forked from mirror/go-json
85 lines
2.6 KiB
Go
85 lines
2.6 KiB
Go
package json
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import (
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"reflect"
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"github.com/goccy/go-json/internal/decoder"
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)
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// CreatePath creates JSON Path.
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//
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// JSON Path rule
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// $ : root object or element. The JSON Path format must start with this operator, which refers to the outermost level of the JSON-formatted string.
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// . : child operator. You can identify child values using dot-notation.
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// .. : recursive descent.
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// [] : subscript operator. If the JSON object is an array, you can use brackets to specify the array index.
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// [*] : all objects/elements for array.
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//
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// Reserved words must be properly escaped when included in Path.
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//
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// Escape Rule
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// single quote style escape: e.g.) `$['a.b'].c`
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// double quote style escape: e.g.) `$."a.b".c`
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func CreatePath(p string) (*Path, error) {
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path, err := decoder.PathString(p).Build()
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if err != nil {
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return nil, err
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}
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return &Path{path: path}, nil
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}
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// Path represents JSON Path.
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type Path struct {
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path *decoder.Path
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}
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// RootSelectorOnly whether only the root selector ($) is used.
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func (p *Path) RootSelectorOnly() bool {
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return p.path.RootSelectorOnly
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}
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// UsedSingleQuotePathSelector whether single quote-based escaping was done when building the JSON Path.
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func (p *Path) UsedSingleQuotePathSelector() bool {
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return p.path.SingleQuotePathSelector
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}
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// UsedSingleQuotePathSelector whether double quote-based escaping was done when building the JSON Path.
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func (p *Path) UsedDoubleQuotePathSelector() bool {
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return p.path.DoubleQuotePathSelector
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}
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// Extract extracts a specific JSON string.
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func (p *Path) Extract(data []byte, optFuncs ...DecodeOptionFunc) ([][]byte, error) {
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return extractFromPath(p, data, optFuncs...)
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}
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// PathString returns original JSON Path string.
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func (p *Path) PathString() string {
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return p.path.String()
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}
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// Unmarshal extract and decode the value of the part corresponding to JSON Path from the input data.
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func (p *Path) Unmarshal(data []byte, v interface{}, optFuncs ...DecodeOptionFunc) error {
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contents, err := extractFromPath(p, data, optFuncs...)
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if err != nil {
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return err
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}
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results := make([]interface{}, 0, len(contents))
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for _, content := range contents {
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var result interface{}
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if err := Unmarshal(content, &result); err != nil {
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return err
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}
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results = append(results, result)
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}
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if err := decoder.AssignValue(reflect.ValueOf(results), reflect.ValueOf(v)); err != nil {
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return err
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}
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return nil
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}
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// Get extract and substitute the value of the part corresponding to JSON Path from the input value.
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func (p *Path) Get(src, dst interface{}) error {
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return p.path.Get(reflect.ValueOf(src), reflect.ValueOf(dst))
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}
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