/// <summary>
/// Compares the two DDAttributesCollection of the same values and returns an integer that indicates whether the current instance precedes. Very slow
/// </summary>
/// <param name="value1">First DDAttributesCollection to compare</param>
/// <param name="value2">Second DDAttributesCollection to compare</param>
/// <returns>A value that indicates the relative order of the objects being compared. The return value has two meanings:
/// Zero - the both DDAttributesCollection have some items and their values.
/// The difference between the number of elements of the first and second DDAttributes Collection
/// One - values of collection is not equal.</returns>
/// <remarks>The both null object is equal and return value will be Zero. Very slow</remarks>
public static int Compare(DDAttributesCollection value1, DDAttributesCollection value2)
{
if (((object)value1 == null) && ((object)value2 == null))
{
return(0); // if both are null -> return true
}
if (((object)value1 == null) || ((object)value2 == null))
{
return(1); // if only one of them are null -> return false
}
if ((value1.Count != value2.Count))
{
return(value1.Count - value2.Count); // The difference between the number of elements of the first and second DDAttributes Collection
}
foreach (var keyValue1 in value1)
{
if (!value2.Contains(keyValue1.Key))
{
return(-1); //
}
var valueCompareResult = DDValue.Compare(keyValue1.Value, value2[keyValue1.Key]);
if (valueCompareResult != 0)
{
return(valueCompareResult);
}
}
return(0);
}
/// <summary>
/// Determines whether the Attribute Collection contains an elements with the specified names and will be throw new <exception cref="ContainsAttributesException"/> if one of these attributes was not found
/// </summary>
/// <param name="attr">collection of DDValue that can be accessed by name.</param>
/// <param name="names">list of names of mandatory attributes</param>
/// <exception cref="DDMissingSomeOfAttributesException"/>
private static void containsAttributesOtherwiseThrow(this DDAttributesCollection attr, IEnumerable <string> names)
{
var nel = new List <string>();
foreach (var name in names)
{
if (!attr.Contains(name))
{
nel.Add(name);
}
}
if (nel.Count > 0)
{
throw new DDMissingSomeOfAttributesException(nel.ToArray());
}
}