/// <summary>
/// The Get methods return policies taking into account inheritance. If a policy
/// can't be found it may return null, but never an 'undefined' policy.
/// </summary>
/// <returns>
/// The policy of the given type, or null if not found.
/// </returns>
public T Get <T> () where T : class, IEquatable <T>, new ()
{
if (policies != null)
{
object policy;
if (policies.TryGetValue(typeof(T), null, out policy))
{
if (!PolicyService.IsUndefinedPolicy(policy))
{
return((T)policy);
}
else if (InheritDefaultPolicies)
{
return(PolicyService.GetDefaultPolicy <T> ());
}
else
{
return(null);
}
}
}
if (!InheritDefaultPolicies)
{
return(null);
}
else if (IsRoot)
{
return(PolicyService.GetDefaultPolicy <T> ());
}
else
{
return(ParentPolicies.Get <T> ());
}
}
public void Set <T> (T value, string scope) where T : class, IEquatable <T>, new ()
{
CheckReadOnly();
PolicyKey key = new PolicyKey(typeof(T), scope);
System.Diagnostics.Debug.Assert(key.Scope == scope);
if (policies == null)
{
policies = new PolicyDictionary();
}
else if (value != null)
{
object oldVal = null;
policies.TryGetValue(key, out oldVal);
if (oldVal != null && ((IEquatable <T>)oldVal).Equals(value))
{
return;
}
}
policies[key] = value;
OnPolicyChanged(key.PolicyType, key.Scope);
}