private static Expression HandleGroup(
EntityQueryModelVisitor entityQueryModelVisitor,
GroupResultOperator groupResultOperator,
QueryModel queryModel)
{
var keySelector
= entityQueryModelVisitor
.ReplaceClauseReferences(
groupResultOperator.KeySelector,
queryModel.MainFromClause);
var elementSelector
= entityQueryModelVisitor
.ReplaceClauseReferences(
groupResultOperator.ElementSelector,
queryModel.MainFromClause);
return(Expression.Call(
entityQueryModelVisitor.LinqOperatorProvider.GroupBy
.MakeGenericMethod(
typeof(QuerySourceScope),
groupResultOperator.KeySelector.Type,
groupResultOperator.ElementSelector.Type),
entityQueryModelVisitor.CreateScope(
entityQueryModelVisitor.Expression,
entityQueryModelVisitor.StreamedSequenceInfo.ResultItemType,
queryModel.MainFromClause),
Expression.Lambda(keySelector, EntityQueryModelVisitor.QuerySourceScopeParameter),
Expression.Lambda(elementSelector, EntityQueryModelVisitor.QuerySourceScopeParameter)));
}
private static Expression HandleDefaultIfEmpty(
EntityQueryModelVisitor entityQueryModelVisitor,
DefaultIfEmptyResultOperator defaultIfEmptyResultOperator,
QueryModel queryModel)
{
if (defaultIfEmptyResultOperator.OptionalDefaultValue == null)
{
return(Expression.Call(
entityQueryModelVisitor.LinqOperatorProvider.DefaultIfEmpty
.MakeGenericMethod(entityQueryModelVisitor.Expression.Type.GetSequenceType()),
entityQueryModelVisitor.Expression));
}
var optionalDefaultValue
= entityQueryModelVisitor
.ReplaceClauseReferences(
defaultIfEmptyResultOperator.OptionalDefaultValue,
queryModel.MainFromClause);
return(Expression.Call(
entityQueryModelVisitor.LinqOperatorProvider.DefaultIfEmptyArg
.MakeGenericMethod(entityQueryModelVisitor.Expression.Type.GetSequenceType()),
entityQueryModelVisitor.Expression,
optionalDefaultValue));
}
private static Expression HandleDefaultIfEmpty(
EntityQueryModelVisitor entityQueryModelVisitor,
DefaultIfEmptyResultOperator defaultIfEmptyResultOperator,
QueryModel queryModel)
{
if (defaultIfEmptyResultOperator.OptionalDefaultValue == null)
{
return(Expression.Call(
entityQueryModelVisitor.LinqOperatorProvider.DefaultIfEmpty
.MakeGenericMethod(entityQueryModelVisitor.StreamedSequenceInfo.ResultItemType),
entityQueryModelVisitor.Expression));
}
var optionalDefaultValue
= entityQueryModelVisitor
.ReplaceClauseReferences(
defaultIfEmptyResultOperator.OptionalDefaultValue,
queryModel.MainFromClause);
return(Expression.Call(
entityQueryModelVisitor.LinqOperatorProvider.DefaultIfEmptyArg
.MakeGenericMethod(typeof(QuerySourceScope)),
entityQueryModelVisitor.CreateScope(
entityQueryModelVisitor.Expression,
entityQueryModelVisitor.StreamedSequenceInfo.ResultItemType,
queryModel.MainFromClause),
optionalDefaultValue));
}
private static Expression HandleGroup(
EntityQueryModelVisitor entityQueryModelVisitor,
GroupResultOperator groupResultOperator,
QueryModel queryModel)
{
var sequenceType
= entityQueryModelVisitor.Expression.Type.GetSequenceType();
var keySelector
= entityQueryModelVisitor
.ReplaceClauseReferences(
groupResultOperator.KeySelector,
queryModel.MainFromClause);
var elementSelector
= entityQueryModelVisitor
.ReplaceClauseReferences(
groupResultOperator.ElementSelector,
queryModel.MainFromClause);
var expression
= Expression.Call(
entityQueryModelVisitor.LinqOperatorProvider.GroupBy
.MakeGenericMethod(
sequenceType,
keySelector.Type,
elementSelector.Type),
entityQueryModelVisitor.Expression,
Expression.Lambda(keySelector, entityQueryModelVisitor.CurrentParameter),
Expression.Lambda(elementSelector, entityQueryModelVisitor.CurrentParameter));
entityQueryModelVisitor.CurrentParameter
= Expression.Parameter(sequenceType, groupResultOperator.ItemName);
entityQueryModelVisitor
.AddOrUpdateMapping(groupResultOperator, entityQueryModelVisitor.CurrentParameter);
return(expression);
}
private static Expression HandleContains(
EntityQueryModelVisitor entityQueryModelVisitor,
ContainsResultOperator containsResultOperator,
QueryModel queryModel)
{
var item = entityQueryModelVisitor
.ReplaceClauseReferences(
containsResultOperator.Item,
queryModel.MainFromClause);
return(CallWithPossibleCancellationToken(
entityQueryModelVisitor.LinqOperatorProvider.Contains
.MakeGenericMethod(entityQueryModelVisitor.StreamedSequenceInfo.ResultItemType),
entityQueryModelVisitor.Expression,
item));
}
private Expression ReplaceClauseReferences(Expression expression)
{
var isNestedQuery = _parentQueryModelVisitor != null;
var resultExpression
= ReferenceReplacingExpressionTreeVisitor
.ReplaceClauseReferences(
expression,
_querySourceMapping,
throwOnUnmappedReferences: !isNestedQuery);
if (isNestedQuery)
{
resultExpression
= _parentQueryModelVisitor.ReplaceClauseReferences(resultExpression);
}
return(resultExpression);
}
private static Expression HandleAll(
EntityQueryModelVisitor entityQueryModelVisitor,
AllResultOperator allResultOperator,
QueryModel queryModel)
{
var predicate
= entityQueryModelVisitor
.ReplaceClauseReferences(
allResultOperator.Predicate,
queryModel.MainFromClause);
return(Expression.Call(
_all.MakeGenericMethod(typeof(QuerySourceScope)),
entityQueryModelVisitor.CreateScope(
entityQueryModelVisitor.Expression,
entityQueryModelVisitor.StreamedSequenceInfo.ResultItemType,
queryModel.MainFromClause),
Expression.Lambda(predicate, EntityQueryModelVisitor.QuerySourceScopeParameter)));
}
private static Expression HandleAll(
EntityQueryModelVisitor entityQueryModelVisitor,
AllResultOperator allResultOperator,
QueryModel queryModel)
{
var sequenceType
= entityQueryModelVisitor.Expression.Type.GetSequenceType();
var predicate
= entityQueryModelVisitor
.ReplaceClauseReferences(
allResultOperator.Predicate,
queryModel.MainFromClause);
return(CallWithPossibleCancellationToken(
entityQueryModelVisitor.LinqOperatorProvider.All
.MakeGenericMethod(sequenceType),
entityQueryModelVisitor.Expression,
Expression.Lambda(predicate, entityQueryModelVisitor.CurrentParameter)));
}
private static Expression HandleAll(
EntityQueryModelVisitor entityQueryModelVisitor,
AllResultOperator allResultOperator,
QueryModel queryModel)
{
var predicate
= entityQueryModelVisitor
.ReplaceClauseReferences(
allResultOperator.Predicate,
queryModel.MainFromClause);
return(CallWithPossibleCancellationToken(
entityQueryModelVisitor.LinqOperatorProvider.All
.MakeGenericMethod(typeof(QueryResultScope)),
entityQueryModelVisitor.CreateScope(
entityQueryModelVisitor.Expression,
entityQueryModelVisitor.StreamedSequenceInfo.ResultItemType,
queryModel.MainFromClause),
Expression.Lambda(predicate, EntityQueryModelVisitor.QueryResultScopeParameter)));
}
