public static String resolveWindowContextId()

in jee-modules/jsf-module/impl/src/main/java/org/apache/myfaces/extensions/cdi/jsf/impl/util/ConversationUtils.java [139:202]
47 lines of code
17 McCabe index (conditional complexity)

    public static String resolveWindowContextId(WindowHandler windowHandler,
                                                boolean requestParameterSupported,
                                                boolean allowUnknownWindowIds)
    {
        FacesContext facesContext = FacesContext.getCurrentInstance();

        ExternalContext externalContext = facesContext.getExternalContext();
        Map<String, String> requestParameterMap = externalContext.getRequestParameterMap();
        Map<String, Object> requestMap = externalContext.getRequestMap();

        //try to find id in request map
        String id = tryToFindWindowIdInRequestMap(requestMap);

        if((id == null || id.length() == 0) && windowHandler != null)
        {
            id = windowHandler.restoreWindowId(facesContext.getExternalContext());
        }

        if(id == null || id.length() == 0)
        {
            //depending on the config we have to check it in case of server-side window-ids +a forced id for the request
            id = tryToRestoreWindowIdFromRequestParameterMap(requestParameterSupported, requestParameterMap);
        }

        if(id != null && id.length() > 0 &&
           (!cacheWindowId(externalContext, id, allowUnknownWindowIds) ||
            WindowContextManager.AUTOMATED_ENTRY_POINT_PARAMETER_KEY.equals(id)))
        {
            id = null;
        }

        if (id != null && id.length() > 0)
        {
            return id;
        }

        if("".equals(id))
        {
            //return null to force a new window id - e.g. in case of #{currentWindow.useNewId}
            return null;
        }

        //try to restore id from component
        WindowContextIdHolderComponent windowContextIdHolder = getWindowContextIdHolderComponent(facesContext);

        if (windowContextIdHolder != null)
        {
            //TODO cache for request
            id = windowContextIdHolder.getWindowContextId();

            if(id != null && !cacheWindowId(externalContext, id, allowUnknownWindowIds))
            {
                id = null;
            }

            if(id != null)
            {
                requestMap.put(WindowContextManager.WINDOW_CONTEXT_ID_PARAMETER_KEY,
                               windowContextIdHolder.getWindowContextId());
            }
        }

        return id;
    }