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Added extensible method filtering using MethodFilterFactory
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Donn Relacion
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Jul 4, 2022
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| // ------------------------------------------------------------------------------------------------- | ||
| // Copyright (c) almostchristian. All rights reserved. | ||
| // ------------------------------------------------------------------------------------------------- | ||
|
|
||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Reflection; | ||
|
|
||
| namespace ConfigurationProcessor.Core | ||
| { | ||
| /// <summary> | ||
| /// Contains method filter factories. | ||
| /// </summary> | ||
| public static class MethodFilterFactories | ||
| { | ||
| private static bool DefaultMethodFilter(MethodInfo method, string name) | ||
| => true; | ||
|
|
||
| /// <summary> | ||
| /// Method filter factory that accepts methods with names like '<paramref name="name"/>' or 'Add<paramref name="name"/>'. | ||
| /// </summary> | ||
| /// <param name="name">The configuration name to search for.</param> | ||
| /// <returns>The method filter and candidate names.</returns> | ||
| public static (MethodFilter Filter, IEnumerable<string> CandidateNames) DefaultMethodFilterFactory(string name) | ||
| { | ||
| var candidates = new HashSet<string>(StringComparer.OrdinalIgnoreCase) { name, $"Add{name}" }; | ||
| return (DefaultMethodFilter, candidates); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Creates a method filter factory with suffixes. | ||
| /// </summary> | ||
| /// <param name="methodNameSuffixes">The method name suffixes to search for.</param> | ||
| /// <returns>The method filter factory.</returns> | ||
| public static MethodFilterFactory WithSuffixes(params string[] methodNameSuffixes) | ||
| => WithSuffixes(DefaultMethodFilter, methodNameSuffixes); | ||
|
|
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| /// <summary> | ||
| /// Creates a method filter factory with suffixes. | ||
| /// </summary> | ||
| /// <param name="methodFilter">The default method filter factory.</param> | ||
| /// <param name="methodNameSuffixes">The method name suffixes to search for.</param> | ||
| /// <returns>The method filter factory.</returns> | ||
| public static MethodFilterFactory WithSuffixes(MethodFilter methodFilter, params string[] methodNameSuffixes) | ||
| => WithPrefixAndSuffixes(methodFilter, new[] { "Add" }, methodNameSuffixes); | ||
|
|
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| /// <summary> | ||
| /// Creates a method filter factory with prefixes and suffixes. | ||
| /// </summary> | ||
| /// <param name="methodFilter">The default method filter factory.</param> | ||
| /// <param name="methodNamePrefixes">The method name suffixes to search for.</param> | ||
| /// <param name="methodNameSuffixes">The method name suffixes to search for.</param> | ||
| /// <returns>The method filter factory.</returns> | ||
| public static MethodFilterFactory WithPrefixAndSuffixes(MethodFilter methodFilter, string[] methodNamePrefixes, string[] methodNameSuffixes) | ||
| { | ||
| return name => | ||
| { | ||
| var candidates = GetCandidateNames(name, methodNamePrefixes, methodNameSuffixes); | ||
| return (methodFilter, candidates); | ||
| }; | ||
|
|
||
| static List<string> GetCandidateNames(string name, string[] methodNamePrefixes, string[] candidateSuffixes) | ||
| { | ||
| const char GenericTypeMarker = '`'; | ||
| var namesplit = name.Split(GenericTypeMarker); | ||
|
|
||
| var result = new List<string> { name }; | ||
|
|
||
| if (candidateSuffixes.Length > 0) | ||
| { | ||
| if (namesplit.Length > 1) | ||
| { | ||
| result.AddRange(candidateSuffixes.Select(x => $"{namesplit[0] + x}{GenericTypeMarker}{namesplit[1]}")); | ||
| } | ||
| else | ||
| { | ||
| result.AddRange(candidateSuffixes.Select(x => name + x)); | ||
| } | ||
| } | ||
|
|
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| var withPrefix = result.SelectMany(y => methodNamePrefixes.Select(x => x + y)).ToList(); | ||
| result.AddRange(withPrefix); | ||
|
|
||
| return result; | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| // ------------------------------------------------------------------------------------------------- | ||
| // Copyright (c) almostchristian. All rights reserved. | ||
| // ------------------------------------------------------------------------------------------------- | ||
|
|
||
| using System.Collections.Generic; | ||
| using System.Reflection; | ||
|
|
||
| namespace ConfigurationProcessor.Core | ||
| { | ||
| /// <summary> | ||
| /// Delegate for filtering a candidate method. | ||
| /// </summary> | ||
| /// <param name="methodInfo">The method to evaluate.</param> | ||
| /// <param name="name">The configuration name from the method filter factory.</param> | ||
| /// <returns>True if the method is acceptable.</returns> | ||
| public delegate bool MethodFilter(MethodInfo methodInfo, string name); | ||
|
|
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| /// <summary> | ||
| /// Creates method filters. See <see cref="MethodFilterFactories"/> for generating factories. | ||
| /// </summary> | ||
| /// <param name="name">The configuration name.</param> | ||
| /// <returns>Returns the method filter and the candidate names.</returns> | ||
| public delegate (MethodFilter Filter, IEnumerable<string> CandidateNames) MethodFilterFactory(string name); | ||
| } |
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