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POhow to implement class with collection of string/object pairs so that an object can be returned with generic method?
 

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  1. POhow to implement class with collection of string/object pairs so that an object can be returned with generic method?
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    <p>The values in a file are read as string and can be double, string or int or maybe even lists. An example file:</p> <pre> DatabaseName=SomeBase Classes=11;12;13 IntValue=3 //this is required! DoubleValue=4.0 </pre> <p>I was thinking something like this:</p> <pre><code>class ConfigValues { private static SomeObject _utiObject; private static string _cfgFileName = "\\SomeSettings.cfg"; private static Dictionary&lt;string, Type&gt; _settingNamesAndTypes = new Dictionary&lt;string, Type&gt;(); private static Dictionary&lt;string, object&gt; _settings = new Dictionary&lt;string, object&gt;(); private static string _directory = string.Empty; const string _impossibleDefaultValue = "987ABC654DEF321GHI"; public static T GetConfigValue&lt;T&gt;(string cfgName) { object value; if (_settings.TryGetValue(cfgName, out value)) return (T)value; else return default(T); } public static bool LoadConfig(Dictionary&lt;string, Type&gt; reqSettings, Dictionary&lt;string, Type&gt; optSettings, Dictionary&lt;string, object&gt; optDefaultValues, out string errorMsg) { errorMsg = string.Empty; try { _utiObject = new SomeObject(new string[] { "-c", CfgFileNameAndPath }); } catch (Exception e) { errorMsg = string.Format("Unable to read {0}. Exception: {1}", CfgFileNameAndPath, e.Message); return false; } foreach (KeyValuePair&lt;string, Type&gt; kVPair in reqSettings) { if (!ReadCheckAndStore(kVPair, null, out errorMsg)) return false; _settingNamesAndTypes.Add(kVPair.Key, kVPair.Value); } foreach (KeyValuePair&lt;string, Type&gt; kVPair in optSettings) { if (!ReadCheckAndStore(kVPair, optDefaultValues[kVPair.Key], out errorMsg)) return false; _settingNamesAndTypes.Add(kVPair.Key, kVPair.Value); } return true; } private static bool ReadCheckAndStore(KeyValuePair&lt;string, Type&gt; kVPair, object defaultValue, out string errorMsg) { errorMsg = string.Empty; string usedDefaultValue, value = string.Empty; /* required setting */ if (defaultValue == null) usedDefaultValue = _impossibleDefaultValue; else usedDefaultValue = defaultValue.ToString(); //all string parameters below _utiObject.GetConfigValue(kVPair.Key, usedDefaultValue, ref value); if (_impossibleDefaultValue == value) { errorMsg = string.Format("Required configuration setting {0} was not" + "found in {1}", kVPair.Key, CfgFileNameAndPath); return false; } Type type = kVPair.Value; _settings[kVPair.Key] = Convert.ChangeType(value, type); return true; } } </code></pre> <p>PS. Additional issue is default values for optional settings. It's not elegant to pass them to LoadConfig in separate Dictionary, but that is an other issue...</p>
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    1. COsorry. I was not able to use arrowheads and my example was total BS. now squarebrackets.
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    2. COthis was soooo stupid idea. there was no point whatsoever in this whole thing...
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    3. COTHIS IS USELESS SINCE I CANNOT EXPRESS THE < > FOR GENEREICS!!!!
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