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// NAnt - A .NET build tool
// Copyright (C) 2001 Gerry Shaw
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Gerry Shaw (gerry_shaw@yahoo.com)
namespace SourceForge.NAnt {
using System.Collections;
using System.Collections.Specialized;
public class PropertyDictionary : DictionaryBase {
/// <summary>
/// Maintains a list of the property names that are readonly.
/// </summary>
StringCollection _readOnlyProperties = new StringCollection();
/// <summary>
/// Adds a property that cannot be changed.
/// </summary>
/// <remarks>
/// Properties added with this method can never be changed. Note that
/// they are removed if the <c>Clear</c> method is called.
/// </remarks>
/// <param name="name">Name of property</param>
/// <param name="value">Value of property</param>
public void AddReadOnly(string name, string value) {
if (!_readOnlyProperties.Contains(name)) {
_readOnlyProperties.Add(name);
Dictionary.Add(name, value);
}
}
/// <summary>
/// Adds a property to the collection.
/// </summary>
/// <param name="name">Name of property</param>
/// <param name="value">Value of property</param>
public void Add(string name, string value) {
if (!_readOnlyProperties.Contains(name)) {
Dictionary.Add(name, value);
}
}
public string this[string name] {
get { return (string) Dictionary[(object) name]; }
set {
if (!_readOnlyProperties.Contains(name)) {
Dictionary[name] = value;
}
}
}
protected override void OnClear() {
_readOnlyProperties.Clear();
}
}
}
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