private static ParameterKey GetOrCreateComposedKey(ref ParameterComposedKey composedKey)
{
ParameterKey result;
lock (composedKeys)
{
if (!composedKeys.TryGetValue(composedKey, out result))
{
var keyName = composedKey.Key.Name;
var builder = new StringBuilder(keyName.Length + 10 + composedKey.Name.Length);
builder.Append(keyName);
builder.Append('.');
builder.Append(composedKey.Name);
if (composedKey.Indexer >= 0)
{
builder.Append('[');
builder.Append(composedKey.Indexer);
builder.Append(']');
}
result = ComposeWith(composedKey.Key, builder);
composedKeys.Add(composedKey, result);
}
}
return(result);
}
/// <summary>
/// Compose a key with a name and index (e.g if key is `MyKey.MyKeyName` and name is `MyName` and index is 5, the result key will be `MyKey.MyKeyName.MyName[5]`)
/// </summary>
/// <typeparam name="T">Type of the key value</typeparam>
/// <param name="key">The key.</param>
/// <param name="name">The name to append to the key.</param>
/// <param name="index">The index.</param>
/// <returns>T.</returns>
/// <exception cref="System.ArgumentNullException">
/// key
/// or
/// name
/// </exception>
/// <exception cref="System.ArgumentOutOfRangeException">index;Must be >= 0</exception>
public static T ComposeIndexer <T>(this T key, string name, int index) where T : ParameterKey
{
if (key == null)
{
throw new ArgumentNullException("key");
}
if (name == null)
{
throw new ArgumentNullException("name");
}
var composedKey = new ParameterComposedKey(key, name, index);
return((T)GetOrCreateComposedKey(ref composedKey));
}
