Implement xsd:gYear codec and data type#45
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Adds support for the xsd:gYear XML Schema data type. Includes: - A `Year` class in `lib/src/types/year.dart` to represent gYear values, handling positive/negative years and optional timezones. - A `YearCodec` in `lib/src/codecs/g_year/year_codec.dart` for encoding and decoding gYear values. - Unit tests for both the `Year` type and `YearCodec`. - Exports for the new type and codec in `lib/xsd.dart`.
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Summary of Changes
Hello @mark-dropbear, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request significantly extends the library's XML Schema Definition (XSD) datatype support by fully implementing the xsd:gYear built-in type. It introduces a new GregorianYear class to model this datatype, complete with robust parsing and serialization logic, and integrates it into the existing codec system. This enhancement allows for accurate handling of year-only date representations as defined by the XSD 1.1 specification.
Highlights
- New Data Type:
xsd:gYear: Introduces theGregorianYearclass to representxsd:gYearvalues, including support for year (positive, negative, and zero) and optional timezone offsets, adhering to the XSD 1.1 specification. - Parsing and Serialization: Implements
GregorianYear.parse()for converting XSDgYearlexical forms intoGregorianYearobjects, andGregorianYear.toString()for canonical serialization, ensuring correct year padding and timezone representation. - Codec Integration: Provides
GregorianYearCodecalong with dedicated encoder and decoder classes to facilitate seamless conversion betweenGregorianYearobjects and their string representations within the library's existing codec framework. - Comprehensive Testing: Adds extensive unit tests for both the
GregorianYeardata type and its associated codec, ensuring correctness and robustness across various valid and invalid input scenarios, including edge cases for years and timezones.
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Code Review
This pull request introduces support for the xsd:gYear data type. A potential correctness issue was identified in the regular expression used for parsing gYear strings, which might reject some valid inputs. The feedback includes a suggested fix for the regex to make it more compliant with the XSD specification.
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