Set array to variable in groovy

Question

New to groovy and not a java lover. In my jenkinsfile, I'm having an issue with doing what I think would be simple.

SURL = new String[3]
for (int i = 0; i < 3; i++)
{ 
   url="value"
   SURL[i]="${url}"
}

Seems like in this simple example that SURL[0] through SURL[2] would be set to "value". I'm getting the error:

java.lang.ArrayStoreException: org.codehaus.groovy.runtime.GStringImpl

Any help is appreciated. Thx!

Jenkins pipeline is not really a plain groovy- The error you get is related to pipeline behavior — Jayan
– Jayan, Commented May 26, 2017 at 4:00
as @doelleri said it you are trying to assing GString to a String variable while in fact you dont need to use GString according to your code. — dsharew
– dsharew, Commented May 26, 2017 at 9:14

doelleri · Accepted Answer · 2017-05-26 03:32:57Z

3

This seems like a pretty contrived example, I'm not sure what you're really trying to do.

If url is already a String why not add it directly to SURL? Putting it in "${}" gives you a GStringinstead.

It's not very Groovy to use a statically typed String array, just use a list.

def SURL = []
3.times {
    SURL << url
}

This example uses the overloaded << operator to append to the list.

answered May 26, 2017 at 3:32

doelleri

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Comments

Japster24 · Accepted Answer · 2017-05-26 02:57:36Z

2

Ended up setting it as a string like this:

SURL[i]="${url}" as String

Still unsure why it's functioning this way. Maybe thinking it's an object?

answered May 26, 2017 at 2:57

Japster24

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injecteer · Accepted Answer · 2017-05-26 13:29:26Z

2

If you want to make it right, consider to define the array type explicitly. Instead of

def SURL = new String[3]
SURL[ 0 ] = "-- $a" // << here comes ArrayStoreException: org.codehaus.groovy.runtime.GStringImpl

do

String[] SURL = new String[3]
SURL[ 0 ] = "-- $a"

then it runs smoothly and groovy can properly outbox the GString value to String.

answered May 26, 2017 at 13:29

injecteer

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