/// <summary>
/// Initializes the node.
/// </summary>
/// <param name="context">The parent.</param>
private void InitializeNode(object context)
{
Type contextType = (context == null || context is Type ? context as Type : context.GetType());
if (accessor == null || accessor.RequiresRefresh(contextType))
{
memberName = this.getText();
// clear cached member info if context type has changed (for example, when ASP.NET page is recompiled)
if (accessor != null && accessor.RequiresRefresh(contextType))
{
accessor = null;
}
// initialize this node if necessary
if (contextType != null && accessor == null)
{
// try to initialize node as ExpandoObject value
if (contextType == typeof(ExpandoObject))
{
Type type = TypeRegistry.ResolveType(memberName);
if (type != null)
{
accessor = new TypeValueAccessor(TypeResolutionUtils.ResolveType(memberName));
}
else
{
accessor = new ExpandoObjectValueAccessor(memberName);
}
}
// try to initialize node as enum value first
else if (contextType.IsEnum)
{
try
{
accessor = new EnumValueAccessor(Enum.Parse(contextType, memberName, true));
}
catch (ArgumentException)
{
// ArgumentException will be thrown if specified member name is not a valid
// enum value for the context type. We should just ignore it and continue processing,
// because the specified member could be a property of a Type class (i.e. EnumType.FullName)
}
}
// then try to initialize node as property or field value
if (accessor == null)
{
// check the context type first
accessor = GetPropertyOrFieldAccessor(contextType, memberName, BINDING_FLAGS);
// if not found, probe the Type type
if (accessor == null && context is Type)
{
accessor = GetPropertyOrFieldAccessor(typeof(Type), memberName, BINDING_FLAGS);
}
}
}
// if there is still no match, try to initialize node as type accessor
if (accessor == null)
{
try
{
if (context is IDictionary ctx && ctx.Contains(memberName))
{
accessor = new IDictionaryValueAccessor(memberName);
}
else if (evalContext != null && evalContext.Variables != null && evalContext.Variables.ContainsKey(memberName))
{
accessor = new IDictionaryValueAccessor(memberName);
}
else if ((contextType?.IsValueType).GetValueOrDefault(false))
{
accessor = new ValueTypeAccessor();
}
else
{
accessor = new TypeValueAccessor(TypeResolutionUtils.ResolveType(memberName));
}
}
