private MethodCallExpression Build(Expression outerSource, Expression innerSource, IReadOnlyList <IEdmNavigationProperty> joinPath, IEdmNavigationProperty navigationProperty, bool manyToMany)
{
Type outerType = OeExpressionHelper.GetCollectionItemType(outerSource.Type);
Type innerType = OeExpressionHelper.GetCollectionItemType(innerSource.Type);
LambdaExpression groupJoinOuterKeySelector = GetGroupJoinOuterKeySelector(outerType, navigationProperty, joinPath);
LambdaExpression groupJoinInnerKeySelector = GetGroupJoinInnerKeySelector(innerType, navigationProperty);
if (groupJoinOuterKeySelector.ReturnType != groupJoinInnerKeySelector.ReturnType)
{
Expression innerBody = CoerceExpression(groupJoinOuterKeySelector.Body, groupJoinInnerKeySelector.Body);
if (innerBody.Type != groupJoinInnerKeySelector.ReturnType)
{
groupJoinInnerKeySelector = Expression.Lambda(innerBody, groupJoinInnerKeySelector.Parameters[0]);
}
if (innerBody.Type != groupJoinOuterKeySelector.ReturnType)
{
Expression outerBody = CoerceExpression(innerBody, groupJoinOuterKeySelector.Body);
groupJoinOuterKeySelector = Expression.Lambda(outerBody, groupJoinOuterKeySelector.Parameters[0]);
}
}
LambdaExpression groupJoinResultSelect = GetGroupJoinResultSelector(outerType, innerType, manyToMany);
MethodInfo groupJoinMethodInfo = OeMethodInfoHelper.GetGroupJoinMethodInfo(outerType, innerType, groupJoinOuterKeySelector.ReturnType, groupJoinResultSelect.ReturnType);
MethodCallExpression groupJoinCall = Expression.Call(groupJoinMethodInfo, outerSource, innerSource, groupJoinOuterKeySelector, groupJoinInnerKeySelector, groupJoinResultSelect);
LambdaExpression selectManySource = GetSelectManyCollectionSelector(groupJoinResultSelect);
LambdaExpression selectManyResultSelector = GetSelectManyResultSelector(groupJoinResultSelect);
MethodInfo selectManyMethodInfo = OeMethodInfoHelper.GetSelectManyMethodInfo(groupJoinResultSelect.ReturnType, innerType, selectManyResultSelector.ReturnType);
return(Expression.Call(selectManyMethodInfo, groupJoinCall, selectManySource, selectManyResultSelector));
}
public MethodCallExpression Build(Expression outer, Expression inner, ODataPath odataPath, OrderByClause orderBy, long?skip, long?top)
{
var segment = (NavigationPropertySegment)odataPath.LastSegment;
IEdmNavigationProperty navigationProperty = segment.NavigationProperty;
if (navigationProperty.ContainsTarget)
{
ModelBuilder.ManyToManyJoinDescription joinDescription = _edmModel.GetManyToManyJoinDescription(navigationProperty);
IEdmEntitySet joinEntitySet = OeEdmClrHelper.GetEntitySet(_edmModel, joinDescription.JoinNavigationProperty);
outer = OeEnumerableStub.CreateEnumerableStubExpression(joinDescription.JoinClassType, joinEntitySet);
navigationProperty = joinDescription.TargetNavigationProperty;
}
Type outerType = OeExpressionHelper.GetCollectionItemType(outer.Type);
ParameterExpression outerParameter = Expression.Parameter(outerType, outerType.Name);
inner = new ReplaceParameterVisitor(outerParameter).Visit(inner); //replace $it
Expression subquery = CreateWhereExpression(outerParameter, inner, navigationProperty);
subquery = _expressionBuilder.ApplyOrderBy(subquery, orderBy);
subquery = _expressionBuilder.ApplySkip(subquery, skip, odataPath);
subquery = _expressionBuilder.ApplyTake(subquery, top, odataPath);
Type innerType = OeExpressionHelper.GetCollectionItemType(inner.Type);
MethodInfo selectManyMethdoInfo = OeMethodInfoHelper.GetSelectManyMethodInfo(outerType, innerType);
return(Expression.Call(selectManyMethdoInfo, outer, Expression.Lambda(subquery, outerParameter)));
}
public static MethodCallExpression Build(Expression outer, Expression inner, ExpandedNavigationSelectItem item, ODataPath odataPath, OeExpressionBuilder expressionBuilder)
{
var segment = (NavigationPropertySegment)item.PathToNavigationProperty.LastSegment;
Type outerType = OeExpressionHelper.GetCollectionItemType(outer.Type);
var outerParameter = Expression.Parameter(outerType, outerType.Name);
Expression subquery = CreateWhereExpression(outerParameter, inner, segment.NavigationProperty);
subquery = expressionBuilder.ApplyOrderBy(subquery, item.OrderByOption);
subquery = expressionBuilder.ApplySkip(subquery, item.SkipOption, odataPath);
subquery = expressionBuilder.ApplyTake(subquery, item.TopOption, odataPath);
Type innerType = OeExpressionHelper.GetCollectionItemType(inner.Type);
MethodInfo selectManyMethdoInfo = OeMethodInfoHelper.GetSelectManyMethodInfo(outerType, innerType);
return(Expression.Call(selectManyMethdoInfo, outer, Expression.Lambda(subquery, outerParameter)));
}
private MethodCallExpression Build(Expression outerSource, Expression innerSource, IReadOnlyList <IEdmNavigationProperty> joinPath, IEdmNavigationProperty navigationProperty, bool manyToMany)
{
Type outerType = OeExpressionHelper.GetCollectionItemType(outerSource.Type);
Type innerType = OeExpressionHelper.GetCollectionItemType(innerSource.Type);
(LambdaExpression groupJoinOuterKeySelector, LambdaExpression groupJoinInnerKeySelector) = GetJoinKeySelector(outerType, innerType, joinPath, navigationProperty);
LambdaExpression groupJoinResultSelect = GetGroupJoinResultSelector(outerType, innerType, manyToMany);
MethodInfo groupJoinMethodInfo = OeMethodInfoHelper.GetGroupJoinMethodInfo(outerType, innerType, groupJoinOuterKeySelector.ReturnType, groupJoinResultSelect.ReturnType);
MethodCallExpression groupJoinCall = Expression.Call(groupJoinMethodInfo, outerSource, innerSource, groupJoinOuterKeySelector, groupJoinInnerKeySelector, groupJoinResultSelect);
LambdaExpression selectManySource = GetSelectManyCollectionSelector(groupJoinResultSelect);
LambdaExpression selectManyResultSelector = GetSelectManyResultSelector(groupJoinResultSelect);
MethodInfo selectManyMethodInfo = OeMethodInfoHelper.GetSelectManyMethodInfo(groupJoinResultSelect.ReturnType, innerType, selectManyResultSelector.ReturnType);
return(Expression.Call(selectManyMethodInfo, groupJoinCall, selectManySource, selectManyResultSelector));
}