Jolt transformation with nested arrays. -


i'm trying write spec below transformation using jolt transformation. i'm interested in changing name of key in json, value should remain same. me out.

input json:

[   {     "list1": [       {         "id": "cpp1600000009846",         "list2": [           {             "amount": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "code": "conamp"           },           {             "amount": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "code": "pccpri"           },           {             "amount": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "code": "pccpci"           },           {             "amount": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "code": "pccpii"           }         ]       },       {         "id": "cpp1600000009846",         "list2": [           {             "amount": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "code": "coneit"           },           {             "amount": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "code": "concrt"           },           {             "amount": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "code": "connct"           }         ]       }     ]   } ]

expected output:

[   {     "lista": [       {         "num": "cpp1600000009846",         "listb": [           {             "rate": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "covg_code": "conamp"           },           {             "rate": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "covg_code": "pccpri"           },           {             "rate": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "covg_code": "pccpci"           },           {             "rate": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "covg_code": "pccpii"           }         ]       },       {         "num": "cpp1600000009846",         "listb": [           {             "rate": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "covg_code": "coneit"           },           {             "rate": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "covg_code": "concrt"           },           {             "rate": {               "formattedprimeamount": "0.00",               "primeamount": "0.00"             },             "covg_code": "connct"           }         ]       }     ]   } ]

use following spec

[   {     "operation": "shift",     "spec": {         "list1" : {             "*": {                 "id" : "lista[&1].num",                 "list2" : {                     "*": {                         "amount" : "lista[&1].listb[&3].rate",                         "code" : "lista[&1].listb[&3].covg_code"                     }                 }             }         }     }   }  ]

run spec using following code

    list<object> chainrspecjson = jsonutils.filepathtolist( "d:\\path\\to\\spec.json" );     chainr chainr = chainr.fromspec( chainrspecjson );      list<object> inputjsonlist = jsonutils.filepathtolist( "d:\\path\\to\\input.json" );      list<object> outputlist = new arraylist<object>();      for(object singleobj : inputjsonlist){         object transformedoutput = chainr.transform( singleobj );         outputlist.add(transformedoutput);     }

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