/// <summary>
/// Set the computed value to the <see cref="DateTime.Now"/> value when the request is made.
/// </summary>
/// <typeparam name="TPropertyConfiguration">The type of the property configuration.</typeparam>
/// <param name="builder">The property configuration builder instance.</param>
/// <returns>The property configuration builder instance.</returns>
public static IPropertyConfigurationBuilder <DateTime, TPropertyConfiguration> DateTimeNow <TPropertyConfiguration>(
this IComputedValueBuilder <DateTime, TPropertyConfiguration> builder)
where TPropertyConfiguration : IPropertyConfiguration
{
builder.PropertyConfiguration.ValueComputationFunc.ValueComputationFunc = () => DateTime.Now;
return(builder as IPropertyConfigurationBuilder <DateTime, TPropertyConfiguration>);
}
/// <summary>
/// Set the value of the property to a randomly generated GUID.
/// </summary>
/// <typeparam name="TPropertyConfiguration">The type of the property configuration.</typeparam>
/// <param name="builder">The property configuration builder instance.</param>
/// <returns>The property configuration builder instance.</returns>
public static IPropertyConfigurationBuilder <Guid?, TPropertyConfiguration> RandomlyGeneratedGuid <TPropertyConfiguration>(
this IComputedValueBuilder <Guid?, TPropertyConfiguration> builder)
where TPropertyConfiguration : IInMemoryPropertyConfiguration
{
builder.PropertyConfiguration.ValueComputationFunc.ValueComputationFunc = () => Guid.NewGuid();
// Any property that has a computed value is by definition not read-only, so explicitly enforce this
var propertyBuilder = builder as IPropertyConfigurationBuilder <Guid?, TPropertyConfiguration>;
propertyBuilder.IsReadOnly(false);
return(propertyBuilder);
}
/// <summary>
/// Set the value of the property to a global auto-incrementing integer. This is shared accross all properties that use this method.
/// </summary>
/// <typeparam name="TPropertyConfiguration">The type of the property configuration.</typeparam>
/// <param name="builder">The property configuration builder instance.</param>
/// <returns>The property configuration builder instance.</returns>
public static IPropertyConfigurationBuilder <int, TPropertyConfiguration> AutoIncrementingInteger <TPropertyConfiguration>(
this IComputedValueBuilder <int, TPropertyConfiguration> builder)
where TPropertyConfiguration : IInMemoryPropertyConfiguration
{
builder.PropertyConfiguration.ValueComputationFunc.ValueComputationFunc = () => Interlocked.Increment(ref _globalPrimaryKey);
// Any property that has a computed value is by definition not read-only, so explicitly enforce this
var propertyBuilder = builder as IPropertyConfigurationBuilder <int, TPropertyConfiguration>;
propertyBuilder.IsReadOnly(false);
return(propertyBuilder);
}
/// <summary>
/// Set the computed value to the specified value when the request is made.
/// </summary>
/// <typeparam name="TProperty">The type of the property to set the value of.</typeparam>
/// <typeparam name="TPropertyConfiguration">The type of the property configuration.</typeparam>
/// <param name="builder">The property configuration builder instance.</param>
/// <param name="computationFunc">The func to apply to the property to generate the value that will be persisted.</param>
/// <returns>The property configuration builder instance.</returns>
public static IPropertyConfigurationBuilder <TProperty, TPropertyConfiguration> Custom <TProperty, TPropertyConfiguration>(
this IComputedValueBuilder <TProperty, TPropertyConfiguration> builder,
Expression <Func <TProperty> > computationFunc)
where TPropertyConfiguration : IPropertyConfiguration
{
builder.PropertyConfiguration.ValueComputationFunc.ValueComputationFunc = Expression.Lambda <Func <object> >(Expression.Convert(computationFunc.Body, typeof(object)));
// Any property that has a computed value is by definition not read-only, so explicitly enforce this
var propertyBuilder = builder as IPropertyConfigurationBuilder <TProperty, TPropertyConfiguration>;
propertyBuilder.IsReadOnly(false);
return(propertyBuilder);
}
