Re: Question about the io taglib
From: Meltsner, Kenneth If you set the system properties: http.proxyHost http.proxyPort (either programmatically, or by using -Dpropname=value when starting Java) it will work with a proxy server that doesn't require authentication. For authentication, you need to add a custom header to the request. I have the code for this somewhere That worked! Thanks for your help. Mike -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
why is there no dbtags getField tag ?
Instead of writing getColumn, is there a more intuitive method that uses the field name instead getColumn ? For example the current method is this sql:statement id=stmt1 conn=conn1 sql:query select * from members /sql:query sql:resultSet id=rset2 sql:getColumn position=1/ sql:getColumn position=2/ /sql:resultSet /sql:statement Why is there not something like this instead sql:statement id=stmt1 conn=conn1 sql:query select * from members /sql:query sql:resultSet id=rset2 sql:getField name=firstname / sql:getField name=lastname / /sql:resultSet /sql:statement Or does something like this exist ? Thank you, Soefara. _ Send and receive Hotmail on your mobile device: http://mobile.msn.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
can output of dbtags query be used to fill javabean properties ?
Sorry I have another question. I have a form that sets the default values of the fields with a javabean like this jsp:useBean id=mybean class=mybean scope=request form First name is input type=text name=firstname value=%=mybean.getFirstname()% Last name is input type=text name=lastname value=%=mybean.getLastname()% /form This fills default field values if the parameters are submitted in the request otherwise it makes the fields blank . But how can I set the values of the bean properties from the SQL result returned from the dbtags query ? For example I would like to loop through the results of a sql:query and set or create a javabean each time. sql:statement id=stmt1 conn=conn1 sql:query select * from members /sql:query %-- loop through the rows and create a bean each time --% jsp:useBean id=resultbean class=mybean sql:resultSet id=rset2 First name is input type=text name=firstname value=%=resultbean.getFirstname()% Last name is input type=text name=lastname value=%=resultbean.getLastname()% /sql:resultSet /sql:statement Is something like this possible ? Thank you, Soefara _ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: c:set and scriptlets
On Mon, 11 Mar 2002, Agrawal, Anuj (Anuj)** CTR ** wrote: In my code i have c:set var=x value=4/ I'd like to be able to access the variable x from within a scriptlet, something like: % x = x++; % and vice versa. Is this even possible? I don't see anything in the docs that refer to such interchangeability. 8( JSTL doesn't particularly encourage this usage, but it's perfectly possible using older, scriptlet-oriented mechanisms like jsp:useBean. Just use a jsp:useBean tag after c:set to declare your scripting variable. -- Shawn Bayern Author, JSP Standard Tag Library http://www.jstlbook.com (coming this spring from Manning Publications) -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: c:set and scriptlets
See my last message about multipart stuff. You can capture this functionality in TEI (TagExtraInfo) Support class to your tag. Then in your tag you can set the value of the variable via a special method which you have to define. !-- Straight off the javadoc public abstract class TagExtraInfo extends java.lang.Object Optional class provided by the tag library author to describe additional translation-time information not described in the TLD. The TagExtraInfo class is mentioned in the Tag Library Descriptor file (TLD). This class can be used: * to indicate that the tag defines scripting variables * to perform translation-time validation of the tag attributes. ... -- -Mark Diggory Shawn Bayern wrote: On Mon, 11 Mar 2002, Agrawal, Anuj (Anuj)** CTR ** wrote: In my code i have c:set var=x value=4/ I'd like to be able to access the variable x from within a scriptlet, something like: % x = x++; % and vice versa. Is this even possible? I don't see anything in the docs that refer to such interchangeability. 8( JSTL doesn't particularly encourage this usage, but it's perfectly possible using older, scriptlet-oriented mechanisms like jsp:useBean. Just use a jsp:useBean tag after c:set to declare your scripting variable. -- Shawn Bayern Author, JSP Standard Tag Library http://www.jstlbook.com (coming this spring from Manning Publications) -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: c:set and scriptlets
I'm sorry, that was on the development list, not the user list Mark R. Diggory wrote: See my last message about multipart stuff. You can capture this functionality in TEI (TagExtraInfo) Support class to your tag. Then in your tag you can set the value of the variable via a special method which you have to define. !-- Straight off the javadoc public abstract class TagExtraInfo extends java.lang.Object Optional class provided by the tag library author to describe additional translation-time information not described in the TLD. The TagExtraInfo class is mentioned in the Tag Library Descriptor file (TLD). This class can be used: * to indicate that the tag defines scripting variables * to perform translation-time validation of the tag attributes. ... -- -Mark Diggory Shawn Bayern wrote: On Mon, 11 Mar 2002, Agrawal, Anuj (Anuj)** CTR ** wrote: In my code i have c:set var=x value=4/ I'd like to be able to access the variable x from within a scriptlet, something like: % x = x++; % and vice versa. Is this even possible? I don't see anything in the docs that refer to such interchangeability. 8( JSTL doesn't particularly encourage this usage, but it's perfectly possible using older, scriptlet-oriented mechanisms like jsp:useBean. Just use a jsp:useBean tag after c:set to declare your scripting variable. -- Shawn Bayern Author, JSP Standard Tag Library http://www.jstlbook.com (coming this spring from Manning Publications) -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: c:set and scriptlets
Anuj was writing about the JSTL tag c:set, though. JSTL de-emphasizes
scripting variables in favor of the expression language it introduces.
Scripting variables are a reasonable mechanism for some applications, but
they inherently depend on scriptlets, which means that they're useful only
if a page author knows something about Java. Scripting variables can also
be confusing many situations. For instance, consider the following code:
%-- Sets a scoped attribute four with the value of 4 --%
c:set var=four value=${2 + 2}/
%-- Declares a scripting variable four to match this scoped var --%
jsp:useBean id=four type=java.lang.Number/
%-- Replaces the scripting variablr four with the value 5 --%
% four = new Integer(5); %
%-- Prints out the value of the scoped variable four --%
c:out value=${four}/
What do you expect the final c:out tag to output? You might think 5
because you replaced the scripting variable 'four' with an Integer object
for the number 5. But the tag actually prints out 4, because changing a
scripting variable doesn't change the scoped variable that it was
originally tied to.
--
Shawn Bayern
Author, JSP Standard Tag Library http://www.jstlbook.com
(coming this spring from Manning Publications)
On Mon, 11 Mar 2002, Mark R. Diggory wrote:
See my last message about multipart stuff. You can capture this
functionality in TEI (TagExtraInfo) Support class to your tag. Then in
your tag you can set the value of the variable via a special method
which you have to define.
!-- Straight off the javadoc
public abstract class TagExtraInfo
extends java.lang.Object
Optional class provided by the tag library author to describe additional
translation-time information not described in the TLD. The TagExtraInfo
class is mentioned in the Tag Library Descriptor file (TLD).
This class can be used:
* to indicate that the tag defines scripting variables
* to perform translation-time validation of the tag attributes.
...
--
-Mark Diggory
Shawn Bayern wrote:
On Mon, 11 Mar 2002, Agrawal, Anuj (Anuj)** CTR ** wrote:
In my code i have c:set var=x value=4/
I'd like to be able to access the variable x from within a scriptlet,
something like:
%
x = x++;
%
and vice versa.
Is this even possible? I don't see anything in the docs that refer to
such interchangeability. 8(
JSTL doesn't particularly encourage this usage, but it's perfectly
possible using older, scriptlet-oriented mechanisms like jsp:useBean.
Just use a jsp:useBean tag after c:set to declare your scripting
variable.
--
Shawn Bayern
Author, JSP Standard Tag Library http://www.jstlbook.com
(coming this spring from Manning Publications)
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RE: c:set and scriptlets
I really didn't want to use scriptlets (per the documentation), but i was
running into situations where the JSTL actions were not (yet) supporting
some things that scriptlets could do.. OR SO I THOUGHT! 8
I've since then found a way around it using JSTL actions alone - so i'm a
little happier now.
I haven't found any detailed documentation on how i put different
programming expressions or what kind of statements i can and cannot place in
things like value= or test=.. but throught trial and error and also this
wonderful mailing list, i'm learning about what's legal and what's illegal.
Thanks.
PS: Shawn - you rule! 8)
Anuj was writing about the JSTL tag c:set, though. JSTL
de-emphasizes
scripting variables in favor of the expression language it introduces.
Scripting variables are a reasonable mechanism for some
applications, but
they inherently depend on scriptlets, which means that
they're useful only
if a page author knows something about Java. Scripting
variables can also
be confusing many situations. For instance, consider the
following code:
%-- Sets a scoped attribute four with the value of 4 --%
c:set var=four value=${2 + 2}/
%-- Declares a scripting variable four to match this
scoped var --%
jsp:useBean id=four type=java.lang.Number/
%-- Replaces the scripting variablr four with the value 5 --%
% four = new Integer(5); %
%-- Prints out the value of the scoped variable four --%
c:out value=${four}/
What do you expect the final c:out tag to output? You
might think 5
because you replaced the scripting variable 'four' with an
Integer object
for the number 5. But the tag actually prints out 4,
because changing a
scripting variable doesn't change the scoped variable that it was
originally tied to.
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Re: 2nd try: Using set to change scope
Ah, I meant to try to answer this, but it slipped through...
I wasn't sure exactly what you meant by change the scope on one of the
attributes on our tags. You can use c:set to override an existing
attribute, and thus to change the scope of a scoped variable:
c:set var=foo scope=session value=${page.foo}/
but I'm not sure if that's what you mean.
You can't make the 'scope' attribute dynamic, which might be another thing
you mean. That is, you can't say scope=${myscope}. This restriction is
designed primarily to aid tool support and translation-time error
checking. If you need to decide on the fly what scope to use, you'll need
to use a c:if or c:choose block. We didn't consider this case very
common, so the somewhat circuitous solution didn't seem to be a major
issue. (Hmm, that's the first I've used the word circuitous to actually
refer to circuit-like logic. I wonder if that counts as a pun or not...)
--
Shawn Bayern
Author, JSP Standard Tag Library http://www.jstlbook.com
(coming this spring from Manning Publications)
On Mon, 11 Mar 2002, Steve Bang wrote:
Can anyone help me on this?
Thanks,
Steve
-Original Message-
From: Steve Bang [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 08, 2002 11:03 AM
To: 'Tag Libraries Users List'
Subject: Using set to change scope
We have a custom tag library that treats all of our tags with
a session scope (by design). Is it possible to use JSTL's
c:set tag to change the scope on one of the attributes on
our tags? Users are requesting the ability to dynamically
change an attribute value on our tags when a page is refreshed,
but so far this is not possible within the tags themselves --
they are only interpreted the first time a page loads. If
so, do we have to modify our tag library to support this?
Steve
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Re: can output of dbtags query be used to fill javabean properties ?
Once again you can use the sql tags available in the Standard tag library.
You can populate a bean like this:
sql:update var=newTable
create table mytable (
nameid int primary key,
name varchar(80)
)
/sql:update
sql:query var=resultSet
SELECT * FROM mytable
/sql:query
c:forEach var=row items=${resultSet.rowsByIndex}
jsp:useBean id=mybean class=mybean scope=request/
jsp:setProperty name=mybean property=nameId
value=%=row[0]%/
jsp:setProperty name=mybean property=name value=%=row[1]%/
/c:forEach
Justy
- Original Message -
From: Soefara Redzuan [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, March 11, 2002 6:06 AM
Subject: can output of dbtags query be used to fill javabean properties ?
Sorry I have another question. I have a form that sets the default values
of
the fields with a javabean like this
jsp:useBean id=mybean class=mybean scope=request
form
First name is input type=text name=firstname
value=%=mybean.getFirstname()%
Last name is input type=text name=lastname
value=%=mybean.getLastname()%
/form
This fills default field values if the parameters are submitted in the
request otherwise it makes the fields blank .
But how can I set the values of the bean properties from the SQL result
returned from the dbtags query ?
For example I would like to loop through the results of a sql:query and
set
or create a javabean each time.
sql:statement id=stmt1 conn=conn1
sql:query
select * from members
/sql:query
%-- loop through the rows and create a bean each time --%
jsp:useBean id=resultbean class=mybean
sql:resultSet id=rset2
First name is input type=text name=firstname
value=%=resultbean.getFirstname()%
Last name is input type=text name=lastname
value=%=resultbean.getLastname()%
/sql:resultSet
/sql:statement
Is something like this possible ?
Thank you, Soefara
_
MSN Photos is the easiest way to share and print your photos:
http://photos.msn.com/support/worldwide.aspx
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Re: can output of dbtags query be used to fill javabean properties ?
Thank you so much Justyna. I can understand it but in a paralell topic
about JSTL it is said that the reason for using tags is to make it easier
for web page designers. However I don't know any designers who would not be
intimidated by this code. It looks like tags are still putting a lot of code
into the page.
c:forEach var=row items=${resultSet.rowsByIndex}
jsp:useBean id=mybean class=mybean scope=request/
jsp:setProperty name=mybean property=nameId
value=%=row[0]%/
jsp:setProperty name=mybean property=name
value=%=row[1]%/
/c:forEach
Thank you again, Soefara.
- Original Message -
From: Soefara Redzuan [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, March 11, 2002 6:06 AM
Subject: can output of dbtags query be used to fill javabean properties ?
Sorry I have another question. I have a form that sets the default
values
of
the fields with a javabean like this
jsp:useBean id=mybean class=mybean scope=request
form
First name is input type=text name=firstname
value=%=mybean.getFirstname()%
Last name is input type=text name=lastname
value=%=mybean.getLastname()%
/form
This fills default field values if the parameters are submitted in the
request otherwise it makes the fields blank .
But how can I set the values of the bean properties from the SQL result
returned from the dbtags query ?
For example I would like to loop through the results of a sql:query and
set
or create a javabean each time.
sql:statement id=stmt1 conn=conn1
sql:query
select * from members
/sql:query
%-- loop through the rows and create a bean each time --%
jsp:useBean id=resultbean class=mybean
sql:resultSet id=rset2
First name is input type=text name=firstname
value=%=resultbean.getFirstname()%
Last name is input type=text name=lastname
value=%=resultbean.getLastname()%
/sql:resultSet
/sql:statement
Is something like this possible ?
Thank you, Soefara
_
MSN Photos is the easiest way to share and print your photos:
http://photos.msn.com/support/worldwide.aspx
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RE: can output of dbtags query be used to fill javabean properties ?
Subject: Re: can output of dbtags query be used to fill javabean
properties ?
This is a similar question i had wanted to ask.
Once again you can use the sql tags available in the Standard
You can populate a bean like this:
c:forEach var=row items=${resultSet.rowsByIndex}
jsp:useBean id=mybean class=mybean scope=request/
jsp:setProperty name=mybean property=nameId
value=%=row[0]%/
jsp:setProperty name=mybean property=name
value=%=row[1]%/
/c:forEach
This violates one of the core suggestions made by the documentation (and
Shawn) - we should try not to mix scriptlets with the JSTL tags. I'd like
to stick to that rule. So the question is - how do we achieve the above
without using scriptlets?
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