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.

                public void run() {
                  firePropertyChange(IEditorPart.PROP_DIRTY);


                  // Try to select the affected objects.
                  //
                  Command mostRecentCommand = ((CommandStack)event.getSource()).getMostRecentCommand();
                  if (mostRecentCommand != null) {
                    setSelectionToViewer(mostRecentCommand.getAffectedObjects());
                  }
                  if (propertySheetPage != null && !propertySheetPage.getControl().isDisposed()) {
                    propertySheetPage.refresh();
                  }
                }

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                public void run() {
                  firePropertyChange(IEditorPart.PROP_DIRTY);


                  // Try to select the affected objects.
                  //
                  Command mostRecentCommand = ((CommandStack)event.getSource()).getMostRecentCommand();
                  if (mostRecentCommand != null) {
                    setSelectionToViewer(mostRecentCommand.getAffectedObjects());
                  }
                  if (propertySheetPage != null && !propertySheetPage.getControl().isDisposed()) {
                    propertySheetPage.refresh();
                  }
                }

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                public void run() {
                  firePropertyChange(IEditorPart.PROP_DIRTY);


                  // Try to select the affected objects.
                  //
                  Command mostRecentCommand = ((CommandStack)event.getSource()).getMostRecentCommand();
                  if (mostRecentCommand != null) {
                    setSelectionToViewer(mostRecentCommand.getAffectedObjects());
                  }
                  if (propertySheetPage != null && !propertySheetPage.getControl().isDisposed()) {
                    propertySheetPage.refresh();
                  }
                }

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                public void run() {
                  firePropertyChange(IEditorPart.PROP_DIRTY);


                  // Try to select the affected objects.
                  //
                  Command mostRecentCommand = ((CommandStack)event.getSource()).getMostRecentCommand();
                  if (mostRecentCommand != null) {
                    setSelectionToViewer(mostRecentCommand.getAffectedObjects());
                  }
                  if (propertySheetPage != null && !propertySheetPage.getControl().isDisposed()) {
                    propertySheetPage.refresh();
                  }
                }

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                {
                  firePropertyChange(IEditorPart.PROP_DIRTY);


                  // Try to select the affected objects.
                  //
                  Command mostRecentCommand = ((CommandStack)event.getSource()).getMostRecentCommand();
                  if (mostRecentCommand != null)
                  {
                    setSelectionToViewer(mostRecentCommand.getAffectedObjects());
                  }
                  if (propertySheetPage != null && !propertySheetPage.getControl().isDisposed())
                  {
                    propertySheetPage.refresh();
                  }

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                public void run() {
                  firePropertyChange(IEditorPart.PROP_DIRTY);


                  // Try to select the affected objects.
                  //
                  Command mostRecentCommand = ((CommandStack)event.getSource()).getMostRecentCommand();
                  if (mostRecentCommand != null) {
                    setSelectionToViewer(mostRecentCommand.getAffectedObjects());
                  }
                  if (propertySheetPage != null && !propertySheetPage.getControl().isDisposed()) {
                    propertySheetPage.refresh();
                  }
                }

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                public void run() {
                  firePropertyChange(IEditorPart.PROP_DIRTY);


                  // Try to select the affected objects.
                  //
                  Command mostRecentCommand = ((CommandStack)event.getSource()).getMostRecentCommand();
                  if (mostRecentCommand != null) {
                    setSelectionToViewer(mostRecentCommand.getAffectedObjects());
                  }
                  if (propertySheetPage != null && !propertySheetPage.getControl().isDisposed()) {
                    propertySheetPage.refresh();
                  }
                }

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                public void run() {
                  firePropertyChange(IEditorPart.PROP_DIRTY);


                  // Try to select the affected objects.
                  //
                  Command mostRecentCommand = ((CommandStack)event.getSource()).getMostRecentCommand();
                  if (mostRecentCommand != null) {
                    setSelectionToViewer(mostRecentCommand.getAffectedObjects());
                  }
                  if (propertySheetPage != null && !propertySheetPage.getControl().isDisposed()) {
                    propertySheetPage.refresh();
                  }
                }

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                public void run() {
                  firePropertyChange(IEditorPart.PROP_DIRTY);


                  // Try to select the affected objects.
                  //
                  Command mostRecentCommand = ((CommandStack)event.getSource()).getMostRecentCommand();
                  if (mostRecentCommand != null) {
                    setSelectionToViewer(mostRecentCommand.getAffectedObjects());
                  }
                  if (propertySheetPage != null && !propertySheetPage.getControl().isDisposed()) {
                    propertySheetPage.refresh();
                  }
                }

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    return null;
  }


  @Override
  public void setEnabled(Object evaluationContext) {
    Command deleteEntryCommand = null;
    Command removeValueCommand = 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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