CODEWITHSUNDEEP
jsongroovy
AndyJ
AndyJ

Reputation: 1314

Collect list of attributes with groovy and jsonslurper into single list

What's the best way to collect a list of attributes from a JSON hierarchy? Here's what I'm trying to do:

import groovy.json.JsonSlurper

def jsontxt = '''
{
    "lvl1": [
        {
            "lvl2": [
                {
                  "lvl3": [
                                {
                                    "a1": false,
                                    "a2": {
                                        "a2b1": false,
                                        "a2b2": false
                                    },
                                    "a3": "wantvalue1"
                                },
                                {
                                    "a1": false,
                                    "a2": {
                                        "a2b1": false,
                                        "a2b2": false
                                    },
                                    "a3": "wantvalue2"
                                }
                        ],
                },
            ],
        }
    ]
}
'''

def jsresult = new JsonSlurper().parseText(jsontxt)
def mytry = jsresult.lvl1.lvl2.lvl3.collect{it.a3} // [[[wantvalue1, wantvalue2]]]

assert ["wantvalue1","wantvalue2"] == mytry

Apologies the input is not as clean as it could be but I didn't want to lose my situation.

What I want is a basic list without the additional empty lists. I know there must be a really cool way to do this but I'm not groovy enough for it. . . help??

Upvotes: 0

Views: 2612

Answers (1)

dmahapatro
dmahapatro

Reputation: 50245

Pretty close. Try flatten().

Try jsresult.lvl1.lvl2.lvl3.collect{it.a3}.flatten() or myTry.flatten()

Upvotes: 1

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