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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using Pfz.Databasing.Managers;
using System.Reflection;
using System.Linq;
namespace Pfz.Databasing.Filtering
{
/// <summary>
/// Represents a group of filters, that work together by AND or OR clauses.
/// </summary>
[Serializable]
public sealed class Filter:
ICloneable<Filter>,
IEquatable<Filter>
{
/// <summary>
/// Creates the new group using the AND grouping operator.
/// </summary>
public Filter()
{
}
/// <summary>
/// Creates the new group using the given grouping operator.
/// </summary>
/// <param name="groupMode"></param>
public Filter(FilterMode groupMode)
{
GroupMode = groupMode;
}
/// <summary>
/// Gets the grouping operator used by this group.
/// </summary>
public FilterMode GroupMode { get; private set; }
internal readonly List<FilterItem> _filters = new List<FilterItem>();
internal readonly List<Filter> _subGroups = new List<Filter>();
/// <summary>
/// Gets the sub-groups.
/// </summary>
public ReadOnlyCollection<Filter> SubGroups
{
get
{
return _subGroups.AsReadOnly();
}
}
/// <summary>
/// Gets the filters.
/// </summary>
public ReadOnlyCollection<FilterItem> Filters
{
get
{
return _filters.AsReadOnly();
}
}
/// <summary>
/// Adds a new filter using the given path and value. The operator used
/// is EqualTo.
/// </summary>
public void Add(ExtendedPropertyInfoPath path, object value)
{
FilterItem filter = new FilterItem(path, FilterOperation.EqualTo, value);
_filters.Add(filter);
}
/// <summary>
/// Adds a new filter using the given property and value. The operator
/// used is EqualTo.
/// </summary>
public void Add(PropertyInfo property, object value)
{
var extendedProperty = new ExtendedPropertyInfo(property.DeclaringType, property);
var path = new ExtendedPropertyInfoPath(extendedProperty);
Add(path, value);
}
/// <summary>
/// Adds a new filter using the given path, operation and value.
/// </summary>
public void Add(ExtendedPropertyInfoPath path, FilterOperation operation, object value)
{
FilterItem filter = new FilterItem(path, operation, value);
_filters.Add(filter);
}
/// <summary>
/// Adds an existing group as a sub-group.
/// </summary>
public void AddSubGroup(Filter subGroup)
{
_subGroups.Add(subGroup);
}
/// <summary>
/// Adds a new sub-group, of type AND.
/// </summary>
public Filter AddSubGroup()
{
Filter result = new Filter();
_subGroups.Add(result);
return result;
}
/// <summary>
/// Adds a new sub-group, with the given groupMode.
/// </summary>
public Filter AddSubGroup(FilterMode groupMode)
{
Filter result = new Filter(groupMode);
_subGroups.Add(result);
return result;
}
/// <summary>
/// Clones the actual filter group.
/// </summary>
public Filter Clone()
{
Filter result = new Filter(GroupMode);
foreach(var subGroup in _subGroups)
result._subGroups.Add(subGroup.Clone());
foreach(var filter in _filters)
result._filters.Add(filter.Clone());
return result;
}
/// <summary>
/// Compares this group with another object.
/// </summary>
public override bool Equals(object obj)
{
Filter other = obj as Filter;
if (other == null)
return false;
return Equals(other);
}
/// <summary>
/// Compares this group with another group.
/// The values are ignored, as this is used to refill prepared queries.
/// </summary>
public bool Equals(Filter other)
{
if (other == null)
return false;
return _filters.SequenceEqual(other._filters) && _subGroups.SequenceEqual(other._subGroups);
}
/// <summary>
/// Gets the hashcode for this filtergroup.
/// </summary>
public override int GetHashCode()
{
unchecked
{
int result = 0;
foreach(var filter in _filters)
result ^= filter.GetHashCode();
foreach(var subGroup in _subGroups)
result ^= subGroup.GetHashCode();
return result;
}
}
object ICloneable.Clone()
{
return Clone();
}
}
}
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I started to program computers when I was 11 years old, as a hobbyist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.
At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do their work easier, faster and with less errors.
Want more info or simply want to contact me?
Take a look at:
http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com
Codeproject MVP 2012, 2015 & 2016
Microsoft MVP 2013-2014 (in October 2014 I started working at Microsoft, so I can't be a Microsoft MVP anymore).