Ted,
Maybe I am mistaken, but I think he wants to add the parameters in
the perform method of his Action. So in the case the html:link tag
might not work.
For cases like these (and I am open to better suggestions) I have
extended the Action Forward class to make a ParameterActionForward
class. Here is the code:
########### ParameterActionForward.java ##########
import org.apache.struts.action.ActionForward;
import java.util.HashMap;
import java.util.Iterator;
/**
* Implementation of <strong>ActionForward</strong> that allows
requestParameters
* added on to the path.
*
* @author Bill Clinton
* @version $Id: ParameterActionForward.java,v 1.1 2001/08/17 15:24:42
bclinton Exp $
*/
public final class ParameterActionForward extends ActionForward {
private HashMap parameters = new HashMap();
private String path;
private static final String questionMark = "?";
private static final String ampersand = "&";
private static final String equals = "=";
public ParameterActionForward(ActionForward forward) {
setName(forward.getName());
setPath(forward.getPath());
setRedirect(forward.getRedirect());
}
public void addParameter(String paramName, Object paramValue) {
addParameter(paramName,paramValue.toString());
}
public void addParameter(String paramName, String paramValue) {
parameters.put(paramName,paramValue);
}
public void setPath(String path) {
this.path=path;
}
public String getPath() {
StringBuffer sb = new StringBuffer();
sb.append(path);
boolean firstTimeThrough = true;
if (parameters!=null && !parameters.isEmpty()) {
sb.append(questionMark);
Iterator it = parameters.keySet().iterator();
while (it.hasNext()) {
String paramName = (String)it.next();
String paramValue = (String)parameters.get(paramName);
if (firstTimeThrough) {
firstTimeThrough=false;
} else {
sb.append(ampersand);
}
sb.append(paramName);
sb.append(equals);
sb.append(paramValue);
}
}
return sb.toString();
}
}
########### End ParameterActionForward.java ##########
This is an example of using the class to add two parameters to a forward:
ParameterActionForward forward = new ParameterActionForward(
mapping.findForward("success"));
forward.addParameter("id",String.valueOf(questionForm.getQuestionId()));
forward.addParameter("modified","true");
return forward;
I hope this is useful to you Krishna. And I welcome any (constructive)
peer criticism. In fact, as I was pasteing, I noticed a potential bug.
I don't think this would work on forwards that didn't have redirect set
to true, so play with it, test it, and modify it before you use it. I
am using it for something specific and it works for me.
Bill
Ted Husted wrote:
> Then you would use a html:link tag with the actionForm as the source.
>
> http://jakarta.apache.org/struts/struts-html.html#link
>
> Bhamidi Krishna wrote:
>
>> Hi Ted,
>>
>> thankyou for the mail,
>>
>> but what if mode and value (either one or both) keep getting generated
>> dynamically dependent on the actionForm ?
>>
>> Krishna
>>
>>
>>> Just put it in as a Global Forward, something like this
>>>
>>> <forward name="itemFindScript"
>>> path="/do/item/Search?column=script"/>
>>>
>>> or in your case
>>>
>>> <forward name="something"
>>> path="/do/Something?mode=21"/>
>>>
>>> or, using extension mapping
>>>
>>> <forward name="something"
>>> path="/Something.do?mode=21"/>
>>>
>>>
>>> You can also refer to Global Forwards in the link tag, and Struts will
>>> append any other parameters you supply (paramID, paramProperty).
>>>
>>> Bhamidi Krishna wrote:
>>>
>>>> Hi,
>>>>
>>>> I have an elementary question. I want to encode the URL of my jsp page
>>>
>>> that
>>>
>>>> I call using findForward() say something like a mode parameter.
>>>>
>>>> So my jsp url will look like:
>>>> http://localhost:8080/someURL/doSomething?mode=21
>>>>
>>>> How can I do that?
>>>>
>>>> Krishna
>>>>
>>>> _________________________________________________________________
>>>> Get your FREE download of MSN Explorer at
>>>
>>> http://explorer.msn.com/intl.asp
>>>
>>> -- Ted Husted, Husted dot Com, Fairport NY USA.
>>> -- Custom Software ~ Technical Services.
>>> -- Tel +1 716 737-3463
>>> -- http://www.husted.com/about/struts/
>>
>> _________________________________________________________________
>> Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp
>
>
> -- Ted Husted, Husted dot Com, Fairport NY USA.
> -- Custom Software ~ Technical Services.
> -- Tel +1 716 737-3463
> -- http://www.husted.com/about/struts/
