func (parser *Parser) parseObject(parent *value.JSONValue) error { parent.ObjectValue = make(map[string]value.JSONValue) firstToken, err := parser.tokenizer.NextToken() if err != nil { return err } if !firstToken.IsEqualTo(token.NewTokenBeginObject()) { return fmt.Errorf("JSON Object must start wit '{'") } for { nextToken, err := parser.tokenizer.PeekToken(0) if err != nil { return err } // End Of Object. if nextToken.IsEqualTo(token.NewTokenEndObject()) { parser.tokenizer.NextToken() break } // String Token must be key of object. if nextToken.IsSameKindTo(token.NewTokenString()) { parser.tokenizer.NextToken() mustbeSeparator, err := parser.tokenizer.NextToken() if err != nil { return err } if !mustbeSeparator.IsEqualTo(token.NewTokenSeparator()) { return fmt.Errorf("Object KeyValue Separator not found, %#v", mustbeSeparator) } currentValue := value.NewJSONValue() err = parser.parseValue(¤tValue) if err != nil { return err } parent.ObjectValue[nextToken.Value] = currentValue // If comma exists after value of object, // continuous token must be string which is key of the object too. maybeComma, err := parser.tokenizer.PeekToken(0) if err == nil && maybeComma.IsEqualTo(token.NewTokenComma()) { parser.tokenizer.NextToken() continue } break } return fmt.Errorf("Invalid JSON. Object is wrong") } return nil }
// Parse parses JSON. func (parser *Parser) Parse() (value.JSONValue, error) { firstToken, err := parser.tokenizer.PeekToken(0) if err != nil { return value.NewJSONValue(), err } if firstToken.IsEqualTo(token.NewTokenBeginObject()) { parent := value.NewJSONValue() err := parser.parseObject(&parent) if err != nil { return value.NewJSONValue(), err } return parent, nil } if firstToken.IsEqualTo(token.NewTokenBeginArray()) { parent := value.NewJSONValue() err := parser.parseArray(&parent) if err != nil { return value.NewJSONValue(), err } return parent, nil } return value.NewJSONValue(), fmt.Errorf("Invalid JSON") }