MODULES Uize.Json

SEARCHEXAMPLESVIEW SOURCE CODE

1. Introduction

The Uize.Json module provides versatile methods for serializing and deserializing objects to and from the JSON (JavaScript Object Notation) format.

DEVELOPERS: Chris van Rensburg

The Uize.Json module is a package under the Uize namespace, providing versatile serializaton options to permit a wide array of results, from prettified JSON (with linebreaks, indentation, key sorting, etc.) to compact (efficient for AJAX communication).

2. Static Methods

2.1. Uize.Json.from

SYNTAX

valueANYTYPE = Uize.Json.from (jsonSTR);

NOTES

see the companion Uize.Json.to static method

2.2. Uize.Json.to

Serializes the specified value to a string of JSON format. The value to serialize can be a string, boolean, number, object, array, null, undefined, or a regular expression.

SYNTAX

jsonSTR = Uize.Json.to (valueANYTYPE);

VARIATION 1

jsonSTR = Uize.Json.to (valueANYTYPE,serializationOptionsOBJ);

When the optional serializationOptionsOBJ parameter is specified, then the way in which the value is serialized to JSON format can be configured to produce wide ranging results, from prettified to compact. The value of the serializationOptionsOBJ parameter should be an object, with properties as follows...

SERIALIZATION OPTIONS

{
  indentChars:indentCharsSTR,         // optional, defaults to one tab
  linebreakChars:linebreakCharsSTR,   // optional, defaults to one linebreak
  quoteChar:quoteCharSTR,             // optional, defaults to a single quote
  keyDelimiter:keyDelimiterSTR,       // optional, defaults to colon without spaces
  padKeys:padKeysBOOL,                // optional, defaults to false
  keyAlign:keyAlignSTR,               // 'left' (default) | 'center' | 'right'
  whenToQuoteKeys:whenToQuoteKeysSTR, // 'auto' (default) | 'auto all' | 'always'
  sortKeys:sortKeysBOOL               // optional, defaults to false
}

2.2.1. indentChars

A string, specifying the characters that should be used to indent key/value pairs of objects and elements of arrays. Defaults to one tab. Specify an empty string for compact serialization.

2.2.2. linebreakChars

A string, specifying the characters to be used to separate key/value pairs of objects and elements of arrays. Defaults to a single linebreak. Specify an empty string for compact serialization.

2.2.3. quoteChar

A string, specifying the character to be used when quoting string literals for string values or object property names (keys) that require quoting. Defaults to a single quote character.

2.2.4. keyDelimiter

A string, specifying the characters to be used when separating keys from values for serializing objects. Defaults to a colon without padding spaces around it. Add your own spaces to order.

2.2.5. padKeys

A boolean, specifying whether or not keys should be padded with spaces so that all keys occupy the same number of characters and so that the keyDelimiter character lines up vertically. Defaults to false. See the companion keyAlign property.

2.2.6. keyAlign

A string, specifying whether the keys should be aligned left, center, or right when padding keys. Only applicable when the companion padKeys property is set to true.

2.2.7. whenToQuoteKeys

A string, specifying under what conditions object property names (keys) should be quoted. The default value of 'auto' causes individual keys to only be quoted when necessary. The value of 'auto all' causes all keys of the same object to be quoted if any of the keys needs to be quoted. The value of 'always' causes all keys to always be quoted.

2.2.8. sortKeys

A boolean, specifying whether or not object property names (keys) should be sorted alphabetically when serializing objects. Defaults to false.

EXAMPLES

For the following examples, let's assume that we have a JavaScript object defined as follows...

var myObject = {
  someNumber:123.456,
  aBoolean:true,
  'value is a regular expression':/\d+/gim,
  123.456:'it\'s a floating point key!',
  '~!@#$%^&*()_+':1,
  'a key with a double quote "':1,
  'a key with a single quote \'':1
};

EXAMPLE 1

The following call to Uize.Json.to...

Uize.Json.to (myObject,{keyDelimiter:' : '});

...would produce the output...

{
  someNumber : 123.456,
  aBoolean : true,
  'value is a regular expression' : /\d+/gim,
  123.456 : 'it\'s a floating point key!',
  '~!@#$%^&*()_+' : 1,
  'a key with a double quote "' : 1,
  'a key with a single quote \'' : 1
}

EXAMPLE 2

The following call to Uize.Json.to...

Uize.Json.to (myObject,{keyDelimiter:' : ',padKeys:true,keyAlign:'left'});

...would produce the output...

{
  someNumber                      : 123.456,
  aBoolean                        : true,
  'value is a regular expression' : /\d+/gim,
  123.456                         : 'it\'s a floating point key!',
  '~!@#$%^&*()_+'                 : 1,
  'a key with a double quote "'   : 1,
  'a key with a single quote \''  : 1
}

EXAMPLE 3

The following call to Uize.Json.to...

Uize.Json.to (myObject,{keyDelimiter:' : ',padKeys:true,keyAlign:'right'});

...would produce the output...

{
                       someNumber : 123.456,
                         aBoolean : true,
  'value is a regular expression' : /\d+/gim,
                          123.456 : 'it\'s a floating point key!',
                  '~!@#$%^&*()_+' : 1,
    'a key with a double quote "' : 1,
   'a key with a single quote \'' : 1
}

EXAMPLE 4

The following call to Uize.Json.to...

Uize.Json.to (myObject,{keyDelimiter:' : ',whenToQuoteKeys:'auto all'});

...would produce the output...

{
  'someNumber' : 123.456,
  'aBoolean' : true,
  'value is a regular expression' : /\d+/gim,
  '123.456' : 'it\'s a floating point key!',
  '~!@#$%^&*()_+' : 1,
  'a key with a double quote "' : 1,
  'a key with a single quote \'' : 1
}

EXAMPLE 5

The following call to Uize.Json.to...

Uize.Json.to (myObject,{keyDelimiter:' : ',quoteChar:'"'});

...would produce the output...

{
  someNumber : 123.456,
  aBoolean : true,
  "value is a regular expression" : /\d+/gim,
  123.456 : "it's a floating point key!",
  "~!@#$%^&*()_+" : 1,
  "a key with a double quote \"" : 1,
  "a key with a single quote '" : 1
}

EXAMPLE 6

The following call to Uize.Json.to...

Uize.Json.to (myObject,{keyDelimiter:' : ',sortKeys:true});

...would produce the output...

{
  123.456 : 'it\'s a floating point key!',
  'a key with a double quote "' : 1,
  'a key with a single quote \'' : 1,
  aBoolean : true,
  someNumber : 123.456,
  'value is a regular expression' : /\d+/gim,
  '~!@#$%^&*()_+' : 1
}

VARIATION 2

jsonSTR = Uize.Json.to (valueANYTYPE,'mini');

When the special string value 'mini' is specified in place of the serializationOptionsOBJ parameter, then serialization options are used that will produce a compact serialization of the specified value. This is equivalent to specifying the value {indentChars:'',linebreakChars:''} for the serializationOptionsOBJ parameter.

NOTES

see the companion Uize.Json.from static method