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hOOt - full text search engine

, 11 Aug 2016 CPOL
Smallest full text search engine (lucene replacement) built from scratch using inverted WAH bitmap index, highly compact storage, operating in database and document modes
fastJSON.dll
Hoot
Properties
SampleApp
newifilter
Properties
fastJSON.dll
_svn
all-wcprops
entries
text-base
AssemblyInfo.cs.svn-base
_svn
all-wcprops
entries
text-base
ComHelper.cs.svn-base
FilterLoader.cs.svn-base
FilterReader.cs.svn-base
IFilter.cs.svn-base
_svn
all-wcprops
entries
text-base
AssemblyInfo.cs.svn-base
Resources.Designer.cs.svn-base
Resources.resx.svn-base
Settings.Designer.cs.svn-base
Settings.settings.svn-base
fastJSON.dll
fastJSON.dll
fastJSON.dll
fastJSON.dll
fastJSON
MGIndex
.gitignore
.gitignore
fastBinaryJSON
LICENSE
README.md
Tests
Properties
Tools
buildversion.exe
buildversion.ncs
LICENSE
README.md
buildversion.exe
buildversion.ncs
Hoot.dll
SampleApp.exe
Hoot.dll
SampleApp.exe
fastJSON.dll
Hoot.dll
SampleApp.exe
fastJSON.dll
Hoot.dll
SampleApp.exe
fastJSON.dll
Hoot.dll
SampleApp.exe
fastJSON.dll
Hoot.dll
SampleApp.exe
fastJSON.dll
Hoot.dll
SampleApp.exe
fastJSON.dll
Hoot.dll
SampleApp.exe
Hoot.dll
SampleApp.exe
Hoot.dll
SampleApp.exe
Hoot.dll
SampleApp.exe
Hoot.dll
SampleApp.exe
using System;
using System.Collections.Generic;
using System.Text;

namespace hOOt
{
    #region [ internal classes ]
    internal class KeyPointer
    {
        public KeyPointer(bytearr key, int recno, int duppage)
        {
            RecordNum = recno;
            Key = key;
            DuplicatesPage = duppage;
        }

        public KeyPointer(bytearr key, int recno)
        {
            RecordNum = recno;
            Key = key;
            DuplicatesPage = -1;
        }

        public bytearr Key;
        public int RecordNum;
        public int DuplicatesPage = -1;

        //public override string ToString()
        //{
        //    return "" + Key;
        //}

        public KeyPointer Copy()
        {
            return new KeyPointer(Key, RecordNum);
        }
    }

    internal struct bytearr
    {
        public bytearr(byte[] key)
        {
            val = key;
        }
        public byte[] val;

        //public override string ToString()
        //{
        //    return "" + val[0];
        //}
        public override int GetHashCode()
        {
            int result = 17;
            foreach (byte b in val)
            {
                result = result * 31 + b;
            }
            return result;
        }
    }
    #endregion


    internal class Bucket
    {
        internal int BucketNumber = -1;
        internal List<KeyPointer> Pointers = new List<KeyPointer>();
        internal List<int> Duplicates = new List<int>();
        internal int DiskPageNumber = -1;
        internal int NextPageNumber = -1;
        internal bool isDirty = false;
        internal bool isBucket = true;
        internal bool isOverflow = false;

        public Bucket(byte type, int bucketnumber, List<KeyPointer> pointers, List<int> duplicates, int diskpage, int nextpage)
        {
            DiskPageNumber = diskpage;
            BucketNumber = bucketnumber;
            NextPageNumber = nextpage;
            if ((type & 8) == 8)
                isBucket = true;
            if ((type & 16) == 16)
                isOverflow = true;
            Pointers = pointers;
            Duplicates = duplicates;
        }

        public Bucket(int page)
        {
            DiskPageNumber = page;
        }

        public short Count
        {
            get { return (short)Pointers.Count; }
        }

        //public override string ToString()
        //{
        //    return "count = " + Pointers.Count;
        //}
    }
}

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License

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

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About the Author

Mehdi Gholam
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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