OracleVectorToDoubleArrayPropertyHandler

A property handler that maps the Oracle VECTOR type into a double array property.

A property handler that maps the Oracle VECTOR type into a double array property.

Overview

Conversions

Exceptions

Usability

Bind the handler to the property that maps to a VECTOR column.

Attribute

public class Embedding
{
    public int Id { get; set; }

    [Map("vector"), PropertyHandler(typeof(OracleVectorToDoubleArrayPropertyHandler))]
    public double[] Vector { get; set; }
}

Once bound, the library invokes the handler automatically when the property is read or written.

using (var connection = new OracleConnection(connectionString))
{
    connection.Insert(new Embedding { Id = 1, Vector = new double[] { 1.5, 2.5, 3.5 } });
    var embedding = connection.Query<Embedding>(e => e.Id == 1).First();
}

Fluent Mapping

To configure via FluentMapper:

FluentMapper
    .Entity<Embedding>()
    .PropertyHandler<OracleVectorToDoubleArrayPropertyHandler>(e => e.Vector);

Property Level Mapping

To configure via PropertyHandlerMapper:

PropertyHandlerMapper.Add<Embedding, OracleVectorToDoubleArrayPropertyHandler>(e => e.Vector, new OracleVectorToDoubleArrayPropertyHandler(), true);

Type Level Mapping

To apply the handler to every property of the type double[]:

PropertyHandlerMapper.Add<double[], OracleVectorToDoubleArrayPropertyHandler>(new OracleVectorToDoubleArrayPropertyHandler(), true);

A type level mapping is process-wide: it is applied to every double[] property of every entity and connection, not only to the intended column. Prefer the attribute, fluent or property level mapping unless every double[] property maps to a VECTOR column.

See Also

• OracleVectorToFloatArrayPropertyHandler