Imported Upstream version 1.1.0upstream/1.1.0

1 files changed, 328 insertions, 0 deletions

diff --git a/src/mscorlib/src/System/Collections/ObjectModel/Collection.cs b/src/mscorlib/src/System/Collections/ObjectModel/Collection.cs
new file mode 100644
index 0000000000..54aa7bb09d
--- /dev/null
+++ b/src/mscorlib/src/System/Collections/ObjectModel/Collection.cs
@@ -0,0 +1,328 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+// 
+
+namespace System.Collections.ObjectModel
+{
+    using System;
+    using System.Collections;
+    using System.Collections.Generic;
+    using System.Diagnostics;
+    using System.Runtime;
+    
+    [Serializable]
+    [System.Runtime.InteropServices.ComVisible(false)]
+    [DebuggerTypeProxy(typeof(Mscorlib_CollectionDebugView<>))]
+    [DebuggerDisplay("Count = {Count}")]    
+    public class Collection<T>: IList<T>, IList, IReadOnlyList<T>
+    {
+        IList<T> items;
+        [NonSerialized]
+        private Object _syncRoot;
+
+        public Collection() {
+            items = new List<T>();
+        }
+
+        public Collection(IList<T> list) {
+            if (list == null) {
+                ThrowHelper.ThrowArgumentNullException(ExceptionArgument.list);
+            }
+            items = list;
+        }
+
+        public int Count {
+            get { return items.Count; }
+        }
+
+        protected IList<T> Items {
+            get { return items; }
+        }
+
+        public T this[int index] {
+            get { return items[index]; }
+            set {
+                if( items.IsReadOnly) {
+                    ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
+                }
+                
+                if (index < 0 || index >= items.Count) {
+                    ThrowHelper.ThrowArgumentOutOfRange_IndexException();
+                }
+
+                SetItem(index, value);
+            }
+        }
+
+        public void Add(T item) {
+            if( items.IsReadOnly) {
+                ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
+            }
+            
+            int index = items.Count;
+            InsertItem(index, item);
+        }
+
+        public void Clear() {
+            if( items.IsReadOnly) {
+                ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
+            }
+            
+            ClearItems();
+        }
+
+        public void CopyTo(T[] array, int index) {
+            items.CopyTo(array, index);
+        }
+
+        public bool Contains(T item) {
+            return items.Contains(item);
+        }
+
+        public IEnumerator<T> GetEnumerator() {
+            return items.GetEnumerator();
+        }
+
+        public int IndexOf(T item) {
+            return items.IndexOf(item);
+        }
+
+        public void Insert(int index, T item) {
+            if (items.IsReadOnly) {
+                ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
+            }
+
+            if (index < 0 || index > items.Count) {
+                ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.index, ExceptionResource.ArgumentOutOfRange_ListInsert);
+            }
+
+            InsertItem(index, item);
+        }
+
+        public bool Remove(T item) {
+            if( items.IsReadOnly) {
+                ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
+            }
+            
+            int index = items.IndexOf(item);
+            if (index < 0) return false;
+            RemoveItem(index);
+            return true;
+        }
+
+        public void RemoveAt(int index) {
+            if( items.IsReadOnly) {
+                ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
+            }
+
+            if (index < 0 || index >= items.Count) {
+                ThrowHelper.ThrowArgumentOutOfRange_IndexException();
+            }
+
+            RemoveItem(index);
+        }
+
+        protected virtual void ClearItems() {
+            items.Clear();
+        }
+
+        protected virtual void InsertItem(int index, T item) {
+            items.Insert(index, item);
+        }
+        
+        protected virtual void RemoveItem(int index) {
+            items.RemoveAt(index);
+        }
+
+        protected virtual void SetItem(int index, T item) {
+            items[index] = item;
+        }
+        
+        bool ICollection<T>.IsReadOnly {
+            get { 
+                return items.IsReadOnly; 
+            }
+        }
+        
+        IEnumerator IEnumerable.GetEnumerator() {
+            return ((IEnumerable)items).GetEnumerator();
+        }
+
+        bool ICollection.IsSynchronized {
+            get { return false; }
+        }
+
+        object ICollection.SyncRoot { 
+            get {                 
+                if( _syncRoot == null) {
+                    ICollection c = items as ICollection;
+                    if( c != null) {
+                        _syncRoot = c.SyncRoot;
+                    }
+                    else {
+                        System.Threading.Interlocked.CompareExchange<Object>(ref _syncRoot, new Object(), null);    
+                    }
+                }
+                return _syncRoot;                 
+            }
+        }
+
+        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.ThrowArgumentOutOfRangeException(ExceptionArgument.index, ExceptionResource.ArgumentOutOfRange_NeedNonNegNum);
+            }
+
+            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(ExceptionResource.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(ExceptionResource.Argument_InvalidArrayType);
+                }
+
+                int count = items.Count;
+                try {
+                    for (int i = 0; i < count; i++) {
+                        objects[index++] = items[i];
+                    }
+                }
+                catch(ArrayTypeMismatchException) {
+                    ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_InvalidArrayType);
+                }
+            }            
+        }
+
+        object IList.this[int index] {
+            get { return items[index]; }
+            set {
+                ThrowHelper.IfNullAndNullsAreIllegalThenThrow<T>(value, ExceptionArgument.value);
+
+                try { 
+                    this[index] = (T)value;               
+                }
+                catch (InvalidCastException) { 
+                    ThrowHelper.ThrowWrongValueTypeArgumentException(value, typeof(T));            
+                }
+
+            }
+        }
+
+        bool IList.IsReadOnly {
+            get { 
+                return items.IsReadOnly;
+            }
+        }
+
+        bool IList.IsFixedSize {
+            get { 
+                // There is no IList<T>.IsFixedSize, so we must assume that only
+                // readonly collections are fixed size, if our internal item 
+                // collection does not implement IList.  Note that Array implements
+                // IList, and therefore T[] and U[] will be fixed-size.
+                IList list = items as IList;
+                if(list != null)
+                {
+                    return list.IsFixedSize;
+                }
+                return items.IsReadOnly;
+            }
+        }
+
+        int IList.Add(object value) {
+            if( items.IsReadOnly) {
+                ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
+            }
+            ThrowHelper.IfNullAndNullsAreIllegalThenThrow<T>(value, ExceptionArgument.value);
+            
+            try { 
+                Add((T)value);
+            }
+            catch (InvalidCastException) { 
+                ThrowHelper.ThrowWrongValueTypeArgumentException(value, typeof(T));            
+            }   
+            
+            return this.Count - 1;
+        }
+
+        bool IList.Contains(object value) {
+            if(IsCompatibleObject(value)) {
+                return Contains((T) value);
+            }
+            return false;
+        }
+
+        int IList.IndexOf(object value) {  
+            if(IsCompatibleObject(value)) {
+                return IndexOf((T)value);
+            }             
+            return -1;
+        }
+
+        void IList.Insert(int index, object value) {
+            if( items.IsReadOnly) {
+                ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
+            }
+            ThrowHelper.IfNullAndNullsAreIllegalThenThrow<T>(value, ExceptionArgument.value);
+            
+            try { 
+                Insert(index, (T)value);
+            }
+            catch (InvalidCastException) { 
+                ThrowHelper.ThrowWrongValueTypeArgumentException(value, typeof(T));            
+            } 
+
+        }
+
+        void IList.Remove(object value) {
+            if( items.IsReadOnly) {
+                ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection);
+            }
+
+            if(IsCompatibleObject(value)) {
+                Remove((T) value);
+            }             
+        }
+
+        private static bool IsCompatibleObject(object value) {
+            // Non-null values are fine.  Only accept nulls if T is a class or Nullable<U>.
+            // Note that default(T) is not equal to null for value types except when T is Nullable<U>. 
+            return ((value is T) || (value == null && default(T) == null));
+        }
+    }
+}