#9741 Load ERD from external file fix (NPE)

plugins/org.jkiss.dbeaver.erd.ui/src/org/jkiss/dbeaver/erd/ui/editor/ERDEditorStandalone.java

@@ -43,6 +43,8 @@ import org.jkiss.dbeaver.ui.navigator.NavigatorPreferences;
 import org.jkiss.dbeaver.utils.RuntimeUtils;
 
 import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.FileInputStream;
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 import java.util.ResourceBundle;
@@ -175,19 +177,21 @@ public class ERDEditorStandalone extends ERDEditorPart implements IResourceChang
     private EntityDiagram loadContentFromFile(DBRProgressMonitor progressMonitor)
         throws DBException
     {
-        final IFile file = getEditorFile();
+        IFile resFile = getEditorFile();
+        IProject project = resFile == null ? DBWorkbench.getPlatform().getWorkspace().getActiveProject().getEclipseProject() : resFile.getProject();
+        final File localFile = EditorUtils.getLocalFileFromInput(getEditorInput());
 
         final DiagramPart diagramPart = getDiagramPart();
-        EntityDiagram entityDiagram = new EntityDiagram(null, file.getName(), getContentProvider(), getDecorator());
+        EntityDiagram entityDiagram = new EntityDiagram(null, localFile.getName(), getContentProvider(), getDecorator());
         entityDiagram.clear();
         entityDiagram.setLayoutManualAllowed(true);
         entityDiagram.setLayoutManualDesired(true);
         diagramPart.setModel(entityDiagram);
 
-        try (final InputStream fileContent = file.getContents()) {
-            DiagramLoader.load(progressMonitor, file.getProject(), diagramPart, fileContent);
+        try (final InputStream fileContent = new FileInputStream(localFile)) {
+            DiagramLoader.load(progressMonitor, project, diagramPart, fileContent);
         } catch (Exception e) {
-            log.error("Error loading ER diagram from '" + file.getName() + "'", e);
+            log.error("Error loading ER diagram from '" + localFile.getName() + "'", e);
         }
 
         return entityDiagram;