Keyword.cs

using System.Collections.Generic;
using System.Threading.Tasks;
using Waher.Persistence.FullTextSearch.Orders;
 
namespace Waher.Persistence.FullTextSearch.Keywords
{
    public abstract class Keyword
    {
        public Keyword()
        {
        }
 
        public virtual bool Optional => true;
 
        public virtual bool Required => false;
 
        public virtual bool Prohibited => false;
 
        public virtual int OrderCategory => 0;
 
        public virtual int OrderComplexity => 0;
 
        public virtual bool Ignore => false;
 
        public new abstract bool Equals(object obj);
 
        public new abstract string ToString();
 
        public abstract Task<IEnumerable<KeyValuePair<string, TokenReferences>>> GetTokenReferences(SearchProcess Process);
 
        public virtual async Task<bool> Process(SearchProcess Process)
        {
            IEnumerable<KeyValuePair<string, TokenReferences>> Records = await this.GetTokenReferences(Process);
 
            foreach (KeyValuePair<string, TokenReferences> Rec in Records)
            {
                string Token = Rec.Key;
                TokenReferences References = Rec.Value;
 
                int j, d = References.ObjectReferences.Length;
 
                for (j = 0; j < d; j++)
                {
                    ulong ObjectReference = References.ObjectReferences[j];
 
                    if (!Process.ReferencesByObject.TryGetValue(ObjectReference, out MatchInformation ByObjectReference))
                    {
                        if (Process.IsRestricted)
                            continue;
 
                        ByObjectReference = new MatchInformation();
                        Process.ReferencesByObject[ObjectReference] = ByObjectReference;
                    }
 
                    ByObjectReference.AddTokenReference(new TokenReference()
                    {
                        Count = References.Counts[j],
                        LastBlock = References.LastBlock,
                        ObjectReference = ObjectReference,
                        Timestamp = References.Timestamps[j],
                        Token = Token
                    });
                }
            }
 
            return true;
        }
 
    }
}