Examples of javax.swing.undo.CannotUndoException

javax.swing.undo.CannotUndoException
Thrown when an UndoableEdit is told to undo() and can't.
Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beans package. Please see {@link java.beans.XMLEncoder}. @author Ray Ryan

        
        RenameRefactoringDialog.Result renameResult = renameDialog.display();
        if(renameResult != null){
            gemCutter.recompileWorkspace(true);
        } else {
            throw new CannotUndoException();
        }        
    }

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                JOptionPane.showMessageDialog(gemCutter, "Error reloading functional agent: " + fanpe.getEntityName(), 
                        "Reload error", JOptionPane.WARNING_MESSAGE);
            }
            gemCutter.recompileWorkspace(true);
        } else {
            throw new CannotUndoException();
        }        
    }

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      if (arg0 == null || !isInProgress())
        super.undo();
      else {
        UndoableEdit edit = super.editToBeUndone();
        if (edit == null)
          throw new CannotUndoException();        
      doIt = true;
        if (edit instanceof WoPeDUndoableEdit) {
          WoPeDUndoableEdit wopedEdit = (WoPeDUndoableEdit) edit; 
          if (wopedEdit.getInserted() != null){
            for (int i = 0; i < wopedEdit.getInserted().length; i++){

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  if (arg0 == null || !isInProgress())
    super.redo();
  else {
    UndoableEdit edit = super.editToBeRedone();
    if (edit == null)
      throw new CannotUndoException();        
    doIt = true;
    if (edit instanceof WoPeDUndoableEdit) {
      WoPeDUndoableEdit wopedEdit = (WoPeDUndoableEdit) edit; 
      if (wopedEdit.getRemoved() != null){
        for (int i = 0; i < wopedEdit.getRemoved().length; i++){

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      super.undo();
    else {
      UndoableEdit edit = editToBeUndone(source);
      //System.out.println("undoTo edit="+edit);
      if (edit == null)
        throw new CannotUndoException();
      undoTo(edit);
    }
  }

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  }


  /* inherited methods */
  public void undo() throws CannotUndoException {
    if (editedLayer == null) {
      throw new CannotUndoException();
    }
    layerUndo.copyTo(editedLayer);
  }

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  @Override
  public IStatus undo(IProgressMonitor monitor, IAdaptable info)
      throws ExecutionException {
    if (editedLayer == null) {
      throw new CannotUndoException();
    }
    layerUndo.copyTo(editedLayer);
    return Status.OK_STATUS;
  }

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    /**
     * Always throws a <code>CannotUndoException</code>.
     */
    @Override
    public void undoEdit() throws CannotUndoException {
        throw new CannotUndoException();
    }

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                // Get the Positions in the range being removed.
                posRefs = getPositionsInRange(null, offset, length);
                string = getString(offset, length);
                remove(offset, length);
            } catch (BadLocationException bl) {
              throw new CannotUndoException();
            }
        }

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                    updateUndoPositions(posRefs, offset, length);
                    posRefs = null;
                }
                string = null;
            } catch (BadLocationException bl) {
              throw new CannotUndoException();
            }
        }

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