Codec<T> class final

Converts a typed Dart value to database storage and decodes it on reads.

A codec defines a storage family and symmetric conversion functions. Use nullable for SQL NULL and map for domain-specific Dart types.

Constructors

Codec(String sqlType, T _decode(Object? value), Object? _encode(T value))

Creates an explicit storage codec; conversion errors propagate to callers.

const

Codec.integer(T _decode(Object? value), int encode(T value))

Stores a domain value as a SQL integer.

const

Codec.text(T _decode(Object? value), String encode(T value))

Stores a domain value as SQL text.

const

Properties

acceptsNull → bool

Whether T permits a null Dart result.

no setter

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

sqlType → String

Logical storage family used when rendering and binding SQL.

final

Methods

decode(Object? value) → T

Converts a raw stored value into T.

encode(T value) → Object?

Converts value into a value supported by the SQL driver.

map<R>(R from(T), T to(R)) → Codec<R>

Adds domain conversions while preserving this codec's storage family.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

nullable() → Codec<T?>

Handles SQL NULL before delegating non-null values to this codec.

sameStorageAs(Codec<Object?> other) → bool

Whether two codecs have the same storage and decoding identity. Nullable wrappers preserve identity; independently mapped codecs do not.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited