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.IBaseLabelProvider;
  30 import org.eclipse.jface.viewers.IDoubleClickListener;
  31 import org.eclipse.jface.viewers.IStructuredContentProvider;
  32 import org.eclipse.jface.viewers.IStructuredSelection;
  33 import org.eclipse.jface.viewers.ITableLabelProvider;
  34 import org.eclipse.jface.viewers.TableViewer;
  35 import org.eclipse.jface.viewers.Viewer;
  36 import org.eclipse.swt.SWT;
  37 import org.eclipse.swt.graphics.Image;
  38 import org.eclipse.swt.widgets.Composite;
  39 import org.eclipse.swt.widgets.Table;
  40 import org.eclipse.swt.widgets.TableColumn;
  41 import org.eclipse.ui.IWorkbenchPage;
  42 import org.eclipse.ui.PlatformUI;
  43 import org.eclipse.ui.part.ViewPart;
  44
  45 /** Displays results. */
  46 public class JcrResultListView extends ViewPart implements SlcNames {
  47         public static final String ID = "org.argeo.slc.client.ui.jcrResultListView";
  48
  49         private TableViewer viewer;
  50
  51         private Session session;
  52
  53         private EventListener resultsObserver;
  54
  55         private DateFormat dateFormat = new SimpleDateFormat(
  56                         "EEE, dd MMM yyyy HH:mm:ss");
  57         private Integer queryLimit = 2000;
  58
  59         public void createPartControl(Composite parent) {
  60
  61                 Table table = createTable(parent);
  62                 viewer = new TableViewer(table);
  63                 viewer.setLabelProvider(createLabelProvider());
  64                 viewer.setContentProvider(new ViewContentProvider());
  65                 viewer.setInput(getViewSite());
  66                 viewer.addDoubleClickListener(new ViewDoubleClickListener());
  67
  68                 getViewSite().setSelectionProvider(viewer);
  69
  70                 resultsObserver = new AsyncUiEventListener() {
  71                         protected void onEventInUiThread(EventIterator events) {
  72                                 // TODO optimize by updating only the changed result
  73                                 viewer.refresh();
  74                         }
  75                 };
  76                 try {
  77                         ObservationManager observationManager = session.getWorkspace()
  78                                         .getObservationManager();
  79                         observationManager.addEventListener(resultsObserver,
  80                                         Event.NODE_ADDED | Event.NODE_REMOVED
  81                                                         | Event.PROPERTY_CHANGED,
  82                                         SlcJcrConstants.RESULTS_BASE_PATH, true, null, null, false);
  83                 } catch (RepositoryException e) {
  84                         throw new SlcException("Cannot register listeners", e);
  85                 }
  86
  87         }
  88
  89         protected Table createTable(Composite parent) {
  90                 int style = SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL
  91                                 | SWT.FULL_SELECTION | SWT.MULTI;
  92                 // does not work with RAP, commented for the time being
  93                 // | SWT.HIDE_SELECTION;
  94
  95                 Table table = new Table(parent, style);
  96
  97                 table.setLinesVisible(true);
  98                 table.setHeaderVisible(true);
  99
 100                 TableColumn column = new TableColumn(table, SWT.LEFT, 0);
 101                 column.setText("Date");
 102                 column.setWidth(200);
 103
 104                 column = new TableColumn(table, SWT.LEFT, 1);
 105                 column.setText("Id");
 106                 column.setWidth(300);
 107
 108                 return table;
 109         }
 110
 111         // public void refresh() {
 112         // viewer.refresh();
 113         // }
 114
 115         /*
 116          * METHODS TO BE OVERRIDDEN
 117          */
 118         protected IBaseLabelProvider createLabelProvider() {
 119                 return new ViewLabelProvider();
 120         }
 121
 122         protected void processDoubleClick(DoubleClickEvent evt) {
 123                 Object obj = ((IStructuredSelection) evt.getSelection())
 124                                 .getFirstElement();
 125                 try {
 126                         if (obj instanceof Node) {
 127                                 Node node = (Node) obj;
 128                                 if (node.isNodeType(SlcTypes.SLC_PROCESS)) {
 129                                         IWorkbenchPage activePage = PlatformUI.getWorkbench()
 130                                                         .getActiveWorkbenchWindow().getActivePage();
 131                                         activePage.openEditor(
 132                                                         new ProcessEditorInput(node.getPath()),
 133                                                         ProcessEditor.ID);
 134                                 }
 135                         }
 136                 } catch (Exception e) {
 137                         throw new SlcException("Cannot open " + obj, e);
 138                 }
 139         }
 140
 141         public void setFocus() {
 142                 viewer.getControl().setFocus();
 143         }
 144
 145         @Override
 146         public void dispose() {
 147                 JcrUtils.unregisterQuietly(session.getWorkspace(), resultsObserver);
 148                 super.dispose();
 149         }
 150
 151         class ViewContentProvider implements IStructuredContentProvider {
 152
 153                 public Object[] getElements(Object inputElement) {
 154                         try {
 155                                 // TODO filter, optimize with virtual table, ...
 156                                 String sql = "SELECT * from [slc:result] ORDER BY [jcr:lastModified] DESC";
 157                                 Query query = session.getWorkspace().getQueryManager()
 158                                                 .createQuery(sql, Query.JCR_SQL2);
 159                                 // TODO paging
 160                                 query.setLimit(queryLimit);
 161                                 List<Node> nodes = new ArrayList<Node>();
 162                                 for (NodeIterator nit = query.execute().getNodes(); nit
 163                                                 .hasNext();) {
 164                                         nodes.add(nit.nextNode());
 165                                 }
 166                                 return nodes.toArray();
 167                         } catch (RepositoryException e) {
 168                                 throw new SlcException("Cannot retrieve processes", e);
 169                         }
 170                 }
 171
 172                 public void dispose() {
 173                 }
 174
 175                 public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 176                 }
 177
 178         }
 179
 180         class ViewLabelProvider extends ColumnLabelProvider implements
 181                         ITableLabelProvider {
 182
 183                 public Image getColumnImage(Object obj, int columnIndex) {
 184                         if (columnIndex != 0)
 185                                 return null;
 186                         try {
 187                                 Node node = (Node) obj;
 188                                 if (node.hasProperty(SLC_COMPLETED)) {
 189                                         // TODO
 190                                 }
 191                                 return null;
 192                         } catch (RepositoryException e) {
 193                                 throw new SlcException("Cannot get column text", e);
 194                         }
 195                 }
 196
 197                 public String getColumnText(Object obj, int index) {
 198                         try {
 199                                 Node node = (Node) obj;
 200                                 switch (index) {
 201
 202                                 case 0:
 203                                         return dateFormat.format(node
 204                                                         .getProperty(Property.JCR_LAST_MODIFIED).getDate()
 205                                                         .getTime());
 206                                 case 1:
 207                                         return node.getProperty(SlcNames.SLC_UUID).getString();
 208                                 }
 209                                 return getText(obj);
 210                         } catch (RepositoryException e) {
 211                                 throw new SlcException("Cannot get column text", e);
 212                         }
 213                 }
 214
 215         }
 216
 217         class ViewDoubleClickListener implements IDoubleClickListener {
 218                 public void doubleClick(DoubleClickEvent evt) {
 219                         processDoubleClick(evt);
 220                 }
 221
 222         }
 223
 224         public void setSession(Session session) {
 225                 this.session = session;
 226         }
 227
 228 }