/// <summary>
/// Gets the <see cref="Maybe{TResult}"/> of the projection function <paramref name="func"/>.
/// </summary>
/// <typeparam name="TResult">The type of the projected result.</typeparam>
/// <param name="func">The projection function.</param>
/// <returns>The projected maybe.</returns>
public Maybe <TResult> Some <TResult>(Func <T, TResult> func)
where TResult : class
{
MaybeUtils.CheckArgumentNotNull(func, nameof(func));
var lMaybe = Maybe.None <TResult>();
this.Do(x => lMaybe = Maybe.Some(func(x)));
return(lMaybe);
}
/// <summary>
/// Gets the <see cref="MaybeStruct{TResult}"/> of the projection function <paramref name="func"/>.
/// </summary>
/// <typeparam name="TResult">The type of the projected result.</typeparam>
/// <param name="func">The projection function.</param>
/// <returns>The projected maybe.</returns>
public MaybeStruct <TResult> SomeStruct <TResult>(Func <T, MaybeStruct <TResult> > func)
where TResult : struct
{
MaybeUtils.CheckArgumentNotNull(func, nameof(func));
var lMaybe = Maybe.NoneStruct <TResult>();
this.Do(x => lMaybe = func(x));
return(lMaybe);
}
/// <summary>
/// Executes <paramref name="doAction"/> if value is not null.
/// </summary>
/// <param name="doAction">The action which is performed if maybe is not none.</param>
/// <returns>The none case.</returns>
public NoneCase Do(Action <T> doAction)
{
MaybeUtils.CheckArgumentNotNull(doAction, nameof(doAction));
if (this.value != null)
{
doAction(this.value);
return(new NoneCase(false));
}
return(new NoneCase(true));
}
/// <summary>
/// Returns the value in case it is initialized.
/// Otherwise throws an <see cref="InvalidOperationException"/>.
/// </summary>
/// <param name="maybeParameterName">The maybe reference used in error message.</param>
/// <param name="additionalMessage">Additional error message.</param>
/// <returns>The value.</returns>
public T ValueOrException(
string maybeParameterName = "",
string additionalMessage = "")
{
var parameterName = maybeParameterName;
if (string.IsNullOrEmpty(maybeParameterName))
{
parameterName = typeof(T).Name;
}
return(MaybeUtils.CheckParameterNotNull(this.value, parameterName, additionalMessage));
}
/// <summary>
/// Initializes a new instance of the <see cref="Maybe{T}"/> struct.
/// Constructor used for deserialization.
/// </summary>
/// <param name="info">The serialization info.</param>
/// <param name="context">The streaming context.</param>
internal Maybe(SerializationInfo info, StreamingContext context)
{
this.value = MaybeUtils.GetDeserializedValue <T>(info, nameof(this.value));
}
/// <inheritdoc/>
public void GetObjectData(SerializationInfo info, StreamingContext context)
{
MaybeUtils.SetData(info, nameof(this.value), this.value);
}
/// <summary>
/// Returns the value in case it is initialized.
/// Otherwise throws an <see cref="InvalidOperationException"/>.
/// </summary>
/// <param name="maybeParameterName">The maybe reference used in error message.</param>
/// <param name="additionalMessage">Additional error message.</param>
/// <returns>The value.</returns>
public T ValueOrException(
string maybeParameterName,
string additionalMessage = "")
{
return(MaybeUtils.CheckParameterNotNull(this.value, maybeParameterName, additionalMessage));
}
/// <summary>
/// Sets <paramref name="data"/> to serialization info.
/// </summary>
/// <typeparam name="T">The data's type.</typeparam>
/// <param name="info">The serialization info.</param>
/// <param name="key">The data's key.</param>
/// <param name="data">The data.</param>
internal static void SetData <T>(SerializationInfo info, string key, T data)
{
MaybeUtils.CheckArgumentNotNull(info, nameof(info));
info.AddValue(key, data, typeof(T));
}