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

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   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.editors;
  17
  18 import java.util.ArrayList;
  19 import java.util.Iterator;
  20 import java.util.List;
  21 import java.util.SortedSet;
  22 import java.util.TreeSet;
  23
  24 import javax.jcr.Node;
  25 import javax.jcr.NodeIterator;
  26 import javax.jcr.Property;
  27 import javax.jcr.RepositoryException;
  28 import javax.jcr.nodetype.NodeType;
  29 import javax.jcr.observation.Event;
  30 import javax.jcr.observation.EventListener;
  31 import javax.jcr.observation.ObservationManager;
  32 import javax.jcr.query.Query;
  33 import javax.jcr.query.QueryManager;
  34
  35 import org.argeo.ArgeoException;
  36 import org.argeo.eclipse.ui.jcr.AsyncUiEventListener;
  37 import org.argeo.jcr.JcrUtils;
  38 import org.argeo.slc.SlcException;
  39 import org.argeo.slc.client.ui.SlcImages;
  40 import org.argeo.slc.core.execution.PrimitiveAccessor;
  41 import org.argeo.slc.core.execution.PrimitiveUtils;
  42 import org.argeo.slc.execution.ExecutionProcess;
  43 import org.argeo.slc.jcr.SlcJcrUtils;
  44 import org.argeo.slc.jcr.SlcNames;
  45 import org.argeo.slc.jcr.SlcTypes;
  46 import org.eclipse.jface.viewers.CellEditor;
  47 import org.eclipse.jface.viewers.ColumnLabelProvider;
  48 import org.eclipse.jface.viewers.ColumnViewer;
  49 import org.eclipse.jface.viewers.ComboBoxCellEditor;
  50 import org.eclipse.jface.viewers.EditingSupport;
  51 import org.eclipse.jface.viewers.ISelectionChangedListener;
  52 import org.eclipse.jface.viewers.IStructuredContentProvider;
  53 import org.eclipse.jface.viewers.IStructuredSelection;
  54 import org.eclipse.jface.viewers.ITreeContentProvider;
  55 import org.eclipse.jface.viewers.SelectionChangedEvent;
  56 import org.eclipse.jface.viewers.StructuredSelection;
  57 import org.eclipse.jface.viewers.TableViewer;
  58 import org.eclipse.jface.viewers.TableViewerColumn;
  59 import org.eclipse.jface.viewers.TextCellEditor;
  60 import org.eclipse.jface.viewers.TreeViewer;
  61 import org.eclipse.jface.viewers.Viewer;
  62 import org.eclipse.jface.viewers.ViewerDropAdapter;
  63 import org.eclipse.swt.SWT;
  64 import org.eclipse.swt.custom.SashForm;
  65 import org.eclipse.swt.dnd.DND;
  66 import org.eclipse.swt.dnd.TextTransfer;
  67 import org.eclipse.swt.dnd.Transfer;
  68 import org.eclipse.swt.dnd.TransferData;
  69 import org.eclipse.swt.events.SelectionEvent;
  70 import org.eclipse.swt.events.SelectionListener;
  71 import org.eclipse.swt.graphics.Image;
  72 import org.eclipse.swt.layout.FillLayout;
  73 import org.eclipse.swt.layout.GridData;
  74 import org.eclipse.swt.layout.GridLayout;
  75 import org.eclipse.swt.layout.RowData;
  76 import org.eclipse.swt.layout.RowLayout;
  77 import org.eclipse.swt.widgets.Button;
  78 import org.eclipse.swt.widgets.Composite;
  79 import org.eclipse.swt.widgets.Label;
  80 import org.eclipse.swt.widgets.Menu;
  81 import org.eclipse.swt.widgets.MenuItem;
  82 import org.eclipse.swt.widgets.Table;
  83 import org.eclipse.ui.forms.AbstractFormPart;
  84 import org.eclipse.ui.forms.IManagedForm;
  85 import org.eclipse.ui.forms.editor.FormPage;
  86 import org.eclipse.ui.forms.widgets.FormToolkit;
  87 import org.eclipse.ui.forms.widgets.ScrolledForm;
  88
  89 /** Definition of the process. */
  90 public class ProcessBuilderPage extends FormPage implements SlcNames {
  91         // private final static Log log =
  92         // LogFactory.getLog(ProcessBuilderPage.class);
  93
  94         public final static String ID = "processBuilderPage";
  95
  96         /** To be displayed in empty lists */
  97         final static String NONE = "<none>";
  98
  99         private Node processNode;
 100
 101         private TreeViewer flowsViewer;
 102         private TableViewer valuesViewer;
 103         private Label statusLabel;
 104         private Button run;
 105         private Button remove;
 106         private Button clear;
 107
 108         private AbstractFormPart formPart;
 109         private EventListener statusObserver;
 110
 111         public ProcessBuilderPage(ProcessEditor editor, Node processNode) {
 112                 super(editor, ID, "Definition");
 113                 this.processNode = processNode;
 114         }
 115
 116         @Override
 117         protected void createFormContent(IManagedForm mf) {
 118                 try {
 119                         ScrolledForm form = mf.getForm();
 120                         form.setExpandHorizontal(true);
 121                         form.setExpandVertical(true);
 122                         form.setText("Process " + processNode.getName());
 123                         GridLayout mainLayout = new GridLayout(1, true);
 124                         form.getBody().setLayout(mainLayout);
 125
 126                         createControls(form.getBody());
 127                         createBuilder(form.getBody());
 128
 129                         // form
 130                         formPart = new AbstractFormPart() {
 131
 132                         };
 133                         getManagedForm().addPart(formPart);
 134
 135                         // observation
 136                         statusObserver = new AsyncUiEventListener(form.getDisplay()) {
 137                                 protected void onEventInUiThread(List<Event> events) {
 138                                         statusChanged();
 139                                 }
 140                         };
 141                         ObservationManager observationManager = processNode.getSession()
 142                                         .getWorkspace().getObservationManager();
 143                         observationManager.addEventListener(statusObserver,
 144                                         Event.PROPERTY_CHANGED, processNode.getPath(), true, null,
 145                                         null, false);
 146
 147                         // make sure all controls are in line with status
 148                         statusChanged();
 149
 150                         // add initial flows
 151                         addInitialFlows();
 152
 153                 } catch (RepositoryException e) {
 154                         throw new ArgeoException("Cannot create form content", e);
 155                 }
 156         }
 157
 158         protected void createControls(Composite parent) {
 159                 FormToolkit tk = getManagedForm().getToolkit();
 160
 161                 Composite controls = tk.createComposite(parent);
 162                 controls.setLayout(new RowLayout());
 163                 controls.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
 164
 165                 run = tk.createButton(controls, null, SWT.PUSH);
 166                 run.setToolTipText("Run");
 167                 run.setImage(SlcImages.LAUNCH);
 168                 run.addSelectionListener(new SelectionListener() {
 169                         public void widgetSelected(SelectionEvent e) {
 170                                 if (isFinished(getProcessStatus())) {
 171                                         ((ProcessEditor) getEditor()).relaunch();
 172                                 } else if (isRunning(getProcessStatus())) {
 173                                         ((ProcessEditor) getEditor()).kill();
 174                                 } else {
 175                                         ((ProcessEditor) getEditor()).process();
 176                                 }
 177                         }
 178
 179                         public void widgetDefaultSelected(SelectionEvent e) {
 180                                 widgetSelected(e);
 181                         }
 182                 });
 183
 184                 remove = tk.createButton(controls, null, SWT.PUSH);
 185                 remove.setImage(SlcImages.REMOVE_ONE);
 186                 remove.setToolTipText("Remove selected flows");
 187                 remove.addSelectionListener(new SelectionListener() {
 188                         public void widgetSelected(SelectionEvent e) {
 189                                 removeSelectedFlows();
 190                         }
 191
 192                         public void widgetDefaultSelected(SelectionEvent e) {
 193                                 widgetSelected(e);
 194                         }
 195                 });
 196
 197                 clear = tk.createButton(controls, null, SWT.PUSH);
 198                 clear.setImage(SlcImages.REMOVE_ALL);
 199                 clear.setToolTipText("Clear all flows");
 200                 clear.addSelectionListener(new SelectionListener() {
 201                         public void widgetSelected(SelectionEvent e) {
 202                                 removeAllFlows();
 203                         }
 204
 205                         public void widgetDefaultSelected(SelectionEvent e) {
 206                                 widgetSelected(e);
 207                         }
 208                 });
 209
 210                 Composite statusComposite = tk.createComposite(controls);
 211                 RowData rowData = new RowData();
 212                 rowData.width = 100;
 213                 rowData.height = 16;
 214                 statusComposite.setLayoutData(rowData);
 215                 statusComposite.setLayout(new FillLayout());
 216                 statusLabel = tk.createLabel(statusComposite, getProcessStatus());
 217
 218         }
 219
 220         protected void createBuilder(Composite parent) {
 221                 FormToolkit tk = getManagedForm().getToolkit();
 222                 SashForm sashForm = new SashForm(parent, SWT.HORIZONTAL);
 223                 sashForm.setSashWidth(4);
 224                 GridData sahFormGd = new GridData(SWT.FILL, SWT.FILL, true, true);
 225                 sahFormGd.widthHint = 400;
 226                 sashForm.setLayoutData(sahFormGd);
 227
 228                 Composite flowsComposite = tk.createComposite(sashForm);
 229                 flowsComposite.setLayout(new GridLayout(1, false));
 230
 231                 flowsViewer = new TreeViewer(flowsComposite);
 232                 flowsViewer.getTree().setLayoutData(
 233                                 new GridData(SWT.FILL, SWT.FILL, true, true));
 234                 flowsViewer.setLabelProvider(new FlowsLabelProvider());
 235                 flowsViewer.setContentProvider(new FlowsContentProvider());
 236                 flowsViewer.addSelectionChangedListener(new FlowsSelectionListener());
 237
 238                 int operations = DND.DROP_COPY | DND.DROP_MOVE;
 239                 Transfer[] tt = new Transfer[] { TextTransfer.getInstance() };
 240                 flowsViewer.addDropSupport(operations, tt, new FlowsDropListener(
 241                                 flowsViewer));
 242
 243                 // Context menu
 244                 addContextMenu();
 245
 246                 flowsViewer.setInput(getEditorSite());
 247                 flowsViewer.setInput(processNode);
 248
 249                 Composite valuesComposite = tk.createComposite(sashForm);
 250                 valuesComposite.setLayout(new GridLayout(1, false));
 251
 252                 valuesViewer = new TableViewer(valuesComposite);
 253                 GridData valuedGd = new GridData(SWT.FILL, SWT.FILL, true, true);
 254                 // valuedGd.widthHint = 200;
 255                 valuesViewer.getTable().setLayoutData(valuedGd);
 256                 valuesViewer.getTable().setHeaderVisible(true);
 257
 258                 valuesViewer.setContentProvider(new ValuesContentProvider());
 259                 initializeValuesViewer(valuesViewer);
 260                 sashForm.setWeights(getWeights());
 261                 valuesViewer.setInput(getEditorSite());
 262         }
 263
 264         /** Creates the columns of the values viewer */
 265         protected void initializeValuesViewer(TableViewer viewer) {
 266                 String[] titles = { "Name", "Value" };
 267                 int[] bounds = { 200, 100 };
 268
 269                 for (int i = 0; i < titles.length; i++) {
 270                         TableViewerColumn column = new TableViewerColumn(viewer, SWT.NONE);
 271                         column.getColumn().setText(titles[i]);
 272                         column.getColumn().setWidth(bounds[i]);
 273                         column.getColumn().setResizable(true);
 274                         column.getColumn().setMoveable(true);
 275                         if (i == 0) {
 276                                 column.setLabelProvider(new ColumnLabelProvider() {
 277                                         public String getText(Object element) {
 278                                                 try {
 279                                                         Node specAttrNode = (Node) element;
 280                                                         return specAttrNode.getName();
 281                                                 } catch (RepositoryException e) {
 282                                                         throw new SlcException("Cannot get value", e);
 283                                                 }
 284                                         }
 285                                 });
 286                         } else if (i == 1) {
 287                                 column.setLabelProvider(new ColumnLabelProvider() {
 288                                         public String getText(Object element) {
 289                                                 return getAttributeSpecText((Node) element);
 290                                         }
 291                                 });
 292                                 column.setEditingSupport(new ValuesEditingSupport(viewer));
 293                         }
 294
 295                 }
 296                 Table table = viewer.getTable();
 297                 table.setHeaderVisible(false);
 298                 table.setLinesVisible(true);
 299         }
 300
 301         protected int[] getWeights() {
 302                 return new int[] { 50, 50 };
 303         }
 304
 305         /*
 306          * CONTROLLERS
 307          */
 308         /** Reflects a status change */
 309         protected void statusChanged() {
 310                 String status = getProcessStatus();
 311                 statusLabel.setText(status);
 312                 Boolean isEditable = isEditable(status);
 313                 run.setEnabled(status.equals(ExecutionProcess.RUNNING) || isEditable);
 314                 remove.setEnabled(isEditable);
 315                 clear.setEnabled(isEditable);
 316                 // flowsViewer.getTree().setEnabled(isEditable);
 317                 if (status.equals(ExecutionProcess.RUNNING)) {
 318                         run.setEnabled(true);
 319                         run.setImage(SlcImages.KILL);
 320                         run.setToolTipText("Kill");
 321                 } else if (isFinished(status)) {
 322                         run.setEnabled(true);
 323                         run.setImage(SlcImages.RELAUNCH);
 324                         run.setToolTipText("Relaunch");
 325                 }
 326
 327                 if (flowsViewer != null)
 328                         flowsViewer.refresh();
 329         }
 330
 331         /** Adds initial flows from the editor input if any */
 332         protected void addInitialFlows() {
 333                 for (String path : ((ProcessEditorInput) getEditorInput())
 334                                 .getInitialFlowPaths()) {
 335                         addFlow(path);
 336                 }
 337         }
 338
 339         /**
 340          * Adds a new flow.
 341          *
 342          * @param path
 343          *            the path of the flow
 344          */
 345         protected void addFlow(String path) {
 346                 try {
 347                         Node flowNode = processNode.getSession().getNode(path);
 348                         Node realizedFlowNode = processNode.getNode(SLC_FLOW).addNode(
 349                                         SLC_FLOW);
 350                         realizedFlowNode.addMixin(SlcTypes.SLC_REALIZED_FLOW);
 351                         Node address = realizedFlowNode.addNode(SLC_ADDRESS,
 352                                         NodeType.NT_ADDRESS);
 353                         address.setProperty(Property.JCR_PATH, path);
 354
 355                         // copy spec attributes
 356                         Node specAttrsBase;
 357                         if (flowNode.hasProperty(SLC_SPEC)) {
 358                                 Node executionSpecNode = flowNode.getProperty(SLC_SPEC)
 359                                                 .getNode();
 360                                 specAttrsBase = executionSpecNode;
 361                                 String executionSpecName = executionSpecNode.getProperty(
 362                                                 SLC_NAME).getString();
 363                                 realizedFlowNode.setProperty(SLC_SPEC, executionSpecName);
 364                         } else
 365                                 specAttrsBase = flowNode;
 366
 367                         specAttrs: for (NodeIterator nit = specAttrsBase.getNodes(); nit
 368                                         .hasNext();) {
 369                                 Node specAttrNode = nit.nextNode();
 370                                 String attrName = specAttrNode.getName();
 371                                 if (!specAttrNode
 372                                                 .isNodeType(SlcTypes.SLC_EXECUTION_SPEC_ATTRIBUTE))
 373                                         continue specAttrs;
 374                                 Node realizedAttrNode = realizedFlowNode.addNode(specAttrNode
 375                                                 .getName());
 376                                 JcrUtils.copy(specAttrNode, realizedAttrNode);
 377
 378                                 // override with flow value
 379                                 if (flowNode.hasNode(attrName)) {
 380                                         // assuming this is a primitive
 381                                         Node attrNode = flowNode.getNode(attrName);
 382                                         if (attrNode.hasProperty(SLC_VALUE))
 383                                                 realizedAttrNode.setProperty(SLC_VALUE, attrNode
 384                                                                 .getProperty(SLC_VALUE).getValue());
 385                                 }
 386                         }
 387
 388                         flowsViewer.refresh();
 389                         formPart.markDirty();
 390                 } catch (RepositoryException e) {
 391                         throw new SlcException("Cannot drop " + path, e);
 392                 }
 393         }
 394
 395         @SuppressWarnings("unchecked")
 396         protected void removeSelectedFlows() {
 397                 if (!flowsViewer.getSelection().isEmpty()) {
 398                         Iterator<Object> it = ((StructuredSelection) flowsViewer
 399                                         .getSelection()).iterator();
 400                         while (it.hasNext()) {
 401                                 Node node = (Node) it.next();
 402                                 try {
 403                                         node.remove();
 404                                 } catch (RepositoryException e) {
 405                                         throw new ArgeoException("Cannot remove " + node, e);
 406                                 }
 407                         }
 408                         flowsViewer.refresh();
 409                         formPart.markDirty();
 410                 }
 411         }
 412
 413         protected void removeAllFlows() {
 414                 try {
 415                         for (NodeIterator nit = processNode.getNode(SLC_FLOW).getNodes(); nit
 416                                         .hasNext();) {
 417                                 nit.nextNode().remove();
 418                         }
 419                         flowsViewer.refresh();
 420                         formPart.markDirty();
 421                 } catch (RepositoryException e) {
 422                         throw new ArgeoException("Cannot remove flows from " + processNode,
 423                                         e);
 424                 }
 425         }
 426
 427         public void commit(Boolean onSave) {
 428                 if (onSave)
 429                         statusLabel.setText(getProcessStatus());
 430                 formPart.commit(onSave);
 431         }
 432
 433         /*
 434          * STATE
 435          */
 436         protected String getProcessStatus() {
 437                 try {
 438                         return processNode.getProperty(SLC_STATUS).getString();
 439                 } catch (RepositoryException e) {
 440                         throw new SlcException("Cannot retrieve status for " + processNode,
 441                                         e);
 442                 }
 443         }
 444
 445         /** Optimization so that we don't call the node each time */
 446         protected static Boolean isEditable(String status) {
 447                 return status.equals(ExecutionProcess.NEW)
 448                                 || status.equals(ExecutionProcess.INITIALIZED);
 449         }
 450
 451         protected static Boolean isFinished(String status) {
 452                 return status.equals(ExecutionProcess.COMPLETED)
 453                                 || status.equals(ExecutionProcess.ERROR)
 454                                 || status.equals(ExecutionProcess.KILLED);
 455         }
 456
 457         protected static Boolean isRunning(String status) {
 458                 return status.equals(ExecutionProcess.RUNNING);
 459         }
 460
 461         /*
 462          * LIFECYCLE
 463          */
 464         @Override
 465         public void dispose() {
 466                 JcrUtils.unregisterQuietly(processNode, statusObserver);
 467                 super.dispose();
 468         }
 469
 470         /*
 471          * UTILITIES
 472          */
 473         protected static String getAttributeSpecText(Node specAttrNode) {
 474                 try {
 475                         if (specAttrNode.isNodeType(SlcTypes.SLC_PRIMITIVE_SPEC_ATTRIBUTE)) {
 476                                 if (!specAttrNode.hasProperty(SLC_VALUE))
 477                                         return "";
 478                                 String type = specAttrNode.getProperty(SLC_TYPE).getString();
 479                                 if (PrimitiveAccessor.TYPE_PASSWORD.equals(type))
 480                                         return "****************";
 481                                 Object value = PrimitiveUtils.convert(type, specAttrNode
 482                                                 .getProperty(SLC_VALUE).getString());
 483                                 return value.toString();
 484                         } else if (specAttrNode.isNodeType(SlcTypes.SLC_REF_SPEC_ATTRIBUTE)) {
 485                                 if (specAttrNode.hasProperty(SLC_VALUE)) {
 486                                         int value = (int) specAttrNode.getProperty(SLC_VALUE)
 487                                                         .getLong();
 488                                         NodeIterator children = specAttrNode.getNodes();
 489                                         int index = 0;
 490                                         while (children.hasNext()) {
 491                                                 Node child = children.nextNode();
 492                                                 if (index == value)
 493                                                         return child.getProperty(Property.JCR_TITLE)
 494                                                                         .getString();
 495                                                 index++;
 496                                         }
 497                                         throw new SlcException("No child node with index " + value
 498                                                         + " for spec attribute " + specAttrNode);
 499                                 } else
 500                                         return "";
 501                         }
 502                         throw new SlcException("Unsupported type for spec attribute "
 503                                         + specAttrNode);
 504                 } catch (RepositoryException e) {
 505                         throw new SlcException("Cannot get value", e);
 506                 }
 507         }
 508
 509         /*
 510          * FLOWS SUBCLASSES
 511          */
 512         class FlowsContentProvider implements ITreeContentProvider {
 513                 public Object[] getElements(Object obj) {
 514                         if (!(obj instanceof Node))
 515                                 return new Object[0];
 516
 517                         try {
 518                                 Node node = (Node) obj;
 519                                 List<Node> children = new ArrayList<Node>();
 520                                 for (NodeIterator nit = node.getNode(SLC_FLOW).getNodes(); nit
 521                                                 .hasNext();) {
 522                                         Node flowNode = nit.nextNode();
 523                                         children.add(flowNode);
 524                                 }
 525                                 return children.toArray();
 526                         } catch (RepositoryException e) {
 527                                 throw new SlcException("Cannot list flows of " + obj, e);
 528                         }
 529                 }
 530
 531                 public void inputChanged(Viewer arg0, Object arg1, Object arg2) {
 532                 }
 533
 534                 public void dispose() {
 535                 }
 536
 537                 public Object[] getChildren(Object parentElement) {
 538                         // no children for the time being
 539                         return null;
 540                 }
 541
 542                 public Object getParent(Object element) {
 543                         return null;
 544                 }
 545
 546                 public boolean hasChildren(Object element) {
 547                         return false;
 548                 }
 549
 550         }
 551
 552         static class FlowsLabelProvider extends ColumnLabelProvider {
 553                 @Override
 554                 public String getText(Object element) {
 555                         Node node = (Node) element;
 556                         try {
 557                                 if (node.isNodeType(SlcTypes.SLC_REALIZED_FLOW)) {
 558                                         if (node.hasNode(SLC_ADDRESS)) {
 559                                                 String path = node.getNode(SLC_ADDRESS)
 560                                                                 .getProperty(Property.JCR_PATH).getString();
 561                                                 String executionModuleName = SlcJcrUtils
 562                                                                 .moduleName(path);
 563                                                 // Node executionModuleNode = node.getSession().getNode(
 564                                                 // SlcJcrUtils.modulePath(path));
 565                                                 // String executionModuleName = executionModuleNode
 566                                                 // .getProperty(SLC_NAME).getString();
 567                                                 return executionModuleName + ":"
 568                                                                 + SlcJcrUtils.flowRelativePath(path);
 569                                         }
 570                                 }
 571                         } catch (RepositoryException e) {
 572                                 throw new SlcException("Cannot display " + element, e);
 573                         }
 574                         return super.getText(element);
 575                 }
 576
 577                 @Override
 578                 public Image getImage(Object element) {
 579                         Node node = (Node) element;
 580                         try {
 581                                 if (node.isNodeType(SlcTypes.SLC_REALIZED_FLOW)) {
 582                                         if (node.hasProperty(SLC_STATUS)) {
 583                                                 String status = node.getProperty(SLC_STATUS)
 584                                                                 .getString();
 585                                                 // TODO: factorize with process view ?
 586                                                 if (status.equals(ExecutionProcess.RUNNING))
 587                                                         return SlcImages.PROCESS_RUNNING;
 588                                                 else if (status.equals(ExecutionProcess.ERROR)
 589                                                                 || status.equals(ExecutionProcess.KILLED))
 590                                                         return SlcImages.PROCESS_ERROR;
 591                                                 else if (status.equals(ExecutionProcess.COMPLETED))
 592                                                         return SlcImages.PROCESS_COMPLETED;
 593                                         }
 594                                         return SlcImages.FLOW;
 595                                 }
 596                         } catch (RepositoryException e) {
 597                                 throw new SlcException("Cannot display " + element, e);
 598                         }
 599                         return super.getImage(element);
 600                 }
 601
 602         }
 603
 604         /** Parameter view is updated each time a new line is selected */
 605         class FlowsSelectionListener implements ISelectionChangedListener {
 606                 public void selectionChanged(SelectionChangedEvent evt) {
 607                         if (evt.getSelection().isEmpty()) {
 608                                 valuesViewer.setInput(getEditorSite());
 609                                 return;
 610                         }
 611                         Node realizedFlowNode = (Node) ((IStructuredSelection) evt
 612                                         .getSelection()).getFirstElement();
 613                         valuesViewer.setInput(realizedFlowNode);
 614                 }
 615         }
 616
 617         /**
 618          * Add a context menu that call private methods. It only relies on selected
 619          * item(s) not on parameter that are passed in the menuAboutToShow method
 620          **/
 621         private void addContextMenu() {
 622                 Menu menu = new Menu(flowsViewer.getControl());
 623
 624                 MenuItem removeItems = new MenuItem(menu, SWT.PUSH);
 625                 removeItems.addSelectionListener(new SelectionListener() {
 626
 627                         public void widgetSelected(SelectionEvent e) {
 628                                 removeSelectedFlows();
 629                         }
 630
 631                         public void widgetDefaultSelected(SelectionEvent e) {
 632                         }
 633                 });
 634                 removeItems.setText("Remove selected flow(s)");
 635
 636                 MenuItem removeAllItems = new MenuItem(menu, SWT.PUSH);
 637                 removeAllItems.addSelectionListener(new SelectionListener() {
 638
 639                         public void widgetSelected(SelectionEvent e) {
 640                                 removeAllFlows();
 641                         }
 642
 643                         public void widgetDefaultSelected(SelectionEvent e) {
 644                         }
 645                 });
 646                 removeAllItems.setText("Remove all flows");
 647                 flowsViewer.getTree().setMenu(menu);
 648         }
 649
 650         /** Manages drop event. */
 651         class FlowsDropListener extends ViewerDropAdapter {
 652
 653                 public FlowsDropListener(Viewer viewer) {
 654                         super(viewer);
 655                 }
 656
 657                 @Override
 658                 public boolean performDrop(Object data) {
 659
 660                         // Parse the received String, paths are separated with a carriage
 661                         // return
 662                         String[] paths = data.toString().split(new String("\n"));
 663                         SortedSet<String> resultPaths = new TreeSet<String>();
 664                         for (String path : paths) {
 665                                 try {
 666                                         // either a node or a whole directory can have been dragged
 667                                         QueryManager qm = processNode.getSession().getWorkspace()
 668                                                         .getQueryManager();
 669                                         String statement = "SELECT * FROM ["
 670                                                         + SlcTypes.SLC_EXECUTION_FLOW
 671                                                         + "] WHERE ISDESCENDANTNODE(['" + path
 672                                                         + "']) OR ISSAMENODE(['" + path + "'])";
 673                                         Query query = qm.createQuery(statement, Query.JCR_SQL2);
 674
 675                                         // order paths
 676                                         for (NodeIterator nit = query.execute().getNodes(); nit
 677                                                         .hasNext();) {
 678                                                 String currPath = nit.nextNode().getPath();
 679                                                 // do not add twice a same flow
 680                                                 if (!resultPaths.contains(currPath))
 681                                                         resultPaths.add(currPath);
 682                                         }
 683                                 } catch (RepositoryException e) {
 684                                         throw new SlcException("Cannot query flows under " + path,
 685                                                         e);
 686                                 }
 687                         }
 688                         for (String p : resultPaths) {
 689                                 addFlow(p);
 690                         }
 691                         return true;
 692
 693                 }
 694
 695                 @Override
 696                 public boolean validateDrop(Object target, int operation,
 697                                 TransferData transferType) {
 698                         return isEditable(getProcessStatus());
 699                 }
 700         }
 701
 702         /*
 703          * VALUES SUBCLASSES
 704          */
 705         static class ValuesContentProvider implements IStructuredContentProvider {
 706
 707                 public Object[] getElements(Object inputElement) {
 708                         if (!(inputElement instanceof Node))
 709                                 return new Object[0];
 710
 711                         try {
 712                                 Node realizedFlowNode = (Node) inputElement;
 713                                 List<Node> specAttributes = new ArrayList<Node>();
 714                                 specAttrs: for (NodeIterator nit = realizedFlowNode.getNodes(); nit
 715                                                 .hasNext();) {
 716                                         Node specAttrNode = nit.nextNode();
 717                                         if (!specAttrNode
 718                                                         .isNodeType(SlcTypes.SLC_EXECUTION_SPEC_ATTRIBUTE))
 719                                                 continue specAttrs;
 720                                         // workaround to enable hiding of necessary but unusable
 721                                         // flow parameters
 722                                         else if (specAttrNode.hasProperty(SlcNames.SLC_IS_HIDDEN)
 723                                                         && specAttrNode.getProperty(SlcNames.SLC_IS_HIDDEN)
 724                                                                         .getBoolean())
 725                                                 continue specAttrs;
 726                                         specAttributes.add(specAttrNode);
 727                                 }
 728                                 return specAttributes.toArray();
 729                         } catch (RepositoryException e) {
 730                                 throw new SlcException("Cannot get elements", e);
 731                         }
 732                 }
 733
 734                 public void dispose() {
 735                 }
 736
 737                 public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 738                 }
 739         }
 740
 741         class ValuesEditingSupport extends EditingSupport {
 742                 private final TableViewer tableViewer;
 743
 744                 public ValuesEditingSupport(ColumnViewer viewer) {
 745                         super(viewer);
 746                         tableViewer = (TableViewer) viewer;
 747                 }
 748
 749                 @Override
 750                 protected CellEditor getCellEditor(Object element) {
 751                         try {
 752                                 Node specAttrNode = (Node) element;
 753                                 if (specAttrNode
 754                                                 .isNodeType(SlcTypes.SLC_PRIMITIVE_SPEC_ATTRIBUTE)) {
 755                                         String type = specAttrNode.getProperty(SLC_TYPE)
 756                                                         .getString();
 757                                         if (PrimitiveAccessor.TYPE_PASSWORD.equals(type)) {
 758                                                 return new TextCellEditor(tableViewer.getTable(),
 759                                                                 SWT.PASSWORD);
 760                                         } else {
 761                                                 return new TextCellEditor(tableViewer.getTable());
 762                                         }
 763                                 } else if (specAttrNode
 764                                                 .isNodeType(SlcTypes.SLC_REF_SPEC_ATTRIBUTE)) {
 765                                         NodeIterator children = specAttrNode.getNodes();
 766                                         ArrayList<String> items = new ArrayList<String>();
 767                                         while (children.hasNext()) {
 768                                                 Node child = children.nextNode();
 769                                                 if (child.isNodeType(NodeType.MIX_TITLE))
 770                                                         items.add(child.getProperty(Property.JCR_TITLE)
 771                                                                         .getString());
 772                                         }
 773                                         return new ComboBoxCellEditor(tableViewer.getTable(),
 774                                                         items.toArray(new String[items.size()]));
 775                                 }
 776                                 return null;
 777                         } catch (RepositoryException e) {
 778                                 throw new SlcException("Cannot get cell editor", e);
 779                         }
 780                 }
 781
 782                 @Override
 783                 protected boolean canEdit(Object element) {
 784                         try {
 785                                 Node specAttrNode = (Node) element;
 786                                 Boolean cannotEdit = specAttrNode.getProperty(SLC_IS_IMMUTABLE)
 787                                                 .getBoolean()
 788                                                 || specAttrNode.getProperty(SLC_IS_CONSTANT)
 789                                                                 .getBoolean();
 790                                 return !cannotEdit && isSupportedAttributeType(specAttrNode);
 791                         } catch (RepositoryException e) {
 792                                 throw new SlcException("Cannot check whether " + element
 793                                                 + " is editable", e);
 794                         }
 795                 }
 796
 797                 /**
 798                  * Supports {@link SlcTypes#SLC_PRIMITIVE_SPEC_ATTRIBUTE} and
 799                  * {@link SlcTypes#SLC_REF_SPEC_ATTRIBUTE}
 800                  */
 801                 protected boolean isSupportedAttributeType(Node specAttrNode)
 802                                 throws RepositoryException {
 803                         return specAttrNode
 804                                         .isNodeType(SlcTypes.SLC_PRIMITIVE_SPEC_ATTRIBUTE)
 805                                         || specAttrNode.isNodeType(SlcTypes.SLC_REF_SPEC_ATTRIBUTE);
 806                 }
 807
 808                 @Override
 809                 protected Object getValue(Object element) {
 810                         Node specAttrNode = (Node) element;
 811                         try {
 812                                 if (specAttrNode
 813                                                 .isNodeType(SlcTypes.SLC_PRIMITIVE_SPEC_ATTRIBUTE)) {
 814                                         if (!specAttrNode.hasProperty(SLC_VALUE))
 815                                                 return NONE;
 816                                         String type = specAttrNode.getProperty(SLC_TYPE)
 817                                                         .getString();
 818                                         // TODO optimize based on data type?
 819                                         Object value = PrimitiveUtils.convert(type, specAttrNode
 820                                                         .getProperty(SLC_VALUE).getString());
 821                                         return value.toString();
 822                                 } else if (specAttrNode
 823                                                 .isNodeType(SlcTypes.SLC_REF_SPEC_ATTRIBUTE)) {
 824                                         if (!specAttrNode.hasProperty(SLC_VALUE))
 825                                                 return 0;
 826                                         // return the index of the sub node as set by setValue()
 827                                         // in the future we may manage references as well
 828                                         return (int) specAttrNode.getProperty(SLC_VALUE).getLong();
 829                                 }
 830                                 throw new SlcException("Unsupported type for spec attribute "
 831                                                 + specAttrNode);
 832                         } catch (RepositoryException e) {
 833                                 throw new SlcException("Cannot get value for " + element, e);
 834                         }
 835                 }
 836
 837                 @Override
 838                 protected void setValue(Object element, Object value) {
 839                         try {
 840                                 Node specAttrNode = (Node) element;
 841                                 if (specAttrNode
 842                                                 .isNodeType(SlcTypes.SLC_PRIMITIVE_SPEC_ATTRIBUTE)) {
 843                                         String type = specAttrNode.getProperty(SLC_TYPE)
 844                                                         .getString();
 845                                         SlcJcrUtils.setPrimitiveAsProperty(specAttrNode, SLC_VALUE,
 846                                                         type, value);
 847                                         valuesViewer.refresh();
 848                                         formPart.markDirty();
 849                                 } else if (specAttrNode
 850                                                 .isNodeType(SlcTypes.SLC_REF_SPEC_ATTRIBUTE)) {
 851                                         specAttrNode.setProperty(SLC_VALUE,
 852                                                         ((Integer) value).longValue());
 853                                         valuesViewer.refresh();
 854                                         formPart.markDirty();
 855                                 }
 856                         } catch (RepositoryException e) {
 857                                 throw new SlcException("Cannot get celle editor", e);
 858                         }
 859                 }
 860
 861         }
 862 }