StaticSiteMapProvider.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / StaticSiteMapProvider.cs / 1305376 / 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;

    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);
                }
            }
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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StaticSiteMapProvider.cs source code in C# .NET

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