/// <summary>
/// resolves a value from a set of objects base on a reference that contains the key to the object in the dictionary
/// and optionally a dot notation reference to properties of the object.
/// </summary>
/// <param name="indexedRefStart">an indexed reference start string such as [ in some.reference[index]</param>
/// <param name="indexedRefEnd">an indexed reference start string such as ] in some.reference[index]</param>
/// <param name="objects"></param>
/// <param name="refName"></param>
/// <returns></returns>
public static object GetObjectFromReference(
string indexedRefStart,
string indexedRefEnd,
Dictionary <string, object> objects,
string refName
)
{
object refValue = null;
int firstIndexOfDot = refName.IndexOf(".");
int firstIndexOfSquareBracket = refName.IndexOf(indexedRefStart);
if (StringUtility.Contains(refName, ".") &&
(firstIndexOfSquareBracket < 0 || firstIndexOfDot < firstIndexOfSquareBracket))
{
StringTokenizer tokenizer = new StringTokenizer(refName, ".");
string envName = tokenizer.NextToken();
object obj = null;
if (StringUtility.NotEmpty(envName))
{
obj = objects[envName];
if (obj != null)
{
while (tokenizer.HasMoreTokens())
{
if (obj == null)
{
break;
}
string token = tokenizer.NextToken();
string propName = token;
if (StringUtility.NotEmpty(token))
{
bool hasIndex = false;
if (StringUtility.Contains(token, indexedRefStart))
{
hasIndex = true;
propName = token.Substring(0, token.IndexOf(indexedRefStart));
}
PropertyInfo prop = obj.GetType().GetProperty(propName);
if (prop != null && prop.CanRead)
{
if (typeof(IDictionary).IsAssignableFrom(prop.PropertyType))
{
IDictionary dictObj = (IDictionary)prop.GetValue(obj, null);
if (hasIndex)
{
obj = dictObj[StringUtility.ExtractFromDelimiters(token, indexedRefStart, indexedRefEnd)];
}
else
{
obj = dictObj;
}
}
else if (typeof(IList).IsAssignableFrom(prop.PropertyType))
{
IList listObj = (IList)prop.GetValue(obj, null);
if (hasIndex)
{
try
{
int indx = Convert.ToInt32(StringUtility.ExtractFromDelimiters(token, indexedRefStart, indexedRefEnd));
obj = listObj[indx];
}
catch
{
obj = listObj;
}
}
else
{
obj = listObj;
}
}
else
{
obj = prop.GetValue(obj, null);
}
}
else
{
obj = null;
break;
}
}
}
}
}
refValue = obj;
}
else
{
bool hasIndex = false;
string propName = refName;
if (StringUtility.Contains(refName, indexedRefStart))
{
hasIndex = true;
propName = refName.Substring(0, refName.IndexOf(indexedRefStart));
}
object obj = objects[propName];
if (obj == null)
{
refValue = null;
}
else
{
if (hasIndex)
{
if (typeof(IDictionary).IsAssignableFrom(obj.GetType()))
{
IDictionary dictObj = (IDictionary)obj;
obj = dictObj[StringUtility.ExtractFromDelimiters(refName, indexedRefStart, indexedRefEnd)];
}
else if (typeof(IList).IsAssignableFrom(obj.GetType()))
{
IList listObj = (IList)obj;
int indx = Convert.ToInt32(StringUtility.ExtractFromDelimiters(refName, indexedRefStart, indexedRefEnd));
obj = listObj[indx];
}
}
refValue = obj;
}
}
return(refValue);
}
