If you knew the underlying data type associated with each of the
((DynaProperty)col).getName() calls in your example then you could
create the input type appropriate to that data type. So, you would also
need to expose the underlying datatypes to the JSP so that it could
conditionally create the appropriate input type for each column. Some
issues with this:
* Should the presentation layer really *know* about the
underlying datatypes, Your example passes a disconnected
recordset to the presentation layer so the JSP would
need to know something about how that data is stored in
the underlying RDBMS.
* The conditional logic in the presentation tier might
get quite messy - in terms of psuedo code it might
look something like this: if type is boolean then
create radio buttons else if type is string then
create text input else if etc etc
But if this is what you _have_ to do then you could try this:
* Get the metadata from the underlying resultset and
make this available to your JSP alongside the "rowSet"
e.g. request.setAttribute("rowSetColumns", rs.getMetaData());
Then either:
* Write a custom tag which encapsulates the logic required
to interrogate the metadata and creates the appropriate
control type
OR
* Use JSTL conditional tags or Struts logic tags to apply
this logic in-place within the JSP.
-----Original Message-----
From: Javier Santos Martin-Moreno
[mailto:[EMAIL PROTECTED]
Sent: 08 June 2005 14:27
To: user@struts.apache.org
Subject: help needed with RowSetDynaClass
Hello all,
I am writing a jsp that retrieves a row of a table in my database and
allows the user to modify the fields using a form. For example, if I
have
the following table in my database:
NAME GENDER
John Male
Ann Female
and the following code in my action class
...
RowSetDynaClass rowSet = dao.getUserData("John");
request.setAttribute("rowSet", rowSet);
...
I would like to display in my jsp a form with a text field containing
"John" and a two radio buttons labelled "male" (selected) and "female",
so
that these values can be modified, and a submit button to update the
database.
This is the piece of code of my jsp displaying the fields of the form:
<logic:iterate id="row" name="rowSet" property="rows">
<logic:iterate id="col" name="cols">
<tr>
<td><bean:write name="col" property="name" /></td>
<td><html:text property="<%=((DynaProperty)col).getName()%>"
size="30"
value="<%=((DynaBean)row).get(((DynaProperty)col).getName()).toString()%
>"
/></td>
</tr>
</logic:iterate>
</logic:iterate>
However, this way all the fields must be the same type (text in this
case)
and have the same attributes (i.e. same size). I would like to know if
there is any method to be able to choose the type of input field (text,
select, checkbox, radio) or the attributes (size, maxlength for text)
for
each field of the database.
Any suggestions?
Thanks in advance,
Javier
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