Imported Upstream version 4.2.0.179

Former-commit-id: 4610231f55806d2a05ed69e5ff3faa7336cc1479

external/referencesource/System.Configuration/System/Configuration/elementinformation.cs

@@ -0,0 +1,187 @@
+//------------------------------------------------------------------------------
+// <copyright file="ElementInformation.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Configuration;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using System.Collections;
+using System.Runtime.Serialization;
+
+namespace System.Configuration  
+{
+
+    // ElementInformation
+    //
+    // Expose information on Configuration Elements, and the 
+    // properties that they contain
+    //
+    public sealed class ElementInformation
+    {
+        private ConfigurationElement           _thisElement;
+        private PropertyInformationCollection  _internalProperties;
+        private ConfigurationException[]       _errors;
+
+        internal ElementInformation(ConfigurationElement thisElement) {
+            _thisElement = thisElement;
+        }
+
+        // Properties
+        //
+        // Retrieve Collection of properties within this element
+        //
+        public PropertyInformationCollection Properties 
+        { 
+            get {
+                if (_internalProperties == null) {
+                    _internalProperties = new PropertyInformationCollection(_thisElement);
+                }
+
+                return _internalProperties;
+            }
+        }
+
+        // IsInherited
+        //
+        // Was this element inheritted, or was the property actually
+        // set here
+        //
+        public bool IsPresent {
+            get {
+                return _thisElement.ElementPresent;
+            }
+        }
+
+        // IsLocked
+        //
+        // Is this property locked?
+        //
+        public bool IsLocked {
+            get {
+                return (((_thisElement.ItemLocked & ConfigurationValueFlags.Locked) != 0) &&
+                        ((_thisElement.ItemLocked & ConfigurationValueFlags.Inherited) != 0));
+            }
+        }
+
+        // IsCollection
+        //
+        // Is this element a collection?
+        //
+        public bool IsCollection {
+            get {
+                ConfigurationElementCollection collection = _thisElement as ConfigurationElementCollection;
+                if (collection == null) { // Try the default collection
+                    if (_thisElement.Properties.DefaultCollectionProperty != null) { // this is not a collection but it may contain a default collection
+                        collection = _thisElement[_thisElement.Properties.DefaultCollectionProperty] as ConfigurationElementCollection;
+                    }
+                }
+
+                return (collection != null);
+            }
+        }
+
+        // Internal method to fix SetRawXML defect...
+        internal PropertySourceInfo PropertyInfoInternal() {
+            return _thisElement.PropertyInfoInternal(_thisElement.ElementTagName);
+        }
+
+        internal void ChangeSourceAndLineNumber(PropertySourceInfo sourceInformation) {
+            _thisElement.Values.ChangeSourceInfo(_thisElement.ElementTagName, sourceInformation);
+        }
+
+        // Source
+        //
+        // What is the source file where this data came from
+        //
+        public string Source {
+            get {
+                PropertySourceInfo psi = _thisElement.Values.GetSourceInfo(_thisElement.ElementTagName);
+
+                if (psi == null) {
+                    return null;
+                }
+                
+                return psi.FileName;
+            }
+        }
+        
+        // LineNumber
+        //
+        // What is the line number associated with the source
+        //
+        // Note:
+        //   1 is the first line in the file.  0 is returned when there is no 
+        //   source
+        //
+        public int LineNumber {
+            get {
+                PropertySourceInfo psi = _thisElement.Values.GetSourceInfo(_thisElement.ElementTagName);
+                if (psi == null) {
+                    return 0;
+                }
+
+                return psi.LineNumber;
+            }
+        }
+
+        // Type
+        //
+        // What is the type for the element
+        //
+        public Type Type {
+            get {
+                return _thisElement.GetType();
+            }
+        }
+        
+        // Validator
+        //
+        // What is the validator to validate the element?
+        //
+        public ConfigurationValidatorBase Validator {
+            get {
+                return _thisElement.ElementProperty.Validator;
+            }
+        }
+
+        // GetReadOnlyErrorsList
+        //
+        // Get a Read Only list of the exceptions for this 
+        // element
+        //
+        private ConfigurationException[] GetReadOnlyErrorsList() {
+            ArrayList                arrayList;
+            int                      count;
+            ConfigurationException[] exceptionList;
+            
+            arrayList = _thisElement.GetErrorsList();
+            count     = arrayList.Count;
+
+            // Create readonly array
+            exceptionList = new ConfigurationException[arrayList.Count];
+
+            if (count != 0) {
+                arrayList.CopyTo(exceptionList, 0);
+            }
+
+            return exceptionList;
+        }
+        
+        // Errors
+        //
+        // Retrieve the _errors for this element and sub elements
+        //
+        public ICollection Errors {
+            get {
+                if (_errors == null) {
+                    _errors = GetReadOnlyErrorsList();
+                }
+
+                return _errors;
+            }
+        }
+    }
+}