eclipse/plugins/org.argeo.slc.client.ui/src/main/java/org/argeo/slc/client/ui/editors/ProcessBuilderPage.java

   1 package org.argeo.slc.client.ui.editors;
   2
   3 import java.util.ArrayList;
   4 import java.util.Iterator;
   5 import java.util.List;
   6 import java.util.UUID;
   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.nodetype.NodeType;
  14 import javax.jcr.observation.Event;
  15 import javax.jcr.observation.EventIterator;
  16 import javax.jcr.observation.EventListener;
  17 import javax.jcr.observation.ObservationManager;
  18 import javax.jcr.query.Query;
  19 import javax.jcr.query.QueryManager;
  20
  21 import org.apache.commons.logging.Log;
  22 import org.apache.commons.logging.LogFactory;
  23 import org.argeo.ArgeoException;
  24 import org.argeo.eclipse.ui.jcr.AsyncUiEventListener;
  25 import org.argeo.jcr.JcrUtils;
  26 import org.argeo.slc.SlcException;
  27 import org.argeo.slc.client.ui.SlcImages;
  28 import org.argeo.slc.core.execution.PrimitiveUtils;
  29 import org.argeo.slc.execution.ExecutionProcess;
  30 import org.argeo.slc.jcr.SlcJcrUtils;
  31 import org.argeo.slc.jcr.SlcNames;
  32 import org.argeo.slc.jcr.SlcTypes;
  33 import org.eclipse.jface.viewers.CellEditor;
  34 import org.eclipse.jface.viewers.ColumnLabelProvider;
  35 import org.eclipse.jface.viewers.ColumnViewer;
  36 import org.eclipse.jface.viewers.EditingSupport;
  37 import org.eclipse.jface.viewers.ISelectionChangedListener;
  38 import org.eclipse.jface.viewers.IStructuredContentProvider;
  39 import org.eclipse.jface.viewers.IStructuredSelection;
  40 import org.eclipse.jface.viewers.ITreeContentProvider;
  41 import org.eclipse.jface.viewers.SelectionChangedEvent;
  42 import org.eclipse.jface.viewers.StructuredSelection;
  43 import org.eclipse.jface.viewers.TableViewer;
  44 import org.eclipse.jface.viewers.TableViewerColumn;
  45 import org.eclipse.jface.viewers.TextCellEditor;
  46 import org.eclipse.jface.viewers.TreeViewer;
  47 import org.eclipse.jface.viewers.Viewer;
  48 import org.eclipse.jface.viewers.ViewerDropAdapter;
  49 import org.eclipse.swt.SWT;
  50 import org.eclipse.swt.custom.SashForm;
  51 import org.eclipse.swt.dnd.DND;
  52 import org.eclipse.swt.dnd.TextTransfer;
  53 import org.eclipse.swt.dnd.Transfer;
  54 import org.eclipse.swt.dnd.TransferData;
  55 import org.eclipse.swt.events.SelectionEvent;
  56 import org.eclipse.swt.events.SelectionListener;
  57 import org.eclipse.swt.graphics.Image;
  58 import org.eclipse.swt.layout.FillLayout;
  59 import org.eclipse.swt.layout.GridData;
  60 import org.eclipse.swt.layout.GridLayout;
  61 import org.eclipse.swt.layout.RowData;
  62 import org.eclipse.swt.layout.RowLayout;
  63 import org.eclipse.swt.widgets.Button;
  64 import org.eclipse.swt.widgets.Composite;
  65 import org.eclipse.swt.widgets.Label;
  66 import org.eclipse.swt.widgets.Table;
  67 import org.eclipse.ui.IWorkbenchPage;
  68 import org.eclipse.ui.PlatformUI;
  69 import org.eclipse.ui.forms.AbstractFormPart;
  70 import org.eclipse.ui.forms.IManagedForm;
  71 import org.eclipse.ui.forms.editor.FormPage;
  72 import org.eclipse.ui.forms.widgets.FormToolkit;
  73 import org.eclipse.ui.forms.widgets.ScrolledForm;
  74
  75 public class ProcessBuilderPage extends FormPage implements SlcNames {
  76         public final static String ID = "processBuilderPage";
  77         private final static Log log = LogFactory.getLog(ProcessBuilderPage.class);
  78
  79         private Node processNode;
  80
  81         private TreeViewer flowsViewer;
  82         private TableViewer valuesViewer;
  83         private Label statusLabel;
  84         private Button run;
  85         private Button remove;
  86         private Button clear;
  87
  88         private AbstractFormPart formPart;
  89         private EventListener statusObserver;
  90
  91         public ProcessBuilderPage(ProcessEditor editor, Node processNode) {
  92                 super(editor, ID, "Definition");
  93                 this.processNode = processNode;
  94         }
  95
  96         @Override
  97         protected void createFormContent(IManagedForm mf) {
  98                 try {
  99                         ScrolledForm form = mf.getForm();
 100                         form.setExpandHorizontal(true);
 101                         form.setExpandVertical(true);
 102                         form.setText("Process " + processNode.getName());
 103                         GridLayout mainLayout = new GridLayout(1, true);
 104                         form.getBody().setLayout(mainLayout);
 105
 106                         createControls(form.getBody());
 107                         createBuilder(form.getBody());
 108
 109                         // form
 110                         formPart = new AbstractFormPart() {
 111
 112                         };
 113                         getManagedForm().addPart(formPart);
 114
 115                         // observation
 116                         statusObserver = new AsyncUiEventListener() {
 117                                 protected void onEventInUiThread(EventIterator events) {
 118                                         statusChanged();
 119                                 }
 120                         };
 121                         ObservationManager observationManager = processNode.getSession()
 122                                         .getWorkspace().getObservationManager();
 123                         observationManager.addEventListener(statusObserver,
 124                                         Event.PROPERTY_CHANGED, processNode.getPath(), true, null,
 125                                         null, false);
 126
 127                         // add initial flows
 128                         addInitialFlows();
 129
 130                 } catch (RepositoryException e) {
 131                         throw new ArgeoException("Cannot create form content", e);
 132                 }
 133         }
 134
 135         protected void createControls(Composite parent) {
 136                 FormToolkit tk = getManagedForm().getToolkit();
 137
 138                 Composite controls = tk.createComposite(parent);
 139                 controls.setLayout(new RowLayout());
 140                 controls.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
 141
 142                 run = tk.createButton(controls, null, SWT.PUSH);
 143                 run.setToolTipText("Run");
 144                 run.setImage(SlcImages.LAUNCH);
 145                 run.addSelectionListener(new SelectionListener() {
 146                         public void widgetSelected(SelectionEvent e) {
 147                                 if (isFinished(getProcessStatus())) {
 148                                         relaunch();
 149                                 } else {
 150                                         ((ProcessEditor) getEditor()).process();
 151                                 }
 152                         }
 153
 154                         public void widgetDefaultSelected(SelectionEvent e) {
 155                                 widgetSelected(e);
 156                         }
 157                 });
 158
 159                 remove = tk.createButton(controls, null, SWT.PUSH);
 160                 remove.setImage(SlcImages.REMOVE_ONE);
 161                 remove.setToolTipText("Remove selected flows");
 162                 remove.addSelectionListener(new SelectionListener() {
 163                         public void widgetSelected(SelectionEvent e) {
 164                                 removeSelectedFlows();
 165                         }
 166
 167                         public void widgetDefaultSelected(SelectionEvent e) {
 168                                 widgetSelected(e);
 169                         }
 170                 });
 171
 172                 clear = tk.createButton(controls, null, SWT.PUSH);
 173                 clear.setImage(SlcImages.REMOVE_ALL);
 174                 clear.setToolTipText("Clear all flows");
 175                 clear.addSelectionListener(new SelectionListener() {
 176                         public void widgetSelected(SelectionEvent e) {
 177                                 removeAllFlows();
 178                         }
 179
 180                         public void widgetDefaultSelected(SelectionEvent e) {
 181                                 widgetSelected(e);
 182                         }
 183                 });
 184
 185                 Composite statusComposite = tk.createComposite(controls);
 186                 RowData rowData = new RowData();
 187                 rowData.width = 100;
 188                 rowData.height = 16;
 189                 statusComposite.setLayoutData(rowData);
 190                 statusComposite.setLayout(new FillLayout());
 191                 statusLabel = tk.createLabel(statusComposite, getProcessStatus());
 192
 193                 // make sure all controls are in line with status
 194                 statusChanged();
 195         }
 196
 197         protected void createBuilder(Composite parent) {
 198                 FormToolkit tk = getManagedForm().getToolkit();
 199                 SashForm sashForm = new SashForm(parent, SWT.HORIZONTAL);
 200                 sashForm.setSashWidth(4);
 201                 GridData sahFormGd = new GridData(SWT.FILL, SWT.FILL, true, true);
 202                 sahFormGd.widthHint = 400;
 203                 sashForm.setLayoutData(sahFormGd);
 204
 205                 Composite flowsComposite = tk.createComposite(sashForm);
 206                 flowsComposite.setLayout(new GridLayout(1, false));
 207
 208                 flowsViewer = new TreeViewer(flowsComposite);
 209                 flowsViewer.getTree().setLayoutData(
 210                                 new GridData(SWT.FILL, SWT.FILL, true, true));
 211                 flowsViewer.setLabelProvider(new FlowsLabelProvider());
 212                 flowsViewer.setContentProvider(new FlowsContentProvider());
 213                 flowsViewer.addSelectionChangedListener(new FlowsSelectionListener());
 214
 215                 int operations = DND.DROP_COPY | DND.DROP_MOVE;
 216                 Transfer[] tt = new Transfer[] { TextTransfer.getInstance() };
 217                 flowsViewer.addDropSupport(operations, tt, new FlowsDropListener(
 218                                 flowsViewer));
 219
 220                 flowsViewer.setInput(getEditorSite());
 221                 flowsViewer.setInput(processNode);
 222
 223                 Composite valuesComposite = tk.createComposite(sashForm);
 224                 valuesComposite.setLayout(new GridLayout(1, false));
 225
 226                 valuesViewer = new TableViewer(valuesComposite);
 227                 GridData valuedGd = new GridData(SWT.FILL, SWT.FILL, true, true);
 228                 // valuedGd.widthHint = 200;
 229                 valuesViewer.getTable().setLayoutData(valuedGd);
 230                 valuesViewer.setContentProvider(new ValuesContentProvider());
 231                 initializeValuesViewer(valuesViewer);
 232                 sashForm.setWeights(getWeights());
 233                 valuesViewer.setInput(getEditorSite());
 234         }
 235
 236         /** Creates the columns of the values viewer */
 237         protected void initializeValuesViewer(TableViewer viewer) {
 238                 String[] titles = { "Name", "Value" };
 239                 int[] bounds = { 200, 100 };
 240
 241                 for (int i = 0; i < titles.length; i++) {
 242                         TableViewerColumn column = new TableViewerColumn(viewer, SWT.NONE);
 243                         column.getColumn().setText(titles[i]);
 244                         column.getColumn().setWidth(bounds[i]);
 245                         column.getColumn().setResizable(true);
 246                         column.getColumn().setMoveable(true);
 247                         if (i == 0) {
 248                                 column.setLabelProvider(new ColumnLabelProvider() {
 249                                         public String getText(Object element) {
 250                                                 try {
 251                                                         Node specAttrNode = (Node) element;
 252                                                         return specAttrNode.getName();
 253                                                 } catch (RepositoryException e) {
 254                                                         throw new SlcException("Cannot get value", e);
 255                                                 }
 256                                         }
 257                                 });
 258                         } else if (i == 1) {
 259                                 column.setLabelProvider(new ColumnLabelProvider() {
 260                                         public String getText(Object element) {
 261                                                 Object obj = getAttributeSpecValue((Node) element);
 262                                                 return obj != null ? obj.toString() : "";
 263                                         }
 264                                 });
 265                                 column.setEditingSupport(new ValuesEditingSupport(viewer));
 266                         }
 267
 268                 }
 269                 Table table = viewer.getTable();
 270                 table.setHeaderVisible(false);
 271                 table.setLinesVisible(true);
 272         }
 273
 274         protected int[] getWeights() {
 275                 return new int[] { 50, 50 };
 276         }
 277
 278         /*
 279          * CONTROLLERS
 280          */
 281         /** Opens a new editor with a copy of this process */
 282         protected void relaunch() {
 283                 try {
 284                         Node duplicatedNode = duplicateProcess();
 285                         IWorkbenchPage activePage = PlatformUI.getWorkbench()
 286                                         .getActiveWorkbenchWindow().getActivePage();
 287                         activePage.openEditor(
 288                                         new ProcessEditorInput(duplicatedNode.getPath()),
 289                                         ProcessEditor.ID);
 290                         getEditor().close(false);
 291                 } catch (Exception e1) {
 292                         throw new SlcException("Cannot relaunch " + processNode, e1);
 293                 }
 294         }
 295
 296         /** Duplicates the process */
 297         protected Node duplicateProcess() {
 298                 try {
 299                         Session session = processNode.getSession();
 300                         String uuid = UUID.randomUUID().toString();
 301                         String destPath = SlcJcrUtils.createExecutionProcessPath(uuid);
 302                         Node newNode = JcrUtils.mkdirs(session, destPath,
 303                                         SlcTypes.SLC_PROCESS);
 304                         JcrUtils.copy(processNode, newNode);
 305                         // session.getWorkspace().copy(processNode.getPath(), destPath);
 306                         // Node newNode = session.getNode(destPath);
 307                         // make sure that we kept the mixins
 308                         // newNode.addMixin(NodeType.MIX_CREATED);
 309                         // newNode.addMixin(NodeType.MIX_LAST_MODIFIED);
 310                         newNode.setProperty(SLC_UUID, uuid);
 311                         newNode.setProperty(SLC_STATUS, ExecutionProcess.INITIALIZED);
 312                         session.save();
 313                         return newNode;
 314                 } catch (RepositoryException e) {
 315                         throw new SlcException("Cannot duplicate process", e);
 316                 }
 317         }
 318
 319         /** Reflects a status change */
 320         protected void statusChanged() {
 321                 String status = getProcessStatus();
 322                 statusLabel.setText(status);
 323                 Boolean isEditable = isEditable(status);
 324                 run.setEnabled(isEditable);
 325                 remove.setEnabled(isEditable);
 326                 clear.setEnabled(isEditable);
 327                 // flowsViewer.getTree().setEnabled(isEditable);
 328                 if (status.equals(ExecutionProcess.COMPLETED)
 329                                 || status.equals(ExecutionProcess.ERROR)) {
 330                         run.setEnabled(true);
 331                         run.setImage(SlcImages.RELAUNCH);
 332                         run.setToolTipText("Relaunch");
 333                 }
 334         }
 335
 336         /** Adds initial flows from the editor input if any */
 337         protected void addInitialFlows() {
 338                 for (String path : ((ProcessEditorInput) getEditorInput())
 339                                 .getInitialFlowPaths()) {
 340                         addFlow(path);
 341                 }
 342         }
 343
 344         /**
 345          * Adds a new flow.
 346          *
 347          * @param path
 348          *            the path of the flow
 349          */
 350         protected void addFlow(String path) {
 351                 try {
 352                         Node flowNode = processNode.getSession().getNode(path);
 353                         Node realizedFlowNode = processNode.getNode(SLC_FLOW).addNode(
 354                                         SLC_FLOW);
 355                         realizedFlowNode.addMixin(SlcTypes.SLC_REALIZED_FLOW);
 356                         Node address = realizedFlowNode.addNode(SLC_ADDRESS,
 357                                         NodeType.NT_ADDRESS);
 358                         address.setProperty(Property.JCR_PATH, path);
 359
 360                         // copy spec attributes
 361                         Node specAttrsBase;
 362                         if (flowNode.hasProperty(SLC_SPEC)) {
 363                                 Node executionSpecNode = flowNode.getProperty(SLC_SPEC)
 364                                                 .getNode();
 365                                 specAttrsBase = executionSpecNode;
 366                                 String executionSpecName = executionSpecNode.getProperty(
 367                                                 SLC_NAME).getString();
 368                                 realizedFlowNode.setProperty(SLC_SPEC, executionSpecName);
 369                         } else
 370                                 specAttrsBase = flowNode;
 371
 372                         specAttrs: for (NodeIterator nit = specAttrsBase.getNodes(); nit
 373                                         .hasNext();) {
 374                                 Node specAttrNode = nit.nextNode();
 375                                 if (!specAttrNode
 376                                                 .isNodeType(SlcTypes.SLC_EXECUTION_SPEC_ATTRIBUTE))
 377                                         continue specAttrs;
 378                                 Node realizedAttrNode = realizedFlowNode.addNode(specAttrNode
 379                                                 .getName());
 380                                 JcrUtils.copy(specAttrNode, realizedAttrNode);
 381
 382                                 // for (PropertyIterator pit = realizedAttrNode.getProperties();
 383                                 // pit
 384                                 // .hasNext();) {
 385                                 // Property p = pit.nextProperty();
 386                                 // if (!p.isMultiple())
 387                                 // log.debug(p.getName() + "=" + p.getValue().getString());
 388                                 // }
 389                         }
 390
 391                         flowsViewer.refresh();
 392                         formPart.markDirty();
 393                 } catch (RepositoryException e) {
 394                         throw new SlcException("Cannot drop " + path, e);
 395                 }
 396         }
 397
 398         @SuppressWarnings("unchecked")
 399         protected void removeSelectedFlows() {
 400                 if (!flowsViewer.getSelection().isEmpty()) {
 401                         Iterator<Object> it = ((StructuredSelection) flowsViewer
 402                                         .getSelection()).iterator();
 403                         while (it.hasNext()) {
 404                                 Node node = (Node) it.next();
 405                                 try {
 406                                         node.remove();
 407                                 } catch (RepositoryException e) {
 408                                         throw new ArgeoException("Cannot remove " + node, e);
 409                                 }
 410                         }
 411                         flowsViewer.refresh();
 412                         formPart.markDirty();
 413                 }
 414         }
 415
 416         protected void removeAllFlows() {
 417                 try {
 418                         for (NodeIterator nit = processNode.getNode(SLC_FLOW).getNodes(); nit
 419                                         .hasNext();) {
 420                                 nit.nextNode().remove();
 421                         }
 422                         flowsViewer.refresh();
 423                         formPart.markDirty();
 424                 } catch (RepositoryException e) {
 425                         throw new ArgeoException("Cannot remove flows from " + processNode,
 426                                         e);
 427                 }
 428         }
 429
 430         public void commit(Boolean onSave) {
 431                 if (onSave)
 432                         statusLabel.setText(getProcessStatus());
 433                 formPart.commit(onSave);
 434         }
 435
 436         /*
 437          * STATE
 438          */
 439         protected String getProcessStatus() {
 440                 try {
 441                         return processNode.getProperty(SLC_STATUS).getString();
 442                 } catch (RepositoryException e) {
 443                         throw new SlcException("Cannot retrieve status for " + processNode,
 444                                         e);
 445                 }
 446         }
 447
 448         /** Optimization so that we don't call the node each time */
 449         protected Boolean isEditable(String status) {
 450                 return status.equals(ExecutionProcess.NEW)
 451                                 || status.equals(ExecutionProcess.INITIALIZED);
 452         }
 453
 454         protected Boolean isFinished(String status) {
 455                 return status.equals(ExecutionProcess.COMPLETED)
 456                                 || status.equals(ExecutionProcess.ERROR);
 457         }
 458
 459         /*
 460          * LIFECYCLE
 461          */
 462         @Override
 463         public void dispose() {
 464                 JcrUtils.unregisterQuietly(processNode, statusObserver);
 465                 super.dispose();
 466         }
 467
 468         /*
 469          * UTILITIES
 470          */
 471         protected static Object getAttributeSpecValue(Node specAttrNode) {
 472                 try {
 473                         if (specAttrNode.isNodeType(SlcTypes.SLC_PRIMITIVE_SPEC_ATTRIBUTE)) {
 474                                 if (!specAttrNode.hasProperty(SLC_VALUE))
 475                                         return null;
 476                                 String type = specAttrNode.getProperty(SLC_TYPE).getString();
 477                                 // TODO optimize based on data type?
 478                                 Object value = PrimitiveUtils.convert(type, specAttrNode
 479                                                 .getProperty(SLC_VALUE).getString());
 480                                 // log.debug(specAttrNode + ", type=" + type + ", value=" +
 481                                 // value);
 482                                 return value;
 483                         }
 484                         return null;
 485                 } catch (RepositoryException e) {
 486                         throw new SlcException("Cannot get value", e);
 487                 }
 488
 489         }
 490
 491         /*
 492          * FLOWS SUBCLASSES
 493          */
 494         static class FlowsContentProvider implements ITreeContentProvider {
 495                 public Object[] getElements(Object obj) {
 496                         if (!(obj instanceof Node))
 497                                 return new Object[0];
 498
 499                         try {
 500                                 Node node = (Node) obj;
 501                                 List<Node> children = new ArrayList<Node>();
 502                                 for (NodeIterator nit = node.getNode(SLC_FLOW).getNodes(); nit
 503                                                 .hasNext();)
 504                                         children.add(nit.nextNode());
 505                                 return children.toArray();
 506                         } catch (RepositoryException e) {
 507                                 throw new SlcException("Cannot list children of " + obj, e);
 508                         }
 509                 }
 510
 511                 public void inputChanged(Viewer arg0, Object arg1, Object arg2) {
 512                 }
 513
 514                 public void dispose() {
 515                 }
 516
 517                 public Object[] getChildren(Object parentElement) {
 518                         // no children for the time being
 519                         return null;
 520                 }
 521
 522                 public Object getParent(Object element) {
 523                         return null;
 524                 }
 525
 526                 public boolean hasChildren(Object element) {
 527                         return false;
 528                 }
 529
 530         }
 531
 532         static class FlowsLabelProvider extends ColumnLabelProvider {
 533
 534                 @Override
 535                 public String getText(Object element) {
 536                         Node node = (Node) element;
 537                         try {
 538                                 if (node.isNodeType(SlcTypes.SLC_REALIZED_FLOW)) {
 539                                         if (node.hasNode(SLC_ADDRESS)) {
 540                                                 String path = node.getNode(SLC_ADDRESS)
 541                                                                 .getProperty(Property.JCR_PATH).getString();
 542                                                 return SlcJcrUtils.flowExecutionModuleName(path) + ":"
 543                                                                 + SlcJcrUtils.flowRelativePath(path);
 544                                         }
 545                                 }
 546                         } catch (RepositoryException e) {
 547                                 throw new SlcException("Cannot display " + element, e);
 548                         }
 549                         return super.getText(element);
 550                 }
 551
 552                 @Override
 553                 public Image getImage(Object element) {
 554                         Node node = (Node) element;
 555                         try {
 556                                 if (node.isNodeType(SlcTypes.SLC_REALIZED_FLOW)) {
 557                                         return SlcImages.FLOW;
 558                                 }
 559                         } catch (RepositoryException e) {
 560                                 throw new SlcException("Cannot display " + element, e);
 561                         }
 562                         return super.getImage(element);
 563                 }
 564
 565         }
 566
 567         /** Parameter view is updated each time a new line is selected */
 568         class FlowsSelectionListener implements ISelectionChangedListener {
 569                 public void selectionChanged(SelectionChangedEvent evt) {
 570                         if (evt.getSelection().isEmpty()) {
 571                                 valuesViewer.setInput(getEditorSite());
 572                                 return;
 573                         }
 574                         Node realizedFlowNode = (Node) ((IStructuredSelection) evt
 575                                         .getSelection()).getFirstElement();
 576                         valuesViewer.setInput(realizedFlowNode);
 577                 }
 578         }
 579
 580         /** Manages drop event. */
 581         class FlowsDropListener extends ViewerDropAdapter {
 582
 583                 public FlowsDropListener(Viewer viewer) {
 584                         super(viewer);
 585                 }
 586
 587                 @Override
 588                 public boolean performDrop(Object data) {
 589                         String path = data.toString();
 590                         try {
 591                                 // either a node or a whole directory was dragged
 592                                 QueryManager qm = processNode.getSession().getWorkspace()
 593                                                 .getQueryManager();
 594                                 String statement = "SELECT * FROM ["
 595                                                 + SlcTypes.SLC_EXECUTION_FLOW
 596                                                 + "] WHERE ISDESCENDANTNODE(['" + path
 597                                                 + "']) OR ISSAMENODE(['" + path + "'])";
 598                                 //log.debug(statement);
 599                                 Query query = qm.createQuery(statement, Query.JCR_SQL2);
 600                                 for (NodeIterator nit = query.execute().getNodes(); nit
 601                                                 .hasNext();) {
 602                                         addFlow(nit.nextNode().getPath());
 603                                 }
 604                                 return true;
 605                         } catch (RepositoryException e) {
 606                                 throw new SlcException("Cannot query flows under " + path, e);
 607                         }
 608                 }
 609
 610                 @Override
 611                 public boolean validateDrop(Object target, int operation,
 612                                 TransferData transferType) {
 613                         return isEditable(getProcessStatus());
 614                 }
 615         }
 616
 617         /*
 618          * VALUES SUBCLASSES
 619          */
 620         static class ValuesContentProvider implements IStructuredContentProvider {
 621
 622                 public Object[] getElements(Object inputElement) {
 623                         if (!(inputElement instanceof Node))
 624                                 return new Object[0];
 625
 626                         try {
 627                                 Node realizedFlowNode = (Node) inputElement;
 628                                 List<Node> specAttributes = new ArrayList<Node>();
 629                                 specAttrs: for (NodeIterator nit = realizedFlowNode.getNodes(); nit
 630                                                 .hasNext();) {
 631                                         Node specAttrNode = nit.nextNode();
 632                                         if (!specAttrNode
 633                                                         .isNodeType(SlcTypes.SLC_EXECUTION_SPEC_ATTRIBUTE))
 634                                                 continue specAttrs;
 635                                         specAttributes.add(specAttrNode);
 636                                 }
 637                                 return specAttributes.toArray();
 638                         } catch (RepositoryException e) {
 639                                 throw new SlcException("Cannot get elements", e);
 640                         }
 641                 }
 642
 643                 public void dispose() {
 644                 }
 645
 646                 public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 647                 }
 648         }
 649
 650         class ValuesEditingSupport extends EditingSupport {
 651                 private final TableViewer tableViewer;
 652
 653                 public ValuesEditingSupport(ColumnViewer viewer) {
 654                         super(viewer);
 655                         tableViewer = (TableViewer) viewer;
 656                 }
 657
 658                 @Override
 659                 protected CellEditor getCellEditor(Object element) {
 660                         try {
 661                                 Node specAttrNode = (Node) element;
 662                                 if (specAttrNode
 663                                                 .isNodeType(SlcTypes.SLC_PRIMITIVE_SPEC_ATTRIBUTE))
 664                                         return new TextCellEditor(tableViewer.getTable());
 665                                 return null;
 666                         } catch (RepositoryException e) {
 667                                 throw new SlcException("Cannot get celle editor", e);
 668                         }
 669                 }
 670
 671                 @Override
 672                 protected boolean canEdit(Object element) {
 673                         try {
 674                                 Node specAttrNode = (Node) element;
 675                                 return !(specAttrNode.getProperty(SLC_IS_IMMUTABLE)
 676                                                 .getBoolean() || specAttrNode.getProperty(
 677                                                 SLC_IS_CONSTANT).getBoolean())
 678                                                 && specAttrNode
 679                                                                 .isNodeType(SlcTypes.SLC_PRIMITIVE_SPEC_ATTRIBUTE);
 680                         } catch (RepositoryException e) {
 681                                 throw new SlcException("Cannot check canEdit", e);
 682                         }
 683                 }
 684
 685                 @Override
 686                 protected Object getValue(Object element) {
 687                         Node specAttrNode = (Node) element;
 688                         try {
 689                                 Object value = getAttributeSpecValue(specAttrNode);
 690                                 if (value == null)
 691                                         throw new SlcException("Unsupported attribute " + element);
 692                                 if (specAttrNode
 693                                                 .isNodeType(SlcTypes.SLC_PRIMITIVE_SPEC_ATTRIBUTE))
 694                                         return value.toString();
 695                                 return value;
 696                         } catch (RepositoryException e) {
 697                                 throw new SlcException("Cannot get value for " + element, e);
 698                         }
 699                 }
 700
 701                 @Override
 702                 protected void setValue(Object element, Object value) {
 703                         try {
 704                                 Node specAttrNode = (Node) element;
 705                                 if (specAttrNode
 706                                                 .isNodeType(SlcTypes.SLC_PRIMITIVE_SPEC_ATTRIBUTE)) {
 707                                         String type = specAttrNode.getProperty(SLC_TYPE)
 708                                                         .getString();
 709                                         SlcJcrUtils.setPrimitiveAsProperty(specAttrNode, SLC_VALUE,
 710                                                         type, value);
 711                                         valuesViewer.refresh();
 712                                         formPart.markDirty();
 713                                 }
 714                         } catch (RepositoryException e) {
 715                                 throw new SlcException("Cannot get celle editor", e);
 716                         }
 717                 }
 718
 719         }
 720 }