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diff --git a/vendor/github.com/exponent-io/jsonpath/README.md b/vendor/github.com/exponent-io/jsonpath/README.md new file mode 100644 index 000000000..382fb3138 --- /dev/null +++ b/vendor/github.com/exponent-io/jsonpath/README.md @@ -0,0 +1,66 @@ +[![GoDoc](https://godoc.org/github.com/exponent-io/jsonpath?status.svg)](https://godoc.org/github.com/exponent-io/jsonpath) +[![Build Status](https://travis-ci.org/exponent-io/jsonpath.svg?branch=master)](https://travis-ci.org/exponent-io/jsonpath) + +# jsonpath + +This package extends the [json.Decoder](https://golang.org/pkg/encoding/json/#Decoder) to support navigating a stream of JSON tokens. You should be able to use this extended Decoder places where a json.Decoder would have been used. + +This Decoder has the following enhancements... + * The [Scan](https://godoc.org/github.com/exponent-io/jsonpath/#Decoder.Scan) method supports scanning a JSON stream while extracting particular values along the way using [PathActions](https://godoc.org/github.com/exponent-io/jsonpath#PathActions). + * The [SeekTo](https://godoc.org/github.com/exponent-io/jsonpath#Decoder.SeekTo) method supports seeking forward in a JSON token stream to a particular path. + * The [Path](https://godoc.org/github.com/exponent-io/jsonpath#Decoder.Path) method returns the path of the most recently parsed token. + * The [Token](https://godoc.org/github.com/exponent-io/jsonpath#Decoder.Token) method has been modified to distinguish between strings that are object keys and strings that are values. Object key strings are returned as the [KeyString](https://godoc.org/github.com/exponent-io/jsonpath#KeyString) type rather than a native string. + +## Installation + + go get -u github.com/exponent-io/jsonpath + +## Example Usage + +#### SeekTo + +```go +import "github.com/exponent-io/jsonpath" + +var j = []byte(`[ + {"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10}}, + {"Space": "RGB", "Point": {"R": 98, "G": 218, "B": 255}} +]`) + +w := json.NewDecoder(bytes.NewReader(j)) +var v interface{} + +w.SeekTo(1, "Point", "G") +w.Decode(&v) // v is 218 +``` + +#### Scan with PathActions + +```go +var j = []byte(`{"colors":[ + {"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10, "A": 58}}, + {"Space": "RGB", "Point": {"R": 98, "G": 218, "B": 255, "A": 231}} +]}`) + +var actions PathActions + +// Extract the value at Point.A +actions.Add(func(d *Decoder) error { + var alpha int + err := d.Decode(&alpha) + fmt.Printf("Alpha: %v\n", alpha) + return err +}, "Point", "A") + +w := NewDecoder(bytes.NewReader(j)) +w.SeekTo("colors", 0) + +var ok = true +var err error +for ok { + ok, err = w.Scan(&actions) + if err != nil && err != io.EOF { + panic(err) + } +} +``` |