JsonDecoder class final

This class parses JSON strings and builds the corresponding objects.

A JSON input must be the JSON encoding of a single JSON value, which can be a list or map containing other values.

Throws FormatException if the input is not valid JSON text.

Example:

const JsonDecoder decoder = JsonDecoder();
const String jsonString = '''
 {
 "data": [{"text": "foo", "value": 1 },
 {"text": "bar", "value": 2 }],
 "text": "Dart"
 }
''';
final Map<String, dynamic> object = decoder.convert(jsonString);
final item = object['data'][0];
print(item['text']); // foo
print(item['value']); // 1
print(object['text']); // Dart

When used as a StreamTransformer, the input stream may emit multiple strings. The concatenation of all of these strings must be a valid JSON encoding of a single JSON value.

Inheritance

• Object
• Converter <String , Object?>
• JsonDecoder

Constructors

JsonDecoder.new ([Object? reviver(Object? key, Object? value)?])

Constructs a new JsonDecoder.

const

Properties

hashCode → int

The hash code for this object.

no setterinherited

runtimeType → Type

A representation of the runtime type of the object.

no setterinherited

Methods

bind (Stream <String > stream) → Stream <Object?>

Transforms the provided stream.

override

cast <RS, RT>() → Converter <RS, RT>

Provides a Converter<RS, RT> view of this stream transformer.

inherited

convert (String input) → dynamic

Converts the given JSON-string input to its corresponding object.

override

fuse <TT>(Converter <Object?, TT> other) → Converter <String , TT>

Fuses this with other.

inherited

noSuchMethod (Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

startChunkedConversion (Sink <Object?> sink) → StringConversionSink

Starts a conversion from a chunked JSON string to its corresponding object.

override

toString () → String

A string representation of this object.

inherited

Operators

operator == (Object other) → bool

The equality operator.

inherited