Get value from map which is a list/array

Question

I'm getting the parameters from a POST request (x-www-form-urlencoded) formatted as below:

def postreq = exc?.request
def params = postreq?.getPostParams()
println params
Console:
[request:[foo], client:[abcd], id:[qwert]]

How can I use request as key and get its value? Note that there is a extra pair of brackets and the strings are not quoted. I've tried @injecteer suggestions but all I got is caused by NullPointerException: Cannot get property 'request' on null object

I could print all key:value pairs by doing

params.collect{println it.key.toString() + " " + it.value.toString()}
Console:
request [foo]
client [abcd]
id [qwert]

but couldn't get a specific one.

• Ryuzaki L: what is your expected output ?
• ou_ryperd: Are the values lists, why the square brackets ? Should have quotes, they're strings: ['request':'[12345]', 'client':'[abcd]', 'id':'[qwert]']
• cfrick: You are stating that something is not working, but you fail to produce what you have tried. So assuming, that there might be more to it, could you please provide a MCVE to show the problem and how the result is not of your liking?
• Adami: @Deadpool foo
• Adami: @ou_ryperd I don't know why, it's how I'm getting the POST parameters...

Answer 1

You can use

def map = [request:[12345], client:['abcd'], id:['qwert']]
assert map.request == [12345] // dot-notation
assert map[ 'request' ] == [12345] // subscript operator
def name = 'request'
assert map."${name}" == [12345] // Groovy's meta-magical String-interpolated dot-notation
assert map.get( 'request' ) == [12345] // casual java Map's method
assert map.getAt( 'request' ) == [12345] // Groovy's extension of get()

• Adami: All I got is caused by NullPointerException: Cannot get property 'request' on null object. I also updated the post with more info. Thanks!
• injecteer: My script runs successfully on groovyconsole.appspot.com . There must be something wrong with the way you are getting the data

Answer 2

I only had to convert the variable to string then I could print it:

def params = postreq?.getPostParams()
def reqobj = params?.request.toString()
println reqobj