void ISearchValueVisitor.Visit(UriSearchValue uri)
{
EnsureArg.IsNotNull(uri, nameof(uri));
switch (_modifier)
{
case null:
_outputExpression = Expression.Equals(FieldName.Uri, _componentIndex, uri.Uri);
break;
case SearchModifierCode.Above:
_outputExpression = Expression.And(
Expression.EndsWith(FieldName.Uri, _componentIndex, uri.Uri, false),
Expression.NotStartsWith(FieldName.Uri, _componentIndex, KnownUriSchemes.Urn, false));
break;
case SearchModifierCode.Below:
_outputExpression = Expression.And(
Expression.StartsWith(FieldName.Uri, _componentIndex, uri.Uri, false),
Expression.NotStartsWith(FieldName.Uri, _componentIndex, KnownUriSchemes.Urn, false));
break;
default:
ThrowModifierNotSupported();
break;
}
}
void ISearchValueVisitor.Visit(StringSearchValue s)
{
EnsureArg.IsNotNull(s, nameof(s));
EnsureOnlyEqualComparatorIsSupported();
if (_modifier == null)
{
// Based on spec http://hl7.org/fhir/STU3/search.html#string,
// is case-insensitive search so we will normalize into lower case for search.
_outputExpression = Expression.StartsWith(FieldName.String, _componentIndex, s.String, true);
}
else if (_modifier == SearchModifierCode.Exact)
{
_outputExpression = Expression.StringEquals(FieldName.String, _componentIndex, s.String, false);
}
else if (_modifier == SearchModifierCode.Contains)
{
// Based on spec http://hl7.org/fhir/STU3/search.html#modifiers,
// contains is case-insensitive search so we will normalize into lower case for search.
_outputExpression = Expression.Contains(FieldName.String, _componentIndex, s.String, true);
}
else
{
ThrowModifierNotSupported();
}
}
