Conditional Jolt spec for nested array - json

Question

I am trying to write Jolt spec for the following input. I need to populate the primaryEmail field based on the condition if primary field is true in the emails array
[
{
"uid": "1234mark",
"name": "mark",
"userName": "markw",
"displayName": "Mark W",
"emails": [
{
"primary": false,
"value": "mark#gmail.com"
},
{
"primary": true,
"value": "mark#hotmail.com"
}
]
},
{
"uid": "9876steve",
"name": "steve",
"userName": "stevew",
"displayName": "Steve W",
"emails": [
{
"primary": false,
"value": "steve#gmail.com"
},
{
"primary": true,
"value": "steve#hotmail.com"
}
]
}
]
The desired output is
[
{
"user": {
"externalId": "1234mark",
"name": "mark",
"userName": "markw",
"displayName": "Mark W",
"primaryEmail": "mark#hotmail.com"
}
},
{
"user": {
"externalId": "9876steve",
"name": "steve",
"userName": "stevew",
"displayName": "Steve W",
"primaryEmail": "steve#hotmail.com"
}
}
]
But I get the following incorrect output since I am not able to populate the primaryEmail field conditionally properly.
[
{
"user": {
"externalId": "1234mark",
"name": "mark",
"userName": "markw",
"displayName": "Mark W"
}
},
{
"user": {
"externalId": "9876steve",
"name": "steve",
"userName": "stevew",
"displayName": "Steve W"
}
}
]
The spec I have created is the following
[
{
"operation": "shift",
"spec": {
"*": {
"uid": "[&1].user.externalId",
"name": "[&1].user.name",
"userName": "[&1].user.userName",
"displayName": "[&1].user.displayName",
"title": "[&1].user.title",
"emails": {
"*": {
"primary": {
"true": {
"#(2,value)": "primaryEmail"
}
}
}
}
}
}
}
]
Could someone please help with this query. Thanks.

Answer 1

What you need is to go 5 levels the three up from the innermost object while adding an extra node called user such as
[
{
"operation": "shift",
"spec": {
"*": {
"uid": "[&1].user.externalId",
"*": "[&1].user.&", // the attributes except for "uid" and "emails" array
"emails": {
"*": {
"primary": {
"true": {
"#(2,value)": "[&5].user.&2Email" // replicate literal "primary" by using &2
}
}
}
}
}
}
}
]
the demo on the site http://jolt-demo.appspot.com/ is