Class FastOptionalTypeParser<TOpt, T>

Namespace

Rinku.Mapping.Parsers.Defaults

Assembly

Rinku.dll

Builds an optional value with a row delegate that does not advance the reader.

public sealed class FastOptionalTypeParser<TOpt, T> : BaseTypeParser<TOpt>, ISimpleParser<TOpt>, ISimpleParser, IStepParser<TOpt>, ITypeParser<TOpt>, ITypeParser, IDisposable where TOpt : struct, IWrapping<TOpt, T>

Type Parameters

TOpt

T

Inheritance

object

BaseTypeParser<TOpt>

FastOptionalTypeParser<TOpt, T>

Implements

ISimpleParser<TOpt>

ISimpleParser

IStepParser<TOpt>

ITypeParser<TOpt>

ITypeParser

IDisposable

Inherited Members

BaseTypeParser<TOpt>.Dispose()

BaseTypeParser<TOpt>.Query(DbCommand, bool)

BaseTypeParser<TOpt>.Query(IDbCommand, bool)

BaseTypeParser<TOpt>.QueryAsync(DbCommand, bool, CancellationToken)

BaseTypeParser<TOpt>.QueryAsync(IDbCommand, bool, CancellationToken)

BaseTypeParser<TOpt>.Query(DbCommand, ICache, bool)

BaseTypeParser<TOpt>.Query(IDbCommand, ICache, bool)

BaseTypeParser<TOpt>.QueryAsync(DbCommand, ICache, bool, CancellationToken)

BaseTypeParser<TOpt>.QueryAsync(IDbCommand, ICache, bool, CancellationToken)

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Extension Methods

Caster.Parse<T>(object?)

Constructors

FastOptionalTypeParser(CommandBehavior, Func<DbDataReader, T>, ITypeParser)

Builds an optional value with a row delegate that does not advance the reader.

public FastOptionalTypeParser(CommandBehavior behavior, Func<DbDataReader, T> parser, ITypeParser schemaParser)

Parameters

behavior CommandBehavior

parser Func<DbDataReader, T>

schemaParser ITypeParser

Properties

Behavior

The reader behavior this parser wants, passed to ExecuteReader(CommandBehavior).

public override CommandBehavior Behavior { get; }

Property Value

CommandBehavior

Remarks

Often SequentialAccess or SingleResult.

RowParser

Gets the delegate that reads the current row without advancing the reader.

public Func<DbDataReader, TOpt> RowParser { get; }

Property Value

Func<DbDataReader, TOpt>

Methods

CanParse(ColumnInfo[])

Whether this parser can read a result carrying schema.

public override bool CanParse(ColumnInfo[] schema)

Parameters

schema ColumnInfo[]

Returns

bool

Remarks

A parser may accept several schemas. A parser that reads names and types at each call may accept every schema.

Default()

The value to return when the result has no row, an empty collection or optional, for instance.

public override TOpt Default()

Returns

TOpt

Parse(DbDataReader)

Parses one T starting at the current row, advancing the reader as it goes. CanContinue reports the state of the reader on return, true when it is positioned on an untreated row, false when no row is left

public override (bool CanContinue, TOpt Result) Parse(DbDataReader reader)

Parameters

reader DbDataReader

Returns

(bool CanContinue, TOpt Result)

ParseAsync(DbDataReader, CancellationToken)

Parses one T starting at the current row, advancing the reader as it goes. CanContinue reports the state of the reader on return, true when it is positioned on an untreated row, false when no row is left

public override ValueTask<(bool CanContinue, TOpt Result)> ParseAsync(DbDataReader reader, CancellationToken ct = default)

Parameters

reader DbDataReader

ct CancellationToken

Returns

ValueTask<(bool CanContinue, TOpt Result)>