Re: sorting and searching in Struts/tiles

[Jason Lea]

I have included a quick example of doing this by using a list of 
hashmaps.  The hashmap holds the text that may appear in the pulldown.

list = new ArrayList();
for (Iterator i = myObjects.iterator(); i.hasNext();) {
   Map map=new HashMap();
   map.put("firstName","Joe");
   map.put("lastName","Smith");
   map.put("fullName","Joe Smith");
   map.put("someOtherField","blue");  
   list.add(map);
}

to sort the list we use can do this:

   Collections.sort(list, new BeanComparator("lastName"));

(this uses the BeanComparator from here 
http://jakarta.apache.org/commons/beanutils.html)

This will sort ascending by default, so to get decending I can do this 
afterwards...

   Collections.reverse(list);

Dinh Nguyen wrote:

Hi Tim,

In this case, I have to display the sorted list (ascending and 
descending) for names, etc.  How do I do this?  How can I pull the 
objects from the back-end.  
I am thinking to use collections.sort(list, comparator)as you 
mentioned or use sortedset and using arraylist (or hashset) to hold 
objects.
For searching, I am thinking to use hashtable, but have no idea 
what's the next step.  
I use the EJB as back-end and has not implemented it yet. 

If you can give me feedback on this or give me some kinds of ideas, 
then it'll be great. 
Thanks for your help.
Dinh Nguyen  

--- In [EMAIL PROTECTED], "Chen, Gin" <[EMAIL PROTECTED]> wrote:
 

I'm not sure I understand this question but wouldn't you just 
   

implement some
 

comparators?
Then based on the sort option selected you can call something like:
Collections.sort(list, comparator)?
As for the search just have a java module to search thru the 
   

collection.
 

I'm not quite sure how what this question really has to do with 
   

Struts.
 

Unless you use something like the displaytags to display a 
   

sortable list for
 

the names.
-Tim
-----Original Message-----
From: Ruth, Brice [mailto:[EMAIL PROTECTED] 
Sent: Thursday, October 23, 2003 1:26 PM
To: Struts Users Mailing List
Subject: sorting and searching in Struts/tiles

[Forwarded from Dinh Nguyen, his emails aren't reaching the list]

Dinh Nguyen wrote:

Hi,

I am wondering how do you do the sorting and searching in struts.
Let say, when a person views a list of collections (for example, 
   

the
 

list consists of 5 people, each person has first name, last name,
age), there is a drop-down menu on the bottom of the table/page 
   

says
 

that:
1) Sort has two options: a) Ascending b) Descending
2) Search has three options a) Last Name b) First Name c) Age
Since data is not stored in database yet.
so in this case how can I do it using Struts?
Thanks for your help.

DN

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--
Jason Lea


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