StaticSiteMapProvider.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / StaticSiteMapProvider.cs / 1 / StaticSiteMapProvider.cs

                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

/* 
 * SimpleSiteMapProvider class definition 
 *
 * Copyright (c) 2002 Microsoft Corporation 
 */

namespace System.Web {
 
    using System;
    using System.Collections; 
    using System.Collections.Specialized; 
    using System.Globalization;
    using System.Security.Permissions; 
    using System.Web.UI;
    using System.Web.Util;

 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    public abstract class StaticSiteMapProvider : SiteMapProvider { 

        // Table maps nodes to their child node collections 
        private Hashtable _childNodeCollectionTable;
        internal IDictionary ChildNodeCollectionTable {
            get {
                if (_childNodeCollectionTable == null) { 
                    lock (_lock) {
                        if (_childNodeCollectionTable == null) { 
                            _childNodeCollectionTable = new Hashtable(); 
                        }
                    } 
                }

                return _childNodeCollectionTable;
            } 
        }
 
        // Case sensitive table that maps key to sitemap node. 
        private Hashtable _keyTable;
        internal IDictionary KeyTable { 
            get {
                if (_keyTable == null) {
                    lock (_lock) {
                        if (_keyTable == null) { 
                            _keyTable = new Hashtable();
                        } 
                    } 
                }
 
                return _keyTable;
            }
        }
 
        // Table maps nodes to their parent nodes
        private Hashtable _parentNodeTable; 
        internal IDictionary ParentNodeTable { 
            get {
                if (_parentNodeTable == null) { 
                    lock (_lock) {
                        if (_parentNodeTable == null) {
                            _parentNodeTable = new Hashtable();
                        } 
                    }
                } 
 
                return _parentNodeTable;
            } 
        }

        // Case insensitive table that maps url to sitemap node.
        private Hashtable _urlTable; 
        internal IDictionary UrlTable {
            get { 
                if (_urlTable == null) { 
                    lock (_lock) {
                        if (_urlTable == null) { 
                            _urlTable = new Hashtable(StringComparer.OrdinalIgnoreCase);
                        }
                    }
                } 

                return _urlTable; 
            } 
        }
 

        /// 
        ///    Add single node to provider tree and sets the parent-child relation.
        ///  
        protected internal override void AddNode(SiteMapNode node, SiteMapNode parentNode) {
            if (node == null) { 
                throw new ArgumentNullException("node"); 
            }
 
            lock (_lock) {
                bool validUrl = false;

                string url = node.Url; 
                if (!String.IsNullOrEmpty(url)) {
                    if (HttpRuntime.AppDomainAppVirtualPath != null) { 
 
                        if (!UrlPath.IsAbsolutePhysicalPath(url)) {
                            url = UrlPath.Combine(HttpRuntime.AppDomainAppVirtualPathString, url); 

                            // Normalize url
                            url = UrlPath.MakeVirtualPathAppAbsolute(url);
                        } 

                        if (UrlTable[url] != null) 
                            throw new InvalidOperationException( 
                                SR.GetString(SR.XmlSiteMapProvider_Multiple_Nodes_With_Identical_Url, url));
                    } 

                    validUrl = true;
                }
 
                String key = node.Key;
                Debug.Assert(key != null); 
                if (KeyTable.Contains(key)) { 
                    throw new InvalidOperationException(
                    SR.GetString(SR.XmlSiteMapProvider_Multiple_Nodes_With_Identical_Key, key)); 
                }

                KeyTable[key] = node;
 
                if (validUrl) {
                    UrlTable[url] = node; 
                } 

                if (parentNode != null) { 
                    ParentNodeTable[node] = parentNode;
                    if (ChildNodeCollectionTable[parentNode] == null)
                        ChildNodeCollectionTable[parentNode] = new SiteMapNodeCollection();
 
                    ((SiteMapNodeCollection)ChildNodeCollectionTable[parentNode]).Add(node);
                } 
            } 
        }
 

        public abstract SiteMapNode BuildSiteMap();

        // Clear tables 

        protected virtual void Clear() { 
            lock (_lock) { 
                if (_childNodeCollectionTable != null)
                    _childNodeCollectionTable.Clear(); 

                if (_urlTable != null)
                    _urlTable.Clear();
 
                if (_parentNodeTable != null)
                    _parentNodeTable.Clear(); 
 
                if (_keyTable != null)
                    _keyTable.Clear(); 
            }
        }

        // Find sitemapnode in current provider 

        public override SiteMapNode FindSiteMapNodeFromKey(string key) { 
            SiteMapNode result = base.FindSiteMapNodeFromKey(key); 

            if (result == null) { 
                result = (SiteMapNode)KeyTable[key];
            }

            return ReturnNodeIfAccessible(result); 
        }
 
        // Find sitemapnode in current provider 

        public override SiteMapNode FindSiteMapNode(string rawUrl) { 
            if (rawUrl == null)
                throw new ArgumentNullException("rawUrl");

            // VSWhidbey 411041. URL needs to be trimmed. 
            rawUrl = rawUrl.Trim();
 
            if (rawUrl.Length == 0) { 
                return null;
            } 

            // Make sure it is an app absolute url
            if (UrlPath.IsAppRelativePath(rawUrl)) {
                rawUrl = UrlPath.MakeVirtualPathAppAbsolute(rawUrl); 
            }
 
            BuildSiteMap(); 

            return ReturnNodeIfAccessible((SiteMapNode)UrlTable[rawUrl]); 
        }

        // Return readonly child node collection
 
        public override SiteMapNodeCollection GetChildNodes(SiteMapNode node) {
            if (node == null) 
                throw new ArgumentNullException("node"); 

            BuildSiteMap(); 
            SiteMapNodeCollection collection = (SiteMapNodeCollection)ChildNodeCollectionTable[node];

            if (collection == null) {
                SiteMapNode childNodeFromKey = (SiteMapNode)KeyTable[node.Key]; 
                if (childNodeFromKey != null) {
                    collection = (SiteMapNodeCollection)ChildNodeCollectionTable[childNodeFromKey]; 
                } 
            }
 
            if (collection != null) {
                if (!SecurityTrimmingEnabled) {
                    return SiteMapNodeCollection.ReadOnly(collection);
                } 

                HttpContext context = HttpContext.Current; 
                SiteMapNodeCollection trimmedCollection = new SiteMapNodeCollection(collection.Count); 
                foreach (SiteMapNode subNode in collection) {
                    if (subNode.IsAccessibleToUser(context)) { 
                        trimmedCollection.Add(subNode);
                    }
                }
 
                return SiteMapNodeCollection.ReadOnly(trimmedCollection);
            } 
 
            return SiteMapNodeCollection.Empty;
        } 


        public override SiteMapNode GetParentNode(SiteMapNode node) {
            if (node == null) 
                throw new ArgumentNullException("node");
 
            BuildSiteMap(); 
            SiteMapNode parent = (SiteMapNode)ParentNodeTable[node];
 
            if (parent == null) {
                // Try to find the original node in the table using the key
                SiteMapNode fallbackNode = (SiteMapNode)KeyTable[node.Key];
                if (fallbackNode != null) { 
                    parent = (SiteMapNode)ParentNodeTable[fallbackNode];
                } 
            } 

            // Try the parent providers. 
            if (parent == null && ParentProvider != null) {
                parent = ParentProvider.GetParentNode(node);
            }
 
            return ReturnNodeIfAccessible(parent);
        } 
 

        protected internal override void RemoveNode(SiteMapNode node) { 
            if (node == null)
                throw new ArgumentNullException("node");

            lock (_lock) { 
                SiteMapNode oldParent = (SiteMapNode)ParentNodeTable[node];
                if (ParentNodeTable.Contains(node)) 
                    ParentNodeTable.Remove(node); 

                if (oldParent != null) { 
                    SiteMapNodeCollection collection = (SiteMapNodeCollection)ChildNodeCollectionTable[oldParent];
                    if (collection != null && collection.Contains(node))
                        collection.Remove(node);
                } 

                string url = node.Url; 
                if (url != null && url.Length > 0 && UrlTable.Contains(url)) { 
                    UrlTable.Remove(url);
                } 

                string key = node.Key;
                if (KeyTable.Contains(key)) {
                    KeyTable.Remove(key); 
                }
            } 
        } 
    }
}
                        

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