Mechanism.cs

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
 
namespace Waher.Security.SPF.Mechanisms
{
    public abstract class Mechanism
    {
        protected SpfQualifier qualifier;
 
        protected readonly Term term;
 
        public Mechanism(Term Term, SpfQualifier Qualifier)
        {
            this.term = Term;
            this.qualifier = Qualifier;
        }
 
        public SpfQualifier Qualifier => this.qualifier;
 
        public virtual Task Expand()
        {
            return Task.CompletedTask;
        }
 
        public abstract Task<SpfResult> Matches();
    }
}