Click here to Skip to main content
15,861,168 members
Articles / Web Development / HTML

RaptorDB - The Document Store

Rate me:
Please Sign up or sign in to vote.
4.96/5 (278 votes)
24 Jul 2019CPOL86 min read 2.3M   16.3K   653  
NoSql, JSON based, Document store database with compiled .net map functions and automatic hybrid bitmap indexing and LINQ query filters (now with standalone Server mode, Backup and Active Restore, Transactions, Server side queries, MonoDroid support, HQ-Branch Replication, working in Linux, .net
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.ComponentModel;

namespace RaptorDB
{
    internal class FieldPropertyDescriptor : PropertyDescriptor
    {
        private FieldInfo _field;

        public FieldPropertyDescriptor(FieldInfo field) :
            base(field.Name, (Attribute[])field.GetCustomAttributes(typeof(Attribute), true))
        {
            _field = field;
        }

        public FieldInfo Field { get { return _field; } }

        public override bool Equals(object obj)
        {
            FieldPropertyDescriptor other = obj as FieldPropertyDescriptor;
            return other != null && other._field.Equals(_field);
        }

        public override int GetHashCode() { return _field.GetHashCode(); }

        public override bool IsReadOnly { get { return false; } }
        public override void ResetValue(object component) { }
        public override bool CanResetValue(object component) { return false; }
        public override bool ShouldSerializeValue(object component) { return true; }

        public override Type ComponentType { get { return _field.DeclaringType; } }
        public override Type PropertyType { get { return _field.FieldType; } }

        public override object GetValue(object component) { return _field.GetValue(component); }

        public override void SetValue(object component, object value)
        {
            _field.SetValue(component, value);
            OnValueChanged(component, EventArgs.Empty);
        }
    }

    public abstract class BindableFields : ICustomTypeDescriptor
    {
        object ICustomTypeDescriptor.GetPropertyOwner(PropertyDescriptor pd)
        {
            return this;
        }

        AttributeCollection ICustomTypeDescriptor.GetAttributes()
        {
            return TypeDescriptor.GetAttributes(this, true);
        }

        string ICustomTypeDescriptor.GetClassName()
        {
            return TypeDescriptor.GetClassName(this, true);
        }

        string ICustomTypeDescriptor.GetComponentName()
        {
            return TypeDescriptor.GetComponentName(this, true);
        }

        TypeConverter ICustomTypeDescriptor.GetConverter()
        {
            return TypeDescriptor.GetConverter(this, true);
        }

        EventDescriptor ICustomTypeDescriptor.GetDefaultEvent()
        {
            return TypeDescriptor.GetDefaultEvent(this, true);
        }

        PropertyDescriptor ICustomTypeDescriptor.GetDefaultProperty()
        {
            return TypeDescriptor.GetDefaultProperty(this, true);
        }

        object ICustomTypeDescriptor.GetEditor(Type editorBaseType)
        {
            return TypeDescriptor.GetEditor(this, editorBaseType, true);
        }

        EventDescriptorCollection ICustomTypeDescriptor.GetEvents(Attribute[] attributes)
        {
            return TypeDescriptor.GetEvents(this, attributes, true);
        }

        EventDescriptorCollection ICustomTypeDescriptor.GetEvents()
        {
            return TypeDescriptor.GetEvents(this, true);
        }

        private PropertyDescriptorCollection _propCache;
        private FilterCache _filterCache;

        PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties()
        {
            return ((ICustomTypeDescriptor)this).GetProperties(null);
        }

        PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties(Attribute[] attributes)
        {
            bool filtering = (attributes != null && attributes.Length > 0);
            PropertyDescriptorCollection props = _propCache;
            FilterCache cache = _filterCache;

            // Use a cached version if possible
            if (filtering && cache != null && cache.IsValid(attributes))
            {
                return cache.FilteredProperties;
            }
            else if (!filtering && props != null)
            {
                return props;
            }

            // Create the property collection and filter
            props = new PropertyDescriptorCollection(null);
            foreach (PropertyDescriptor prop in TypeDescriptor.GetProperties(this, attributes, true))
            {
                props.Add(prop);
            }
            foreach (FieldInfo field in GetType().GetFields())
            {
                FieldPropertyDescriptor fieldDesc = new FieldPropertyDescriptor(field);
                if (!filtering || fieldDesc.Attributes.Contains(attributes)) props.Add(fieldDesc);
            }

            // Store the computed properties
            if (filtering)
            {
                cache = new FilterCache();
                cache.Attributes = attributes;
                cache.FilteredProperties = props;
                _filterCache = cache;
            }
            else _propCache = props;

            return props;
        }

        private class FilterCache
        {
            public Attribute[] Attributes;
            public PropertyDescriptorCollection FilteredProperties;
            public bool IsValid(Attribute[] other)
            {
                if (other == null || Attributes == null) return false;
                if (Attributes.Length != other.Length) return false;
                for (int i = 0; i < other.Length; i++)
                {
                    if (!Attributes[i].Match(other[i])) return false;
                }
                return true;
            }
        }
    }
}

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

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)

Comments and Discussions