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luosheng
361
Technosoftware/DaAeHdaClient/OpcWriteableCollection.cs
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361
Technosoftware/DaAeHdaClient/OpcWriteableCollection.cs
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#region Copyright (c) 2011-2023 Technosoftware GmbH. All rights reserved
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//-----------------------------------------------------------------------------
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// Copyright (c) 2011-2023 Technosoftware GmbH. All rights reserved
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// Web: https://www.technosoftware.com
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//
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// The source code in this file is covered under a dual-license scenario:
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// - Owner of a purchased license: SCLA 1.0
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// - GPL V3: everybody else
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//
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// SCLA license terms accompanied with this source code.
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// See SCLA 1.0: https://technosoftware.com/license/Source_Code_License_Agreement.pdf
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//
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// GNU General Public License as published by the Free Software Foundation;
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// version 3 of the License are accompanied with this source code.
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// See https://technosoftware.com/license/GPLv3License.txt
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//
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// This source code is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE.
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//-----------------------------------------------------------------------------
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#endregion Copyright (c) 2011-2023 Technosoftware GmbH. All rights reserved
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#region Using Directives
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using System;
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using System.Collections;
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using System.Runtime.Serialization;
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#endregion
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namespace Technosoftware.DaAeHdaClient
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{
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/// <summary>
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/// A writeable collection class which can be used to expose arrays as properties of classes.
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/// </summary>
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[Serializable]
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public class OpcWriteableCollection : ICollection, IList, ICloneable, ISerializable
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{
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#region Fields
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private ArrayList _array;
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private Type _elementType;
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#endregion
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#region Public Interface
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/// <summary>
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/// An indexer for the collection.
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/// </summary>
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public virtual object this[int index]
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{
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get => _array[index];
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set => _array[index] = value;
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}
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/// <summary>
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/// Returns a copy of the collection as an array.
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/// </summary>
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public virtual Array ToArray()
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{
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return _array.ToArray(_elementType);
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}
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/// <summary>
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/// Adds a list of values to the collection.
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/// </summary>
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public virtual void AddRange(ICollection collection)
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{
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if (collection != null)
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{
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foreach (var element in collection)
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{
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ValidateElement(element);
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}
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_array.AddRange(collection);
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}
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}
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#endregion
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#region Protected Interface
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/// <summary>
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/// Creates a collection that wraps the specified array instance.
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/// </summary>
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protected OpcWriteableCollection(ICollection array, Type elementType)
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{
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// copy array.
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if (array != null)
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{
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_array = new ArrayList(array);
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}
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else
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{
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_array = new ArrayList();
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}
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// set default element type.
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_elementType = typeof(object);
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// verify that current contents of the array are the correct type.
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if (elementType != null)
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{
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foreach (var element in _array)
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{
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ValidateElement(element);
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}
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_elementType = elementType;
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}
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}
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/// <summary>
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/// The array instance exposed by the collection.
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/// </summary>
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protected virtual ArrayList Array
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{
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get => _array;
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set
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{
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_array = value;
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if (_array == null)
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{
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_array = new ArrayList();
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}
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}
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}
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/// <summary>
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/// The type of objects allowed in the collection.
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/// </summary>
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protected virtual Type ElementType
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{
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get => _elementType;
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set
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{
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// verify that current contents of the array are the correct type.
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foreach (var element in _array)
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{
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ValidateElement(element);
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}
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_elementType = value;
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}
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}
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/// <summary>
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/// Throws an exception if the element is not valid for the collection.
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/// </summary>
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protected virtual void ValidateElement(object element)
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{
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if (element == null)
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{
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throw new ArgumentException(string.Format(INVALID_VALUE, element));
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}
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if (!_elementType.IsInstanceOfType(element))
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{
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throw new ArgumentException(string.Format(INVALID_TYPE, element.GetType()));
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}
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}
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/// <remarks/>
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protected const string INVALID_VALUE = "The value '{0}' cannot be added to the collection.";
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/// <remarks/>
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protected const string INVALID_TYPE = "A value with type '{0}' cannot be added to the collection.";
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#endregion
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#region ISerializable Members
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/// <summary>
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/// A set of names for fields used in serialization.
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/// </summary>
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private class Names
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{
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internal const string COUNT = "CT";
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internal const string ELEMENT = "EL";
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internal const string ELEMENT_TYPE = "ET";
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}
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/// <summary>
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/// Contructs a server by de-serializing its OpcUrl from the stream.
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/// </summary>
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protected OpcWriteableCollection(SerializationInfo info, StreamingContext context)
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{
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_elementType = (Type)info.GetValue(Names.ELEMENT_TYPE, typeof(Type));
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var count = (int)info.GetValue(Names.COUNT, typeof(int));
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_array = new ArrayList(count);
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for (var ii = 0; ii < count; ii++)
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{
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_array.Add(info.GetValue(Names.ELEMENT + ii.ToString(), typeof(object)));
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}
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}
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/// <summary>
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/// Serializes a server into a stream.
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/// </summary>
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public virtual void GetObjectData(SerializationInfo info, StreamingContext context)
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{
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info.AddValue(Names.ELEMENT_TYPE, _elementType);
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info.AddValue(Names.COUNT, _array.Count);
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for (var ii = 0; ii < _array.Count; ii++)
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{
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info.AddValue(Names.ELEMENT + ii.ToString(), _array[ii]);
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}
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}
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#endregion
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#region ICollection Members
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/// <summary>
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/// Indicates whether access to the ICollection is synchronized (thread-safe).
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/// </summary>
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public virtual bool IsSynchronized => false;
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/// <summary>
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/// Gets the number of objects in the collection.
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/// </summary>
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public virtual int Count => _array.Count;
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/// <summary>
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/// Copies the objects to an Array, starting at a the specified index.
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/// </summary>
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/// <param name="array">The one-dimensional Array that is the destination for the objects.</param>
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/// <param name="index">The zero-based index in the Array at which copying begins.</param>
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public virtual void CopyTo(Array array, int index)
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{
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if (_array != null)
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{
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_array.CopyTo(array, index);
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}
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}
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/// <summary>
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/// Indicates whether access to the ICollection is synchronized (thread-safe).
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/// </summary>
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public virtual object SyncRoot => this;
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#endregion
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#region IEnumerable Members
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/// <summary>
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/// Returns an enumerator that can iterate through a collection.
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/// </summary>
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/// <returns>An IEnumerator that can be used to iterate through the collection.</returns>
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public IEnumerator GetEnumerator()
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{
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return _array.GetEnumerator();
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}
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#endregion
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#region IList Members
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/// <summary>
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/// Gets a value indicating whether the collection is read-only.
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/// </summary>
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public virtual bool IsReadOnly => false;
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/// <summary>
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/// Gets or sets the element at the specified index.
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/// </summary>
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object IList.this[int index]
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{
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get => this[index];
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set => this[index] = value;
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}
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/// <summary>
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/// Removes the IList item at the specified index.
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/// </summary>
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/// <param name="index">The zero-based index of the item to remove.</param>
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public virtual void RemoveAt(int index)
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{
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_array.RemoveAt(index);
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}
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/// <summary>
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/// Inserts an item to the IList at the specified position.
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/// </summary>
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/// <param name="index">The zero-based index at which value should be inserted.</param>
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/// <param name="value">The Object to insert into the IList. </param>
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public virtual void Insert(int index, object value)
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{
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ValidateElement(value);
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_array.Insert(index, value);
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}
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/// <summary>
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/// Removes the first occurrence of a specific object from the IList.
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/// </summary>
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/// <param name="value">The Object to remove from the IList.</param>
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public virtual void Remove(object value)
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{
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_array.Remove(value);
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}
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/// <summary>
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/// Determines whether the IList contains a specific value.
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/// </summary>
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/// <param name="value">The Object to locate in the IList.</param>
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/// <returns>true if the Object is found in the IList; otherwise, false.</returns>
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public virtual bool Contains(object value)
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{
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return _array.Contains(value);
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}
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/// <summary>
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/// Removes all items from the IList.
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/// </summary>
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public virtual void Clear()
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{
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_array.Clear();
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}
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/// <summary>
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/// Determines the index of a specific item in the IList.
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/// </summary>
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/// <param name="value">The Object to locate in the IList.</param>
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/// <returns>The index of value if found in the list; otherwise, -1.</returns>
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public virtual int IndexOf(object value)
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{
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return _array.IndexOf(value);
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}
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/// <summary>
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/// Adds an item to the IList.
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/// </summary>
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/// <param name="value">The Object to add to the IList. </param>
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/// <returns>The position into which the new element was inserted.</returns>
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public virtual int Add(object value)
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{
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ValidateElement(value);
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return _array.Add(value);
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}
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/// <summary>
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/// Indicates whether the IList has a fixed size.
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/// </summary>
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public virtual bool IsFixedSize => false;
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#endregion
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#region ICloneable Members
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/// <summary>
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/// Creates a deep copy of the collection.
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/// </summary>
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public virtual object Clone()
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{
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var clone = (OpcWriteableCollection)MemberwiseClone();
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clone._array = new ArrayList();
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for (var ii = 0; ii < _array.Count; ii++)
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{
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clone.Add(OpcConvert.Clone(_array[ii]));
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}
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return clone;
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}
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#endregion
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}
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}
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