• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

struts2 tag

 
Ranch Hand
Posts: 80
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
What is the use of label="%{ example}" in defining struts2 tag when we can use this directly label="example" with the help of OGNL?
 
Sheriff
Posts: 9707
43
Android Google Web Toolkit Hibernate IntelliJ IDE Spring Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
The %{} syntax is used for properties which accept string, but you want to dynamically assign the value of a field to that property. Let's say the name property of textfield, it takes a string. But suppose I want the name of the textfield to be decided upon the name of the category user is browsing (which is under an attribute cat), then I can do this



I hope this makes sense...
 
Author
Posts: 12617
IntelliJ IDE Ruby
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Your example uses the wrong character, and in fact won't work after ~S2.0.9ish when we started disallowing JSP EL in the S2 tags due to a potential security issue.

The "%{}" syntax is the OGNL escape sequence: for most attributes it forces evaluation of the contents as an OGNL expression.
 
Ankit Garg
Sheriff
Posts: 9707
43
Android Google Web Toolkit Hibernate IntelliJ IDE Spring Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

David Newton wrote:Your example uses the wrong character



I typed that in a hurry. This would be the correct example

 
Greenhorn
Posts: 19
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Is there an expression syntax to support invoking getCat("aaa") in this case...something like %{cat['aaa']}

Or is it NOT passible in OGNL to indicate parameters to pass?

Thanks,
J
 
David Newton
Author
Posts: 12617
IntelliJ IDE Ruby
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Please start new threads for new questions.

OGNL allows arbitrary method invocation with parameters.
 
It is no measure of health to be well adjusted to a profoundly sick society. -Krishnamurti Tiny ad:
a bit of art, as a gift, the permaculture playing cards
https://gardener-gift.com
reply
    Bookmark Topic Watch Topic
  • New Topic