added parsing
diff --git a/src/gojsonpointer/pointer.go b/src/gojsonpointer/pointer.go
index 7348f6e..64ee83b 100644
--- a/src/gojsonpointer/pointer.go
+++ b/src/gojsonpointer/pointer.go
@@ -5,6 +5,63 @@
package gojsonpointer
import (
-
+ "errors"
+ "strings"
)
+const (
+ EMPTY_POINTER = ``
+ POINTER_SEPARATOR = `/`
+)
+
+const (
+ INVALID_START = `JSON pointer must be empty or start with a "/"`
+)
+
+func NewJsonPointer(jsonPointerString string) (JsonPointer, error) {
+
+ var p JsonPointer
+ err := p.parse(jsonPointerString)
+ return p, err
+}
+
+type JsonPointer struct {
+ stringRepresentation string
+ referenceTokens []string
+}
+
+func (p *JsonPointer) parse(jsonPointerString string) error {
+
+ var err error
+ p.stringRepresentation = jsonPointerString
+
+ if p.stringRepresentation != EMPTY_POINTER {
+ if !strings.HasPrefix(p.stringRepresentation, POINTER_SEPARATOR) {
+ err = errors.New(INVALID_START)
+ } else {
+ referenceTokens := strings.Split(p.stringRepresentation, POINTER_SEPARATOR)
+ for _, referenceToken := range referenceTokens[1:] {
+ p.referenceTokens = append(p.referenceTokens, decodeReferenceToken(referenceToken))
+ }
+ }
+ }
+
+ return err
+}
+
+func (p *JsonPointer) String() string {
+ return p.stringRepresentation
+}
+
+const (
+ ENCODED_REFERENCE_TOKEN_0 = `~0`
+ ENCODED_REFERENCE_TOKEN_1 = `~1`
+ DECODED_REFERENCE_TOKEN_0 = `~`
+ DECODED_REFERENCE_TOKEN_1 = `/`
+)
+
+func decodeReferenceToken(token string) string {
+ step1 := strings.Replace(token, ENCODED_REFERENCE_TOKEN_1, DECODED_REFERENCE_TOKEN_1, -1)
+ step2 := strings.Replace(step1, ENCODED_REFERENCE_TOKEN_0, DECODED_REFERENCE_TOKEN_0, -1)
+ return step2
+}
