public InsertOperation(QueryProvider queryProvider, Expression <Func <T> > evaluator)
: base(queryProvider)
{
int memberInitCount = 0;
ParameterExpression parameter = Expression.Parameter(typeof(T));
List <SetDescriptor> descriptors = null;
evaluator.Visit(
delegate(MemberInitExpression ex) {
if (memberInitCount > 0)
{
return(ex);
}
memberInitCount++;
descriptors = new List <SetDescriptor>();
foreach (MemberAssignment assignment in ex.Bindings)
{
var fieldInfo = TypeInfo.Fields.FirstOrDefault(a => a.UnderlyingProperty == assignment.Member);
if (fieldInfo == null)
{
if (assignment.Member.ReflectedType.IsAssignableFrom(TypeInfo.UnderlyingType))
{
var property = TypeInfo.UnderlyingType.GetProperty(assignment.Member.Name);
fieldInfo = TypeInfo.Fields.FirstOrDefault(field => field.UnderlyingProperty == property);
}
}
descriptors.Add(
new SetDescriptor(fieldInfo, parameter, assignment.Expression));
}
return(ex);
});
AddKey(descriptors);
setOperation = new SetOperation <T>(this, descriptors);
}
public BulkUpdateOperation(IUpdatable <T> query)
: base((QueryProvider)((Updatable <T>)query).Query.Provider)
{
var descriptors = new List <SetDescriptor>();
var q = (Updatable <T>)query;
this.query = q.Query;
foreach (var expression in q.Expressions)
{
var lambda = (LambdaExpression)expression.Item1;
Expression ex = lambda.Body;
var ex1 = lambda.Body as UnaryExpression;
if (ex1 != null && ex1.NodeType == ExpressionType.Convert)
{
ex = ex1.Operand;
}
var member = (PropertyInfo)((MemberExpression)ex).Member;
lambda = (LambdaExpression)expression.Item2;
var propertyInfo = TypeInfo.Fields.FirstOrDefault(a => a.UnderlyingProperty == member);
if (propertyInfo == null)
{
if (member.ReflectedType.IsAssignableFrom(TypeInfo.UnderlyingType))
{
member = TypeInfo.UnderlyingType.GetProperty(member.Name);
propertyInfo = TypeInfo.Fields.FirstOrDefault(field => field.UnderlyingProperty == member);
}
}
descriptors.Add(
new SetDescriptor(propertyInfo, lambda.Parameters[0], lambda.Body));
}
setOperation = new SetOperation <T>(this, descriptors);
}
public BulkUpdateOperation(IQueryable <T> query, Expression <Func <T, T> > evaluator)
: base((QueryProvider)query.Provider)
{
this.query = query;
var memberInitCount = 0;
var parameter = evaluator.Parameters[0];
List <SetDescriptor> descriptors = null;
evaluator.Visit(
delegate(MemberInitExpression ex) {
if (memberInitCount > 0)
{
return(ex);
}
memberInitCount++;
descriptors = (from MemberAssignment assigment in ex.Bindings
select
new SetDescriptor(
TypeInfo.Fields.First(a => a.UnderlyingProperty == assigment.Member), parameter, assigment.Expression)).
ToList();
return(ex);
});
setOperation = new SetOperation <T>(this, descriptors);
}
public BulkUpdateOperation(IQueryable <T> query, List <SetDescriptor> descriptors)
: base((QueryProvider)query.Provider)
{
this.query = query;
setOperation = new SetOperation <T>(this, descriptors);
}
