Examples of org.eclipse.emf.common.command.Command

org.eclipse.emf.common.command.Command
An interface that every command is expected to support. A command can be tested for executability, it can be executed, it can be tested for undoability, it can be undone, and can then be redone. A command also provides access to a result collection, an affected-objects collection, a label, and a description.
There are important constraints on the valid order in which the various methods may be invoked, e.g., you cannot ask for the result before you've executed the command. These constraints are documented with the various methods.

        getViewSite().getShell().getDisplay().asyncExec(new Runnable() {


          @Override
          public void run() {
            update();
            Command mostRecentCommand = ((CommandStack) event.getSource()).getMostRecentCommand();
            if (mostRecentCommand != null) {
              setSelectionToViewer(mostRecentCommand.getAffectedObjects());
            }
            if (propertySheetPage != null && !propertySheetPage.getControl().isDisposed() && propertySheetPage.getCurrentTab() != null) {
              propertySheetPage.refresh();
            }
          }

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    }
  }


  @Override
  public void updateElement(UIElement element, @SuppressWarnings("rawtypes") Map parameters) {
    Command redoCommand = editingDomain.getCommandStack().getRedoCommand();
    if (redoCommand != null && redoCommand.getLabel() != null) {
      element.setText("&Redo " + redoCommand.getLabel());
    } else {
      element.setText("&Redo");
    }


  }

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      return null;
  }
  
  @Override
  public void setEnabled(Object evaluationContext) {
    Command pasteFromClipboardCommand = null;
    setBaseEnabled(false);
    Object obj = HandlerUtil.getVariable(evaluationContext, ISources.ACTIVE_CURRENT_SELECTION_NAME);
    if (obj instanceof IStructuredSelection) {
      IStructuredSelection selection = (IStructuredSelection) obj;
      if (selection.size() == 1) {

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    return null;
  }
  
  @Override
  public void setEnabled(Object evaluationContext) {
    Command createDestinationDataStoreEntryCommand = null;
    Command createDestinationDataCommand = null;
    setBaseEnabled(false);
    Object obj = HandlerUtil.getVariable(evaluationContext, ISources.ACTIVE_CURRENT_SELECTION_NAME);
    if (obj instanceof IStructuredSelection) {
      obj = ((IStructuredSelection)obj).getFirstElement();
      if (obj instanceof DestinationDataStore){

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    return null;
  }


  @Override
  public void setEnabled(Object evaluationContext) {
    Command cutToClipboardCommand = null;
    setBaseEnabled(false);
    Object obj = HandlerUtil.getVariable(evaluationContext, ISources.ACTIVE_CURRENT_SELECTION_NAME);
    if (obj instanceof IStructuredSelection) {
      IStructuredSelection selection = (IStructuredSelection) obj;
      if (selection.size() == 1) {

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    }
  }


  @Override
  public void updateElement(UIElement element, @SuppressWarnings("rawtypes") Map parameters) {
    Command undoCommand = editingDomain.getCommandStack().getUndoCommand();
    if (undoCommand != null && undoCommand.getLabel() != null) {
      element.setText("&Undo " + undoCommand.getLabel());
    } else {
      element.setText("&Undo");
    }


  }

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    return null;
  }
  
  @Override
  public void setEnabled(Object evaluationContext) {
    Command createServerDataStoreEntryCommand = null;
    Command createServerDataCommand = null;
    setBaseEnabled(false);
    Object obj = HandlerUtil.getVariable(evaluationContext, ISources.ACTIVE_CURRENT_SELECTION_NAME);
    if (obj instanceof IStructuredSelection) {
      obj = ((IStructuredSelection)obj).getFirstElement();
      if (obj instanceof ServerDataStore){

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      public void notifyChanged(Notification notification) {
        System.out.println("Changed.");
        String newContent = TracingUtil.createProxyContent(
            (EObject) target, names);
        if (!newContent.equals(value.getTheValue())) {
          Command cmd = SetCommand
              .create(domain,
                  object,
                  ReqIF10Package.Literals.SPEC_ELEMENT_WITH_ATTRIBUTES__VALUES,
                  newContent);
          domain.getCommandStack().execute(cmd);

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        .getTheValue();
    String currentContent = buildProxyContent(element);
    if (proxyContent.equals(currentContent))
      return;
    // Content differs: Update the Value.
    Command cmd = SetCommand.create(domain, proxyValue,
        ReqIF10Package.Literals.ATTRIBUTE_VALUE_STRING__THE_VALUE,
        currentContent);
    domain.getCommandStack().execute(cmd);
  }

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      if (tokenizer.hasMoreTokens())
        sb.append("\n");
      linenumber++;
    }
    // Content differs: Update the Value.
    Command cmd = SetCommand.create(domain, proxyValue,
        ReqIF10Package.Literals.ATTRIBUTE_VALUE_STRING__THE_VALUE,
        sb.toString());
    domain.getCommandStack().execute(cmd);
  }

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