1 // NAnt - A .NET build tool
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2 // Copyright (C) 2001 Gerry Shaw
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4 // This program is free software; you can redistribute it and/or modify
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5 // it under the terms of the GNU General Public License as published by
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6 // the Free Software Foundation; either version 2 of the License, or
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7 // (at your option) any later version.
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9 // This program is distributed in the hope that it will be useful,
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10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 // GNU General Public License for more details.
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14 // You should have received a copy of the GNU General Public License
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15 // along with this program; if not, write to the Free Software
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16 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18 // Gerry Shaw (gerry_shaw@yahoo.com)
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20 namespace SourceForge.NAnt {
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22 using System.Collections;
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23 using System.Collections.Specialized;
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25 public class PropertyDictionary : DictionaryBase {
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28 /// Maintains a list of the property names that are readonly.
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30 StringCollection _readOnlyProperties = new StringCollection();
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33 /// Adds a property that cannot be changed.
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36 /// Properties added with this method can never be changed. Note that
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37 /// they are removed if the <c>Clear</c> method is called.
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39 /// <param name="name">Name of property</param>
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40 /// <param name="value">Value of property</param>
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41 public void AddReadOnly(string name, string value) {
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42 if (!_readOnlyProperties.Contains(name)) {
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43 _readOnlyProperties.Add(name);
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44 Dictionary.Add(name, value);
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49 /// Adds a property to the collection.
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51 /// <param name="name">Name of property</param>
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52 /// <param name="value">Value of property</param>
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53 public void Add(string name, string value) {
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54 if (!_readOnlyProperties.Contains(name)) {
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55 Dictionary.Add(name, value);
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59 public string this[string name] {
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60 get { return (string) Dictionary[(object) name]; }
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62 if (!_readOnlyProperties.Contains(name)) {
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63 Dictionary[name] = value;
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68 protected override void OnClear() {
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69 _readOnlyProperties.Clear();
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