public override Expression VisitCollectionNotEmpty(CollectionNotEmptyExpression expression, Type argument)
{
Expression property = Visit(expression.TargetCollection, argument);
Type elementType = CollectionConverter.TryGetCollectionElementType(property.Type);
if (elementType == null)
{
throw new InvalidOperationException("Expression must be a collection.");
}
Expression predicate = null;
if (expression.Filter != null)
{
var hasManyThrough = expression.TargetCollection.Fields.Last() as HasManyThroughAttribute;
var lambdaScopeFactory = new LambdaScopeFactory(_nameFactory, hasManyThrough);
using LambdaScope lambdaScope = lambdaScopeFactory.CreateScope(elementType);
var builder = new WhereClauseBuilder(property, lambdaScope, typeof(Enumerable), _nameFactory);
predicate = builder.GetPredicateLambda(expression.Filter);
}
return(AnyExtensionMethodCall(elementType, property, predicate));
}
protected virtual Expression ApplyFilter(Expression source, FilterExpression filter)
{
using var lambdaScope = _lambdaScopeFactory.CreateScope(_elementType);
var builder = new WhereClauseBuilder(source, lambdaScope, _extensionType);
return(builder.ApplyWhere(filter));
}