public virtual TValue AddOrUpdate <TItem, TValue>(TItem item, string path,
Func <TItem, object, TValue> addValueFactory,
UpdateValueDelegate <TItem, Func <TItem, object, TValue>, TValue, object> updateValueFactory,
object state = null)
{
Should.NotBeNull(item, "item");
Should.NotBeNull(path, "path");
Should.NotBeNull(addValueFactory, "addValueFactory");
Should.NotBeNull(updateValueFactory, "updateValueFactory");
LightDictionaryBase <string, object> dictionary = GetOrAddAttachedDictionary(item, true);
lock (dictionary)
{
object value;
if (dictionary.TryGetValue(path, out value))
{
value = updateValueFactory(item, addValueFactory, (TValue)value, state);
dictionary[path] = value;
return((TValue)value);
}
value = addValueFactory(item, state);
dictionary.Add(path, value);
return((TValue)value);
}
}
public virtual TValue GetValue <TValue>(object item, string path, bool throwOnError)
{
Should.NotBeNull(item, "item");
Should.NotBeNull(path, "path");
LightDictionaryBase <string, object> dictionary = GetOrAddAttachedDictionary(item, false);
if (dictionary == null)
{
if (throwOnError)
{
throw new KeyNotFoundException();
}
return(default(TValue));
}
lock (dictionary)
{
object value;
if (!dictionary.TryGetValue(path, out value))
{
if (throwOnError)
{
throw new KeyNotFoundException();
}
return(default(TValue));
}
return((TValue)value);
}
}
public virtual TValue GetOrAdd <TValue>(object item, string path, TValue value)
{
Should.NotBeNull(item, "item");
Should.NotBeNull(path, "path");
LightDictionaryBase <string, object> dictionary = GetOrAddAttachedDictionary(item, true);
lock (dictionary)
{
object oldValue;
if (dictionary.TryGetValue(path, out oldValue))
{
return((TValue)oldValue);
}
dictionary.Add(path, value);
return(value);
}
}
public virtual TValue GetOrAdd <TItem, TValue>(TItem item, string path, Func <TItem, object, TValue> valueFactory,
object state = null)
{
Should.NotBeNull(item, "item");
Should.NotBeNull(path, "path");
Should.NotBeNull(valueFactory, "valueFactory");
LightDictionaryBase <string, object> dictionary = GetOrAddAttachedDictionary(item, true);
lock (dictionary)
{
object oldValue;
if (dictionary.TryGetValue(path, out oldValue))
{
return((TValue)oldValue);
}
oldValue = valueFactory(item, state);
dictionary.Add(path, oldValue);
return((TValue)oldValue);
}
}
public virtual TValue AddOrUpdate <TItem, TValue>(TItem item, string path, TValue addValue,
UpdateValueDelegate <TItem, TValue, TValue, object> updateValueFactory,
object state = null)
{
Should.NotBeNull(item, nameof(item));
Should.NotBeNull(path, nameof(path));
Should.NotBeNull(updateValueFactory, nameof(updateValueFactory));
LightDictionaryBase <string, object> dictionary = GetOrAddAttachedDictionary(item, true);
lock (dictionary)
{
object value;
if (dictionary.TryGetValue(path, out value))
{
value = updateValueFactory(item, addValue, (TValue)value, state);
dictionary[path] = value;
return((TValue)value);
}
dictionary.Add(path, addValue);
return(addValue);
}
}
public virtual bool TryGetValue <TValue>(object item, string path, out TValue value)
{
Should.NotBeNull(item, "item");
Should.NotBeNull(path, "path");
LightDictionaryBase <string, object> dictionary = GetOrAddAttachedDictionary(item, false);
if (dictionary == null)
{
value = default(TValue);
return(false);
}
lock (dictionary)
{
object result;
if (dictionary.TryGetValue(path, out result))
{
value = (TValue)result;
return(true);
}
value = default(TValue);
return(false);
}
}