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// Copyright 2009-2022 Josh Close
// This file is a part of CsvHelper and is dual licensed under MS-PL and Apache 2.0.
// See LICENSE.txt for details or visit http://www.opensource.org/licenses/ms-pl.html for MS-PL and http://opensource.org/licenses/Apache-2.0 for Apache 2.0.
// https://github.com/JoshClose/CsvHelper
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
namespace CsvHelper.Configuration
{
/// <summary>
/// A collection that holds <see cref="MemberMap"/>'s.
/// </summary>
[DebuggerDisplay("Count = {list.Count}")]
public class MemberMapCollection : IList<MemberMap>
{
private readonly List<MemberMap> list = new List<MemberMap>();
private readonly IComparer<MemberMap> comparer;
/// <summary>
/// Gets the number of elements contained in the <see cref="T:System.Collections.Generic.ICollection`1"/>.
/// </summary>
/// <returns>
/// The number of elements contained in the <see cref="T:System.Collections.Generic.ICollection`1"/>.
/// </returns>
public virtual int Count => list.Count;
/// <summary>
/// Gets a value indicating whether the <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only.
/// </summary>
/// <returns>
/// true if the <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only; otherwise, false.
/// </returns>
public virtual bool IsReadOnly => false;
/// <summary>
/// Initializes a new instance of the <see cref="MemberMapCollection"/> class.
/// </summary>
public MemberMapCollection() : this(new MemberMapComparer()) { }
/// <summary>
/// Initializes a new instance of the <see cref="MemberMapCollection"/> class.
/// </summary>
/// <param name="comparer">The comparer to use when sorting the member maps.</param>
public MemberMapCollection(IComparer<MemberMap> comparer)
{
this.comparer = comparer;
}
/// <summary>
/// Returns an enumerator that iterates through the collection.
/// </summary>
/// <returns>
/// A <see cref="T:System.Collections.Generic.IEnumerator`1"/> that can be used to iterate through the collection.
/// </returns>
/// <filterpriority>1</filterpriority>
public virtual IEnumerator<MemberMap> GetEnumerator()
{
return list.GetEnumerator();
}
/// <summary>
/// Returns an enumerator that iterates through a collection.
/// </summary>
/// <returns>
/// An <see cref="T:System.Collections.IEnumerator"/> object that can be used to iterate through the collection.
/// </returns>
/// <filterpriority>2</filterpriority>
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
/// <summary>
/// Adds an item to the <see cref="T:System.Collections.Generic.ICollection`1"/>.
/// </summary>
/// <param name="item">The object to add to the <see cref="T:System.Collections.Generic.ICollection`1"/>.
/// </param><exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only.
/// </exception>
public virtual void Add(MemberMap item)
{
list.Add(item);
list.Sort(comparer);
}
/// <summary>
/// Adds a range of items to the <see cref="T:System.Collections.Generic.ICollection`1"/>.
/// </summary>
/// <param name="collection">The collection to add.</param>
public virtual void AddRange(ICollection<MemberMap> collection)
{
list.AddRange(collection);
list.Sort(comparer);
}
/// <summary>
/// Removes all items from the <see cref="T:System.Collections.Generic.ICollection`1"/>.
/// </summary>
/// <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only.
/// </exception>
public virtual void Clear()
{
list.Clear();
}
/// <summary>
/// Determines whether the <see cref="T:System.Collections.Generic.ICollection`1"/> contains a specific value.
/// </summary>
/// <returns>
/// true if <paramref name="item"/> is found in the <see cref="T:System.Collections.Generic.ICollection`1"/>; otherwise, false.
/// </returns>
/// <param name="item">The object to locate in the <see cref="T:System.Collections.Generic.ICollection`1"/>.
/// </param>
public virtual bool Contains(MemberMap item)
{
return list.Contains(item);
}
/// <summary>
/// Copies the elements of the <see cref="T:System.Collections.Generic.ICollection`1"/> to an <see cref="T:System.Array"/>, starting at a particular <see cref="T:System.Array"/> index.
/// </summary>
/// <param name="array">The one-dimensional <see cref="T:System.Array"/> that is the destination of the elements copied from <see cref="T:System.Collections.Generic.ICollection`1"/>. The <see cref="T:System.Array"/> must have zero-based indexing.</param><param name="arrayIndex">The zero-based index in <paramref name="array"/> at which copying begins.</param><exception cref="T:System.ArgumentNullException"><paramref name="array"/> is null.</exception><exception cref="T:System.ArgumentOutOfRangeException"><paramref name="arrayIndex"/> is less than 0.</exception><exception cref="T:System.ArgumentException">The number of elements in the source <see cref="T:System.Collections.Generic.ICollection`1"/> is greater than the available space from <paramref name="arrayIndex"/> to the end of the destination <paramref name="array"/>.</exception>
public virtual void CopyTo(MemberMap[] array, int arrayIndex)
{
list.CopyTo(array, arrayIndex);
}
/// <summary>
/// Removes the first occurrence of a specific object from the <see cref="T:System.Collections.Generic.ICollection`1"/>.
/// </summary>
/// <returns>
/// true if <paramref name="item"/> was successfully removed from the <see cref="T:System.Collections.Generic.ICollection`1"/>; otherwise, false. This method also returns false if <paramref name="item"/> is not found in the original <see cref="T:System.Collections.Generic.ICollection`1"/>.
/// </returns>
/// <param name="item">The object to remove from the <see cref="T:System.Collections.Generic.ICollection`1"/>.
/// </param><exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only.
/// </exception>
public virtual bool Remove(MemberMap item)
{
return list.Remove(item);
}
/// <summary>
/// Determines the index of a specific item in the <see cref="T:System.Collections.Generic.IList`1"/>.
/// </summary>
/// <returns>
/// The index of <paramref name="item"/> if found in the list; otherwise, -1.
/// </returns>
/// <param name="item">The object to locate in the <see cref="T:System.Collections.Generic.IList`1"/>.
/// </param>
public virtual int IndexOf(MemberMap item)
{
return list.IndexOf(item);
}
/// <summary>
/// Inserts an item to the <see cref="T:System.Collections.Generic.IList`1"/> at the specified index.
/// </summary>
/// <param name="index">The zero-based index at which <paramref name="item"/> should be inserted.
/// </param><param name="item">The object to insert into the <see cref="T:System.Collections.Generic.IList`1"/>.
/// </param><exception cref="T:System.ArgumentOutOfRangeException"><paramref name="index"/> is not a valid index in the <see cref="T:System.Collections.Generic.IList`1"/>.
/// </exception><exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.IList`1"/> is read-only.
/// </exception>
public virtual void Insert(int index, MemberMap item)
{
list.Insert(index, item);
}
/// <summary>
/// Removes the <see cref="T:System.Collections.Generic.IList`1"/> item at the specified index.
/// </summary>
/// <param name="index">The zero-based index of the item to remove.
/// </param><exception cref="T:System.ArgumentOutOfRangeException"><paramref name="index"/> is not a valid index in the <see cref="T:System.Collections.Generic.IList`1"/>.
/// </exception><exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.IList`1"/> is read-only.
/// </exception>
public virtual void RemoveAt(int index)
{
list.RemoveAt(index);
}
/// <summary>
/// Gets or sets the element at the specified index.
/// </summary>
/// <returns>
/// The element at the specified index.
/// </returns>
/// <param name="index">The zero-based index of the element to get or set.
/// </param><exception cref="T:System.ArgumentOutOfRangeException"><paramref name="index"/> is not a valid index in the <see cref="T:System.Collections.Generic.IList`1"/>.
/// </exception><exception cref="T:System.NotSupportedException">The member is set and the <see cref="T:System.Collections.Generic.IList`1"/> is read-only.
/// </exception>
public virtual MemberMap this[int index]
{
get { return list[index]; }
set { list[index] = value; }
}
/// <summary>
/// Finds the <see cref="MemberMap"/> using the given member expression.
/// </summary>
/// <typeparam name="T">The <see cref="System.Type"/> the member is on.</typeparam>
/// <param name="expression">The member expression.</param>
/// <returns>The <see cref="MemberMap"/> for the given expression, or null if not found.</returns>
public virtual MemberMap? Find<T>(Expression<Func<T, object>> expression)
{
var member = ReflectionHelper.GetMember(expression);
return Find(member);
}
/// <summary>
/// Finds the <see cref="MemberMap"/> using the given member.
/// </summary>
/// <param name="member">The member.</param>
/// <returns>The <see cref="MemberMap"/> for the given expression, or null if not found.</returns>
public virtual MemberMap? Find(MemberInfo member)
{
var existingMap = list.SingleOrDefault(m =>
m.Data.Member == member ||
m.Data.Member != null &&
m.Data.Member.Name == member.Name &&
(
m.Data.Member.DeclaringType.IsAssignableFrom(member.DeclaringType) ||
member.DeclaringType.IsAssignableFrom(m.Data.Member.DeclaringType)
)
);
return existingMap;
}
/// <summary>
/// Adds the members from the mapping. This will recursively
/// traverse the mapping tree and add all members for
/// reference maps.
/// </summary>
/// <param name="mapping">The mapping where the members are added from.</param>
public virtual void AddMembers(ClassMap mapping)
{
AddRange(mapping.MemberMaps);
foreach (var refmap in mapping.ReferenceMaps)
{
AddMembers(refmap.Data.Mapping);
}
}
}
}
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