java - Join two jsons based on element -


i have 2 json files. need parse , join json single structure

lineage.json

{    "lineage": [{         "sourcecolumnid": "vmb_bestaddress.snapshot_ts",         "description": "",         "targetcolumnid": "vmb_bestaddressusage.nxreins"     },     {         "sourcecolumnid": "dsl_record_sources.mamact",         "description": "",         "targetcolumnid": "g2_zumadf00.mamact"     },     {         "sourcecolumnid": "dsl_record_sources.mamade",         "description": "",         "targetcolumnid": "g2_zumadf00.hdf_s_pol_gen"     }] }

column.json

{     "column": [{         "id": 39700,         "columnid": "vmb_bestaddress.snapshot_ts",         "column": "snapshot_ts",         "datatype": "string",         "length": "",         "table": "vmb_bestaddress",     },     {         "id": 39701,         "columnid": "vmb_bestaddressusage.nxreins",         "column": "nxreins",         "datatype": "string",         "length": "",         "table": "vmb_bestaddressusage",      },     {         "id": 39702,         "columnid": "vmb_bestaddressusage.pkaddresscode",         "column": "pkaddresscode",         "datatype": "string",         "length": "",         "table": "vmb_bestaddressusage",     }] }

i need join 2 jsons such every match of sourcecolumnid , targetcolumnid in column following json structure must populated

{     output:{         sourcecolumnid:vmb_bestaddress.snapshot_ts,         sourcecolumnname:snapshot_ts,         targetcolumnid:vmb_bestaddressusage.nxreins,         targetcolumnnamenxreins,     } }

i need join lookup 2 json output such

sourcecolumnname -> column name column.json columnid , sourcecolumnid same. targetcolumnname also.

    string str = "xxx";     // column.json      jsonarray jsonarraycolumn = json.parseobject(str);     map<string, jsonobject> column = new hashmap();     // {id:name}     for(int = 0; < jsonarraycolumn.size(); i++){    // loop         jsonobject obj = jsonarraycolumn.getjsonobject(i);         column.put(obj.getstring("columnid"), obj.getstring("column"));     }      string str2 = "xxx";    // lineage.json     jsonarray jsonarraylineage = json.parseobject(str2);      jsonarray resultarray = new jsonarray();     for(int = 0; < jsonarraylineage.size(); i++){   // loop         jsonobject lineageobj = jsonarraylineage.getjsonobject(i);         jsonobject obj = new jsonobject();         obj.put("sourcecolumnid", lineageobj.get("sourcecolumnid"));         obj.put("sourcecolumnname", column.get(lineageobj.get("sourcecolumnid")));         obj.put("targetcolumnid", lineageobj.get("targetcolumnid"));         obj.put("targetcolumnname", column.get(lineageobj.get("targetcolumnid")));     }

the resultarray want.


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