JSON Schema to Go Generator (jsg) | WORK IN PROGRESS

jsg generates Golang code out of JSON schema.

The flow

• Parse JSON schema file.
• Build internal tree representation. AST.
• Generate Go code based on AST.

Modules

• ast: reads the JSON schema and builds Abstract Syntax Tree (AST)
• generator: produces Go code out of AST.

What's supported

Features

Feature	Parse	Generate	Validation	Notes
string	x	x
string:length	x
string:pattern	x
string:format	x	x
number	x	x
integer	x	x
object	x
array	x	x
boolean	x	x
null	x	x
multi types	x

• Parse: library recognizes the feature inside a JSON schema and converts it’s into AST.
• Generate: library reads AST and generated Go code for the feature.
• Validation: library is able to validate a data againt feature.

Specification support

Draft 2020-12

Specification section	Parse	Generate	Validation	Notes
6.1. Validation Keywords for Any Instance Type
6.1.1. type	x
6.1.2. enum
6.1.3. const
6.2. Validation Keywords for Numeric Instances
6.2.1. multipleOf	x
6.2.2. maximum	x
6.2.3. exclusiveMaximum	x
6.2.4. minimum	x
6.2.5. exclusiveMinimum	x
6.3. Validation Keywords for Strings
6.3.1. maxLength	x
6.3.2. minLength	x
6.3.3. pattern	x
6.4. Validation Keywords for Arrays
6.4.1. maxItems
6.4.2. minItems
6.4.3. uniqueItems
6.4.4. maxContains
6.4.5. minContains
6.5. Validation Keywords for Objects
6.5.1. maxProperties
6.5.2. minProperties
6.5.3. required
6.5.4. dependentRequired
:-------------------------------------------------	:-----:	:--------:	:----------:	:-----:
7.3. Defined Formats	x
7.3.1. Dates, Times, and Duration	x
date-time	x	x
date	x	x
time	x	x
duration	x	x
7.3.2. Email Addresses	x
email	x	x
idn-email	x	x
7.3.3. Hostnames	x
hostname	x	x
idn-hostname	x	x
7.3.4. IP Addresses	x
ipv4	x	x
ipv6	x	x
7.3.5. Resource Identifiers	x
uri	x	x
uri-reference	x	x
iri	x	x
iri-reference	x	x
uuid	x	x
7.3.6. uri-template	x	x
7.3.7. JSON Pointers	x	x
json-pointer	x	x
relative-json-pointer	x	x
7.3.8. regex	x	x