chore: add DatabaseDataSourceView (#913)

* chore: add DatabaseDataSourceView

* docs: update CHANGELOG.md

CHANGELOG.md

@@ -4,6 +4,9 @@ All notable changes to this project will be documented in this file.
 
 ## [x.x.x] - 2022-xx-xx
 
+### Added
+- Add custom view for `DatabaseDataSource` to display URL and driver class.
+
 ### Changed
 - Update swagger-annotations version from 1.6.4 to 1.6.5.
 

src/main/java/io/dataspaceconnector/controller/resource/view/datasource/DataSourceViewAssembler.java

@@ -19,6 +19,7 @@
 import io.dataspaceconnector.controller.resource.view.util.SelfLinking;
 import io.dataspaceconnector.controller.resource.view.util.SelfLinkHelper;
 import io.dataspaceconnector.model.datasource.DataSource;
+import io.dataspaceconnector.model.datasource.DatabaseDataSource;
 import org.modelmapper.ModelMapper;
 import org.springframework.hateoas.Link;
 import org.springframework.hateoas.server.RepresentationModelAssembler;
@@ -41,7 +42,13 @@ public final Link getSelfLink(final UUID entityId) {
     @Override
     public final DataSourceView toModel(final DataSource dataSource) {
         final var modelMapper = new ModelMapper();
-        final var view = modelMapper.map(dataSource, DataSourceView.class);
+        DataSourceView view;
+        if (dataSource instanceof DatabaseDataSource) {
+            view = modelMapper.map(dataSource, DatabaseDataSourceView.class);
+        } else {
+            view = modelMapper.map(dataSource, DataSourceView.class);
+        }
+
         view.add(getSelfLink(dataSource.getId()));
 
         return view;

src/main/java/io/dataspaceconnector/controller/resource/view/datasource/DatabaseDataSourceView.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2020 Fraunhofer Institute for Software and Systems Engineering
+ *
+ * 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 io.dataspaceconnector.controller.resource.view.datasource;
+
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * A DTO for controlled exposing of database data source information in API responses.
+ */
+@Getter
+@Setter
+@EqualsAndHashCode(callSuper = true)
+public class DatabaseDataSourceView extends DataSourceView {
+
+    /**
+     * JDBC URL of the database.
+     */
+    private String url;
+
+    /**
+     * Name of the driver class to use for connecting to the database.
+     */
+    private String driverClassName;
+
+}