Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Configuration/BuildProvider.cs

@@ -0,0 +1,132 @@
+//------------------------------------------------------------------------------
+// <copyright file="BuildProvider.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.Configuration {
+    using System;
+    using System.Xml;
+    using System.Configuration;
+    using System.Collections.Specialized;
+    using System.Collections;
+    using System.Globalization;
+    using System.IO;
+    using System.Text;
+    using System.Web.Compilation;
+    using System.Reflection;
+    using System.Web.Hosting;
+    using System.Web.UI;
+    using System.CodeDom.Compiler;
+    using System.Web.Util;
+    using System.ComponentModel;
+    using System.Security.Permissions;
+
+    public sealed class BuildProvider : ConfigurationElement {
+        private static ConfigurationPropertyCollection _properties;
+        private static readonly ConfigurationProperty _propExtension =
+            new ConfigurationProperty("extension",
+                                        typeof(string),
+                                        null,
+                                        null,
+                                        StdValidatorsAndConverters.NonEmptyStringValidator,
+                                        ConfigurationPropertyOptions.IsRequired | ConfigurationPropertyOptions.IsKey);
+        private static readonly ConfigurationProperty _propType =
+            new ConfigurationProperty("type",
+                                        typeof(string),
+                                        null,
+                                        null,
+                                        StdValidatorsAndConverters.NonEmptyStringValidator,
+                                        ConfigurationPropertyOptions.IsRequired | ConfigurationPropertyOptions.IsTypeStringTransformationRequired);
+
+        private readonly BuildProviderInfo _info;
+
+        static BuildProvider() {
+            _properties = new ConfigurationPropertyCollection();
+            _properties.Add(_propExtension);
+            _properties.Add(_propType);
+        }
+
+        public BuildProvider(String extension, String type)
+            : this() {
+            Extension = extension;
+            Type = type;
+        }
+        internal BuildProvider() {
+            _info = new ConfigurationBuildProviderInfo(this);
+        }
+
+        protected override ConfigurationPropertyCollection Properties {
+            get {
+                return _properties;
+            }
+        }
+
+        // this override is required because AppliesTo may be in any order in the
+        // property string but it still and the default equals operator would consider
+        // them different depending on order in the persisted string.
+        public override bool Equals(object provider) {
+            BuildProvider o = provider as BuildProvider;
+            return (o != null && StringUtil.EqualsIgnoreCase(Extension, o.Extension) && Type == o.Type);
+        }
+        public override int GetHashCode() {
+            return HashCodeCombiner.CombineHashCodes(StringUtil.GetNonRandomizedHashCode(Extension.ToLower(CultureInfo.InvariantCulture)),
+                                                     Type.GetHashCode());
+        }
+
+
+        [ConfigurationProperty("extension", IsRequired = true, IsKey = true, DefaultValue = "")]
+        [StringValidator(MinLength = 1)]
+        public string Extension {
+            get {
+                return (string)base[_propExtension];
+            }
+            set {
+                base[_propExtension] = value;
+            }
+        }
+
+        [ConfigurationProperty("type", IsRequired = true, DefaultValue = "")]
+        [StringValidator(MinLength = 1)]
+        public string Type {
+            get {
+                return (string)base[_propType];
+            }
+            set {
+                base[_propType] = value;
+            }
+        }
+
+        internal BuildProviderInfo BuildProviderInfo {
+            get {
+                Debug.Assert(_info != null);
+                return _info;
+            }
+        }
+
+        private class ConfigurationBuildProviderInfo : BuildProviderInfo {
+            private readonly BuildProvider _buildProvider;
+            object _lock = new object();
+            private Type _type;
+
+            public ConfigurationBuildProviderInfo(BuildProvider buildProvider) {
+                Debug.Assert(buildProvider != null);
+                _buildProvider = buildProvider;
+            }
+
+            internal override Type Type {
+                get {
+                    if (_type == null) {
+                        lock (_lock) {
+                            if (_type == null) {
+                                _type = CompilationUtil.LoadTypeWithChecks(_buildProvider.Type, typeof(System.Web.Compilation.BuildProvider), null, _buildProvider, "type");
+                            }
+                        }
+                    }
+
+                    return _type;
+                }
+            }
+        }
+    }
+}