/// <summary>
/// Deep-clones the setting group.
/// </summary>
/// <returns>The new group.</returns>
public SettingsGroup DeepClone()
{
var result = new SettingsGroup();
foreach (var setting in _settings)
{
result._settings[setting.Key] = setting.Value;
}
foreach (var group in _groups)
{
result._groups[group.Key] = group.Value.DeepClone();
}
return(result);
}
/// <summary>
/// Gets the value of a setting by path.
/// </summary>
/// <typeparam name="T">The type of the setting.</typeparam>
/// <param name="path">The path of the value to get.</param>
/// <param name="getter">A function that gets the value once the bottom-level group is found.</param>
/// <returns>The value of the setting, as returned by the getter.</returns>
private T GetSettingByPath <T>(string path, Func <SettingsGroup, string, T> getter)
{
string[] pathComponents = SplitPath(path);
SettingsGroup currentGroup = this;
for (int i = 0; i < pathComponents.Length; i++)
{
string component = pathComponents[i];
if (i == pathComponents.Length - 1)
{
return(getter(currentGroup, component));
}
currentGroup = currentGroup._groups[component];
}
throw new ArgumentException("Invalid path");
}
/// <summary>
/// Loads a settings group from an XML container.
/// </summary>
/// <param name="container">The container to read settings from.</param>
/// <returns>The loaded settings group.</returns>
public SettingsGroup LoadSettingsGroup(XContainer container)
{
var result = new SettingsGroup();
foreach (XElement elem in container.Elements())
{
if (elem.HasElements)
{
result.SetGroup(elem.Name.LocalName, LoadSettingsGroup(elem));
}
else
{
result.SetSetting(elem.Name.LocalName, LoadSetting(elem));
}
}
return(result);
}
/// <summary>
/// Determines whether or not a given path has a value defined for it.
/// </summary>
/// <param name="path">The path to check.</param>
/// <returns><c>true</c> if the path has a value defined.</returns>
public bool PathExists(string path)
{
string[] pathComponents = SplitPath(path);
SettingsGroup currentGroup = this;
for (int i = 0; i < pathComponents.Length; i++)
{
string component = pathComponents[i];
if (i == pathComponents.Length - 1)
{
return(currentGroup._settings.ContainsKey(component) ||
currentGroup._groups.ContainsKey(component));
}
if (!currentGroup._groups.TryGetValue(component, out currentGroup))
{
return(false);
}
}
return(false);
}
/// <summary>
/// Imports settings recursively from another group.
/// Any existing settings will be overwritten, and all sub-groups will be merged.
/// </summary>
/// <param name="other">The group to import from.</param>
public void Import(SettingsGroup other)
{
foreach (var setting in other._settings)
{
_settings[setting.Key] = setting.Value;
}
foreach (var group in other._groups)
{
SettingsGroup existingGroup;
if (_groups.TryGetValue(group.Key, out existingGroup))
{
existingGroup.Import(group.Value);
}
else
{
_groups[group.Key] = group.Value;
}
}
}
/// <summary>
/// Sets the value of a setting by path. Any groups will be created along the way.
/// </summary>
/// <param name="path">The path to the setting.</param>
/// <param name="setter">An action that sets the value once the bottom-level group is found.</param>
private void SetSettingByPath(string path, Action <SettingsGroup, string> setter)
{
string[] pathComponents = SplitPath(path);
SettingsGroup currentGroup = this;
for (int i = 0; i < pathComponents.Length; i++)
{
string component = pathComponents[i];
if (i == pathComponents.Length - 1)
{
setter(currentGroup, component);
return;
}
if (!currentGroup._groups.TryGetValue(component, out currentGroup))
{
// Sub-group does not exist - create one
var newGroup = new SettingsGroup();
currentGroup._groups[component] = newGroup;
currentGroup = newGroup;
}
}
}
/// <summary>
/// Loads an engine database from an XML container.
/// </summary>
/// <param name="container">The container to read engine elements from.</param>
/// <returns>The built engine database.</returns>
public static EngineDatabase LoadDatabase(XContainer container)
{
XMLSettingsGroupLoader loader = CreateSettingsGroupLoader();
var result = new EngineDatabase();
foreach (XElement elem in container.Elements("engine"))
{
string name = XMLUtil.GetStringAttribute(elem, "name");
string version = XMLUtil.GetStringAttribute(elem, "version");
string inherits = XMLUtil.GetStringAttribute(elem, "inherits", null);
SettingsGroup settings = loader.LoadSettingsGroup(elem);
if (!string.IsNullOrWhiteSpace(inherits))
{
// Clone the base engine's settings and then import the new settings on top of it
SettingsGroup baseSettings = result.FindEngineByName(inherits).Settings.DeepClone();
baseSettings.Import(settings);
settings = baseSettings;
}
var desc = new EngineDescription(name, version, settings);
result.RegisterEngine(desc);
}
return(result);
}
/// <summary>
/// Sets a sub-group.
/// </summary>
/// <param name="path">The path to the sub-group to set.</param>
/// <param name="newGroup">The value of the group.</param>
public void SetGroup(string path, SettingsGroup newGroup)
{
SetSettingByPath(path, (group, name) => group._groups[name] = newGroup);
}
