public override bool IsNull(ISpmContext context, int index)
{
SpmItem <TValue> itemReader = (SpmItem <TValue>)context[this.propertyToken];
if (itemReader == null)
{
itemReader = new SpmItem <TValue>(context, this.Mapped, null);
context[this.propertyToken] = itemReader;
}
return(itemReader.IsKeysNull());
}
public override void Read(ISpmContext context, int index, TItem dest)
{
SpmItem <TValue> itemReader = (SpmItem <TValue>)context[this.propertyToken];
if (itemReader == null)
{
itemReader = new SpmItem <TValue>(context, this.Mapped, null);
context[this.propertyToken] = itemReader;
}
this.setter(dest, itemReader.Read());
}
public override void Read(ISpmContext context, int index, TItem dest)
{
if (context.DataReader.IsDBNull(index))
{
this.setter(dest, null);
}
else
{
this.setter(dest, read(context.DataReader, index));
}
}
public SpmItem(ISpmContext readContext, SpmAttribute mappedHolder, string group)
{
if (readContext == null)
{
throw new ArgumentNullException("itemReader");
}
this.context = readContext;
this.MappedHolder = mappedHolder;
ReadOnlyCollection <ISpmAccessor <TItem> > coll = SpmAccessors <TItem> .Collection;
this.accessors = new List <SprIndexedAccessor>(coll.Count);
this.keys = new List <SprIndexedAccessor>(4);
for (int i = 0; i < coll.Count; i++)
{
ISpmAccessor <TItem> accessor = coll[i];
if (accessor.Mapped.InGroup(group))
{
string[] colNames = accessor.Mapped.Columns;
int index = -1;
for (int j = 0; j < colNames.Length; j++)
{
string colName = colNames[j];
if (colName.StartsWith("/"))
{
if (this.MappedHolder == null || !this.MappedHolder.HasSynonyms)
{
throw new ArgumentException(String.Concat("Не заданы родительские синонимы для", colNames[j]));
}
if (String.IsNullOrEmpty((colName = this.MappedHolder.GetSynonim(colName.Substring(1)))))
{
throw new ArgumentException(String.Concat("Не найдена ссылка на родительский синоним ", colNames[j]));
}
}
if ((index = this.context.TryGetIndex(colName)) >= 0)
{
break;
}
}
if (index < 0 && colNames.Length > 0)
{
throw new ArgumentException(String.Concat("В результате запроса не найдено хотя бы одно из полей: ",
String.Join(", ", colNames)));
}
SprIndexedAccessor indexedAccessor = new SprIndexedAccessor(index, accessor);
this.accessors.Add(indexedAccessor);
if (accessor.Mapped.Key)
{
keys.Add(indexedAccessor);
}
}
}
this.accessors.TrimExcess();
if (mappedHolder != null && mappedHolder.Shared)
{
this.sharedItems = readContext.SharedPool.Get <TItem>(mappedHolder.ShareId, out this.extendable);
if (this.sharedItems == null)
{
this.sharedItems = new Dictionary <TItem, TItem>(10);
readContext.SharedPool.Set(mappedHolder.ShareId, this.sharedItems, true);
this.extendable = true;
}
else
if (this.keys.Count == 0 && !this.extendable)
{
throw new ArgumentException("Не заданы ключи для использования фиксированного пула элементов.");
}
this.sharedItem = new TItem();
}
}
public override void Read(ISpmContext context, int index, TItem dest)
{
this.setter(dest, context.DataReader.IsDBNull(index) ?
default(TValue) : read(context.DataReader, index));
}
public virtual bool IsNull(ISpmContext context, int index)
{
return(context.DataReader.IsDBNull(index));
}
public abstract void Read(ISpmContext context, int index, TItem dest);
