private boolean checkPermission()

in jspwiki-main/src/main/java/org/apache/wiki/tags/PermissionTag.java [105:145]
35 lines of code
18 McCabe index (conditional complexity)

    private boolean checkPermission( final String permission ) {
        final Session session          = m_wikiContext.getWikiSession();
        final Page page                = m_wikiContext.getPage();
        final AuthorizationManager mgr = m_wikiContext.getEngine().getManager( AuthorizationManager.class );
        boolean gotPermission          = false;
        
        if ( CREATE_GROUPS.equals( permission ) || CREATE_PAGES.equals( permission ) || EDIT_PREFERENCES.equals( permission ) || EDIT_PROFILE.equals( permission ) || LOGIN.equals( permission ) ) {
            gotPermission = mgr.checkPermission( session, new WikiPermission( page.getWiki(), permission ) );
        } else if ( VIEW_GROUP.equals( permission ) || EDIT_GROUP.equals( permission ) || DELETE_GROUP.equals( permission ) )  {
            final Command command = m_wikiContext.getCommand();
            gotPermission = false;
            if ( command instanceof GroupCommand && command.getTarget() != null ) {
                final GroupPrincipal group = (GroupPrincipal)command.getTarget();
                final String groupName = group.getName();
                String action = "view";
                if( EDIT_GROUP.equals( permission ) ) {
                    action = "edit";
                } else if ( DELETE_GROUP.equals( permission ) ) {
                    action = "delete";
                }
                gotPermission = mgr.checkPermission( session, new GroupPermission( groupName, action ) );
            }
        } else if ( ALL_PERMISSION.equals( permission ) ) {
            gotPermission = mgr.checkPermission( session, new AllPermission( m_wikiContext.getEngine().getApplicationName() ) );
        } else if ( page != null ) {
            //
            //  Edit tag also checks that we're not trying to edit an old version: they cannot be edited.
            //
            if( EDIT.equals(permission) ) {
                final Page latest = m_wikiContext.getEngine().getManager( PageManager.class ).getPage( page.getName() );
                if( page.getVersion() != WikiProvider.LATEST_VERSION && latest.getVersion() != page.getVersion() ) {
                    return false;
                }
            }

            final Permission p = PermissionFactory.getPagePermission( page, permission );
            gotPermission = mgr.checkPermission( session, p );
        }
        
        return gotPermission;
    }