RJSONIO (version 1.3-1.9)

basicJSONHandler: Create handler for processing JSON elements from a parser

Description

This function creates a handler object that is used to consume tokens/elements from a JSON parser and combine them into R objects.

This is slow relative to using C code because this is done in R and also we don't know the length of each object until we have consumed all its elements.

Usage

basicJSONHandler(default.size = 100, simplify = FALSE)

Value

update

a function called with a JSON element and used to process that element and add it to the relevant R object

value

a function to retrieve the result after processing the JSON

Arguments

default.size

the best guess as to the sizes of the different elements. This is used for preallocating space for elements

simplify

a logical value indicating whether to simplify arrays from lists to vectors if the elements are of compatible types.

Author

Duncan Temple Lang

See Also

fromJSON and the handler argument.

Examples

  h = basicJSONHandler()
  x = fromJSON("[1, 2, 3]", h)
  x
  h$value()