eclipse/plugins/org.argeo.slc.client.ui/src/main/java/org/argeo/slc/client/ui/views/JcrResultListView.java

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.slc.client.ui.views;
  17
  18 import java.text.DateFormat;
  19 import java.text.SimpleDateFormat;
  20 import java.util.ArrayList;
  21 import java.util.List;
  22
  23 import javax.jcr.Node;
  24 import javax.jcr.NodeIterator;
  25 import javax.jcr.RepositoryException;
  26 import javax.jcr.Session;
  27 import javax.jcr.observation.Event;
  28 import javax.jcr.observation.EventListener;
  29 import javax.jcr.observation.ObservationManager;
  30 import javax.jcr.query.Query;
  31
  32 import org.argeo.eclipse.ui.jcr.AsyncUiEventListener;
  33 import org.argeo.eclipse.ui.jcr.NodeElementComparer;
  34 import org.argeo.jcr.JcrUtils;
  35 import org.argeo.slc.SlcException;
  36 import org.argeo.slc.client.ui.editors.ProcessEditor;
  37 import org.argeo.slc.client.ui.editors.ProcessEditorInput;
  38 import org.argeo.slc.jcr.SlcJcrConstants;
  39 import org.argeo.slc.jcr.SlcNames;
  40 import org.argeo.slc.jcr.SlcTypes;
  41 import org.eclipse.jface.viewers.ColumnLabelProvider;
  42 import org.eclipse.jface.viewers.DoubleClickEvent;
  43 import org.eclipse.jface.viewers.IBaseLabelProvider;
  44 import org.eclipse.jface.viewers.IDoubleClickListener;
  45 import org.eclipse.jface.viewers.IStructuredContentProvider;
  46 import org.eclipse.jface.viewers.IStructuredSelection;
  47 import org.eclipse.jface.viewers.ITableLabelProvider;
  48 import org.eclipse.jface.viewers.TableViewer;
  49 import org.eclipse.jface.viewers.Viewer;
  50 import org.eclipse.swt.SWT;
  51 import org.eclipse.swt.graphics.Image;
  52 import org.eclipse.swt.widgets.Composite;
  53 import org.eclipse.swt.widgets.Display;
  54 import org.eclipse.swt.widgets.Table;
  55 import org.eclipse.swt.widgets.TableColumn;
  56 import org.eclipse.ui.IWorkbenchPage;
  57 import org.eclipse.ui.PlatformUI;
  58 import org.eclipse.ui.part.ViewPart;
  59
  60 /** Displays results. */
  61 public class JcrResultListView extends ViewPart implements SlcNames {
  62         public static final String ID = "org.argeo.slc.client.ui.jcrResultListView";
  63
  64         private TableViewer viewer;
  65
  66         private Session session;
  67
  68         private EventListener resultsObserver;
  69
  70         private DateFormat dateFormat = new SimpleDateFormat(
  71                         "EEE, dd MMM yyyy HH:mm:ss");
  72         private Integer queryLimit = 2000;
  73
  74         public void createPartControl(Composite parent) {
  75
  76                 Table table = createTable(parent);
  77                 viewer = new TableViewer(table);
  78                 viewer.setLabelProvider(createLabelProvider());
  79                 viewer.setContentProvider(new ViewContentProvider());
  80                 viewer.setInput(getViewSite());
  81                 viewer.addDoubleClickListener(new ViewDoubleClickListener());
  82                 viewer.setComparer(new NodeElementComparer());
  83
  84                 getViewSite().setSelectionProvider(viewer);
  85
  86                 resultsObserver = new ResultObserver(viewer.getTable().getDisplay());
  87                 try {
  88                         ObservationManager observationManager = session.getWorkspace()
  89                                         .getObservationManager();
  90                         String[] nodeTypes = { SlcTypes.SLC_RESULT };
  91                         // FIXME Will not be notified if empty result is deleted
  92                         observationManager.addEventListener(resultsObserver,
  93                                         Event.PROPERTY_ADDED | Event.NODE_REMOVED,
  94                                         SlcJcrConstants.RESULTS_BASE_PATH, true, null, nodeTypes,
  95                                         false);
  96                 } catch (RepositoryException e) {
  97                         throw new SlcException("Cannot register listeners", e);
  98                 }
  99
 100         }
 101
 102         protected Table createTable(Composite parent) {
 103                 int style = SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL
 104                                 | SWT.FULL_SELECTION | SWT.MULTI;
 105                 // does not work with RAP, commented for the time being
 106                 // | SWT.HIDE_SELECTION;
 107
 108                 Table table = new Table(parent, style);
 109
 110                 table.setLinesVisible(true);
 111                 table.setHeaderVisible(true);
 112
 113                 TableColumn column = new TableColumn(table, SWT.LEFT, 0);
 114                 column.setText("Date");
 115                 column.setWidth(200);
 116
 117                 column = new TableColumn(table, SWT.LEFT, 1);
 118                 column.setText("Id");
 119                 column.setWidth(300);
 120
 121                 return table;
 122         }
 123
 124         // public void refresh() {
 125         // viewer.refresh();
 126         // }
 127
 128         /*
 129          * METHODS TO BE OVERRIDDEN
 130          */
 131         protected IBaseLabelProvider createLabelProvider() {
 132                 return new ViewLabelProvider();
 133         }
 134
 135         protected void processDoubleClick(DoubleClickEvent evt) {
 136                 Object obj = ((IStructuredSelection) evt.getSelection())
 137                                 .getFirstElement();
 138                 try {
 139                         if (obj instanceof Node) {
 140                                 Node node = (Node) obj;
 141                                 // FIXME: open a default result editor
 142                                 if (node.isNodeType(SlcTypes.SLC_PROCESS)) {
 143                                         IWorkbenchPage activePage = PlatformUI.getWorkbench()
 144                                                         .getActiveWorkbenchWindow().getActivePage();
 145                                         activePage.openEditor(
 146                                                         new ProcessEditorInput(node.getPath()),
 147                                                         ProcessEditor.ID);
 148                                 }
 149                         }
 150                 } catch (Exception e) {
 151                         throw new SlcException("Cannot open " + obj, e);
 152                 }
 153         }
 154
 155         public void setFocus() {
 156                 viewer.getControl().setFocus();
 157         }
 158
 159         @Override
 160         public void dispose() {
 161                 JcrUtils.unregisterQuietly(session.getWorkspace(), resultsObserver);
 162                 super.dispose();
 163         }
 164
 165         class ViewContentProvider implements IStructuredContentProvider {
 166
 167                 public Object[] getElements(Object inputElement) {
 168                         try {
 169                                 // TODO filter, optimize with virtual table, ...
 170                                 String sql = "SELECT * from [slc:result] ORDER BY [jcr:lastModified] DESC";
 171                                 Query query = session.getWorkspace().getQueryManager()
 172                                                 .createQuery(sql, Query.JCR_SQL2);
 173                                 // TODO paging
 174                                 query.setLimit(queryLimit);
 175                                 List<Node> nodes = new ArrayList<Node>();
 176                                 for (NodeIterator nit = query.execute().getNodes(); nit
 177                                                 .hasNext();) {
 178                                         nodes.add(nit.nextNode());
 179                                 }
 180                                 return nodes.toArray();
 181                         } catch (RepositoryException e) {
 182                                 throw new SlcException("Cannot retrieve processes", e);
 183                         }
 184                 }
 185
 186                 public void dispose() {
 187                 }
 188
 189                 public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 190                 }
 191
 192         }
 193
 194         class ViewLabelProvider extends ColumnLabelProvider implements
 195                         ITableLabelProvider {
 196
 197                 public Image getColumnImage(Object obj, int columnIndex) {
 198                         if (columnIndex != 0)
 199                                 return null;
 200                         try {
 201                                 Node node = (Node) obj;
 202                                 if (node.hasProperty(SLC_COMPLETED)) {
 203                                         // TODO
 204                                 }
 205                                 return null;
 206                         } catch (RepositoryException e) {
 207                                 throw new SlcException("Cannot get column text", e);
 208                         }
 209                 }
 210
 211                 public String getColumnText(Object obj, int index) {
 212                         try {
 213                                 Node node = (Node) obj;
 214                                 switch (index) {
 215
 216                                 case 0:
 217                                         if (node.hasProperty(SLC_COMPLETED)) {
 218                                                 return dateFormat
 219                                                                 .format(node.getProperty(SLC_COMPLETED)
 220                                                                                 .getDate().getTime());
 221                                         } else {
 222                                                 return "OPEN";
 223                                         }
 224                                 case 1:
 225                                         return node.getProperty(SlcNames.SLC_UUID).getString();
 226                                 }
 227                                 return getText(obj);
 228                         } catch (RepositoryException e) {
 229                                 throw new SlcException("Cannot get column text", e);
 230                         }
 231                 }
 232
 233         }
 234
 235         class ViewDoubleClickListener implements IDoubleClickListener {
 236                 public void doubleClick(DoubleClickEvent evt) {
 237                         processDoubleClick(evt);
 238                 }
 239
 240         }
 241
 242         class ResultObserver extends AsyncUiEventListener {
 243
 244                 public ResultObserver(Display display) {
 245                         super(display);
 246                 }
 247
 248                 @Override
 249                 protected Boolean willProcessInUiThread(List<Event> events)
 250                                 throws RepositoryException {
 251                         for (Event event : events) {
 252                                 // getLog().debug("Received event " + event);
 253                                 int eventType = event.getType();
 254                                 if (eventType == Event.NODE_REMOVED)
 255                                         return true;
 256                                 String path = event.getPath();
 257                                 int index = path.lastIndexOf('/');
 258                                 String propertyName = path.substring(index + 1);
 259                                 if (propertyName.equals(SLC_COMPLETED)
 260                                                 || propertyName.equals(SLC_UUID)) {
 261                                         return true;
 262                                 }
 263                         }
 264                         return false;
 265                 }
 266
 267                 protected void onEventInUiThread(List<Event> events)
 268                                 throws RepositoryException {
 269                         if (getLog().isTraceEnabled())
 270                                 getLog().trace("Refresh result list");
 271                         viewer.refresh();
 272                 }
 273
 274         }
 275
 276         public void setSession(Session session) {
 277                 this.session = session;
 278         }
 279
 280 }