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 = 100;
  58
  59         public void createPartControl(Composite parent) {
  60                 Table table = createTable(parent);
  61                 viewer = new TableViewer(table);
  62                 viewer.setLabelProvider(createLabelProvider());
  63                 viewer.setContentProvider(new ViewContentProvider());
  64                 viewer.setInput(getViewSite());
  65                 viewer.addDoubleClickListener(new ViewDoubleClickListener());
  66
  67                 resultsObserver = new AsyncUiEventListener() {
  68                         protected void onEventInUiThread(EventIterator events) {
  69                                 // TODO optimize by updating only the changed result
  70                                 viewer.refresh();
  71                         }
  72                 };
  73                 try {
  74                         ObservationManager observationManager = session.getWorkspace()
  75                                         .getObservationManager();
  76                         observationManager.addEventListener(resultsObserver,
  77                                         Event.NODE_ADDED | Event.NODE_REMOVED
  78                                                         | Event.PROPERTY_CHANGED,
  79                                         SlcJcrConstants.RESULTS_BASE_PATH, true, null, null, 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 work 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         /*
 109          * METHODS TO BE OVERRIDDEN
 110          */
 111         protected IBaseLabelProvider createLabelProvider() {
 112                 return new ViewLabelProvider();
 113         }
 114
 115         protected void processDoubleClick(DoubleClickEvent evt) {
 116                 Object obj = ((IStructuredSelection) evt.getSelection())
 117                                 .getFirstElement();
 118                 try {
 119                         if (obj instanceof Node) {
 120                                 Node node = (Node) obj;
 121                                 if (node.isNodeType(SlcTypes.SLC_PROCESS)) {
 122                                         IWorkbenchPage activePage = PlatformUI.getWorkbench()
 123                                                         .getActiveWorkbenchWindow().getActivePage();
 124                                         activePage.openEditor(
 125                                                         new ProcessEditorInput(node.getPath()),
 126                                                         ProcessEditor.ID);
 127                                 }
 128                         }
 129                 } catch (Exception e) {
 130                         throw new SlcException("Cannot open " + obj, e);
 131                 }
 132         }
 133
 134         public void setFocus() {
 135                 viewer.getControl().setFocus();
 136         }
 137
 138         @Override
 139         public void dispose() {
 140                 JcrUtils.unregisterQuietly(session.getWorkspace(), resultsObserver);
 141                 super.dispose();
 142         }
 143
 144         class ViewContentProvider implements IStructuredContentProvider {
 145
 146                 public Object[] getElements(Object inputElement) {
 147                         try {
 148                                 // TODO filter, optimize with virtual table, ...
 149                                 String sql = "SELECT * from [slc:result] ORDER BY [jcr:lastModified] DESC";
 150                                 Query query = session.getWorkspace().getQueryManager()
 151                                                 .createQuery(sql, Query.JCR_SQL2);
 152                                 // TODO paging
 153                                 query.setLimit(queryLimit);
 154                                 List<Node> nodes = new ArrayList<Node>();
 155                                 for (NodeIterator nit = query.execute().getNodes(); nit
 156                                                 .hasNext();) {
 157                                         nodes.add(nit.nextNode());
 158                                 }
 159                                 return nodes.toArray();
 160                         } catch (RepositoryException e) {
 161                                 throw new SlcException("Cannot retrieve processes", e);
 162                         }
 163                 }
 164
 165                 public void dispose() {
 166                 }
 167
 168                 public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 169                 }
 170
 171         }
 172
 173         class ViewLabelProvider extends ColumnLabelProvider implements
 174                         ITableLabelProvider {
 175
 176                 public Image getColumnImage(Object obj, int columnIndex) {
 177                         if (columnIndex != 0)
 178                                 return null;
 179                         try {
 180                                 Node node = (Node) obj;
 181                                 if (node.hasProperty(SLC_COMPLETED)) {
 182                                         // TODO
 183                                 }
 184                                 return null;
 185                         } catch (RepositoryException e) {
 186                                 throw new SlcException("Cannot get column text", e);
 187                         }
 188                 }
 189
 190                 public String getColumnText(Object obj, int index) {
 191                         try {
 192                                 Node node = (Node) obj;
 193                                 switch (index) {
 194
 195                                 case 0:
 196                                         return dateFormat.format(node
 197                                                         .getProperty(Property.JCR_LAST_MODIFIED).getDate()
 198                                                         .getTime());
 199                                 case 1:
 200                                         return node.getProperty(SlcNames.SLC_UUID).getString();
 201                                 }
 202                                 return getText(obj);
 203                         } catch (RepositoryException e) {
 204                                 throw new SlcException("Cannot get column text", e);
 205                         }
 206                 }
 207
 208         }
 209
 210         class ViewDoubleClickListener implements IDoubleClickListener {
 211                 public void doubleClick(DoubleClickEvent evt) {
 212                         processDoubleClick(evt);
 213                 }
 214
 215         }
 216
 217         public void setSession(Session session) {
 218                 this.session = session;
 219         }
 220
 221 }