AAS Thumbnail operations

basyx.aasrepository/basyx.aasrepository-backend-inmemory/pom.xml

@@ -1,5 +1,6 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 
 	<parent>

basyx.aasrepository/basyx.aasrepository-backend-inmemory/src/main/java/org/eclipse/digitaltwin/basyx/aasrepository/backend/inmemory/AasInMemoryBackend.java

@@ -111,5 +111,7 @@ public void deleteAll(Iterable<? extends AssetAdministrationShell> entities) {
 	public void deleteAll() {
 		inMemoryStore.clear();
 	}
+
+
 }
 

basyx.aasrepository/basyx.aasrepository-backend-inmemory/src/test/java/org/eclipse/digitaltwin/basyx/aasrepository/backend/inmemory/TestInMemoryAasRepository.java

@@ -33,7 +33,6 @@
 import org.eclipse.digitaltwin.basyx.aasrepository.backend.AasBackendProvider;
 import org.eclipse.digitaltwin.basyx.aasrepository.backend.CrudAasRepository;
 import org.eclipse.digitaltwin.basyx.aasrepository.backend.SimpleAasRepositoryFactory;
-import org.eclipse.digitaltwin.basyx.aasrepository.backend.inmemory.AasInMemoryBackendProvider;
 import org.eclipse.digitaltwin.basyx.aasservice.backend.InMemoryAasServiceFactory;
 import org.junit.Test;
 

basyx.aasrepository/basyx.aasrepository-backend/pom.xml

@@ -20,5 +20,9 @@
 		    <groupId>org.springframework.data</groupId>
 		    <artifactId>spring-data-commons</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>commons-io</groupId>
+			<artifactId>commons-io</artifactId>
+		</dependency>
 	</dependencies>
 </project>

basyx.aasrepository/basyx.aasrepository-backend/src/main/java/org/eclipse/digitaltwin/basyx/aasrepository/backend/CrudAasRepository.java

@@ -24,6 +24,8 @@
  ******************************************************************************/
 package org.eclipse.digitaltwin.basyx.aasrepository.backend;
 
+import java.io.File;
+import java.io.InputStream;
 import java.util.List;
 import java.util.TreeMap;
 import java.util.stream.Collectors;
@@ -32,6 +34,7 @@
 import org.eclipse.digitaltwin.aas4j.v3.model.AssetAdministrationShell;
 import org.eclipse.digitaltwin.aas4j.v3.model.AssetInformation;
 import org.eclipse.digitaltwin.aas4j.v3.model.Reference;
+import org.eclipse.digitaltwin.aas4j.v3.model.Resource;
 import org.eclipse.digitaltwin.basyx.aasrepository.AasRepository;
 import org.eclipse.digitaltwin.basyx.aasservice.AasService;
 import org.eclipse.digitaltwin.basyx.aasservice.AasServiceFactory;
@@ -45,9 +48,10 @@
 import org.springframework.data.repository.CrudRepository;
 
 /**
- * Default Implementation for the {@link AasRepository} based on Spring {@link CrudRepository}
+ * Default Implementation for the {@link AasRepository} based on Spring
+ * {@link CrudRepository}
  * 
- * @author mateusmolina, despen
+ * @author mateusmolina, despen, zhangzai
  *
  */
 public class CrudAasRepository implements AasRepository {
@@ -57,15 +61,15 @@ public class CrudAasRepository implements AasRepository {
 	private AasServiceFactory aasServiceFactory;
 
 	private String aasRepositoryName = null;
-	
+
 	public CrudAasRepository(AasBackendProvider aasBackendProvider, AasServiceFactory aasServiceFactory) {
 		this.aasBackend = aasBackendProvider.getCrudRepository();
 		this.aasServiceFactory = aasServiceFactory;
 	}
 
 	public CrudAasRepository(AasBackendProvider aasBackendProvider, AasServiceFactory aasServiceFactory, @Value("${basyx.aasrepo.name:aas-repo}") String aasRepositoryName) {
 		this(aasBackendProvider, aasServiceFactory);
-		
+
 		this.aasRepositoryName = aasRepositoryName;
 	}
 
@@ -175,4 +179,62 @@ public String getName() {
 		return aasRepositoryName == null ? AasRepository.super.getName() : aasRepositoryName;
 	}
 
+	@Override
+	public File getThumbnail(String aasId) {
+		Resource resource = getAssetInformation(aasId).getDefaultThumbnail();
+
+		ThumbnailHandler.throwIfFileDoesNotExist(aasId, resource);
+		String filePath = resource.getPath();
+		return new File(filePath);
+	}
+
+	@Override
+	public void setThumbnail(String aasId, String fileName, String contentType, InputStream inputStream) {
+		Resource thumbnail = getAssetInformation(aasId).getDefaultThumbnail();
+
+		if (thumbnail != null) {
+			updateThumbnailFile(aasId, fileName, contentType, inputStream, thumbnail);
+			return;
+		}
+
+		String filePath = createFile(aasId, fileName, inputStream);
+		ThumbnailHandler.setNewThumbnail(this, aasId, contentType, filePath);
+	}
+
+	private void updateThumbnailFile(String aasId, String fileName, String contentType, InputStream inputStream, Resource thumbnail) {
+		String path = thumbnail.getPath();
+		ThumbnailHandler.deleteExistingFile(path);
+		String filePath = createFile(aasId, fileName, inputStream);
+		ThumbnailHandler.updateThumbnail(this, aasId, contentType, filePath);
+	}
+
+	private String createFile(String aasId, String fileName, InputStream inputStream) {
+		String filePath = ThumbnailHandler.createFilePath(ThumbnailHandler.getTemporaryDirectoryPath(), aasId, fileName);
+		ThumbnailHandler.createFileAtSpecifiedPath(fileName, inputStream, filePath);
+		return filePath;
+	}
+
+	@Override
+	public void deleteThumbnail(String aasId) {
+		Resource thumbnail = getAssetInformation(aasId).getDefaultThumbnail();
+		ThumbnailHandler.throwIfFileDoesNotExist(aasId, thumbnail);
+
+		deleteThumbnailFile(thumbnail);
+
+		updateThumbnailInAssetInformation(aasId);
+	}
+
+	private void updateThumbnailInAssetInformation(String aasId) {
+		AssetInformation assetInfor = getAssetInformation(aasId);
+		assetInfor.getDefaultThumbnail().setContentType("");
+		assetInfor.getDefaultThumbnail().setPath("");
+		setAssetInformation(aasId, assetInfor);
+	}
+
+	private void deleteThumbnailFile(Resource thumbnail) {
+		String filePath = thumbnail.getPath();
+		java.io.File tmpFile = new java.io.File(filePath);
+		tmpFile.delete();
+	}
+
 }

basyx.aasrepository/basyx.aasrepository-backend/src/main/java/org/eclipse/digitaltwin/basyx/aasrepository/backend/ThumbnailHandler.java

@@ -0,0 +1,117 @@
+/*******************************************************************************
+ * Copyright (C) 2023 the Eclipse BaSyx Authors
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ * SPDX-License-Identifier: MIT
+ ******************************************************************************/
+
+package org.eclipse.digitaltwin.basyx.aasrepository.backend;
+
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.InvalidPathException;
+import java.nio.file.Paths;
+
+import org.apache.commons.io.IOUtils;
+import org.eclipse.digitaltwin.aas4j.v3.model.AssetInformation;
+import org.eclipse.digitaltwin.aas4j.v3.model.Resource;
+import org.eclipse.digitaltwin.aas4j.v3.model.impl.DefaultResource;
+import org.eclipse.digitaltwin.basyx.aasrepository.AasRepository;
+import org.eclipse.digitaltwin.basyx.core.exceptions.FileDoesNotExistException;
+import org.eclipse.digitaltwin.basyx.core.exceptions.FileHandlingException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ThumbnailHandler {
+
+	private static Logger logger = LoggerFactory.getLogger(ThumbnailHandler.class);
+
+	public static void updateThumbnail(AasRepository aasRepo, String aasId, String contentType, String filePath) {
+		AssetInformation assetInfor = aasRepo.getAssetInformation(aasId);
+		assetInfor.getDefaultThumbnail().setContentType(contentType);
+		assetInfor.getDefaultThumbnail().setPath(filePath);
+		aasRepo.setAssetInformation(aasId, assetInfor);
+	}
+
+	public static void setNewThumbnail(AasRepository aasRepo, String aasId, String contentType, String filePath) {
+		Resource resource = new DefaultResource();
+		resource.setContentType(contentType);
+		resource.setPath(filePath);
+		AssetInformation assetInfor = aasRepo.getAssetInformation(aasId);
+		assetInfor.setDefaultThumbnail(resource);
+		aasRepo.setAssetInformation(aasId, assetInfor);
+	}
+
+	public static void throwIfFileDoesNotExist(String aasId, Resource resource) {
+		if (resource == null)
+			throw new FileDoesNotExistException(aasId);
+
+		String filePath = resource.getPath();
+		throwIfFilePathIsNotValid(aasId, filePath);
+	}
+
+	private static void throwIfFilePathIsNotValid(String aasId, String filePath) {
+		if (filePath.isEmpty())
+			throw new FileDoesNotExistException(aasId);
+		try {
+			Paths.get(filePath);
+		} catch (InvalidPathException | NullPointerException ex) {
+			throw new FileDoesNotExistException(aasId);
+		}
+	}
+
+	public static String createFilePath(String tmpDirectory, String aasId, String fileName) {
+		return tmpDirectory + "/" + aasId + "-" + "Thumbnail" + "-" + fileName;
+	}
+
+	public static void createFileAtSpecifiedPath(String fileName, InputStream inputStream, String filePath) {
+		java.io.File targetFile = new java.io.File(filePath);
+
+		try (FileOutputStream outStream = new FileOutputStream(targetFile)) {
+			IOUtils.copy(inputStream, outStream);
+		} catch (IOException e) {
+			throw new FileHandlingException(fileName);
+		}
+	}
+
+	public static void deleteExistingFile(String path) {
+		if (path == null || path.isEmpty())
+			return;
+
+		try {
+			Files.deleteIfExists(Paths.get(path, ""));
+		} catch (IOException e) {
+			logger.error("Unable to delete the file having path '{}'", path);
+		}
+	}
+
+	public static String getTemporaryDirectoryPath() {
+		String tempDirectoryPath = "";
+		try {
+			tempDirectoryPath = Files.createTempDirectory("basyx-temp-thumbnail").toAbsolutePath().toString();
+		} catch (IOException e) {
+			logger.error("Unable to create file in the temporary path.");
+		}
+		return tempDirectoryPath;
+	}
+}

basyx.aasrepository/basyx.aasrepository-core/pom.xml

@@ -1,5 +1,6 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 
 	<parent>
@@ -11,6 +12,11 @@
 	<artifactId>basyx.aasrepository-core</artifactId>
 
 	<dependencies>
+		<dependency>
+			<groupId>commons-io</groupId>
+			<artifactId>commons-io</artifactId>
+			<scope>test</scope>
+		</dependency>
 		<dependency>
 			<groupId>org.eclipse.digitaltwin.basyx</groupId>
 			<artifactId>basyx.core</artifactId>

basyx.aasrepository/basyx.aasrepository-core/src/main/java/org/eclipse/digitaltwin/basyx/aasrepository/AasRepository.java

@@ -24,6 +24,8 @@
  ******************************************************************************/
 package org.eclipse.digitaltwin.basyx.aasrepository;
 
+import java.io.File;
+import java.io.InputStream;
 import java.util.List;
 
 import org.eclipse.digitaltwin.aas4j.v3.model.AssetAdministrationShell;
@@ -121,6 +123,37 @@ public interface AasRepository {
 	 * @return the requested AAS
 	 */
 	public AssetInformation getAssetInformation(String aasId) throws ElementDoesNotExistException;
+
+	/**
+	 * Get Thumbnail of the specific aas
+	 * 
+	 * @param aasID
+	 *            the id of the AAS
+	 * @return the file of the thumbnail
+	 */
+	public File getThumbnail(String aasId);
+
+	/**
+	 * Set Thumbnail of the AAS
+	 * 
+	 * @param aasID
+	 *            the id of the AAS
+	 * @param fileName
+	 *            name of the thumbnail file with extension
+	 * @param contentType
+	 *            content type of the file
+	 * @param inputStream
+	 *            inputstream of the thumbnail file
+	 */
+	public void setThumbnail(String aasId, String fileName, String contentType, InputStream inputStream);
+
+	/**
+	 * Delete the thumbnail file of the AAS
+	 * 
+	 * @param aasId
+	 *            the id of the AAS
+	 */
+	public void deleteThumbnail(String aasId);
 
 	/**
 	 * Returns the name of the repository