How to get all nested keys with values in Map groovy?

Question

I need to iterate this Map with all predecessor keys in groovy which I need to run through Jenkins.

a={b={c=1,d=2,e=3},r={p=4},q=5}

I want output like below and input is dynamic and format may vary. Please help since 1 week I am trying.

a:b:c=1

a:b:d=2

a:b:e=3

a:r:p=4

a:q=5

Answer 1

You can use a recursive function to achieve this result, here is an example:

def iterateMap(Map map, String prefix = "") {
    map.each { key, value ->
        if (value instanceof Map) {
            iterateMap(value, "$prefix$key:")
        } else {
            println "a:$prefix$key=$value"
        }
    }
}

def a = [
    b: [
        c: 1,
        d: 2,
        e: 3
    ],
    r: [
        p: 4
    ],
    q: 5
]

iterateMap(a)

In this code, the iterateMap function takes a map as input and an optional prefix string (initialized as an empty string). It iterates over each key-value pair in the map. If the value is itself a map, the function recursively calls itself with the nested map and the updated prefix ("$prefix$key:"). If the value is not a map, it prints the key-value pair in the desired format ("$prefix$key=$value").