ReadOnlyMetadataCollection.cs source code in C# .NET

                        Code:
                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntity / System / Data / Metadata / Edm / ReadOnlyMetadataCollection.cs / 2 / ReadOnlyMetadataCollection.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
 
using System;
using System.Collections; 
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Data.Common;
using System.Diagnostics; 
using System.Reflection;
using System.Text; 
 
namespace System.Data.Metadata.Edm
{ 
    /// 
    /// Class representing a read-only wrapper around MetadataCollection
    /// 
    /// The type of items in this collection 
    public class ReadOnlyMetadataCollection : System.Collections.ObjectModel.ReadOnlyCollection where T : MetadataItem
    { 
        #region Constructors 
        /// 
        /// The constructor for constructing a read-only metadata collection to wrap another MetadataCollection. 
        /// 
        /// The metadata collection to wrap
        /// Thrown if collection argument is null
        internal ReadOnlyMetadataCollection(IList collection) : base(collection) 
        {
        } 
        #endregion 

        #region InnerClasses 
        // On the surface, this Enumerator doesn't do anything but delegating to the underlying enumerator

        /// 
        /// The enumerator for MetadataCollection 
        /// 
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1815:OverrideEqualsAndOperatorEqualsOnValueTypes")] 
        public struct Enumerator : IEnumerator 
        {
            ///  
            /// Constructor for the enumerator
            /// 
            /// The collection that this enumerator should enumerate on
            internal Enumerator(IList collection) 
            {
                _parent = collection; 
                _nextIndex = 0; 
                _current = null;
            } 

            private int _nextIndex;
            private IList _parent;
            private T _current; 

            ///  
            /// Gets the member at the current position 
            /// 
            public T Current 
            {
                get
                {
                    return _current; 
                }
            } 
 
            /// 
            /// Gets the member at the current position 
            /// 
            object IEnumerator.Current
            {
                get 
                {
                    return this.Current; 
                } 
            }
 
            /// 
            /// Dispose this enumerator
            /// 
            public void Dispose() 
            {
            } 
 
            /// 
            /// Move to the next member in the collection 
            /// 
            /// True if the enumerator is moved
            public bool MoveNext()
            { 
                if ((uint)_nextIndex < (uint)_parent.Count)
                { 
                    _current = _parent[_nextIndex]; 
                    _nextIndex++;
                    return true; 
                }

                _current = null;
                return false; 
            }
 
            ///  
            /// Sets the enumerator to the initial position before the first member
            ///  
            public void Reset()
            {
                _current = null;
                _nextIndex = 0; 
            }
        } 
        #endregion 

        #region Properties 
        /// 
        /// Gets whether the collection is a readonly collection
        /// 
        public bool IsReadOnly 
        {
            get 
            { 
                return true;
            } 
        }

        /// 
        /// Gets an item from the collection with the given identity 
        /// 
        /// The identity of the item to search for 
        /// An item from the collection 
        /// Thrown if identity argument passed in is null
        /// Thrown if setter is called 
        public virtual T this[string identity]
        {
            get
            { 
                return (((MetadataCollection)this.Items)[identity]);
            } 
        } 

        ///  
        /// Returns the metadata collection over which this collection is the view
        /// 
        internal MetadataCollection Source
        { 
            get
            { 
                return (MetadataCollection)this.Items; 
            }
        } 
        #endregion

        #region Methods
        ///  
        /// Gets an item from the collection with the given identity
        ///  
        /// The identity of the item to search for 
        /// Whether case is ignore in the search
        /// An item from the collection 
        /// Thrown if identity argument passed in is null
        /// Thrown if the Collection does not have an item with the given identity
        public virtual T GetValue(string identity, bool ignoreCase)
        { 
            return ((MetadataCollection)this.Items).GetValue(identity, ignoreCase);
        } 
 
        /// 
        /// Determines if this collection contains an item of the given identity 
        /// 
        /// The identity of the item to check for
        /// True if the collection contains the item with the given identity
        /// Thrown if identity argument passed in is null 
        /// Thrown if identity argument passed in is empty string
        public virtual bool Contains(string identity) 
        { 
            return ((MetadataCollection)this.Items).ContainsIdentity(identity);
        } 

        /// 
        /// Gets an item from the collection with the given identity
        ///  
        /// The identity of the item to search for
        /// Whether case is ignore in the search 
        /// An item from the collection, null if the item is not found 
        /// True an item is retrieved
        /// if identity argument is null 
        public virtual bool TryGetValue(string identity, bool ignoreCase, out T item)
        {
            return ((MetadataCollection)this.Items).TryGetValue(identity, ignoreCase, out item);
        } 

 
        ///  
        /// Gets the enumerator over this collection
        ///  
        /// 
        public new Enumerator GetEnumerator()
        {
            return new Enumerator(this.Items); 
        }
 
        ///  
        /// Workaround for bug
        ///  
        /// 
        /// 
        public new virtual int IndexOf(T value)
        { 
            return base.IndexOf(value);
        } 
 
        #endregion
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
 
using System;
using System.Collections; 
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Data.Common;
using System.Diagnostics; 
using System.Reflection;
using System.Text; 
 
namespace System.Data.Metadata.Edm
{ 
    /// 
    /// Class representing a read-only wrapper around MetadataCollection
    /// 
    /// The type of items in this collection 
    public class ReadOnlyMetadataCollection : System.Collections.ObjectModel.ReadOnlyCollection where T : MetadataItem
    { 
        #region Constructors 
        /// 
        /// The constructor for constructing a read-only metadata collection to wrap another MetadataCollection. 
        /// 
        /// The metadata collection to wrap
        /// Thrown if collection argument is null
        internal ReadOnlyMetadataCollection(IList collection) : base(collection) 
        {
        } 
        #endregion 

        #region InnerClasses 
        // On the surface, this Enumerator doesn't do anything but delegating to the underlying enumerator

        /// 
        /// The enumerator for MetadataCollection 
        /// 
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1815:OverrideEqualsAndOperatorEqualsOnValueTypes")] 
        public struct Enumerator : IEnumerator 
        {
            ///  
            /// Constructor for the enumerator
            /// 
            /// The collection that this enumerator should enumerate on
            internal Enumerator(IList collection) 
            {
                _parent = collection; 
                _nextIndex = 0; 
                _current = null;
            } 

            private int _nextIndex;
            private IList _parent;
            private T _current; 

            ///  
            /// Gets the member at the current position 
            /// 
            public T Current 
            {
                get
                {
                    return _current; 
                }
            } 
 
            /// 
            /// Gets the member at the current position 
            /// 
            object IEnumerator.Current
            {
                get 
                {
                    return this.Current; 
                } 
            }
 
            /// 
            /// Dispose this enumerator
            /// 
            public void Dispose() 
            {
            } 
 
            /// 
            /// Move to the next member in the collection 
            /// 
            /// True if the enumerator is moved
            public bool MoveNext()
            { 
                if ((uint)_nextIndex < (uint)_parent.Count)
                { 
                    _current = _parent[_nextIndex]; 
                    _nextIndex++;
                    return true; 
                }

                _current = null;
                return false; 
            }
 
            ///  
            /// Sets the enumerator to the initial position before the first member
            ///  
            public void Reset()
            {
                _current = null;
                _nextIndex = 0; 
            }
        } 
        #endregion 

        #region Properties 
        /// 
        /// Gets whether the collection is a readonly collection
        /// 
        public bool IsReadOnly 
        {
            get 
            { 
                return true;
            } 
        }

        /// 
        /// Gets an item from the collection with the given identity 
        /// 
        /// The identity of the item to search for 
        /// An item from the collection 
        /// Thrown if identity argument passed in is null
        /// Thrown if setter is called 
        public virtual T this[string identity]
        {
            get
            { 
                return (((MetadataCollection)this.Items)[identity]);
            } 
        } 

        ///  
        /// Returns the metadata collection over which this collection is the view
        /// 
        internal MetadataCollection Source
        { 
            get
            { 
                return (MetadataCollection)this.Items; 
            }
        } 
        #endregion

        #region Methods
        ///  
        /// Gets an item from the collection with the given identity
        ///  
        /// The identity of the item to search for 
        /// Whether case is ignore in the search
        /// An item from the collection 
        /// Thrown if identity argument passed in is null
        /// Thrown if the Collection does not have an item with the given identity
        public virtual T GetValue(string identity, bool ignoreCase)
        { 
            return ((MetadataCollection)this.Items).GetValue(identity, ignoreCase);
        } 
 
        /// 
        /// Determines if this collection contains an item of the given identity 
        /// 
        /// The identity of the item to check for
        /// True if the collection contains the item with the given identity
        /// Thrown if identity argument passed in is null 
        /// Thrown if identity argument passed in is empty string
        public virtual bool Contains(string identity) 
        { 
            return ((MetadataCollection)this.Items).ContainsIdentity(identity);
        } 

        /// 
        /// Gets an item from the collection with the given identity
        ///  
        /// The identity of the item to search for
        /// Whether case is ignore in the search 
        /// An item from the collection, null if the item is not found 
        /// True an item is retrieved
        /// if identity argument is null 
        public virtual bool TryGetValue(string identity, bool ignoreCase, out T item)
        {
            return ((MetadataCollection)this.Items).TryGetValue(identity, ignoreCase, out item);
        } 

 
        ///  
        /// Gets the enumerator over this collection
        ///  
        /// 
        public new Enumerator GetEnumerator()
        {
            return new Enumerator(this.Items); 
        }
 
        ///  
        /// Workaround for bug
        ///  
        /// 
        /// 
        public new virtual int IndexOf(T value)
        { 
            return base.IndexOf(value);
        } 
 
        #endregion
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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ReadOnlyMetadataCollection.cs source code in C# .NET

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