D'oh was a simple fix, use service:
@InjectObject("service:tapestry.ognl.ExpressionEvaluator")
On Wednesday, August 16, 2006, at 07:54AM, Ryan Cuprak <[EMAIL PROTECTED]>
wrote:
>
> Thanks,
> That is much simpler!
> For the ExpressionTableColumn I need a ExpressionEvaluator as the last
> parameter. I think it is a tapestry service (still digging through the
> binding files), thought this would work:
> @InjectObject("infrastructure:tapestry.ognl.ExpressionEvaluator")
> public abstract ExpressionEvaluator getExpressionEvaluator();
> (also tried engine-service)
>
> However I get a nice exception that it can't find the service etc.
>
> -Ryan
>
>On Wednesday, August 16, 2006, at 07:10AM, Robert Zeigler <[EMAIL PROTECTED]>
>wrote:
>
>>If you want, you don't even have to implement ITableColumnModel.
>>just do something like:
>>.html:
>><table jwcid="@contrib:Table" source="ognl:theSource"
>>columns="ognl:columnList"/>
>>
>>.java:
>>
>>public List getColumnList() {
>> List ret = new ArrayList();
>> String columnId="callPointH";
>> String columnHeader="Call Point H";
>> //not that the root of your ognl expression is the current row obj.
>> String ognlExpression = "callPoinH";
>> boolean sortable=true;
>> ret.add(new
>>ExpressionTableColumn(columnId,columnHeeader,ognlExpression,sortable);
>> return ret;
>>}
>>
>>Ryan Cuprak wrote:
>>> Hello,
>>> I am working creating a table for which the number of columns is dynamic
>>> (user can control which columns they want displayed). What is the proper
>>> approach for implementing the behavior?
>>>
>>> Thus far I created an implementation of ITableColumnModel which then
>>> returns the custom set of columns. I initially returned SimpleTableColumn
>>> instances but was getting a 'Unable to read OGNL expression '<parsed OGNL
>>> expression>' of [EMAIL PROTECTED]/image/bands.tableColumns]:
>>> tableColumnRenderer' exception (src below). After getting this exception I
>>> thought my approach might be wrong. Looking over the code I was a little
>>> puzzled on how my column would extract the values from the model etc.
>>> Looking through the contrib:table source I chanced upon
>>> 'ExpressionTableColumn'. There are no java docs so I am not quiet sure how
>>> it is supposed to be used. From the title I 'think' this would take ognl
>>> expressions and retrieve the values from my data model? However, I am not
>>> quiet sure how to contruct an instance - where/what do I use for an
>>> ExpressionEvaluator?
>>>
>>> Page spec:
>>> <component id="bands" type="Contrib:Table">
>>> <binding name="source" value="tableModel"/>
>>> <binding name="columns" value="ognl:tableColumnModel"/>
>>> <binding name="rowsClass" value="beans.evenOdd.next"/>
>>> <binding name="columnsClass" value="literal:title"/>
>>> </component>
>>>
>>> My TableColumnModel (only one field, was trying to get it working first..):
>>> public class BandSummaryColumnModel implements ITableColumnModel {
>>>
>>> private static final Logger logger =
>>> Logger.getLogger(BandSummaryColumnModel.class);
>>>
>>> private Map<String, ITableColumn> _columns;
>>>
>>> public BandSummaryColumnModel() {
>>> if(logger.isDebugEnabled()) logger.debug("Instantiating
>>> BandSummaryColumnModel");
>>> _columns = new HashMap<String,ITableColumn>();
>>> _columns.put("callPointH",new
>>> SimpleTableColumn("callPointH","callPointH",true));
>>> }
>>>
>>> public int getColumnCount() {
>>> if(logger.isDebugEnabled()) logger.debug("Column count: " +
>>> _columns.size());
>>> return _columns.size();
>>> }
>>>
>>> public ITableColumn getColumn(String string) {
>>> if(logger.isDebugEnabled()) logger.debug("Column requested: " +
>>> string);
>>> return _columns.get(string);
>>> }
>>>
>>> public Iterator getColumns() {
>>> if(logger.isDebugEnabled()) logger.debug("Column iterator
>>> requested");
>>> return _columns.entrySet().iterator();
>>> }
>>> }
>>>
>>> Thanks!
>>> Ryan
>>>
>>>
>>>
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