internal static bool Analyze(LambdaExpression le, ResourceExpression re, bool matchMembers)
{
if (le.Body.NodeType == ExpressionType.Constant)
{
if (CommonUtil.IsClientType(le.Body.Type))
{
throw new NotSupportedException("Referencing of local entity type instances not supported when projecting results.");
}
re.Projection = new ProjectionQueryOptionExpression(le.Body.Type, le, new List <string>());
return(true);
}
if (le.Body.NodeType == ExpressionType.Call)
{
MethodCallExpression methodCallExpression = le.Body as MethodCallExpression;
if (methodCallExpression.Method == ReflectionUtil.ProjectMethodInfo.MakeGenericMethod(le.Body.Type))
{
ConstantExpression constantExpression = methodCallExpression.Arguments[1] as ConstantExpression;
re.Projection = new ProjectionQueryOptionExpression(le.Body.Type, ProjectionQueryOptionExpression.DefaultLambda, new List <string>((string[])constantExpression.Value));
return(true);
}
}
if (le.Body.NodeType == ExpressionType.MemberInit || le.Body.NodeType == ExpressionType.New)
{
AnalyzeResourceExpression(le, re);
return(true);
}
if (matchMembers && SkipConverts(le.Body).NodeType == ExpressionType.MemberAccess)
{
AnalyzeResourceExpression(le, re);
return(true);
}
return(false);
}
private static void AnalyzeResourceExpression(LambdaExpression lambda, ResourceExpression resource)
{
PathBox pathBox = new PathBox();
Analyze(lambda, pathBox);
resource.Projection = new ProjectionQueryOptionExpression(lambda.Body.Type, lambda, pathBox.ProjectionPaths.ToList());
resource.ExpandPaths = pathBox.ExpandPaths.Union(resource.ExpandPaths, StringComparer.Ordinal).ToList();
}
internal static Expression Bind(Expression e, ResourceExpression currentInput, ParameterExpression inputParameter, List <ResourceExpression> referencedInputs)
{
InputBinder inputBinder = new InputBinder(currentInput, inputParameter);
Expression result = inputBinder.Visit(e);
referencedInputs.AddRange(inputBinder.referencedInputs);
return(result);
}
internal void VisitQueryOptions(ResourceExpression re)
{
if (!re.HasQueryOptions)
{
return;
}
ResourceSetExpression resourceSetExpression = re as ResourceSetExpression;
if (resourceSetExpression != null)
{
IEnumerator enumerator = resourceSetExpression.SequenceQueryOptions.GetEnumerator();
while (enumerator.MoveNext())
{
Expression expression = (Expression)enumerator.Current;
switch (expression.NodeType)
{
case (ExpressionType)10009:
VisitQueryOptionExpression((RequestOptionsQueryOptionExpression)expression);
break;
case (ExpressionType)10010:
VisitQueryOptionExpression((OperationContextQueryOptionExpression)expression);
break;
case (ExpressionType)10011:
VisitQueryOptionExpression((EntityResolverQueryOptionExpression)expression);
break;
case (ExpressionType)10003:
VisitQueryOptionExpression((TakeQueryOptionExpression)expression);
break;
case (ExpressionType)10006:
VisitQueryOptionExpression((FilterQueryOptionExpression)expression);
break;
}
}
}
if (re.Projection != null && re.Projection.Paths.Count > 0)
{
Projection = re.Projection;
SelectColumns = re.Projection.Paths;
}
if (re.CustomQueryOptions.Count > 0)
{
VisitCustomQueryOptions(re.CustomQueryOptions);
}
}
#pragma warning restore 612, 618
internal void OverrideTarget(ResourceSetExpression newTarget)
{
target = newTarget;
}
#pragma warning disable 612, 618
internal InputReferenceExpression(ResourceExpression target)
: base((ExpressionType)10007, target.ResourceType)
{
this.target = target;
}
internal override Expression VisitMemberAccess(MemberExpression m)
{
if (inputSet == null || !inputSet.HasTransparentScope)
{
return(base.VisitMemberAccess(m));
}
ParameterExpression parameterExpression = null;
Stack <PropertyInfo> stack = new Stack <PropertyInfo>();
MemberExpression memberExpression = m;
while (memberExpression != null && memberExpression.Member.MemberType == MemberTypes.Property && memberExpression.Expression != null)
{
stack.Push((PropertyInfo)memberExpression.Member);
if (memberExpression.Expression.NodeType == ExpressionType.Parameter)
{
parameterExpression = (ParameterExpression)memberExpression.Expression;
}
memberExpression = (memberExpression.Expression as MemberExpression);
}
if (parameterExpression != inputParameter || stack.Count == 0)
{
return(m);
}
ResourceExpression resource = input;
ResourceSetExpression resourceSetExpression = inputSet;
bool flag = false;
while (stack.Count > 0 && resourceSetExpression != null && resourceSetExpression.HasTransparentScope)
{
PropertyInfo propertyInfo = stack.Peek();
if (propertyInfo.Name.Equals(resourceSetExpression.TransparentScope.Accessor, StringComparison.Ordinal))
{
resource = resourceSetExpression;
stack.Pop();
flag = true;
continue;
}
if (!resourceSetExpression.TransparentScope.SourceAccessors.TryGetValue(propertyInfo.Name, out Expression value))
{
break;
}
flag = true;
stack.Pop();
InputReferenceExpression inputReferenceExpression = value as InputReferenceExpression;
if (inputReferenceExpression == null)
{
resourceSetExpression = (value as ResourceSetExpression);
if (resourceSetExpression == null || !resourceSetExpression.HasTransparentScope)
{
resource = (ResourceExpression)value;
}
}
else
{
resourceSetExpression = (inputReferenceExpression.Target as ResourceSetExpression);
resource = resourceSetExpression;
}
}
if (!flag)
{
return(m);
}
Expression expression = CreateReference(resource);
while (stack.Count > 0)
{
expression = Expression.Property(expression, stack.Pop());
}
return(expression);
}
private InputBinder(ResourceExpression resource, ParameterExpression setReferenceParam)
{
input = resource;
inputSet = (resource as ResourceSetExpression);
inputParameter = setReferenceParam;
}
private Expression CreateReference(ResourceExpression resource)
{
referencedInputs.Add(resource);
return(resource.CreateReference());
}
