protected ITableColumnModel getTableColumnModel()

in tapestry-contrib/src/org/apache/tapestry/contrib/table/components/TableView.java [269:327]
46 lines of code
11 McCabe index (conditional complexity)

    protected ITableColumnModel getTableColumnModel()
    {
        Object objColumns = getColumns();

        if (objColumns == null)
            return null;

        if (objColumns instanceof ITableColumnModel)
        {
            return (ITableColumnModel) objColumns;
        }

        if (objColumns instanceof Iterator)
        {
            // convert to List
            Iterator objColumnsIterator = (Iterator) objColumns;
            List arrColumnsList = new ArrayList();
            CollectionUtils.addAll(arrColumnsList, objColumnsIterator);
            objColumns = arrColumnsList;
        }

        if (objColumns instanceof List)
        {
            // validate that the list contains only ITableColumn instances
            List arrColumnsList = (List) objColumns;
            int nColumnsNumber = arrColumnsList.size();
            for (int i = 0; i < nColumnsNumber; i++)
            {
                if (!(arrColumnsList.get(i) instanceof ITableColumn))
                    throw new ApplicationRuntimeException(
                        TableUtils.format("columns-only-please", getExtendedId()));
            }
            //objColumns = arrColumnsList.toArray(new ITableColumn[nColumnsNumber]);
            return new SimpleTableColumnModel(arrColumnsList);
        }

        if (objColumns instanceof ITableColumn[])
        {
            return new SimpleTableColumnModel((ITableColumn[]) objColumns);
        }

        if (objColumns instanceof String)
        {
            String strColumns = (String) objColumns;
            if (getColumnsBinding().isInvariant())
            {
                // if the binding is invariant, create the columns only once
                if (m_objColumnModel == null)
                    m_objColumnModel = generateTableColumnModel(strColumns);
                return m_objColumnModel;
            }

            // if the binding is not invariant, create them every time
            return generateTableColumnModel(strColumns);
        }

        throw new ApplicationRuntimeException(
            TableUtils.format("invalid-table-columns", getExtendedId(), objColumns.getClass()));
    }