java - Modifying all the string primitives in a JSON structure -

in java, given textual representation of json object, how can apply function leaves strings?

for example, converting string values upper case:
input:

{     "name": "john",     "address": {         "street": "elm",         "number": 4     },     "children": ["george", "paul"] }

output:

{     "name": "john",     "address": {         "street": "elm"         "number": 4     },     "children": ["george", "paul"] }

use gson (or other json parser) parse data map, remove non strings, serialize json using gson

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