;
+    }
+
     /**
      * Gets the discussions for the sheet.
      *

src/main/java/com/smartsheet/api/models/DataClassification.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2026 Smartsheet
+ *
+ * Licensed 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 com.smartsheet.api.models;
+
+import com.smartsheet.api.models.enums.DataClassificationType;
+
+/**
+ * Represents the data classification of a sheet.
+ */
+public class DataClassification {
+
+    private DataClassificationType dataClassification;
+
+    /**
+     * Gets the data classification.
+     *
+     * @return the data classification
+     */
+    public DataClassificationType getDataClassification() {
+        return dataClassification;
+    }
+
+    /**
+     * Sets the data classification.
+     *
+     * @param dataClassification the data classification
+     * @return this DataClassification object for chaining
+     */
+    public DataClassification setDataClassification(DataClassificationType dataClassification) {
+        this.dataClassification = dataClassification;
+        return this;
+    }
+}

src/main/java/com/smartsheet/api/models/enums/DataClassificationType.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2026 Smartsheet
+ *
+ * Licensed 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 com.smartsheet.api.models.enums;
+
+/**
+ * Represents the data classification level of a sheet.
+ */
+public enum DataClassificationType {
+    PUBLIC,
+    INTERNAL,
+    CONFIDENTIAL,
+    SECRET,
+}

src/test/java/com/smartsheet/api/sdktest/sheets/CommonTestConstants.java

@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2025 Smartsheet
+ *
+ * Licensed 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 com.smartsheet.api.sdktest.sheets;
+
+public class CommonTestConstants {
+    public static final long TEST_SHEET_ID = 1234567890123456L;
+}

src/test/java/com/smartsheet/api/sdktest/sheets/TestDeleteDataClassification.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2025 Smartsheet
+ *
+ * Licensed 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 com.smartsheet.api.sdktest.sheets;
+
+import com.github.tomakehurst.wiremock.verification.LoggedRequest;
+import com.smartsheet.api.Smartsheet;
+import com.smartsheet.api.SmartsheetException;
+import com.smartsheet.api.WiremockClient;
+import com.smartsheet.api.WiremockClientWrapper;
+import com.smartsheet.api.sdktest.Utils;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.net.URI;
+import java.util.UUID;
+
+import static com.smartsheet.api.sdktest.sheets.CommonTestConstants.TEST_SHEET_ID;
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class TestDeleteDataClassification {
+
+    @Test
+    void testDeleteDataClassificationGeneratedUrlIsCorrect() throws SmartsheetException {
+        String requestId = UUID.randomUUID().toString();
+        WiremockClientWrapper wrapper = Utils.createWiremockSmartsheetClient(
+                "/sheets/delete-data-classification/all-response-body-properties",
+                requestId
+        );
+        Smartsheet smartsheet = wrapper.getSmartsheet();
+        WiremockClient wiremockClient = wrapper.getWiremockClient();
+
+        smartsheet.sheetResources().deleteDataClassification(TEST_SHEET_ID);
+        LoggedRequest wiremockRequest = wiremockClient.findWiremockRequest(requestId);
+        String path = URI.create(wiremockRequest.getUrl()).getPath();
+
+        assertThat(path).isEqualTo("/2.0/sheets/" + TEST_SHEET_ID + "/dataclassification");
+    }
+
+    @Test
+    void testDeleteDataClassificationAllResponseBodyProperties() {
+        String requestId = UUID.randomUUID().toString();
+        WiremockClientWrapper wrapper = Utils.createWiremockSmartsheetClient(
+                "/sheets/delete-data-classification/all-response-body-properties",
+                requestId
+        );
+        Smartsheet smartsheet = wrapper.getSmartsheet();
+
+        Assertions.assertDoesNotThrow(() ->
+                smartsheet.sheetResources().deleteDataClassification(TEST_SHEET_ID)
+        );
+    }
+
+    @Test
+    void testDeleteDataClassificationError500Response() {
+        String requestId = UUID.randomUUID().toString();
+        WiremockClientWrapper wrapper = Utils.createWiremockSmartsheetClient("/errors/500-response", requestId);
+        Smartsheet smartsheet = wrapper.getSmartsheet();
+
+        SmartsheetException exception = Assertions.assertThrows(SmartsheetException.class, () ->
+                smartsheet.sheetResources().deleteDataClassification(TEST_SHEET_ID)
+        );
+
+        assertThat(exception.getMessage()).isEqualTo("Internal Server Error");
+    }
+
+    @Test
+    void testDeleteDataClassificationError400Response() {
+        String requestId = UUID.randomUUID().toString();
+        WiremockClientWrapper wrapper = Utils.createWiremockSmartsheetClient("/errors/400-response", requestId);
+        Smartsheet smartsheet = wrapper.getSmartsheet();
+
+        SmartsheetException exception = Assertions.assertThrows(SmartsheetException.class, () ->
+                smartsheet.sheetResources().deleteDataClassification(TEST_SHEET_ID)
+        );
+
+        assertThat(exception.getMessage()).isEqualTo("Malformed Request");
+    }
+}