/// <summary>
/// Emits the property values filtered by the given keyvalue filter.
/// </summary>
/// <typeparam name="TKey">The type of the keys.</typeparam>
/// <typeparam name="TValue">The type of the values.</typeparam>
/// <param name="Properties">An object implementing IReadOnlyProperties<TKey, TValue>.</param>
/// <param name="KeyValueFilter">An optional delegate for keyvalue filtering.</param>
/// <returns>The property values of the given property keys.</returns>
public static PropertiesPipe <TKey, TValue> Ps <TKey, TValue>(this IReadOnlyProperties <TKey, TValue> Properties,
KeyValueFilter <TKey, TValue> KeyValueFilter)
where TKey : IEquatable <TKey>, IComparable <TKey>, IComparable
{
return(new PropertiesPipe <TKey, TValue>(Properties, KeyValueFilter));
}
public static bool TryGetValue <T>(this IReadOnlyProperties <string, object> properties, string name, out T value)
{
var exists = properties.TryGetValue(name, out var result);
value = exists && result != null ? (T)result : default;
return(exists);
}
/// <summary>
/// Emits the property values of the given property keys (OR-logic).
/// </summary>
/// <typeparam name="TKey">The type of the keys.</typeparam>
/// <typeparam name="TValue">The type of the values.</typeparam>
/// <param name="Properties">An object implementing IReadOnlyProperties<TKey, TValue>.</param>
/// <param name="Keys">An array of property keys.</param>
/// <returns>The property values of the given property keys.</returns>
public static PropertiesPipe <TKey, TValue> Ps <TKey, TValue>(this IReadOnlyProperties <TKey, TValue> Properties,
params TKey[] Keys)
where TKey : IEquatable <TKey>, IComparable <TKey>, IComparable
{
return(new PropertiesPipe <TKey, TValue>(Properties, Keys: Keys));
}
/// <summary>
/// Emits the property values filtered by the given keyvalue filter.
/// </summary>
/// <param name="SourcePipe">A pipe as element source.</param>
/// <param name="KeyValueFilter">An optional delegate for keyvalue filtering.</param>
public PropertiesPipe(IReadOnlyProperties <TKey, TValue> SourceElement,
KeyValueFilter <TKey, TValue> KeyValueFilter)
: base(SourceElement)
{
this.KeyValueFilter = (KeyValueFilter != null) ? KeyValueFilter : (k, v) => true;
}
/// <summary>
/// Emits the property values of the given property keys (OR-logic).
/// </summary>
/// <param name="SourcePipe">A pipe as element source.</param>
/// <param name="Keys">The property keys.</param>
/// <returns>The property values of the given property keys.</returns>
public PropertiesPipe(IReadOnlyProperties <TKey, TValue> SourceElement,
params TKey[] Keys)
: base(SourceElement)
{
this.Keys = Keys;
}
/// <summary>
/// Emits the property values of the given property keys (OR-logic).
/// </summary>
/// <typeparam name="TKey">The type of the keys.</typeparam>
/// <typeparam name="TValue">The type of the values.</typeparam>
/// <param name="Properties">An object implementing IReadOnlyProperties<TKey, TValue>.</param>
/// <param name="Keys">An array of property keys.</param>
/// <returns>The property values of the given property keys.</returns>
public static IDictionary <TKey, IEnumerable <TValue> > PMap <TKey, TValue>(this IReadOnlyProperties <TKey, TValue> Properties,
params TKey[] Keys)
where TKey : IEquatable <TKey>, IComparable <TKey>, IComparable
{
var _Lookup = new Dictionary <TKey, IEnumerable <TValue> >();
foreach (var Key in Keys)
{
_Lookup.Add(Key, new List <TValue>()
{
Properties[Key]
});
}
return(_Lookup);
}
/// <summary>
/// Emits the property values filtered by the given keyvalue filter.
/// </summary>
/// <typeparam name="TKey">The type of the keys.</typeparam>
/// <typeparam name="TValue">The type of the values.</typeparam>
/// <param name="Properties">An object implementing IReadOnlyProperties<TKey, TValue>.</param>
/// <param name="KeyValueFilter">An optional delegate for keyvalue filtering.</param>
/// <returns>The property values of the given property keys.</returns>
public static IDictionary <TKey, IEnumerable <TValue> > PMap <TKey, TValue>(this IReadOnlyProperties <TKey, TValue> Properties,
KeyValueFilter <TKey, TValue> KeyValueFilter)
where TKey : IEquatable <TKey>, IComparable <TKey>, IComparable
{
var _Lookup = new Dictionary <TKey, IEnumerable <TValue> >();
foreach (var Property in Properties)
{
if (KeyValueFilter(Property.Key, Property.Value))
{
_Lookup.Add(Property.Key, new List <TValue>()
{
Property.Value
});
}
}
return(_Lookup);
}
public static TResult SafeGet <TResult>(this IReadOnlyProperties <string, object> properties, string name)
{
var exists = properties.TryGetValue <TResult>(name, out var value);
return(exists ? value : default);
