private MappingElement CreateMappingElementFromExtensionMethod(ITypeSymbol targetType, string methodName)
{
var sourceMethodAccessor = SyntaxFactoryExtensions.CreateMethodAccessExpression((ExpressionSyntax)sourceGlobalAccessor, sourceType.CanBeNull, methodName);
return(new MappingElement()
{
Expression = sourceMethodAccessor,
ExpressionType = new AnnotatedType(targetType)
});
}
private MappingElement TryFindSource(string targetName, MappingContext mappingContext, AnnotatedType accessedVia)
{
//Direct 1-1 mapping
var matchedSourceProperty = sourceProperties.Value
.Where(x => x.Name.Equals(targetName, StringComparison.OrdinalIgnoreCase) || $"{potentialPrefix}{x.Name}".Equals(targetName, StringComparison.OrdinalIgnoreCase))
.FirstOrDefault(p => p.CanBeGet(accessedVia.Type, mappingContext));
if (matchedSourceProperty != null)
{
return(new MappingElement()
{
Expression = SyntaxFactoryExtensions.CreateMemberAccessExpression((ExpressionSyntax)sourceGlobalAccessor, accessedVia.CanBeNull, matchedSourceProperty.Name),
ExpressionType = new AnnotatedType(matchedSourceProperty.Type.Type, accessedVia.CanBeNull || matchedSourceProperty.Type.CanBeNull)
});
}
//Non-direct (mapping like y.UserName = x.User.Name)
var source = FindSubPropertySource(targetName, sourceType.Type, sourceProperties.Value, sourceGlobalAccessor, mappingContext, accessedVia.CanBeNull);
if (source != null)
{
return(source);
}
//Flattening with function eg. t.Total = s.GetTotal()
var matchedSourceMethod = sourceMethods.Value.Where((x => x.Name.EndsWith(targetName, StringComparison.OrdinalIgnoreCase))).FirstOrDefault(m => mappingContext.AccessibilityHelper.IsSymbolAccessible(m, accessedVia.Type));
if (matchedSourceMethod != null)
{
var sourceMethodAccessor = SyntaxFactoryExtensions.CreateMethodAccessExpression((ExpressionSyntax)sourceGlobalAccessor, sourceType.CanBeNull, matchedSourceMethod.Name);
return(new MappingElement()
{
Expression = sourceMethodAccessor,
ExpressionType = new AnnotatedType(matchedSourceMethod.ReturnType, sourceType.CanBeNull || matchedSourceMethod.CanBeNull())
});
}
// HIGHLY SPECULATIVE: Expanding acronyms: UserName = u.Name
if (string.IsNullOrWhiteSpace(potentialPrefix) == false && potentialPrefix == potentialPrefix.ToLowerInvariant() && targetName != potentialPrefix)
{
var acronym = GetAcronym(targetName).ToLowerInvariant();
if (acronym.StartsWith(potentialPrefix))
{
var rest = acronymPattern.Split(targetName).Skip(potentialPrefix.Length);
var newTarget = $"{potentialPrefix}{string.Join("", rest)}";
return(TryFindSource(newTarget, mappingContext, accessedVia));
}
}
return(null);
}