JSON

This is the JSON class version 1.0.

Provides JSON serializing and deserializing, done correctly and fast. Based on JSON::XS. Basic operations are accessible via class functions. Advanced options are available through the use of a JSON class instance.

Initializer 

$json = JSON()

Creates a new JSON class instance.

  • optional strict: Bool - Enables strict decoding. This is default. If explicitly disabled, shell-style (#) comments are allowed, and extra commas are silently ignored. You may want to disable strict decoding for human-created texts such as configuration files.

  • optional consistent: Bool - If true, the same data structure will output the same JSON text each time. This is not the default behavior. Without consistent, the pairs in JSON objects will be spit out in a random order. Encoding is considerably slower when consistent is enabled because all object keys have to be sorted.

  • optional charset: Charset - Specifies the character set used for both encoding and decoding. See this class's Charset type for available options.

  • optional strictRoot: Bool - If enabled, the root level of any JSON text (encoded or decoded) must be an array or object. The default is to allow any root level value, which is an extension to RFC4627.

  • optional pretty: Bool - If true, .encode() output will span multiple lines and be properly indented with extra whitespace. This is equivalent to providing all of indent, spaceBefore, and spaceAfter.

  • optional spaceBefore: Bool - If true, .encode() will add an extra optional space before the colon separating keys from values in JSON objects.

  • optional spaceAfter: Bool - If true, .encode() will add an extra optional space after the colon separating keys from values in JSON objects.

  • optional indent: Bool - If true, .encode() will use a multiline format as output, putting every array member or object/hash key-value pair into its own line, identifying them properly.

Methods

encode 

$json.encode($data)

Encodes some data as JSON text. The output of this method is dependent on the various options provided at initialization.

  • data: Any - An object to convert to JSON text.

decode 

$json.decode($json: Str)

Decodes a JSON text. The success or failure of this method is dependent on the various options provided at initialization.

  • json: Str - A JSON text to parse and convert to a Ferret object.

decoderAdd 

$json.decoderAdd($fragment: Str)

Adds a JSON text fragment to the decoder buffer.

The methods .decoderAdd() and .decoderDone() are for parsing fragments of JSON data. This is useful when a very large JSON text is read from a network or file stream.

Each call to .decoderAdd() will append a fragment of JSON text to the decoder buffer. Once the buffer has enough JSON data to create a value, it will do so, and it will add the value to its return buffer.

At the end of a JSON stream, the user should use the .decoderDone() method to extract the JSON value(s) from the return buffer. If the JSON decoder found multiple values back-to-back, such as [1,2][3,4], it will return a list of those values, such as [ [1,2], [3,4] ]. If the decoder found a single value, only that value is returned.

Because .decoderDone() returns a single value as-is, different inputs can have the same output. Consider the following

  • A JSON list: .decoderAdd('[1,2]')
  • Two back-to-back values: .decoderAdd('1 2')

.decoderDone().data following either of these would yield the same result, a list [1, 2].

  • fragment: Str - A fragment of JSON text to add to the decoder buffer.

decoderDone 

$json.decoderDone()

Handles the decoder buffer. See .decoderAdd() for an explanation of decoder buffers.

decoderReset 

$json.decoderReset()

Resets the decoder buffer. See .decoderAdd() for an explanation of decoder buffers.

Class functions

encode 

JSON.encode($data)

Convenient class function to encode data to a UTF-8 JSON text. See the .encode() method for more options.

  • data: Any - An object to convert to JSON text.

decode 

JSON.decode($json: Str)

Convenient class function to decode UTF-8 JSON data. See the .decode() method for more options.

  • json: Str - A JSON text to parse and convert to a Ferret object.

Type interfaces

Charset

Defines the various character sets available for JSON encoding and decoding. Used for the .charset property. See the initializer.

Accepted values

In order to comply, the object must be equal to one of these values.

  • :ascii - RFC4627, range 0..127, ignores otherwise.
  • :latin1 - ISO-8859-1, range 0..255, ignores otherwise.
  • :utf8 - Expects utf8-encoded input and outputs utf8.

End of the JSON class.

This file was generated automatically by the Ferret compiler from JSON.frt.