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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        Resource resource = eclass.eResource();
        ResourceSet resourceSet = resource.getResourceSet();
        TransactionalEditingDomain domain = TransactionalEditingDomain.Factory.INSTANCE.createEditingDomain(resourceSet);
        try{
        if (domain != null){
          Command setCommand = domain.createCommand(SetCommand.class, new CommandParameter(eclass,
              EcorePackage.Literals.ENAMED_ELEMENT__NAME, newName));
          domain.getCommandStack().execute(setCommand);
          try {
            resource.save(Collections.emptyMap());
          } catch (IOException e) {

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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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              Object[] selection = initialObjectCreationPage.packageField.getSelection();
              if (selection != null && selection.length > 0) {
                JavaPack pack = (JavaPack)JexPackage.eINSTANCE.getEFactoryInstance().create(JexPackage.eINSTANCE.getJavaPack());
                pack.setName(((IJavaElement)selection[0]).getElementName());
                ((AbstractRequirement)rootObject).getJavaElements().add(pack);
                Command createChildrenCommand = null;
                if (initialObjectCreationPage.immediateChildrenButton.getSelection()) {
                  createChildrenCommand = new CreateChildrenFromJavaModelCommand(pack, Flags.AccPublic, false);
                } else if (initialObjectCreationPage.recursiveChildrenButton.getSelection()) {
                  createChildrenCommand = new CreateChildrenFromJavaModelCommand(pack, Flags.AccPublic, true);
                }
                if (createChildrenCommand != null && createChildrenCommand.canExecute()) {
                  createChildrenCommand.execute();
                }
              }
              // Save the contents of the resource to the file system.
              //
              Map options = new HashMap();

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    }
    return null;
  }
  
  public Object execute(ExecutionEvent event) throws ExecutionException {
    Command command = createEmfCommand(event);
    if (command != null && command.canExecute()) {
      EditingDomain editingDomain = getEditingDomain(event);
      if (editingDomain != null) {
        editingDomain.getCommandStack().execute(command);
      } else {
        command.execute();
      }
      return command.getAffectedObjects();
    }
    return null;
  }

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    private void updateModel() {
      EStructuralFeature structuralFeature = getEStructuralFeature();
      if (getEObject() != null && structuralFeature != null) {
        String value = text.getText().trim();
        if (isChanged(value, getFeatureValue())) {
          Command command = new SetCommand(editor.getEditingDomain(), getEObject(), structuralFeature, (value != null && value.length() > 0 ? value : null));
          editor.getEditingDomain().getCommandStack().execute(command);
  //      getEObject().eSet(structuralFeature, (value != null && value.length() > 0 ? value : null));
        }
      }
    }

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  @Override
  protected void okPressed() {
    IStatus status = validate();
    if ( status.isOK() ) {
      Command cmd = generateOkCommand();
      if ( cmd.canExecute() ) {
        cmd.execute();
        dbContext.updateModels();
        doCleanUp();
        super.okPressed();
      }
    }

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  @Override
  public void commitEdit(Cell<?> treeCell, Object newValue) {
    Object item = treeCell.getItem();
    Object value = EcoreUtil.createFromString(attribute.getEAttributeType(), (String) newValue);
    Command command = SetCommand.create(editingDomain, item, attribute, value);
    if (command.canExecute())
      editingDomain.getCommandStack().execute(command);
  }

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  @Execute
  void execute() {
    Group group = ContactsFactory.eINSTANCE.createGroup();
    group.setName("New Group");
    Command command = AddCommand.create(contactsManager.getEditingDomain(), contactsManager.getRootGroup(), ContactsPackage.Literals.GROUP__GROUPS, group); 
    if (command != null && command.canExecute())
      contactsManager.getEditingDomain().getCommandStack().execute(command);
  }

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  ContactsManager contactsManager;


  @Execute
  void execute() {
    Contact contact = ContactsFactory.eINSTANCE.createContact();
    Command command = AddCommand.create(contactsManager.getEditingDomain(), contactsManager.getRootGroup(), ContactsPackage.Literals.GROUP__CONTACTS, contact); 
    if (command != null && command.canExecute())
      contactsManager.getEditingDomain().getCommandStack().execute(command);
  }

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