jsonTreeEncode method

@override Object? jsonTreeEncode(void instance, { JsonEncodingContext? context, })

Converts the argument into a JSON tree.

Valid nodes in JSON trees

The method returns a tree, where nodes are instances of:

• null
• bool
• double
• String
• List, where items are valid nodes.
• Map<String,Object?>, where keys are strings and values are valid nodes.

Errors

Thrown errors are subclasses of GraphNodeError, which describes which node in the input graph caused the error.

Examples

import 'package:kind/kind.dart';

void main() {
  final date = Date(2020, 12, 31);
  final kind = DateKind();
  kind.jsonTreeEncode(date); // --> '2020-12-31'
}

Implementing this method

Implementations must use context to:

• Serialize other values.
• Construct errors.

If context is null, implementations must construct one with JsonDecodingContext().

Implementation

@override
Object? jsonTreeEncode(void instance, {JsonEncodingContext? context}) {
  return null;
}