CODEWITHSUNDEEP
jsonlistgroovyhashmap
Sri
Sri

Reputation: 25

transform list to list of maps in Groovy

Can anyone help to convert a list to list of Maps in Groovy ?

I have a list as below

[war, jar]

and a variable with name "value" = 2.0.0

I want to convert this into a list with maps [["pack": "war", "ver": "2.0.0"],["pack": jar, "ver": "2.0.0"]]

and create a json.

{
    "ProjectId": "Projects-16",
    "ChannelId": "Channels-41",
    "Version": "2.0.1.0-10",
    "selectedPackages": [{"pack": "war", "ver": "2.0.0"}, {"pack": jar, "ver": "2.0.0"]}]
}

Upvotes: 0

Views: 1114

Answers (1)

Catalin
Catalin

Reputation: 484

Here is the solution:

import groovy.json.JsonOutput

def packages = ["war", "jar"]
def value = "2.0.0"
def list = packages.collect { [pack : it, ver : value] }
def object = [
    ProjectId: "Projects-16",
    ChannelId: "Channels-41",
    Version: "2.0.1.0-10",
    selectedPackages: list
]
def json = JsonOutput.toJson(object)
println JsonOutput.prettyPrint(json)

Each {} entity in JSON is a map in Groovy therefore the expected [{}, {}] is a list of maps. You need just to construct the right objects using collect with the right transformation.

Edit
I updated the solution to return the exact json output as desired using a list and the variable value.

The output is this:

{
    "ProjectId": "Projects-16",
    "ChannelId": "Channels-41",
    "Version": "2.0.1.0-10",
    "selectedPackages": [
        {
            "pack": "war",
            "ver": "2.0.0"
        },
        {
            "pack": "jar",
            "ver": "2.0.0"
        }
    ]
}

Upvotes: 1

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