public void syncOptions()

in empire-db-jsf2/src/main/java/org/apache/empire/jsf2/controls/SelectInputControl.java [285:384]
81 lines of code
26 McCabe index (conditional complexity)

    public void syncOptions(UISelectOne input, TextResolver textResolver, InputInfo ii)
    {
        // get the options
        Options options = ii.getOptions();
        if (options==null)
        {   // invalid options
            if (ii.getColumn()!=null)
                log.warn("No options given for column {}", ii.getColumn().getName());
            else
                log.warn("No options given for select tag {}", input.getClientId());
            options = new Options();
        }
        
        // check grouping
        OptionGroupResolver optionGroupResolver = options.getOptionGroupResolver();
        if (optionGroupResolver!=null)
        {   // not (yet) supported
            log.debug("SyncOptions is not supported for grouped SelectItems for column {}", ii.getColumn().getName());
            return;
        }
        
        // list and type
        Class<?> exprType = (Class<?>)input.getAttributes().get(SelectInputControl.VALUE_EXPRESSION_TYPE);
        List<SelectItem> selectItemList = getSelectItemList(input);

        // prepare
        Object currentValue = ii.getValue(true);
        boolean hasEmpty = isEmptyEntryRequired(input, options, ii, currentValue);
        // boolean isInsideUIData = ii.isInsideUIData();
        // Compare child-items with options
        Iterator<OptionEntry> ioe = options.iterator();
        OptionEntry oe = (ioe.hasNext() ? ioe.next() : null);
        
        // sync
        Iterator<SelectItem> ico = selectItemList.iterator();
        int lastIndex = 0;
        boolean emptyPresent = false;
        while (ico.hasNext())
        {
            lastIndex++;
            SelectItem si = ico.next();
            Object ov = si.getValue();
            // check empty
            if (ObjectUtils.isEmpty(ov) && hasEmpty)
            {   emptyPresent = true;
                continue;
            }
            // skip inactive
            while (oe != null && !oe.isActive())
            { // check for current
                if (ObjectUtils.compareEqual(oe.getValue(), currentValue))
                    break;
                // next oe
                oe = (ioe.hasNext() ? ioe.next() : null);
            }
            if (oe == null)
            { // remove obsolete items
                lastIndex--;
                for (int index = selectItemList.size() - 1; index >= lastIndex; index--)
                    selectItemList.remove(index);
                // done
                return;
            }
            if (ObjectUtils.compareEqual(ov, oe.getValue()))
            {   // update label and continue
                setItemLabel(si, textResolver, oe);
                oe = (ioe.hasNext() ? ioe.next() : null);
                continue;
            }
            // Not equal - do a full reload
            selectItemList.clear();
            if (hasEmpty)
            {   // add empty entry
                addSelectItem(selectItemList, textResolver, new OptionEntry("", getNullText(ii)), exprType);
            }
            for (OptionEntry opt : options)
            { // Option entries
                if (opt.isActive() || ObjectUtils.compareEqual(opt.getValue(), currentValue))
                { // add active or current item
                    addSelectItem(selectItemList, textResolver, opt, exprType);
                }
            }
            // done
            return;
        }
        // check empty entry
        if (hasEmpty && !emptyPresent)
        { // add missing empty entry
            addSelectItem(selectItemList, textResolver, new OptionEntry("", getNullText(ii)), exprType, 0);
        }
        // Are there any items left?
        while (oe != null)
        { // add missing item
            if (oe.isActive() || ObjectUtils.compareEqual(oe.getValue(), currentValue))
            { // add item
                addSelectItem(selectItemList, textResolver, oe, exprType);
            }
            oe = (ioe.hasNext() ? ioe.next() : null);
        }
    }