root / web_client / src / gr / grnet / pithos / web / client / foldertree / FolderTreeViewModel.java @ fa5600f7
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/*
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* Copyright 2011 GRNET S.A. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and
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* documentation are those of the authors and should not be
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* interpreted as representing official policies, either expressed
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* or implied, of GRNET S.A.
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*/
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package gr.grnet.pithos.web.client.foldertree; |
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import com.google.gwt.cell.client.AbstractCell; |
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import com.google.gwt.cell.client.Cell; |
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import com.google.gwt.core.client.GWT; |
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import com.google.gwt.core.client.Scheduler; |
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import com.google.gwt.core.client.Scheduler.ScheduledCommand; |
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import com.google.gwt.event.dom.client.ContextMenuEvent; |
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import com.google.gwt.safehtml.shared.SafeHtmlBuilder; |
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import com.google.gwt.user.client.ui.AbstractImagePrototype; |
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import com.google.gwt.view.client.ListDataProvider; |
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import com.google.gwt.view.client.SingleSelectionModel; |
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import com.google.gwt.view.client.TreeViewModel; |
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import gr.grnet.pithos.web.client.FolderContextMenu; |
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import gr.grnet.pithos.web.client.GSS; |
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import gr.grnet.pithos.web.client.foldertree.FolderTreeView.Templates; |
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import gr.grnet.pithos.web.client.rest.GetRequest; |
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import gr.grnet.pithos.web.client.rest.RestException; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.Map; |
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import java.util.Set; |
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public class FolderTreeViewModel implements TreeViewModel { |
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private Cell<Folder> folderCell = new AbstractCell<Folder>(ContextMenuEvent.getType().getName()) { |
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@Override
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public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) { |
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String html = AbstractImagePrototype.create(FolderTreeView.images.folderYellow()).getHTML();
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safeHtmlBuilder.appendHtmlConstant(html); |
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safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(folder.getName()));
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} |
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@Override
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public void onBrowserEvent(Cell.Context context, com.google.gwt.dom.client.Element parent, Folder folder, com.google.gwt.dom.client.NativeEvent event, com.google.gwt.cell.client.ValueUpdater<Folder> valueUpdater) { |
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if (event.getType().equals(ContextMenuEvent.getType().getName())) {
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FolderTreeViewModel.this.selectionModel.setSelected(folder, true);
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FolderContextMenu menu = new FolderContextMenu(FolderTreeView.images, folder);
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menu.setPopupPosition(event.getClientX(), event.getClientY()); |
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menu.show(); |
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} |
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} |
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}; |
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private ListDataProvider<Folder> rootDataProvider = new ListDataProvider<Folder>(); |
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private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>(); |
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private SingleSelectionModel<Folder> selectionModel; |
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public FolderTreeViewModel(SingleSelectionModel<Folder> selectionModel) { |
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this.selectionModel = selectionModel;
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} |
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@Override
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public <T> NodeInfo<?> getNodeInfo(T value) {
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if (value == null) { |
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Folder f = new Folder("Loading ..."); |
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rootDataProvider.getList().add(f); |
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return new DefaultNodeInfo<Folder>(rootDataProvider, folderCell, selectionModel, null); |
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} |
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else {
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final Folder f = (Folder) value;
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if (dataProviderMap.get(f) == null) { |
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dataProviderMap.put(f, new ListDataProvider<Folder>());
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} |
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final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
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fetchFolder(f, dataProvider); |
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return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null); |
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} |
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} |
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@Override
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public boolean isLeaf(Object o) { |
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if (o instanceof Folder) { |
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Folder f = (Folder) o; |
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return f.getSubfolders().isEmpty();
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} |
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return false; |
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} |
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private void fetchFolder(final Iterator<Folder> iter, final ListDataProvider<Folder> dataProvider, final Set<Folder> folders) { |
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if (iter.hasNext()) {
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final Folder f = iter.next();
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GSS app = GSS.get(); |
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String path = app.getApiPath() + app.getUsername() + "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + f.getPrefix(); |
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GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, path, f) {
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@Override
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public void onSuccess(Folder result) { |
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fetchFolder(iter, dataProvider, folders); |
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} |
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@Override
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public void onError(Throwable t) { |
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GWT.log("Error getting folder", t);
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if (t instanceof RestException) |
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GSS.get().displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
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else
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GSS.get().displayError("System error fetching folder: " + t.getMessage());
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} |
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}; |
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getFolder.setHeader("X-Auth-Token", app.getToken());
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Scheduler.get().scheduleDeferred(getFolder); |
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} |
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else {
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dataProvider.getList().clear(); |
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dataProvider.getList().addAll(folders); |
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if (dataProvider.equals(rootDataProvider))
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selectionModel.setSelected(dataProvider.getList().get(0), true); |
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} |
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} |
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public void initialize(AccountResource account) { |
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Iterator<Folder> iter = account.getContainers().iterator();
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fetchFolder(iter, rootDataProvider, account.getContainers()); |
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} |
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public Folder getSelection() {
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return selectionModel.getSelectedObject();
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} |
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public void updateFolder(Folder folder) { |
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if (dataProviderMap.get(folder) == null) { |
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dataProviderMap.put(folder, new ListDataProvider<Folder>());
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} |
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final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
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fetchFolder(folder, dataProvider); |
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} |
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public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider) { |
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dataProvider.flush(); |
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Scheduler.get().scheduleDeferred(new ScheduledCommand() {
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@Override
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public void execute() { |
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final GSS app = GSS.get();
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String path = app.getApiPath() + app.getUsername() + "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + f.getPrefix(); |
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GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, path, f) {
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@Override
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public void onSuccess(Folder result) { |
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Iterator<Folder> iter = result.getSubfolders().iterator();
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fetchFolder(iter, dataProvider, result.getSubfolders()); |
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} |
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@Override
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public void onError(Throwable t) { |
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GWT.log("Error getting folder", t);
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if (t instanceof RestException) |
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GSS.get().displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
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else
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GSS.get().displayError("System error fetching folder: " + t.getMessage());
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} |
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}; |
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getFolder.setHeader("X-Auth-Token", app.getToken());
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Scheduler.get().scheduleDeferred(getFolder); |
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} |
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}); |
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} |
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} |