[Webtest] How to assign webtest property value to a groovy variable

[paresh gadre]

  
  
My Code Snippet:

storeXPath property: "linkHref", propertyType: "ant", xpath: "//a...@name = 
'viewLive']/@href", default: "EMPTY"
invoke '${linkHref}'
def str = '${linkHref}'
echo 'String value::::'+'${linkHref}'
echo 'variable value::::'+str
echo ‘-----’+str.indexOf(‘?’)


I am getting following Output:
    [java]      [echo] String 
value::::http://nitra.test-dealer.com.websites.dev-gparesh.blr.main.cobaltgroup.com/selenium/?reload=true
    [java]      [echo] variable 
value::::http://nitra.test-dealer.com.websites.dev-gparesh.blr.main.cobaltgroup.com/selenium/?reload=true
    [java]      [echo] ----- -1 


I  want the index of  “?” character from the url  i.e 
http://nitra.test-dealer.com.websites.dev-gparesh.blr.main.cobaltgroup.com/selenium/?reload=true.
To get the index, I m using  indexOf(‘?’) to get the index of “?”. But its 
always giving  -1.

Is the way of assigning of webtest property "${linkHref"} to groovy variable 
"str" is correct? 

Need help to re-solve this issue.

Thanks in Advance.