public void execute() 
    // -------------<SOL id="d8568511-9904-44d2-adb7-1198405a813a:___throw__" />
    // -------------<LOS id="d8568511-9904-44d2-adb7-1198405a813a:___throw__" />
    {
        // ---------<SOL id="d8568511-9904-44d2-adb7-1198405a813a:___body___" />
    	Folder source = from.val();
    	if (source.selected.size() == 0)
        {
        	throw new CommandPreconditionsException("Select item to move!");
        }
        Folder dest = to.val();
        
        if (source.equals(dest))
        {
        	throw new CommandPreconditionsException("Select different folders.");
        }

        for (Document d : source.selected.read()) {
        	if (d instanceof Folder)
        		if (((Folder) d).isParent(dest))
        			throw new CommandPreconditionsException("Destination folder is subfolder!");
        }
        source.move(dest);
        // ---------<LOS id="d8568511-9904-44d2-adb7-1198405a813a:___body___" />
    }