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

   1 package org.argeo.slc.client.ui.views;
   2
   3 import java.text.DateFormat;
   4 import java.text.SimpleDateFormat;
   5 import java.util.ArrayList;
   6 import java.util.List;
   7
   8 import javax.jcr.Node;
   9 import javax.jcr.NodeIterator;
  10 import javax.jcr.Property;
  11 import javax.jcr.RepositoryException;
  12 import javax.jcr.Session;
  13 import javax.jcr.observation.Event;
  14 import javax.jcr.observation.EventIterator;
  15 import javax.jcr.observation.EventListener;
  16 import javax.jcr.observation.ObservationManager;
  17 import javax.jcr.query.Query;
  18
  19 import org.argeo.eclipse.ui.jcr.AsyncUiEventListener;
  20 import org.argeo.jcr.JcrUtils;
  21 import org.argeo.slc.SlcException;
  22 import org.argeo.slc.client.ui.editors.ProcessEditor;
  23 import org.argeo.slc.client.ui.editors.ProcessEditorInput;
  24 import org.argeo.slc.jcr.SlcJcrConstants;
  25 import org.argeo.slc.jcr.SlcNames;
  26 import org.argeo.slc.jcr.SlcTypes;
  27 import org.eclipse.jface.viewers.ColumnLabelProvider;
  28 import org.eclipse.jface.viewers.DoubleClickEvent;
  29 import org.eclipse.jface.viewers.IDoubleClickListener;
  30 import org.eclipse.jface.viewers.IStructuredContentProvider;
  31 import org.eclipse.jface.viewers.IStructuredSelection;
  32 import org.eclipse.jface.viewers.ITableLabelProvider;
  33 import org.eclipse.jface.viewers.TableViewer;
  34 import org.eclipse.jface.viewers.Viewer;
  35 import org.eclipse.swt.SWT;
  36 import org.eclipse.swt.graphics.Image;
  37 import org.eclipse.swt.widgets.Composite;
  38 import org.eclipse.swt.widgets.Table;
  39 import org.eclipse.swt.widgets.TableColumn;
  40 import org.eclipse.ui.IWorkbenchPage;
  41 import org.eclipse.ui.PlatformUI;
  42 import org.eclipse.ui.part.ViewPart;
  43
  44 /** Displays results. */
  45 public class JcrResultListView extends ViewPart implements SlcNames {
  46         public static final String ID = "org.argeo.slc.client.ui.jcrResultListView";
  47
  48         private TableViewer viewer;
  49
  50         private Session session;
  51
  52         private EventListener resultsObserver;
  53
  54         private DateFormat dateFormat = new SimpleDateFormat(
  55                         "EEE, dd MMM yyyy HH:mm:ss");
  56         private Integer queryLimit = 100;
  57
  58         public void createPartControl(Composite parent) {
  59                 Table table = createTable(parent);
  60                 viewer = new TableViewer(table);
  61                 viewer.setLabelProvider(new LabelProvider());
  62                 viewer.setContentProvider(new ContentProvider());
  63                 viewer.setInput(getViewSite());
  64                 viewer.addDoubleClickListener(new ViewDoubleClickListener());
  65
  66                 resultsObserver = new AsyncUiEventListener() {
  67                         protected void onEventInUiThread(EventIterator events) {
  68                                 // TODO optimize by updating only the changed result
  69                                 viewer.refresh();
  70                         }
  71                 };
  72                 try {
  73                         ObservationManager observationManager = session.getWorkspace()
  74                                         .getObservationManager();
  75                         observationManager.addEventListener(resultsObserver,
  76                                         Event.NODE_ADDED | Event.NODE_REMOVED
  77                                                         | Event.PROPERTY_CHANGED,
  78                                         SlcJcrConstants.RESULTS_BASE_PATH, true, null, null,
  79                                         false);
  80                 } catch (RepositoryException e) {
  81                         throw new SlcException("Cannot register listeners", e);
  82                 }
  83
  84         }
  85
  86         protected Table createTable(Composite parent) {
  87                 int style = SWT.SINGLE | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL
  88                                 | SWT.FULL_SELECTION;
  89                 // does not function with RAP, commented for the time being
  90                 // | SWT.HIDE_SELECTION;
  91
  92                 Table table = new Table(parent, style);
  93
  94                 table.setLinesVisible(true);
  95                 table.setHeaderVisible(true);
  96
  97                 TableColumn column = new TableColumn(table, SWT.LEFT, 0);
  98                 column.setText("Date");
  99                 column.setWidth(200);
 100
 101                 column = new TableColumn(table, SWT.LEFT, 1);
 102                 column.setText("Id");
 103                 column.setWidth(300);
 104
 105                 return table;
 106         }
 107
 108         public void setFocus() {
 109                 viewer.getControl().setFocus();
 110         }
 111
 112         @Override
 113         public void dispose() {
 114                 JcrUtils.unregisterQuietly(session.getWorkspace(), resultsObserver);
 115                 super.dispose();
 116         }
 117
 118         class ContentProvider implements IStructuredContentProvider {
 119
 120                 public Object[] getElements(Object inputElement) {
 121                         try {
 122                                 // TODO filter, optimize with virtual table, ...
 123                                 String sql = "SELECT * from [slc:result] ORDER BY [jcr:lastModified] DESC";
 124                                 Query query = session.getWorkspace().getQueryManager()
 125                                                 .createQuery(sql, Query.JCR_SQL2);
 126                                 // TODO paging
 127                                 query.setLimit(queryLimit);
 128                                 List<Node> nodes = new ArrayList<Node>();
 129                                 for (NodeIterator nit = query.execute().getNodes(); nit
 130                                                 .hasNext();) {
 131                                         nodes.add(nit.nextNode());
 132                                 }
 133                                 return nodes.toArray();
 134                         } catch (RepositoryException e) {
 135                                 throw new SlcException("Cannot retrieve processes", e);
 136                         }
 137                 }
 138
 139                 public void dispose() {
 140                 }
 141
 142                 public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 143                 }
 144
 145         }
 146
 147         class LabelProvider extends ColumnLabelProvider implements
 148                         ITableLabelProvider {
 149
 150                 public Image getColumnImage(Object obj, int columnIndex) {
 151                         if (columnIndex != 0)
 152                                 return null;
 153                         try {
 154                                 Node node = (Node) obj;
 155                                 if(node.hasProperty(SLC_COMPLETED)){
 156                                         // TODO
 157                                 }
 158                                 return null;
 159                         } catch (RepositoryException e) {
 160                                 throw new SlcException("Cannot get column text", e);
 161                         }
 162                 }
 163
 164                 public String getColumnText(Object obj, int index) {
 165                         try {
 166                                 Node node = (Node) obj;
 167                                 switch (index) {
 168
 169                                 case 0:
 170                                         return dateFormat.format(node
 171                                                         .getProperty(Property.JCR_LAST_MODIFIED).getDate()
 172                                                         .getTime());
 173                                 case 1:
 174                                         return node.getProperty(SlcNames.SLC_UUID).getString();
 175                                 }
 176                                 return getText(obj);
 177                         } catch (RepositoryException e) {
 178                                 throw new SlcException("Cannot get column text", e);
 179                         }
 180                 }
 181
 182         }
 183
 184         class ViewDoubleClickListener implements IDoubleClickListener {
 185                 public void doubleClick(DoubleClickEvent evt) {
 186                         Object obj = ((IStructuredSelection) evt.getSelection())
 187                                         .getFirstElement();
 188                         try {
 189                                 if (obj instanceof Node) {
 190                                         Node node = (Node) obj;
 191                                         if (node.isNodeType(SlcTypes.SLC_PROCESS)) {
 192                                                 IWorkbenchPage activePage = PlatformUI.getWorkbench()
 193                                                                 .getActiveWorkbenchWindow().getActivePage();
 194                                                 activePage.openEditor(
 195                                                                 new ProcessEditorInput(node.getPath()),
 196                                                                 ProcessEditor.ID);
 197                                         }
 198                                 }
 199                         } catch (Exception e) {
 200                                 throw new SlcException("Cannot open " + obj, e);
 201                         }
 202                 }
 203
 204         }
 205
 206         public void setSession(Session session) {
 207                 this.session = session;
 208         }
 209
 210 }