using System;
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namespace OpenTap
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{
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/// <summary>
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/// Ordering constraint for plugin types. This should be used 'before' something else.
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/// This is currently only support by implementations of IStringConvertProvider.
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/// If more than one of these attributes are used, it will try to find a type before all of them.
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/// </summary>
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[AttributeUsage(AttributeTargets.Class, AllowMultiple = true)]
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public class BeforeAttribute: Attribute
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{
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readonly ITypeData type;
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/// <summary>
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/// Creates a BeforeAttribute from a type parameter. This is the safest way, but requires a public C# type.
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/// </summary>
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public BeforeAttribute(Type type)
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{
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this.type = TypeData.FromType(type);
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}
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/// <summary>
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/// Creates a BeforeAttribute from a string type name..
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/// </summary>
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/// <param name="typeName"></param>
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public BeforeAttribute(string typeName)
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{
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this.type = TypeData.GetTypeData(typeName);
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}
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/// <summary>
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/// returns true if the marked type should come before the 'other' type.
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/// This can method can be overridden for more custom 'before' behavior.
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/// </summary>
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/// <param name="other"></param>
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/// <returns></returns>
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public virtual bool Before(ITypeData other)
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{
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if (type != null && Equals(type, other))
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return true;
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return false;
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}
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}
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}
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