public static Collections.VirtualList <TEntity> ToVirtualResultLazy <TEntity>(this Colosoft.Query.Queryable queryable, int pageSize = 0, string countExpression = null, string uiContext = null, Colosoft.Query.IQueryResultBindStrategy bindStrategy = null, Colosoft.Query.IQueryResultObjectCreator objectCreator = null) where TEntity : class
{
queryable.Require("queryable").NotNull();
Collections.VirtualListLoader <TEntity> virtualListLoader = null;
Colosoft.Query.QueryableExecuterHandler <TEntity> executeSelect = null;
if (bindStrategy == null && objectCreator == null)
{
var ts = Colosoft.Query.TypeBindStrategyCache.GetItem(typeof(TEntity), t => new Colosoft.Query.QueryResultObjectCreator(t));
objectCreator = ts;
bindStrategy = ts;
}
if (bindStrategy == null)
{
bindStrategy = new Colosoft.Query.TypeBindStrategy(typeof(TEntity), objectCreator);
}
var queryable2 = (Colosoft.Query.Queryable)queryable.Clone();
if (typeof(Colosoft.Business.IEntity).IsAssignableFrom(typeof(TEntity)))
{
virtualListLoader = Colosoft.Business.EntityManager.Instance.GetEntityVirtualListLoader <TEntity>(queryable2, countExpression, true, uiContext, null);
executeSelect = (queryable3, dataSource, bindStrategy1, objectCreator1) => queryable3.ExecuteSelectProcessLazyResult <TEntity>(uiContext, null, bindStrategy1, objectCreator1);
}
else
{
virtualListLoader = new Colosoft.Business.QueryableVirtualListLoader <TEntity>(queryable2, countExpression, bindStrategy, objectCreator, null);
}
return(new Business.QueryableVirtualList <TEntity>(queryable2, pageSize, virtualListLoader, executeSelect, null, bindStrategy, objectCreator));
}
public static Collections.VirtualList <TProxy> ToProxyVirtualResult <TEntity, TProxy>(this Colosoft.Query.Queryable queryable, int pageSize = 0, string countExpression = null, Func <TEntity, TProxy> proxyCreator = null) where TEntity : new()
{
queryable.Require("queryable").NotNull();
var queryable2 = (Colosoft.Query.Queryable)queryable.Clone();
var bindStrategy = Colosoft.Query.TypeBindStrategyCache.GetItem(typeof(TEntity), f => new Colosoft.Query.QueryResultObjectCreator(() => new TEntity()));
var objectCreator = bindStrategy;
return(new Business.QueryableVirtualList <TProxy>(queryable2, pageSize, new Colosoft.Business.QueryableVirtualListLoader <TProxy>(queryable2, countExpression, bindStrategy, bindStrategy, proxyCreator != null ? new Func <object, TProxy>(f => proxyCreator((TEntity)f)) : null), null, null, bindStrategy, objectCreator));
}
public static Collections.VirtualList <TEntity> ToVirtualResultLazy <TEntity>(this Colosoft.Query.Queryable queryable, int pageSize, Collections.VirtualListLoader <TEntity> listLoader, Colosoft.Query.IQueryResultBindStrategy bindStrategy = null, Colosoft.Query.IQueryResultObjectCreator objectCreator = null) where TEntity : class
{
queryable.Require("queryable").NotNull();
var queryable2 = (Colosoft.Query.Queryable)queryable.Clone();
Colosoft.Query.QueryableExecuterHandler <TEntity> executeSelect = null;
if (typeof(Colosoft.Business.IEntity).IsAssignableFrom(typeof(TEntity)))
{
executeSelect = (queryable3, dataSource, bindStragety1, objectCreator1) => queryable3.ExecuteSelectProcessLazyResult <TEntity>(null, null, bindStragety1, objectCreator1);
}
return(new Business.QueryableVirtualList <TEntity>(queryable2, pageSize, listLoader, executeSelect, null, bindStrategy, objectCreator));
}
/// <summary>
/// Método usado para recupera os dados para o preenchimento da lista virtual.
/// </summary>
/// <param name="virtualList"></param>
/// <param name="startRow"></param>
/// <param name="pageSize"></param>
/// <param name="needItemsCount"></param>
/// <param name="referenceObject"></param>
/// <returns></returns>
public override VirtualListLoaderResult <TEntity> Load(IObservableCollection virtualList, int startRow, int pageSize, bool needItemsCount, object referenceObject = null)
{
var countQuery = (Colosoft.Query.Queryable)_queryable.Clone();
if (_countExpression != null)
{
countQuery.Count(_countExpression);
}
else
{
countQuery.Count();
}
countQuery.Sort = null;
if (needItemsCount)
{
return(new VirtualListLoaderResult <TEntity>(null, ExecuteCount(countQuery)));
}
var sourceContext = _queryable.SourceContext;
var queryable2 = ((Colosoft.Query.Queryable)_queryable.Clone()).Skip(startRow).Take(pageSize);
IEnumerable <IEntity> result = null;
if (_isLazy)
{
result = _entityLoader.GetLazyEntities(queryable2.Execute(), sourceContext, _uiContext, _entityTypeManager);
}
else
{
var preparedQuery = Colosoft.Business.EntityManager.Instance.Prepare <TEntity>(queryable2, sourceContext, _uiContext);
result = _entityLoader.GetFullEntities(preparedQuery, _queryable.SourceContext);
}
if (CastHandler != null)
{
result = result.Select(f => CastHandler(f));
}
return(new VirtualListLoaderResult <TEntity>(result.Select(f => (TEntity)f)));
}
/// <summary>
/// Método usado para recupera os dados para o preenchimento da lista virtual.
/// </summary>
/// <param name="virtualList"></param>
/// <param name="startRow"></param>
/// <param name="pageSize"></param>
/// <param name="needItemsCount"></param>
/// <param name="referenceObject"></param>
/// <returns></returns>
public override VirtualListLoaderResult <T> Load(IObservableCollection virtualList, int startRow, int pageSize, bool needItemsCount, object referenceObject = null)
{
var countQuery = (Colosoft.Query.Queryable)_queryable.Clone();
countQuery.NestedQueries.Clear();
if (_countExpression != null)
{
countQuery = countQuery.Count(_countExpression);
}
else
{
countQuery = countQuery.Count();
}
countQuery.Sort = null;
if (needItemsCount)
{
return(new VirtualListLoaderResult <T>(null, ExecuteCount(countQuery)));
}
var multiQuery = _queryable.SourceContext.CreateMultiQuery();
IEnumerable <T> result = null;
var queryable2 = ((Colosoft.Query.Queryable)_queryable.Clone()).Skip(startRow).Take(pageSize);
if (_bindStrategy == null && _objectCreator == null)
{
multiQuery.Add <T>(queryable2, (mq, q, r) => {
var items = new List <T>();
foreach (var i in r)
{
if (i is IConnectedEntity)
{
((IConnectedEntity)i).Connect(mq.SourceContext);
}
items.Add(i);
}
result = items;
});
}
else
{
multiQuery.Add(queryable2, (mq, q, r) => {
var items = new List <T>();
if (CastHandler == null)
{
foreach (var item in r)
{
if (item is IConnectedEntity)
{
((IConnectedEntity)item).Connect(mq.SourceContext);
}
items.Add((T)item);
}
}
else
{
foreach (var item in r)
{
if (item is IConnectedEntity)
{
((IConnectedEntity)item).Connect(mq.SourceContext);
}
items.Add(CastHandler(item));
}
}
result = items;
}, _bindStrategy, _objectCreator);
}
multiQuery.Execute();
return(new VirtualListLoaderResult <T>(result));
}
