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Add JQ function to JSON category (#165)
* added new jqFunction * return array always (#163) Co-authored-by: “jdattatr-tibco” <“[email protected]”> * Added valueType to json.jq return type * updated README for jq --------- Co-authored-by: “jdattatr-tibco” <“[email protected]”> Co-authored-by: jdattatr-tibco <[email protected]> Co-authored-by: Vijay Nalawade <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| package json | ||
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| import ( | ||
| "fmt" | ||
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| "github.com/itchyny/gojq" | ||
| "github.com/project-flogo/core/data" | ||
| "github.com/project-flogo/core/data/coerce" | ||
| "github.com/project-flogo/core/data/expression/function" | ||
| ) | ||
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| func init() { | ||
| function.Register(&jq{}) | ||
| } | ||
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| type jq struct { | ||
| } | ||
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| // Name returns the name of the function | ||
| func (jq) Name() string { | ||
| return "jq" | ||
| } | ||
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| // Sig returns the function signature | ||
| func (jq) Sig() (paramTypes []data.Type, isVariadic bool) { | ||
| return []data.Type{data.TypeAny, data.TypeString}, false | ||
| } | ||
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| // Eval executes the function | ||
| func (jq) Eval(params ...interface{}) (interface{}, error) { | ||
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| var err error | ||
| var inputJSON interface{} | ||
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| //1st parameter will be the input json | ||
| inputJSON, err = coerce.ToAny(params[0]) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("unable to coerce input JSON [%+v]: %s", params[0], err.Error()) | ||
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| } | ||
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| //2nd parameter will be the query | ||
| inputQuery, err := coerce.ToString(params[1]) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("unable to coerce the query to string: %s", err.Error()) | ||
| } | ||
| query, err := gojq.Parse(inputQuery) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| var result []interface{} | ||
| iter := query.Run(inputJSON) | ||
| for { | ||
| v, ok := iter.Next() | ||
| if !ok { | ||
| break | ||
| } | ||
| if err, ok := v.(error); ok { | ||
| return nil, fmt.Errorf("error running the query : %s", err) | ||
| } | ||
| result = append(result, v) | ||
| } | ||
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| return result, nil | ||
| } |