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hOOt - full text search engine

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4.92/5 (156 votes)
24 Feb 2019CPOL17 min read 1M   22.5K   388  
Smallest full text search engine (lucene replacement) built from scratch using inverted MGRB bitmap index, highly compact storage, operating in database and document modes
#if net4
using System;
using System.Collections.Generic;
using System.Dynamic;
using System.Linq;

namespace fastJSON
{
    internal class DynamicJson : DynamicObject
    {
        private IDictionary<string, object> _dictionary { get; set; }
        private List<object> _list { get; set; }

        public DynamicJson(string json)
        {
            var parse = fastJSON.JSON.Parse(json);

            if (parse is IDictionary<string, object>)
                _dictionary = (IDictionary<string, object>)parse;
            else
                _list = (List<object>)parse;
        }

        private DynamicJson(object dictionary)
        {
            if (dictionary is IDictionary<string, object>)
                _dictionary = (IDictionary<string, object>)dictionary;
        }

        public override IEnumerable<string> GetDynamicMemberNames()
        {
            return _dictionary.Keys.ToList();
        }

        public override bool TryGetIndex(GetIndexBinder binder, Object[] indexes, out Object result)
        {
            var index = indexes[0];
            if (index is int)
            {
                result = _list[(int) index];
            }
            else
            {
                result = _dictionary[(string) index];
            } 
            if (result is IDictionary<string, object>)
                result = new DynamicJson(result as IDictionary<string, object>);
            return true;
        }

        public override bool TryGetMember(GetMemberBinder binder, out object result)
        {
            if (_dictionary.TryGetValue(binder.Name, out result) == false)
                if (_dictionary.TryGetValue(binder.Name.ToLower(), out result) == false)
                    return false;// throw new Exception("property not found " + binder.Name);

            if (result is IDictionary<string, object>)
            {
                result = new DynamicJson(result as IDictionary<string, object>);
            }
            else if (result is List<object>)
            {
                List<object> list = new List<object>();
                foreach (object item in (List<object>)result)
                {
                    if (item is IDictionary<string, object>)
                        list.Add(new DynamicJson(item as IDictionary<string, object>));
                    else
                        list.Add(item);
                }
                result = list;
            }

            return _dictionary.ContainsKey(binder.Name);
        }
    }
}
#endif

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Architect -
United Kingdom United Kingdom
Mehdi first started programming when he was 8 on BBC+128k machine in 6512 processor language, after various hardware and software changes he eventually came across .net and c# which he has been using since v1.0.
He is formally educated as a system analyst Industrial engineer, but his programming passion continues.

* Mehdi is the 5th person to get 6 out of 7 Platinum's on Code-Project (13th Jan'12)
* Mehdi is the 3rd person to get 7 out of 7 Platinum's on Code-Project (26th Aug'16)

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