public static int CalculateTotalCount <T>(this ObjectQuery <T> query, ISearchDataWrapper searchData)
{
int ret = 0;
ObjectQuery qry = query.Build(EntitySQLQueryWrapper.BuildEntitySQLQueryWrapper(searchData), true);
if (qry is ObjectQuery <T> )
{
ret = ((ObjectQuery <T>)qry).Count();
}
else
{
ret = ((ObjectQuery <DbDataRecord>)qry).Count();
}
return(ret);
}
public static EntitySQLQueryWrapper BuildEntitySQLQueryWrapper(SearchCriteriaBase criteria, PagingInfo pagingInfo, SortSequenceBase sortSequence)
{
EntitySQLQueryWrapper ret = new EntitySQLQueryWrapper();
if (criteria != null)
{
ret.FillFromSearchCriteria(criteria);
}
if (sortSequence != null)
{
ret.FillFromSortSequence(sortSequence);
}
if (pagingInfo != null)
{
ret.FillFromPagingInfo(pagingInfo);
}
return(ret);
}
internal void FillQuerySorts(List <EntitySQLSortItem> sorts, EntitySQLQueryWrapper wrapper)
{
IDictionary <EntitySQLFieldNameWithAggregation, int> items = this.PrepareItemsBeforeFilling(wrapper);
if (items != null)
{
foreach (KeyValuePair <EntitySQLFieldNameWithAggregation, int> item in items.OrderBy(x => Math.Abs(x.Value)))
{
if (item.Value > 0)
{
sorts.Add(new EntitySQLSortItem(item.Key.Name, item.Key.AggregationPattern, EntitySQLSortDirection.Ascending));
}
if (item.Value < 0)
{
sorts.Add(new EntitySQLSortItem(item.Key.Name, item.Key.AggregationPattern, EntitySQLSortDirection.Descending));
}
}
}
}
private static ObjectQuery Build <T>(this ObjectQuery <T> query, EntitySQLQueryWrapper items, bool forTotalCount)
{
ObjectQuery ret = null;
ObjectQuery <T> resultQuery = query;
if (items != null)
{
string filters = items.BuildFilterSegment(resultQuery.Name);
if (!String.IsNullOrEmpty(filters))
{
resultQuery = resultQuery.Where(filters);
}
if (items.HasGroup)
{
string groupProjection;
string groupKey = items.BuildGroupSegment(resultQuery.Name, out groupProjection);
ObjectQuery <DbDataRecord> interQuery = resultQuery.GroupBy(groupKey, groupProjection);
if (forTotalCount)
{
ret = interQuery;
}
else
{
interQuery = interQuery.BuildSort(items, true);
interQuery = interQuery.Select(items.GroupBy.BuildEntitySQLSegment(interQuery.Name));
resultQuery = query.Join(interQuery, items.GroupBy.FieldName);
}
}
else if (forTotalCount)
{
ret = resultQuery;
}
if (!forTotalCount)
{
ret = resultQuery.BuildSort(items, !items.HasGroup);
}
}
return(ret);
}
private static ObjectQuery <T> BuildSort <T>(this ObjectQuery <T> query, EntitySQLQueryWrapper items, bool plusPaging)
{
ObjectQuery <T> ret = query;
string sorts = items.BuildSortSegment(ret.Name);
if (!String.IsNullOrEmpty(sorts))
{
if (plusPaging && (items.StartIndex.GetValueOrDefault() > 0))
{
ret = ret.Skip(sorts, items.StartIndex.ToString());
}
else
{
ret = ret.OrderBy(sorts);
}
}
if (plusPaging && items.Count.HasValue)
{
ret = ret.Top(items.Count.ToString());
}
return(ret);
}
internal protected virtual void FillQueryFilters(List <EntitySQLFilterItem> filters, EntitySQLQueryWrapper wrapper)
{
}
public static ObjectQuery <T> BuildForResult <T>(this ObjectQuery <T> query, ISearchDataWrapper searchData)
{
return((ObjectQuery <T>)query.Build(EntitySQLQueryWrapper.BuildEntitySQLQueryWrapper(searchData), false));
}
protected virtual void AddDefaultItems(IDictionary <EntitySQLFieldNameWithAggregation, int> items, EntitySQLQueryWrapper wrapper)
{
}
protected virtual IDictionary <EntitySQLFieldNameWithAggregation, int> PrepareItemsBeforeFilling(EntitySQLQueryWrapper wrapper)
{
IDictionary <EntitySQLFieldNameWithAggregation, int> ret = new Dictionary <EntitySQLFieldNameWithAggregation, int>(this.Items);
if (ret.Count <= 0)
{
this.AddDefaultItems(ret, wrapper);
}
return(ret);
}