internal static Expression GetEntrySetProjection(EntryObjects.EntrySet entrySet)
{
Type type = ((IQueryable)entrySet).ElementType;
string filterType = type.AssertGetAttribute <System.DirectoryServices.Linq.Attributes.DirectoryTypeAttribute>().Name;
List <MemberBinding> bindings = new List <MemberBinding>();
List <LdapAttributeExpression> attributes = new List <LdapAttributeExpression>();
foreach (MemberInfo memberInfo in GetMappedMembers(type))
{
string attributeName = GetAttributeName(memberInfo);
Type memberType = GetMemberType(memberInfo);
// if (property.CanWrite && result.Properties.Contains(attributeName))
var attributeExpression = new LdapAttributeExpression(memberType, attributeName);
bindings.Add(Expression.Bind(memberInfo, attributeExpression));
attributes.Add(attributeExpression);
}
Expression projector = Expression.MemberInit(Expression.New(type), bindings);
Type resultType = (typeof(IEnumerable <>).MakeGenericType(type));
// Set the filter to include the object class
Expression filter = Expression.Equal(
new LdapAttributeExpression(typeof(string), "ObjectClass"),
Expression.Constant(filterType)
);
DirectoryEntry searchRoot = entrySet.RootEntry;
SearchScope scope = SearchScope.Subtree;
if (entrySet.Scope.HasValue)
{
scope = entrySet.Scope.Value;
}
return(new ProjectionExpression(
new DirectorySearcherExpression(
resultType,
searchRoot,
attributes,
filter,
scope,
null,
null,
null
),
projector,
null
));
}
protected override Expression VisitAttribute(LdapAttributeExpression node)
{
var getattributemethod = getattributemethodgenericness.MakeGenericMethod(node.Type);
return(Expression.Call(getattributemethod, _parameterExpression, Expression.Constant(node.Name)));
}
protected override Expression VisitAttribute(LdapAttributeExpression node)
{
_sb.Append(node.Name);
return(node);
}
protected virtual Expression VisitAttribute(LdapAttributeExpression node)
{
return(node);
}