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));
}
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));
}