private void AddKey(TKey key, TItem item)
{
if (dict != null)
{
dict.Add(key, item);
}
else if (keyCount == threshold)
{
CreateDictionary();
dict.Add(key, item);
}
else
{
if (Contains(key))
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_AddingDuplicate);
}
keyCount++;
}
}
public bool Contains(TKey key)
{
if (key == null)
{
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.key);
}
if (dict != null)
{
return(dict.ContainsKey(key));
}
foreach (TItem item in Items)
{
if (comparer.Equals(GetKeyForItem(item), key))
{
return(true);
}
}
return(false);
}
protected KeyedCollection(IEqualityComparer <TKey> comparer, int dictionaryCreationThreshold)
: base(new List <TItem>()) // Be explicit about the use of List<T> so we can foreach over
// Items internally without enumerator allocations.
{
if (comparer == null)
{
comparer = EqualityComparer <TKey> .Default;
}
if (dictionaryCreationThreshold == -1)
{
dictionaryCreationThreshold = int.MaxValue;
}
if (dictionaryCreationThreshold < -1)
{
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.dictionaryCreationThreshold, ExceptionResource.ArgumentOutOfRange_InvalidThreshold);
}
this.comparer = comparer;
this.threshold = dictionaryCreationThreshold;
}
protected void ChangeItemKey(TItem item, TKey newKey)
{
// check if the item exists in the collection
if (!ContainsItem(item))
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_ItemNotExist);
}
TKey oldKey = GetKeyForItem(item);
if (!comparer.Equals(oldKey, newKey))
{
if (newKey != null)
{
AddKey(newKey, item);
}
if (oldKey != null)
{
RemoveKey(oldKey);
}
}
}
public TItem this[TKey key] {
get {
if (key == null)
{
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.key);
}
if (dict != null)
{
return(dict[key]);
}
foreach (TItem item in Items)
{
if (comparer.Equals(GetKeyForItem(item), key))
{
return(item);
}
}
ThrowHelper.ThrowKeyNotFoundException();
return(default(TItem));
}
}
void ICollection <TKey> .Add(TKey item)
{
ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
}
void ICollection.CopyTo(Array array, int index)
{
if (array == null)
{
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.array);
}
if (array.Rank != 1)
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_RankMultiDimNotSupported);
}
if (array.GetLowerBound(0) != 0)
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_NonZeroLowerBound);
}
if (index < 0 || index > array.Length)
{
ThrowHelper.ThrowIndexArgumentOutOfRange_NeedNonNegNumException();
}
if (array.Length - index < Count)
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
}
KeyValuePair <TKey, TValue>[] pairs = array as KeyValuePair <TKey, TValue>[];
if (pairs != null)
{
m_dictionary.CopyTo(pairs, index);
}
else
{
DictionaryEntry[] dictEntryArray = array as DictionaryEntry[];
if (dictEntryArray != null)
{
foreach (var item in m_dictionary)
{
dictEntryArray[index++] = new DictionaryEntry(item.Key, item.Value);
}
}
else
{
object[] objects = array as object[];
if (objects == null)
{
ThrowHelper.ThrowArgumentException_Argument_InvalidArrayType();
}
try
{
foreach (var item in m_dictionary)
{
objects[index++] = new KeyValuePair <TKey, TValue>(item.Key, item.Value);
}
}
catch (ArrayTypeMismatchException)
{
ThrowHelper.ThrowArgumentException_Argument_InvalidArrayType();
}
}
}
}
void IDictionary.Remove(object key)
{
ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
}
void IDictionary.Clear()
{
ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
}
void IDictionary.Add(object key, object value)
{
ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
}
// Abstracted away to avoid redundant implementations.
internal static void CopyToNonGenericICollectionHelper <T>(ICollection <T> collection, Array array, int index)
{
if (array == null)
{
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.array);
}
if (array.Rank != 1)
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_RankMultiDimNotSupported);
}
if (array.GetLowerBound(0) != 0)
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_NonZeroLowerBound);
}
if (index < 0)
{
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.arrayIndex, ExceptionResource.ArgumentOutOfRange_NeedNonNegNum);
}
if (array.Length - index < collection.Count)
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
}
// Easy out if the ICollection<T> implements the non-generic ICollection
ICollection nonGenericCollection = collection as ICollection;
if (nonGenericCollection != null)
{
nonGenericCollection.CopyTo(array, index);
return;
}
T[] items = array as T[];
if (items != null)
{
collection.CopyTo(items, index);
}
else
{
//
// Catch the obvious case assignment will fail.
// We can found all possible problems by doing the check though.
// For example, if the element type of the Array is derived from T,
// we can't figure out if we can successfully copy the element beforehand.
//
Type targetType = array.GetType().GetElementType();
Type sourceType = typeof(T);
if (!(targetType.IsAssignableFrom(sourceType) || sourceType.IsAssignableFrom(targetType)))
{
ThrowHelper.ThrowArgumentException_Argument_InvalidArrayType();
}
//
// We can't cast array of value type to object[], so we don't support
// widening of primitive types here.
//
object[] objects = array as object[];
if (objects == null)
{
ThrowHelper.ThrowArgumentException_Argument_InvalidArrayType();
}
try
{
foreach (var item in collection)
{
objects[index++] = item;
}
}
catch (ArrayTypeMismatchException)
{
ThrowHelper.ThrowArgumentException_Argument_InvalidArrayType();
}
}
}
bool IDictionary <TKey, TValue> .Remove(TKey key)
{
ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
return(false);
}
void IDictionary <TKey, TValue> .Add(TKey key, TValue value)
{
ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
}
void ICollection <TValue> .Clear()
{
ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
}
void ICollection <KeyValuePair <TKey, TValue> > .Add(KeyValuePair <TKey, TValue> item)
{
ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
}
bool ICollection <TValue> .Remove(TValue item)
{
ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
return(false);
}
bool ICollection <KeyValuePair <TKey, TValue> > .Remove(KeyValuePair <TKey, TValue> item)
{
ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
return(false);
}
public Collection(IList<T> list) {
if (list == null) {
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.list);
}
items = list;
}
void ICollection.CopyTo(Array array, int index)
{
if (array == null)
{
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.array);
}
if (array.Rank != 1)
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_RankMultiDimNotSupported);
}
if (array.GetLowerBound(0) != 0)
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_NonZeroLowerBound);
}
if (index < 0)
{
ThrowHelper.ThrowIndexArgumentOutOfRange_NeedNonNegNumException();
}
if (array.Length - index < Count)
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
}
T[] tArray = array as T[];
if (tArray != null)
{
items.CopyTo(tArray, index);
}
else
{
//
// Catch the obvious case assignment will fail.
// We can found all possible problems by doing the check though.
// For example, if the element type of the Array is derived from T,
// we can't figure out if we can successfully copy the element beforehand.
//
Type targetType = array.GetType().GetElementType();
Type sourceType = typeof(T);
if (!(targetType.IsAssignableFrom(sourceType) || sourceType.IsAssignableFrom(targetType)))
{
ThrowHelper.ThrowArgumentException_Argument_InvalidArrayType();
}
//
// We can't cast array of value type to object[], so we don't support
// widening of primitive types here.
//
object[] objects = array as object[];
if (objects == null)
{
ThrowHelper.ThrowArgumentException_Argument_InvalidArrayType();
}
int count = items.Count;
try
{
for (int i = 0; i < count; i++)
{
objects[index++] = items[i];
}
}
catch (ArrayTypeMismatchException)
{
ThrowHelper.ThrowArgumentException_Argument_InvalidArrayType();
}
}
}
