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Merge pull request #112 from TheTribe/release/3.10-beta.3
release 3.10-beta.3
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190 changes: 190 additions & 0 deletions
190
src/Patterns/Configuration/InMemoryConfigurationSource.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,190 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Configuration; | ||
| using System.Linq; | ||
| using System.Reflection; | ||
| using System.Xml.Linq; | ||
|
|
||
| using Patterns.Text.RegularExpressions; | ||
|
|
||
| namespace Patterns.Configuration | ||
| { | ||
| /// <summary> | ||
| /// Provides a configuration source that uses an in-memory configuration rather than a | ||
| /// file-based one. | ||
| /// </summary> | ||
| public abstract class InMemoryConfigurationSource : IConfigurationSource | ||
| { | ||
| protected const string AppSettingsSectionName = "appSettings"; | ||
| protected const string ConnectionStringsSectionName = "connectionStrings"; | ||
| protected const string ConfigSectionsElementName = "configSections"; | ||
| protected const string SectionElementName = "section"; | ||
| protected const string NameAttributeName = "name"; | ||
| protected const string TypeAttributeName = "type"; | ||
| protected const string DeserializeSectionMethodName = "DeserializeSection"; | ||
| protected const char PathSeparator = '/'; | ||
| protected readonly CompiledRegex SectionNamePattern = "[^/]+$"; | ||
| private XContainer _configXml; | ||
|
|
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| /// <summary> | ||
| /// Gets the app settings. | ||
| /// </summary> | ||
| /// <value> | ||
| /// The app settings. | ||
| /// </value> | ||
| public virtual IDictionary<string, string> AppSettings { get; private set; } | ||
|
|
||
| /// <summary> | ||
| /// Gets the connection strings. | ||
| /// </summary> | ||
| /// <value> | ||
| /// The connection strings. | ||
| /// </value> | ||
| public virtual IDictionary<string, ConnectionStringSettings> ConnectionStrings { get; private set; } | ||
|
|
||
| /// <summary> | ||
| /// Gets the section. | ||
| /// </summary> | ||
| /// <param name="sectionName">Name of the section.</param> | ||
| /// <returns></returns> | ||
| /// <exception cref="System.NotImplementedException"></exception> | ||
| public virtual ConfigurationSection GetSection(string sectionName) | ||
| { | ||
| return DeserializeSection(_configXml, sectionName); | ||
| } | ||
|
|
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| /// <summary> | ||
| /// Gets the section. | ||
| /// </summary> | ||
| /// <typeparam name="TSection">The type of the section.</typeparam> | ||
| /// <param name="sectionName">Name of the section.</param> | ||
| /// <returns></returns> | ||
| /// <exception cref="System.NotImplementedException"></exception> | ||
| public virtual TSection GetSection<TSection>(string sectionName) where TSection : ConfigurationSection, new() | ||
| { | ||
| return DeserializeSection<TSection>(_configXml, sectionName); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Opens the exe configuration. | ||
| /// </summary> | ||
| /// <param name="exePath">The exe path.</param> | ||
| /// <returns></returns> | ||
| /// <exception cref="System.NotImplementedException"></exception> | ||
| public virtual IConfiguration OpenExeConfiguration(string exePath) | ||
| { | ||
| throw new NotSupportedException(); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Opens the machine configuration. | ||
| /// </summary> | ||
| /// <returns></returns> | ||
| /// <exception cref="System.NotImplementedException"></exception> | ||
| public virtual IConfiguration OpenMachineConfiguration() | ||
| { | ||
| throw new NotSupportedException(); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Refreshes the section. | ||
| /// </summary> | ||
| /// <param name="sectionName">Name of the section.</param> | ||
| /// <exception cref="System.NotImplementedException"></exception> | ||
| public virtual void RefreshSection(string sectionName) {} | ||
|
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| /// <summary> | ||
| /// Opens the mapped exe configuration. | ||
| /// </summary> | ||
| /// <param name="fileMap">The file map.</param> | ||
| /// <param name="userLevel">The user level.</param> | ||
| /// <returns></returns> | ||
| /// <exception cref="System.NotImplementedException"></exception> | ||
| public virtual IConfiguration OpenMappedExeConfiguration(ExeConfigurationFileMap fileMap, | ||
| ConfigurationUserLevel userLevel) | ||
| { | ||
| throw new NotSupportedException(); | ||
| } | ||
|
|
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| /// <summary> | ||
| /// Opens the exe configuration. | ||
| /// </summary> | ||
| /// <param name="userLevel">The user level.</param> | ||
| /// <returns></returns> | ||
| /// <exception cref="System.NotImplementedException"></exception> | ||
| public virtual IConfiguration OpenExeConfiguration(ConfigurationUserLevel userLevel) | ||
| { | ||
| throw new NotSupportedException(); | ||
| } | ||
|
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| protected void SetConfigurationXml(XContainer configXml) | ||
| { | ||
| _configXml = configXml; | ||
| var appSettings = GetSection<AppSettingsSection>(AppSettingsSectionName); | ||
| if (appSettings != null) | ||
| { | ||
| AppSettings = appSettings.Settings.AllKeys | ||
| .ToDictionary(key => key, key => appSettings.Settings[key].Value); | ||
| } | ||
| var connectionStrings = GetSection<ConnectionStringsSection>(ConnectionStringsSectionName); | ||
| if (connectionStrings != null) | ||
| { | ||
| ConnectionStrings = connectionStrings.ConnectionStrings.OfType<ConnectionStringSettings>() | ||
| .ToDictionary(settings => settings.Name, settings => settings); | ||
| } | ||
| } | ||
|
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| protected virtual ConfigurationSection DeserializeSection(XContainer xml, string name) | ||
| { | ||
| XElement sections = xml.Element(ConfigSectionsElementName); | ||
| if (sections == null) return null; | ||
|
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| XElement sectionDefinition = sections | ||
| .Descendants(SectionElementName) | ||
| .FirstOrDefault(section => section.Attribute(NameAttributeName).Value == SectionNamePattern.Match(name).Value); | ||
|
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| if (sectionDefinition == null) return null; | ||
|
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| Type sectionType = Type.GetType(sectionDefinition.Attribute(TypeAttributeName).Value, false); | ||
|
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| if (sectionType == null) return null; | ||
|
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| const BindingFlags flags = BindingFlags.Static | BindingFlags.NonPublic; | ||
| MethodInfo genericFlavor = typeof (InMemoryConfigurationSource).GetMethods(flags) | ||
| .FirstOrDefault(method => method.Name == DeserializeSectionMethodName && method.IsGenericMethod); | ||
| if (genericFlavor == null) return null; | ||
|
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| MethodInfo typedGenericFlavor = genericFlavor.MakeGenericMethod(sectionType); | ||
|
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| try | ||
| { | ||
| return (ConfigurationSection) typedGenericFlavor.Invoke(null, new object[] {xml, name}); | ||
| } | ||
| catch (TargetInvocationException error) | ||
| { | ||
| throw error.InnerException; | ||
| } | ||
| } | ||
|
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| protected static TSection DeserializeSection<TSection>(XContainer xml, string name) | ||
| where TSection : ConfigurationSection, new() | ||
| { | ||
| var config = new TSection(); | ||
| const BindingFlags flags = BindingFlags.Instance | BindingFlags.NonPublic; | ||
| MethodInfo deserializer = typeof (TSection).GetMethod(DeserializeSectionMethodName, flags); | ||
| XContainer sectionXml = name.Split(PathSeparator).Aggregate(xml, (current, part) => current.Element(part)); | ||
| if (sectionXml == null) return null; | ||
|
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| try | ||
| { | ||
| deserializer.Invoke(config, new object[] {sectionXml.CreateReader()}); | ||
| } | ||
| catch (TargetInvocationException error) | ||
| { | ||
| throw error.InnerException; | ||
| } | ||
|
|
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| return config; | ||
| } | ||
| } | ||
| } |
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