server: Create bookmarks file for experiments

The bookmarks file can be used to store and retrieve markers associated
with an experiment using platform APIs.

It can later be obtained for an opened experiment with:
TmfTraceManager.getInstance().getTraceEditorFile(experiment)

Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>

Author: PatrickTasse

trace-server/org.eclipse.tracecompass.incubator.trace.server.jersey.rest.core/src/org/eclipse/tracecompass/incubator/internal/trace/server/jersey/rest/core/services/ExperimentManagerService.java

@@ -19,6 +19,7 @@
 import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.IOException;
+import java.io.InputStream;
 import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -103,6 +104,8 @@ public class ExperimentManagerService {
     private static final String EXPERIMENTS_FOLDER = "Experiments"; //$NON-NLS-1$
     private static final String TRACES_FOLDER = "Traces"; //$NON-NLS-1$
     private static final String SUFFIX = "_exp"; //$NON-NLS-1$
+    private static final String BOOKMARKS_HIDDEN_FILE = ".bookmarks"; //$NON-NLS-1$
+    private static final String EXPERIMENT_EDITOR_INPUT_TYPE = "editorInputType.experiment"; //$NON-NLS-1$
 
     /**
      * Getter for the list of experiments from the trace manager
@@ -374,7 +377,7 @@ public Response postExperiment(@RequestBody(content = {
                 experiment.getNext(ctx);
                 ctx.dispose();
 
-                TmfSignalManager.dispatchSignal(new TmfTraceOpenedSignal(ExperimentManagerService.class, experiment, null));
+                TmfSignalManager.dispatchSignal(new TmfTraceOpenedSignal(ExperimentManagerService.class, experiment, createBookmarksFile(resource)));
 
                 EXPERIMENTS.put(expUUID, experiment);
                 TRACE_INSTANCES.put(expUUID, uuidToTraceInstances);
@@ -495,6 +498,24 @@ private static void createSupplementaryFolder(IResource experimentResource) {
         }
     }
 
+    private static IFile createBookmarksFile(IResource resource) {
+        IFile file = ((IFolder) resource).getFile(resource.getName() + '_');
+        try {
+            if (!file.exists()) {
+                final IFile bookmarksFile = ((IFolder) resource.getParent()).getFile(BOOKMARKS_HIDDEN_FILE);
+                if (!bookmarksFile.exists()) {
+                    final InputStream source = new ByteArrayInputStream(new byte[0]);
+                    bookmarksFile.create(source, IResource.FORCE | IResource.HIDDEN, new NullProgressMonitor());
+                }
+                file.createLink(bookmarksFile.getLocation(), IResource.REPLACE | IResource.HIDDEN, new NullProgressMonitor());
+            }
+            file.setPersistentProperty(TmfCommonConstants.TRACETYPE, EXPERIMENT_EDITOR_INPUT_TYPE);
+        } catch (CoreException e) {
+            Activator.getInstance().logWarning("Error creating bookmarks file", e); //$NON-NLS-1$
+        }
+        return file;
+    }
+
     private static void createFolder(IFolder folder) throws CoreException {
         if (!folder.exists()) {
             if (folder.getParent() instanceof IFolder) {