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vendor/github.com/exponent-io/jsonpath/path.go
67 строк
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Brendan Burns
Add a dependency on github.com/exponent-io/jsonpath
14 окт 2016, 07:44
14 окт 2016, 07:44
a5ec367
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// Extends the Go runtime's json.Decoder enabling navigation of a stream of json tokens. package jsonpath import "fmt" type jsonContext int const ( none jsonContext = iota objKey objValue arrValue ) // AnyIndex can be used in a pattern to match any array index. const AnyIndex = -2 // JsonPath is a slice of strings and/or integers. Each string specifies an JSON object key, and // each integer specifies an index into a JSON array. type JsonPath []interface{} func (p *JsonPath) push(n interface{}) { *p = append(*p, n) } func (p *JsonPath) pop() { *p = (*p)[:len(*p)-1] } // increment the index at the top of the stack (must be an array index) func (p *JsonPath) incTop() { (*p)[len(*p)-1] = (*p)[len(*p)-1].(int) + 1 } // name the key at the top of the stack (must be an object key) func (p *JsonPath) nameTop(n string) { (*p)[len(*p)-1] = n } // infer the context from the item at the top of the stack func (p *JsonPath) inferContext() jsonContext { if len(*p) == 0 { return none } t := (*p)[len(*p)-1] switch t.(type) { case string: return objKey case int: return arrValue default: panic(fmt.Sprintf("Invalid stack type %T", t)) } } // Equal tests for equality between two JsonPath types. func (p *JsonPath) Equal(o JsonPath) bool { if len(*p) != len(o) { return false } for i, v := range *p { if v != o[i] { return false } } return true } func (p *JsonPath) HasPrefix(o JsonPath) bool { for i, v := range o { if v != (*p)[i] { return false } } return true }