Improve desktop UI

sdmx-dl-desktop/pom.xml

@@ -106,6 +106,10 @@
             <artifactId>miglayout-swing</artifactId>
             <version>5.3</version>
         </dependency>
+        <dependency>
+            <groupId>com.github.nbbrd.java-io-util</groupId>
+            <artifactId>java-io-xml-bind</artifactId>
+        </dependency>
 
         <!-- runtime only -->
         <dependency>

sdmx-dl-desktop/src/main/java/internal/sdmxdl/desktop/XmlDataSourceRef.java

@@ -0,0 +1,72 @@
+package internal.sdmxdl.desktop;
+
+import nbbrd.io.xml.Xml;
+import nbbrd.io.xml.bind.Jaxb;
+import sdmxdl.Languages;
+import sdmxdl.desktop.DataSourceRef;
+
+import javax.xml.bind.annotation.XmlRootElement;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import static java.util.Collections.emptyList;
+
+public final class XmlDataSourceRef {
+
+    private XmlDataSourceRef() {
+        throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
+    }
+
+    public static final Xml.Parser<List<DataSourceRef>> PARSER = Jaxb.Parser.of(DataSourceBeans.class).andThen(DataSourceBeans::to);
+    public static final Xml.Formatter<List<DataSourceRef>> FORMATTER = Jaxb.Formatter.of(DataSourceBeans.class).compose(DataSourceBeans::from);
+
+    @XmlRootElement
+    @lombok.Data
+    public static class DataSourceBeans {
+
+        List<DataSourceBean> list;
+
+        static DataSourceBeans from(List<DataSourceRef> list) {
+            DataSourceBeans result = new DataSourceBeans();
+            result.list = list.stream().map(DataSourceBean::from).collect(Collectors.toList());
+            return result;
+        }
+
+        List<DataSourceRef> to() {
+            return list != null ? list.stream().map(DataSourceBean::to).collect(Collectors.toList()) : emptyList();
+        }
+    }
+
+
+    @XmlRootElement
+    @lombok.Data
+    public static class DataSourceBean {
+
+        String source;
+        String catalog;
+        String flow;
+        List<String> dimensions;
+        String languages;
+
+        static DataSourceBean from(DataSourceRef ref) {
+            DataSourceBean result = new DataSourceBean();
+            result.source = ref.getSource();
+            result.catalog = ref.getCatalog();
+            result.flow = ref.getFlow();
+            result.dimensions = ref.getDimensions();
+            result.languages = ref.getLanguages().toString();
+            return result;
+        }
+
+        DataSourceRef to() {
+            return DataSourceRef
+                    .builder()
+                    .source(source)
+                    .catalog(catalog)
+                    .flow(flow)
+                    .dimensions(dimensions != null ? dimensions : emptyList())
+                    .languages(Languages.parse(languages))
+                    .build();
+        }
+    }
+}