////////////////////////////////////////////////////////////////////////////////////////////////////
// WhereContext
static object GetAttrFromChain(object o, string name)
{
foreach (var field in name.Split(new char[] { '.' }))
{
o = o != null?Interpreters.Get(o.GetType()).Attr(o, field) : null;
}
return(o);
}
void Select(object obj, int depth)
{
// item not found?
if (obj == null)
{
return;
}
// if we're at the end of the query path then select
if (depth == SearchPath.Length)
{
Selected.Add(obj);
return;
}
// if we are a leaf node but still have a remaining path, then we can go no futher
var type = obj.GetType();
if (type.IsPrimitive)
{
return;
}
// get interpreter for current node
var interpreter = Interpreters.Get(type);
// get next path section
var segment = SearchPath[depth];
// select children
if (segment.NodeType == Path.Segment.Type.Children)
{
// get children from node
var child_nodes = interpreter.Children(obj);
// exit if node has no children
if (child_nodes == null || child_nodes.Length == 0)
{
return;
}
// recurse?
if (segment.RecursiveFind)
{
foreach (var node in child_nodes)
{
Select(node.Value, depth);
}
}
// filter by name
var filtered_children = from child in child_nodes where MatchName(segment, child) select child.Value;
// apply where clause
++depth;
if (segment.Where != null)
{
segment.Where.ForEach(filtered_children, Select, depth);
}
else
{
foreach (var child in filtered_children)
{
Select(child, depth);
}
}
}
// otherwise select attribute
else
{
var attr = interpreter.Attr(obj, segment.Select);
if (attr == null)
{
return;
}
++depth;
if (segment.Where == null)
{
Select(attr, depth);
}
else
{
if (attr is IDictionary)
{
segment.Where.ForEach(attr as IDictionary, Select, depth);
}
else if (attr.GetType().IsArray || attr is IEnumerable)
{
segment.Where.ForEach((attr as IEnumerable).Cast <object>(), Select, depth);
}
else if (segment.Where.Apply(attr))
{
Select(attr, depth);
}
}
}
}
