Examples of org.eclipse.core.commands.Command

org.eclipse.core.commands.Command

A command is an abstract representation for some semantic behaviour. It is not the actual implementation of this behaviour, nor is it the visual appearance of this behaviour in the user interface. Instead, it is a bridge between the two.

The concept of a command is based on the command design pattern. The notable difference is how the command delegates responsibility for execution. Rather than allowing concrete subclasses, it uses a handler mechanism (see the handlers extension point). This provides another level of indirection.

A command will exist in two states: defined and undefined. A command is defined if it is declared in the XML of a resolved plug-in. If the plug-in is unloaded or the command is simply not declared, then it is undefined. Trying to reference an undefined command will succeed, but trying to access any of its functionality will fail with a NotDefinedException. If you need to know when a command changes from defined to undefined (or vice versa), then attach a command listener.

Commands are mutable and will change as their definition changes.
@since 3.1

        {
          DestecsUIPlugin.log("Failed to upgrade project in action", e);
        }


        ICommandService cmdService = (ICommandService) HandlerUtil.getActiveSite(event).getService(ICommandService.class);
        Command upgradeCommand = cmdService.getCommand(IDestecsUiConstants.UPGRADE_LIBRARY_COMMANDID);
        if (upgradeCommand.isDefined())
        {
          try
          {
            upgradeCommand.executeWithChecks(event);
          } catch (Exception e)
          {
            DestecsUIPlugin.log("Could not execute library upgrade command", e);
          }
        }

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  }


  @Override
  protected ICommandData createDataNode(
      LocalDate date, WorkspaceStorage ws, CommandEventType type) throws Exception {
    Command cmd = commandService().getCommand(type.getCommandId());
    return new CommandData(date, ws, cmd, type.getCount());
  }

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  }


  private boolean isLinkedWithEditor() {
    ICommandService service = (ICommandService) PlatformUI.getWorkbench()
        .getService(ICommandService.class);
    Command command = service.getCommand("org.eclipse.wst.xml.ui.cmnd.contentmodel.sych"); //$NON-NLS-1$
    State state = command.getState("org.eclipse.ui.commands.toggleState"); //$NON-NLS-1$


    return ((Boolean) state.getValue()).booleanValue();
  }

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  }
  
  @Override
  protected boolean isLeafMatch(Viewer viewer, Object element) {
    if (element instanceof Command) {
      Command cmd = (Command) element;
      try {
        return (wordMatches(cmd.getName())) || (wordMatches(cmd.getId()));
      } catch (NotDefinedException e) {
        return wordMatches(cmd.getId());
      }
    }
    return false;
  }

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  @Override
  public int compare(Viewer viewer, Object e1, Object e2) {
    if ((e1 instanceof Command) && (e2 instanceof Command)) {
      
      Command cmd1 = (Command) e1;
      Command cmd2 = (Command) e2;
      
      if (!cmd1.isDefined()) {
        return 1;
      }
      
      if (!cmd2.isDefined()) {
        return -1;
      }
      
      try {
        return cmd1.getName().compareTo(cmd2.getName());
      } catch (NotDefinedException e) {
        return cmd1.getId().compareTo(cmd2.getId());
      }
      
    } else if ((e1 instanceof Category) && (e2 instanceof Category)) {
      
      Category cat1 = (Category) e1;

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  protected String getMessage(Object treeNode) {
    if (treeNode instanceof Category) {
      return ((Category) treeNode).getId();
      
    } else if (treeNode instanceof Command) {
      Command cmd = (Command) treeNode;
      try {
        return cmd.getId() + "    " + cmd.getDescription();
      } catch (NotDefinedException e) {
        return cmd.getId();
      }
    }
    return super.getMessage(treeNode);
  }

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  @Override
  public void shouldCorrectlyBuildMultiplePaths() {
    WorkspaceStorage ws2 = new WorkspaceStorage(new Path(".b"), null);
    LocalDate date2 = date.minusDays(2);
    Command command2 = newCommand("abc");
    int count2 = count + 10;


    ICategory[] categories = {Category.WORKSPACE, Category.COMMAND};
    List<TreePath> expected = asList(
        newPath(ws, command, count),

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                    .getData(KEY_PERSPECTIVE);


            ICommandService commandService = (ICommandService) PlatformUI.getWorkbench()
                    .getService(ICommandService.class);


            Command command = commandService.getCommand("org.eclipse.ui.perspectives.showPerspective");




            Map parameters = new HashMap();
            parameters.put("org.eclipse.ui.perspectives.showPerspective.perspectiveId", perspectiveDescriptor.getId());
            ParameterizedCommand parameterizedCommand = ParameterizedCommand.generateCommand(command, parameters);

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        ATT_COMMAND_ID, warningsToLog, message, id);
    if (commandId == null) {
      return null;
    }


    final Command command = commandService.getCommand(commandId);
    final ParameterizedCommand parameterizedCommand = readParameters(
        configurationElement, warningsToLog, command);


    return parameterizedCommand;
  }

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        warningsToLog, message, id);
    if (commandId == null) {
      return null;
    }


    final Command command = commandService.getCommand(commandId);
    final ParameterizedCommand parameterizedCommand = readParameters(
        memento, warningsToLog, command);


    return parameterizedCommand;
  }

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