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50 lines
1.4 KiB
50 lines
1.4 KiB
9 years ago
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package jmespath
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import "strconv"
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// JmesPath is the epresentation of a compiled JMES path query. A JmesPath is
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// safe for concurrent use by multiple goroutines.
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type JMESPath struct {
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ast ASTNode
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intr *treeInterpreter
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}
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// Compile parses a JMESPath expression and returns, if successful, a JMESPath
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// object that can be used to match against data.
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func Compile(expression string) (*JMESPath, error) {
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parser := NewParser()
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ast, err := parser.Parse(expression)
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if err != nil {
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return nil, err
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}
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jmespath := &JMESPath{ast: ast, intr: newInterpreter()}
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return jmespath, nil
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}
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// MustCompile is like Compile but panics if the expression cannot be parsed.
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// It simplifies safe initialization of global variables holding compiled
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// JMESPaths.
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func MustCompile(expression string) *JMESPath {
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jmespath, err := Compile(expression)
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if err != nil {
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panic(`jmespath: Compile(` + strconv.Quote(expression) + `): ` + err.Error())
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}
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return jmespath
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}
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// Search evaluates a JMESPath expression against input data and returns the result.
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func (jp *JMESPath) Search(data interface{}) (interface{}, error) {
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return jp.intr.Execute(jp.ast, data)
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}
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// Search evaluates a JMESPath expression against input data and returns the result.
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func Search(expression string, data interface{}) (interface{}, error) {
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intr := newInterpreter()
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parser := NewParser()
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ast, err := parser.Parse(expression)
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if err != nil {
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return nil, err
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}
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return intr.Execute(ast, data)
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}
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