jsonata_dart 0.3.2

A pure Dart implementation of JSONata - JSON query and transformation language for querying and transforming JSON data.

Changelog

0.3.2

• Fixed LICENSE file format for proper OSI license recognition
• Fixed static analysis warnings and applied code formatting

0.3.1

• Performance optimizations - Significant performance improvements for common query patterns:
  • Fast-path for simple name-only path expressions (a.b.c)
  • Fast-path for array index access (positive and negative indices)
  • Fast-path for paths with simple numeric index filters (a.b[0].c[0])
  • Fast-path for simple equality filter predicates (arr[field = 'value'])
  • Fast-path for array projection in path expressions (arr.fieldName)
  • Optimized normalizeResult to avoid deep traversal of raw JSON
  • Optimized path evaluation for simple left-side patterns
• Bug fix - Fixed array constructor flattening in path expressions (arr.[field].next)

0.3.0

• Parent operator (%) - Reference parent objects in path expressions
• Sort operator (^(...)) - Sort arrays by specified keys with ascending/descending support
• Focus operator (@$var) - Bind current item to a variable while keeping navigation context at parent level
• Index bind operator (#$var) - Bind iteration index to a variable
• Fixed contiguous focus steps handling per JSONata specification
• Fixed $keys to unwrap single-element arrays
• 726 tests passing (672 suite + 54 unit)

0.2.0

• Date/time functions:
  • $now([picture [, timezone]]) - Returns current timestamp in ISO 8601 format or formatted with picture string
  • $millis() - Returns current timestamp as milliseconds since Unix epoch
  • $fromMillis(number [, picture [, timezone]]) - Convert milliseconds to formatted string
  • $toMillis(timestamp [, picture]) - Parse timestamp string to milliseconds
  • Full XPath/XQuery picture string support for date/time formatting and parsing
  • All component specifiers: Y, M, D, d, F, W, w, X, x, H, h, P, m, s, f, Z, z
  • Presentation modifiers: numeric, name, ordinal, roman, words
• Regular expression functions:
  • $match(string, regex [, limit]) - Find regex matches with match objects
  • $replace(string, regex, replacement) - Replace with regex, capture groups, or lambda functions
  • $contains(string, regex) - Test if string matches regex
  • $split(string, regex [, limit]) - Split string by regex pattern
  • Partial application support with ? placeholder
• Transform operator (~>) - Function chaining with left-associativity
• Bug fixes:
  • Fixed ~> operator to be left-associative (so a ~> b ~> c = (a ~> b) ~> c)
• Error handling improvements:
  • D3132: Unknown component specifier in date/time picture
  • D3133: Unsupported name format for component
  • D3136: Underspecified date/time (gaps or unsupported formats)
• 661 tests passing (607 suite + 54 unit)

0.1.0

• Initial release
• Core JSONata language features:
  • Path expressions (a.b.c, a[0], a.b[c > 0])
  • Wildcards (*, **)
  • Array/object constructors
  • Arithmetic, comparison, and boolean operators
  • Conditional expressions (a ? b : c)
  • Variable binding ($x := value)
  • Lambda expressions (function($x) { $x * 2 })
  • Object grouping operator (items{category: $sum(price)})
  • Range operator ([1..10])
• Built-in functions:
  • String: $string, $length, $substring, $uppercase, $lowercase, $trim, $pad, $split, $join, $contains, $replace
  • Numeric: $number, $abs, $floor, $ceil, $round, $power, $sqrt, $random, $sum, $max, $min, $average, $formatNumber, $formatBase, $formatInteger, $parseInteger
  • Array: $count, $append, $sort, $reverse, $shuffle, $distinct, $zip, $flatten
  • Object: $keys, $values, $spread, $merge, $lookup, $each
  • Boolean: $boolean, $not, $exists
  • Type: $type
  • Higher-order: $map, $filter, $reduce, $single
• Custom function registration
• Variable binding
• JSONata-compatible error codes