protected override Expression VisitMethodCall(MethodCallExpression node)
{
if (node.Arguments.Count > 0 && node.Arguments[0] is MemberExpression navigationPropertyExpression)
{
Type?innerItemType = OeExpressionHelper.GetCollectionItemTypeOrNull(navigationPropertyExpression.Type);
if (innerItemType != null)
{
IEdmModel edmModel = _edmModel.GetEdmModel(innerItemType) ?? throw new InvalidOperationException("Cannot find IEdmModel for type " + innerItemType.FullName);
Db.OeDataAdapter dataAdapter = edmModel.GetDataAdapter(edmModel.EntityContainer);
Db.OeEntitySetAdapter?innerEntitySetAdapter = dataAdapter.EntitySetAdapters.Find(innerItemType);
if (innerEntitySetAdapter == null)
{
throw new InvalidOperationException("OeEntitySetAdapter not found for type " + innerItemType.Name);
}
IEdmEntitySet entitySet = edmModel.FindDeclaredEntitySet(innerEntitySetAdapter.EntitySetName);
ConstantExpression innerSource = OeEnumerableStub.CreateEnumerableStubExpression(innerEntitySetAdapter.EntityType, entitySet);
IEdmNavigationProperty navigationProperty = GetEdmNavigationProperty(dataAdapter, navigationPropertyExpression);
Expression[] arguments = node.Arguments.ToArray();
arguments[0] = GetJoin(innerSource, navigationProperty);
return(node.Update(node.Object !, arguments));
}
}
return(base.VisitMethodCall(node));
}
private MethodCallExpression?GetJoin(Expression outer, MemberExpression navigationProperty)
{
Type outerType = outer.Type;
Type innerType = navigationProperty.Type;
IEdmModel?edmModel = _edmModel.GetEdmModel(outerType);
if (edmModel == null)
{
return(null);
}
Db.OeDataAdapter dataAdapter = edmModel.GetDataAdapter(edmModel.EntityContainer);
Db.OeEntitySetAdapter?outerEntitySetAdapter = dataAdapter.EntitySetAdapters.Find(outerType);
if (outerEntitySetAdapter == null)
{
throw new InvalidOperationException("OeEntitySetAdapter not found for type " + outerType.Name);
}
IEdmEntitySet outerEntitySet = OeEdmClrHelper.GetEntitySet(_edmModel, outerEntitySetAdapter.EntitySetName);
IEdmNavigationProperty edmNavigationProperty = outerEntitySet.EntityType().NavigationProperties().Single(p => p.Name == navigationProperty.Member.Name);
Db.OeEntitySetAdapter?innerEntitySetAdapter = dataAdapter.EntitySetAdapters.Find(innerType);
if (innerEntitySetAdapter == null)
{
throw new InvalidOperationException("OeEntitySetAdapter not found for type " + innerType.Name);
}
IEdmEntitySet entitySet = edmModel.FindDeclaredEntitySet(innerEntitySetAdapter.EntitySetName);
ConstantExpression innerSource = OeEnumerableStub.CreateEnumerableStubExpression(innerType, entitySet);
return(GetJoin(outer, innerSource, edmNavigationProperty));
}