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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| using System; | ||
| using System.Linq.Expressions; | ||
| using System.Reflection; | ||
| using YamlDotNet.Serialization; | ||
|
|
||
| namespace YamlDotNet.Test | ||
| { | ||
| #if NET20 | ||
| internal static class Portability | ||
| { | ||
| public static SerializerBuilder WithAttributeOverride<TClass>(this SerializerBuilder builder, Expression<Func<TClass, object>> propertyAccessor, Attribute attribute) | ||
| { | ||
| return builder.WithAttributeOverride(typeof(TClass), propertyAccessor.AsProperty().Name, attribute); | ||
| } | ||
|
|
||
| public static DeserializerBuilder WithAttributeOverride<TClass>(this DeserializerBuilder builder, Expression<Func<TClass, object>> propertyAccessor, Attribute attribute) | ||
| { | ||
| return builder.WithAttributeOverride(typeof(TClass), propertyAccessor.AsProperty().Name, attribute); | ||
| } | ||
|
|
||
| public static void Add<TClass>(this YamlAttributeOverrides overrides, Expression<Func<TClass, object>> propertyAccessor, Attribute attribute) | ||
| { | ||
| var property = propertyAccessor.AsProperty(); | ||
| overrides.Add(typeof(TClass), property.Name, attribute); | ||
| } | ||
|
|
||
| public static PropertyInfo AsProperty(this LambdaExpression propertyAccessor) | ||
| { | ||
| var property = TryGetMemberExpression<PropertyInfo>(propertyAccessor); | ||
| if (property == null) | ||
| { | ||
| throw new ArgumentException("Expected a lambda expression in the form: x => x.SomeProperty", "propertyAccessor"); | ||
| } | ||
|
|
||
| return property; | ||
| } | ||
|
|
||
| private static TMemberInfo TryGetMemberExpression<TMemberInfo>(LambdaExpression lambdaExpression) | ||
| where TMemberInfo : MemberInfo | ||
| { | ||
| if (lambdaExpression.Parameters.Count != 1) | ||
| { | ||
| return null; | ||
| } | ||
|
|
||
| var body = lambdaExpression.Body; | ||
|
|
||
| var castExpression = body as UnaryExpression; | ||
| if (castExpression != null) | ||
| { | ||
| if (castExpression.NodeType != ExpressionType.Convert) | ||
| { | ||
| return null; | ||
| } | ||
|
|
||
| body = castExpression.Operand; | ||
| } | ||
|
|
||
| var memberExpression = body as MemberExpression; | ||
| if (memberExpression == null) | ||
| { | ||
| return null; | ||
| } | ||
|
|
||
| if (memberExpression.Expression != lambdaExpression.Parameters[0]) | ||
| { | ||
| return null; | ||
| } | ||
|
|
||
| return memberExpression.Member as TMemberInfo; | ||
| } | ||
| } | ||
| #endif | ||
| } |
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