Exemplo n.º 1
0
        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));
        }
Exemplo n.º 2
0
        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));
        }