Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Resources / ResourceSet.cs / 1 / ResourceSet.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: ResourceSet ** ** ** Purpose: Culture-specific collection of resources. ** ** ===========================================================*/ namespace System.Resources { using System; using System.Collections; using System.IO; using System.Runtime.Remoting.Activation; using System.Globalization; using System.Security.Permissions; using System.Runtime.InteropServices; using System.Reflection; using System.Runtime.Serialization; using System.Runtime.Versioning; // A ResourceSet stores all the resources defined in one particular CultureInfo. // // The method used to load resources is straightforward - this class // enumerates over an IResourceReader, loading every name and value, and // stores them in a hash table. Custom IResourceReaders can be used. // [Serializable()] [System.Runtime.InteropServices.ComVisible(true)] public class ResourceSet : IDisposable, IEnumerable { [NonSerialized] protected IResourceReader Reader; protected Hashtable Table; private Hashtable _caseInsensitiveTable; // For case-insensitive lookups. #if LOOSELY_LINKED_RESOURCE_REFERENCE [OptionalField] private Assembly _assembly; // For LooselyLinkedResourceReferences #endif // LOOSELY_LINKED_RESOURCE_REFERENCE protected ResourceSet() { // To not inconvenience people subclassing us, we should allocate a new // hashtable here just so that Table is set to something. Table = new Hashtable(0); } // For RuntimeResourceSet, ignore the Table parameter - it's a wasted // allocation. internal ResourceSet(bool junk) { } // Creates a ResourceSet using the system default ResourceReader // implementation. Use this constructor to open & read from a file // on disk. // [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public ResourceSet(String fileName) { Reader = new ResourceReader(fileName); Table = new Hashtable(); ReadResources(); } #if LOOSELY_LINKED_RESOURCE_REFERENCE public ResourceSet(String fileName, Assembly assembly) { Reader = new ResourceReader(fileName); Table = new Hashtable(); _assembly = assembly; ReadResources(); } #endif // LOOSELY_LINKED_RESOURCE_REFERENCE // Creates a ResourceSet using the system default ResourceReader // implementation. Use this constructor to read from an open stream // of data. // [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)] public ResourceSet(Stream stream) { Reader = new ResourceReader(stream); Table = new Hashtable(); ReadResources(); } #if LOOSELY_LINKED_RESOURCE_REFERENCE [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)] public ResourceSet(Stream stream, Assembly assembly) { Reader = new ResourceReader(stream); Table = new Hashtable(); _assembly = assembly; ReadResources(); } #endif // LOOSELY_LINKED_RESOURCE_REFERENCE public ResourceSet(IResourceReader reader) { if (reader == null) throw new ArgumentNullException("reader"); Reader = reader; Table = new Hashtable(); ReadResources(); } #if LOOSELY_LINKED_RESOURCE_REFERENCE public ResourceSet(IResourceReader reader, Assembly assembly) { if (reader == null) throw new ArgumentNullException("reader"); Reader = reader; Table = new Hashtable(); _assembly = assembly; ReadResources(); } #endif // LOOSELY_LINKED_RESOURCE_REFERENCE // Closes and releases any resources used by this ResourceSet, if any. // All calls to methods on the ResourceSet after a call to close may // fail. Close is guaranteed to be safely callable multiple times on a // particular ResourceSet, and all subclasses must support these semantics. public virtual void Close() { Dispose(true); } protected virtual void Dispose(bool disposing) { if (disposing) { // Close the Reader in a thread-safe way. IResourceReader copyOfReader = Reader; Reader = null; if (copyOfReader != null) copyOfReader.Close(); } Reader = null; _caseInsensitiveTable = null; Table = null; } public void Dispose() { Dispose(true); } #if LOOSELY_LINKED_RESOURCE_REFERENCE // Optional - used for resolving assembly manifest resource references. // This can safely be null. [ComVisible(false)] public Assembly Assembly { get { return _assembly; } /*protected*/ set { _assembly = value; } } #endif // LOOSELY_LINKED_RESOURCE_REFERENCE // Returns the preferred IResourceReader class for this kind of ResourceSet. // Subclasses of ResourceSet using their own Readers &; should override // GetDefaultReader and GetDefaultWriter. public virtual Type GetDefaultReader() { return typeof(ResourceReader); } // Returns the preferred IResourceWriter class for this kind of ResourceSet. // Subclasses of ResourceSet using their own Readers &; should override // GetDefaultReader and GetDefaultWriter. public virtual Type GetDefaultWriter() { return typeof(ResourceWriter); } [ComVisible(false)] public virtual IDictionaryEnumerator GetEnumerator() { return GetEnumeratorHelper(); } ///IEnumerator IEnumerable.GetEnumerator() { return GetEnumeratorHelper(); } private IDictionaryEnumerator GetEnumeratorHelper() { Hashtable copyOfTable = Table; // Avoid a race with Dispose if (copyOfTable == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_ResourceSet")); return copyOfTable.GetEnumerator(); } // Look up a string value for a resource given its name. // public virtual String GetString(String name) { Hashtable copyOfTable = Table; // Avoid a race with Dispose if (copyOfTable == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_ResourceSet")); if (name==null) throw new ArgumentNullException("name"); try { return (String) copyOfTable[name]; } catch (InvalidCastException) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_ResourceNotString_Name", name)); } } public virtual String GetString(String name, bool ignoreCase) { Hashtable copyOfTable = Table; // Avoid a race with Dispose if (copyOfTable == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_ResourceSet")); if (name==null) throw new ArgumentNullException("name"); String s; try { s = (String) copyOfTable[name]; } catch (InvalidCastException) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_ResourceNotString_Name", name)); } if (s != null || !ignoreCase) return s; // Try doing a case-insensitive lookup. Hashtable caseTable = _caseInsensitiveTable; // Avoid race with Close if (caseTable == null) { caseTable = new Hashtable(StringComparer.OrdinalIgnoreCase); #if _DEBUG //Console.WriteLine("ResourceSet::GetString loading up data. ignoreCase: "+ignoreCase); BCLDebug.Perf(!ignoreCase, "Using case-insensitive lookups is bad perf-wise. Consider capitalizing "+name+" correctly in your source"); #endif IDictionaryEnumerator en = copyOfTable.GetEnumerator(); while (en.MoveNext()) { caseTable.Add(en.Key, en.Value); } _caseInsensitiveTable = caseTable; } try { return (String) caseTable[name]; } catch (InvalidCastException) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_ResourceNotString_Name", name)); } } // Look up an object value for a resource given its name. // public virtual Object GetObject(String name) { Hashtable copyOfTable = Table; // Avoid a race with Dispose if (copyOfTable == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_ResourceSet")); if (name==null) throw new ArgumentNullException("name"); return copyOfTable[name]; } public virtual Object GetObject(String name, bool ignoreCase) { Hashtable copyOfTable = Table; // Avoid a race with Dispose if (copyOfTable == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_ResourceSet")); if (name==null) throw new ArgumentNullException("name"); Object obj = copyOfTable[name]; if (obj != null || !ignoreCase) return obj; // Try doing a case-insensitive lookup. Hashtable caseTable = _caseInsensitiveTable; // Avoid race with Close if (caseTable == null) { caseTable = new Hashtable(StringComparer.OrdinalIgnoreCase); #if _DEBUG //Console.WriteLine("ResourceSet::GetObject loading up case-insensitive data"); BCLDebug.Perf(!ignoreCase, "Using case-insensitive lookups is bad perf-wise. Consider capitalizing "+name+" correctly in your source"); #endif IDictionaryEnumerator en = copyOfTable.GetEnumerator(); while (en.MoveNext()) { caseTable.Add(en.Key, en.Value); } _caseInsensitiveTable = caseTable; } return caseTable[name]; } protected virtual void ReadResources() { IDictionaryEnumerator en = Reader.GetEnumerator(); while (en.MoveNext()) { Object value = en.Value; #if LOOSELY_LINKED_RESOURCE_REFERENCE if (Assembly != null && value is LooselyLinkedResourceReference) { /* SSS_WARNINGS_OFF */ LooselyLinkedResourceReference assRef = (LooselyLinkedResourceReference) value; value = assRef.Resolve(Assembly); /* SSS_WARNINGS_ON */ } #endif //LOOSELYLINKEDRESOURCEREFERENCE Table.Add(en.Key, value); } // While technically possible to close the Reader here, don't close it // to help with some WinRes lifetime issues. } } }
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