protected internal Expression CompileAccessorExpression(Expression target, string clientExpr, Action <List <Expression> > customizeProgression = null, bool liftToNullable = false)
{
var customResult = CustomAccessorCompilers.TryCompile(target, clientExpr);
if (customResult != null)
{
return(customResult);
}
var progression = new List <Expression> {
target
};
var clientExprItems = clientExpr.Split('.');
var currentTarget = target;
for (var i = 0; i < clientExprItems.Length; i++)
{
var clientExprItem = clientExprItems[i];
if (i == 0 && clientExprItem == "this")
{
continue;
}
if (Utils.IsNullable(currentTarget.Type))
{
clientExprItem = "Value";
i--;
}
if (currentTarget.Type == typeof(ExpandoObject))
{
currentTarget = ReadExpando(currentTarget, clientExprItem);
}
//denglf
//else if(DynamicBindingHelper.ShouldUseDynamicBinding(currentTarget.Type))
// currentTarget = DynamicBindingHelper.CompileGetMember(currentTarget, clientExprItem);
else
{
currentTarget = FixReflectedType(Expression.PropertyOrField(currentTarget, clientExprItem));
}
progression.Add(currentTarget);
}
customizeProgression?.Invoke(progression);
if (_guardNulls && progression.Count > 1 || liftToNullable && progression.Count > 2)
{
var lastIndex = progression.Count - 1;
var last = progression[lastIndex];
if (Utils.CanAssignNull(target.Type) && !Utils.CanAssignNull(last.Type))
{
progression[lastIndex] = Expression.Convert(last, Utils.MakeNullable(last.Type));
}
}
return(CompileNullGuard(progression));
}
public async Task Scenario()
{
try {
CustomAccessorCompilers.Register((target, accessorText) => {
if (accessorText == OID)
{
return(Expression.Property(
Expression.Convert(target, typeof(DCBaseObject)),
OID
));
}
if (accessorText == LOCK_FILED)
{
return(Expression.Call(
Expression.Convert(target, typeof(PersistentBase)),
"GetPropertyValue",
null,
Expression.Constant(LOCK_FILED)
));
}
return(null);
});
var key = Guid.NewGuid();
await UnitOfWorkHelper.ExecAsync(uow => {
uow.Save(new MyComponentImpl(uow)
{
Oid = key,
Value = 123
});
uow.CommitChanges();
IQueryable <IMyComponent> interfaceQuery = uow.Query <MyComponentImpl>();
var loadResult = DataSourceLoader.Load(interfaceQuery, new SampleLoadOptions {
PrimaryKey = new[] { OID },
RemoteSelect = false,
PreSelect = new[] { OID, "Value", LOCK_FILED }
});
var item = loadResult.data.Cast <IDictionary <string, object> >().First();
Assert.Equal(key, item[OID]);
Assert.Equal(123, item["Value"]);
Assert.Equal(0, item[LOCK_FILED]);
});
} finally {
CustomAccessorCompilers.Clear();
}
}
public static void Run(Action action)
{
lock (SYNC) {
try {
action();
} finally {
CustomAggregators.Clear();
CustomAccessorCompilers.Clear();
}
}
}
public static void Run(Action action)
{
lock (SYNC) {
try {
action();
} finally {
CustomAggregators.Clear();
CustomAccessorCompilers.Clear();
DataSourceLoadOptionsBase.StringToLowerDefault = null;
}
}
}
