Splitting a string using a delimiter in Groovy and avoiding IndexOutOfBoundsException - jenkins

Question

I want to split an input parameter inputDetails to unit level. I'm using tokenize for doing this. Here is my code:
Groovy Code:
def inputDetails = "1234-a0-12;1111-b0-34";
def cDesc = inputDetails.tokenize(";");
for (int i=0; i<cDesc.size(); ++i)
{
def cVer = cDesc.get(i);
def cNum = cVer.tokenize("-");
def a = cNum.get(0);
def b = cNum.get(1);
def c = cNum.get(2);
println (" DEBUG : Input details are, ${a} : ${b} : ${c} \n");
}
Output:
DEBUG : Input details are, 1234 : a0 : 12
DEBUG : Input details are, 1111 : b0 : 34
This output is correct and expected. But if I change the first line of Groovy code to following:
def inputDetails = "1234-a0-12;1111-b0";
I get following error message:
java.lang.IndexOutOfBoundsException: Index: 2, Size: 2
at java_util_List$get$6.call(Unknown Source)
at Script1.run(Script1.groovy:9)
How can I fix it to prevent getting IndexOutOfBoundsException while supporting both, 1234-a0-12;1111-b0-34 and 1234-a0-12;1111-b0 inputs?

Answer 1

You can use Groovy's multiple assignment feature to safely grab 3 values from the second tokenization. Consider following example:
def inputDetails = "1234-a0-12;1111-b0-34"
def cDesc = inputDetails.tokenize(";")
cDesc.each { part ->
def (p1, p2, p3) = part.tokenize('-')
println "DEBUG: Input details are, ${p1} : ${p2} : ${p3}"
}
Output:
DEBUG: Input details are, 1234 : a0 : 12
DEBUG: Input details are, 1111 : b0 : 34
The good thing is that this approach prevents IndexOutOfBoundsException or NullPointerException. If we change the first line to
def inputDetails = "1234-a0-12;1111-b0"
the result is:
DEBUG: Input details are, 1234 : a0 : 12
DEBUG: Input details are, 1111 : b0 : null

Answer 2

You can split the string into a 2D list by further splitting on '-':
def inputDetails = "1234-a0-12;1111-b0-34"
def elements = inputDetails.split(';').collect{it.split('-')}
elements is of type List<List<String>>. When printed, it yields:
[[1234, a0, 12], [1111, b0, 34]]
With this, you can afford more flexibility instead of hard-coding array indexes.
And with "1234-a0-12;1111-b0", it's split into [[1234, a0, 12], [1111, b0]]