Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System/sys/system/configuration/SettingsBase.cs

@@ -0,0 +1,178 @@
+//------------------------------------------------------------------------------
+// <copyright file="SettingsBase.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Configuration {
+    using  System.Collections.Specialized;
+    using  System.Runtime.Serialization;
+    using  System.Configuration.Provider;
+    using  System.Collections;
+    using System.ComponentModel;
+   ////////////////////////////////////////////////////////////
+   ////////////////////////////////////////////////////////////
+   ////////////////////////////////////////////////////////////
+
+   public abstract class SettingsBase {
+
+       protected SettingsBase()
+       {
+           _PropertyValues = new SettingsPropertyValueCollection();
+       }
+       ////////////////////////////////////////////////////////////
+       ////////////////////////////////////////////////////////////
+       public virtual object this[string propertyName]
+       {
+           get {
+               if (IsSynchronized) {
+                   lock (this) {
+                       return GetPropertyValueByName(propertyName);
+                   }
+               } else {
+                   return GetPropertyValueByName(propertyName);
+               }
+           }
+           set {
+               if (IsSynchronized) {
+                   lock (this) {
+                       SetPropertyValueByName(propertyName, value);
+                   }
+               } else {
+                   SetPropertyValueByName(propertyName, value);
+               }
+           }
+       }
+
+       private object GetPropertyValueByName(string propertyName)
+       {
+           if (Properties == null || _PropertyValues == null || Properties.Count == 0)
+               throw new SettingsPropertyNotFoundException(SR.GetString(SR.SettingsPropertyNotFound, propertyName));
+           SettingsProperty pp = Properties[propertyName];
+           if (pp == null)
+               throw new SettingsPropertyNotFoundException(SR.GetString(SR.SettingsPropertyNotFound, propertyName));
+           SettingsPropertyValue p = _PropertyValues[propertyName];
+           if (p == null)
+           {
+               GetPropertiesFromProvider(pp.Provider);
+               p = _PropertyValues[propertyName];
+               if (p == null)
+                   throw new SettingsPropertyNotFoundException(SR.GetString(SR.SettingsPropertyNotFound, propertyName));
+           }
+           return p.PropertyValue;
+       }
+       private void SetPropertyValueByName(string propertyName, object propertyValue)
+       {
+           if (Properties == null || _PropertyValues == null || Properties.Count == 0)
+               throw new SettingsPropertyNotFoundException(SR.GetString(SR.SettingsPropertyNotFound, propertyName));
+
+           SettingsProperty pp = Properties[propertyName];
+           if (pp == null)
+               throw new SettingsPropertyNotFoundException(SR.GetString(SR.SettingsPropertyNotFound, propertyName));
+
+           if (pp.IsReadOnly)
+               throw new SettingsPropertyIsReadOnlyException(SR.GetString(SR.SettingsPropertyReadOnly, propertyName));
+
+           if (propertyValue != null && !pp.PropertyType.IsInstanceOfType(propertyValue))
+               throw new SettingsPropertyWrongTypeException(SR.GetString(SR.SettingsPropertyWrongType, propertyName));
+
+           SettingsPropertyValue p = _PropertyValues[propertyName];
+           if (p == null)
+           {
+               GetPropertiesFromProvider(pp.Provider);
+               p = _PropertyValues[propertyName];
+               if (p == null)
+                   throw new SettingsPropertyNotFoundException(SR.GetString(SR.SettingsPropertyNotFound, propertyName));
+           }
+
+           p.PropertyValue = propertyValue;
+       }
+
+       ////////////////////////////////////////////////////////////
+       ////////////////////////////////////////////////////////////
+       public void Initialize(
+               SettingsContext                  context,
+               SettingsPropertyCollection       properties,
+               SettingsProviderCollection       providers)
+       {
+           _Context = context;
+           _Properties = properties;
+           _Providers = providers;
+       }
+
+       ////////////////////////////////////////////////////////////
+       ////////////////////////////////////////////////////////////
+       public virtual void Save() {
+           if (IsSynchronized) {
+               lock (this) {
+                   SaveCore();
+               }
+           } else {
+               SaveCore();
+           }
+       }
+       private void SaveCore()
+       {
+           if (Properties == null || _PropertyValues == null || Properties.Count == 0)
+               return;
+
+           foreach(SettingsProvider prov in Providers) {
+               SettingsPropertyValueCollection ppcv = new SettingsPropertyValueCollection();
+               foreach (SettingsPropertyValue pp in PropertyValues)
+               {
+                   if (pp.Property.Provider == prov) {
+                       ppcv.Add(pp);
+                   }
+               }
+               if (ppcv.Count > 0) {
+                   prov.SetPropertyValues(Context, ppcv);
+               }
+           }
+           foreach (SettingsPropertyValue pp in PropertyValues)
+               pp.IsDirty = false;
+       }
+       virtual public SettingsPropertyCollection Properties  { get { return _Properties; }}
+       virtual public SettingsProviderCollection Providers   { get { return _Providers; }}
+       virtual public SettingsPropertyValueCollection PropertyValues { get { return _PropertyValues; } }
+       virtual public SettingsContext Context { get { return _Context; } }
+
+
+       private void GetPropertiesFromProvider(SettingsProvider provider)
+       {
+           SettingsPropertyCollection ppc = new SettingsPropertyCollection();
+           foreach (SettingsProperty pp in Properties)
+           {
+               if (pp.Provider == provider)
+               {
+                   ppc.Add(pp);
+               }
+           }
+
+           if (ppc.Count > 0)
+           {
+               SettingsPropertyValueCollection ppcv = provider.GetPropertyValues(Context, ppc);
+               foreach (SettingsPropertyValue p in ppcv)
+               {
+                   if (_PropertyValues[p.Name] == null)
+                       _PropertyValues.Add(p);
+               }
+           }
+       }
+
+       public static SettingsBase Synchronized(SettingsBase settingsBase)
+       {
+           settingsBase._IsSynchronized = true;
+           return settingsBase;
+       }
+       ////////////////////////////////////////////////////////////
+       ////////////////////////////////////////////////////////////
+       private  SettingsPropertyCollection      _Properties       = null;
+       private  SettingsProviderCollection      _Providers        = null;
+       private  SettingsPropertyValueCollection _PropertyValues   = null;
+       private  SettingsContext                 _Context          = null;
+       private  bool                            _IsSynchronized   = false;
+
+       [Browsable(false)]
+       public bool IsSynchronized { get { return _IsSynchronized; } }
+   }
+}