public static ICollection <AbstractSearch> AddCustomSearchCriterion <T>(this ICollection <AbstractSearch> searchCriterias, Expression <Func <T, object> > property)
{
Type propertyType = null;
string fullPropertyPath = GetPropertyPath(property, out propertyType);
AbstractSearch searchCriteria = CreateSearchCriterion(typeof(T), propertyType, fullPropertyPath);
if (searchCriteria != null)
{
searchCriterias.Add(searchCriteria);
}
return(searchCriterias);
}
private static AbstractSearch CreateSearchCriterion(Type targetType, Type propertyType, string property, string term)
{
AbstractSearch result = null;
if (propertyType.IsCollectionType())
{
propertyType = propertyType.GetGenericArguments().First();
}
if (propertyType.Equals(typeof(string)))
{
result = new TextSearch {
SearchTerm = term
};
}
else if (propertyType.Equals(typeof(int)) || propertyType.Equals(typeof(int?)))
{
result = new NumericSearch();
}
else if (propertyType.Equals(typeof(DateTime)) || propertyType.Equals(typeof(DateTime?)))
{
result = new DateSearch();
}
else if (propertyType.IsEnum)
{
result = new EnumSearch(propertyType);
}
if (result != null)
{
result.Property = property;
result.TargetTypeName = targetType.AssemblyQualifiedName;
}
return(result);
}