XmlNamedNodeMap.cs source code in C# .NET

                        Code:
                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / Dom / XmlNamedNodeMap.cs / 1 / XmlNamedNodeMap.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
namespace System.Xml { 
    using System.Collections;
 
    // Represents a collection of nodes that can be accessed by name or index.
    public class XmlNamedNodeMap : IEnumerable {
        internal XmlNode parent;
        internal ArrayList nodes; 

        internal XmlNamedNodeMap( XmlNode parent ) { 
            this.parent = parent; 
            this.nodes = null;
        } 

        // Retrieves a XmlNode specified by name.
        public virtual XmlNode GetNamedItem(String name) {
            int offset = FindNodeOffset(name); 
            if (offset >= 0)
                return(XmlNode) Nodes[offset]; 
            return null; 
        }
 
        // Adds a XmlNode using its Name property
        public virtual XmlNode SetNamedItem(XmlNode node) {
            if ( node == null )
                return null; 

            int offset = FindNodeOffset( node.LocalName, node.NamespaceURI ); 
            if (offset == -1) { 
                AddNode( node );
                return null; 
            }
            else {
                return ReplaceNodeAt( offset, node );
            } 
        }
 
        // Removes the node specified by name. 
        public virtual XmlNode RemoveNamedItem(String name) {
            int offset = FindNodeOffset(name); 
            if (offset >= 0) {
                return RemoveNodeAt( offset );
            }
            return null; 
        }
 
        // Gets the number of nodes in this XmlNamedNodeMap. 
        public virtual int Count {
            get { 
                if (nodes != null)
                    return nodes.Count;
                return 0;
            } 
        }
 
        // Retrieves the node at the specified index in this XmlNamedNodeMap. 
        public virtual XmlNode Item(int index) {
            if (index < 0 || index >= Nodes.Count) 
                return null;
            try {
                return(XmlNode) Nodes[index];
            } catch ( ArgumentOutOfRangeException ) { 
                throw new IndexOutOfRangeException(Res.GetString(Res.Xdom_IndexOutOfRange));
            } 
        } 

        // 
        // DOM Level 2
        //

        // Retrieves a node specified by LocalName and NamespaceURI. 
        public virtual XmlNode GetNamedItem(String localName, String namespaceURI) {
            int offset = FindNodeOffset( localName, namespaceURI ); 
            if (offset >= 0) 
                return(XmlNode) Nodes[offset];
            return null; 
        }

        // Removes a node specified by local name and namespace URI.
        public virtual XmlNode RemoveNamedItem(String localName, String namespaceURI) { 
            int offset = FindNodeOffset( localName, namespaceURI );
            if (offset >= 0) { 
                return RemoveNodeAt( offset ); 
            }
            return null; 
        }

        internal ArrayList Nodes {
            get { 
                if (nodes == null)
                    nodes = new ArrayList(); 
 
                return nodes;
            } 
        }

        public virtual IEnumerator GetEnumerator() {
            if ( nodes == null ) { 
                return XmlDocument.EmptyEnumerator;
            } 
            else { 
                return Nodes.GetEnumerator();
            } 
        }

        internal int FindNodeOffset( string name ) {
            int c = this.Count; 
            for (int i = 0; i < c; i++) {
                XmlNode node = (XmlNode) Nodes[i]; 
 
                if (name == node.Name)
                    return i; 
            }

            return -1;
        } 

        internal int FindNodeOffset( string localName, string namespaceURI ) { 
            int c = this.Count; 
            for (int i = 0; i < c; i++) {
                XmlNode node = (XmlNode) Nodes[i]; 

                if (node.LocalName == localName && node.NamespaceURI == namespaceURI)
                    return i;
            } 

            return -1; 
        } 

        internal virtual XmlNode AddNode( XmlNode node ) { 
            XmlNode oldParent;
            if ( node.NodeType == XmlNodeType.Attribute )
                oldParent = ((XmlAttribute)node).OwnerElement;
            else 
                oldParent = node.ParentNode;
            string nodeValue = node.Value; 
            XmlNodeChangedEventArgs args = parent.GetEventArgs( node, oldParent, parent, nodeValue, nodeValue, XmlNodeChangedAction.Insert ); 

            if (args != null) 
                parent.BeforeEvent( args );

            Nodes.Add( node );
            node.SetParent( parent ); 

            if (args != null) 
                parent.AfterEvent( args ); 

            return node; 
        }

        internal virtual XmlNode AddNodeForLoad(XmlNode node, XmlDocument doc) {
            XmlNodeChangedEventArgs args = doc.GetInsertEventArgsForLoad(node, parent); 
            if (args != null) {
                doc.BeforeEvent(args); 
            } 
            Nodes.Add(node);
            node.SetParent(parent); 
            if (args != null) {
                doc.AfterEvent(args);
            }
            return node; 
        }
 
        internal virtual XmlNode RemoveNodeAt( int i ) { 
            XmlNode oldNode = (XmlNode)Nodes[i];
 
            string oldNodeValue = oldNode.Value;
            XmlNodeChangedEventArgs args = parent.GetEventArgs( oldNode, parent, null, oldNodeValue, oldNodeValue, XmlNodeChangedAction.Remove );

            if (args != null) 
                parent.BeforeEvent( args );
 
            Nodes.RemoveAt(i); 
            oldNode.SetParent( null );
 
            if (args != null)
                parent.AfterEvent( args );

            return oldNode; 
        }
 
        internal XmlNode ReplaceNodeAt( int i, XmlNode node ) { 
            XmlNode oldNode = RemoveNodeAt( i );
            InsertNodeAt( i, node ); 
            return oldNode;
        }

        internal virtual XmlNode InsertNodeAt( int i, XmlNode node ) { 
            XmlNode oldParent;
            if ( node.NodeType == XmlNodeType.Attribute ) 
                oldParent = ((XmlAttribute)node).OwnerElement; 
            else
                oldParent = node.ParentNode; 

            string nodeValue = node.Value;
            XmlNodeChangedEventArgs args = parent.GetEventArgs( node, oldParent, parent, nodeValue, nodeValue, XmlNodeChangedAction.Insert );
 
            if (args != null)
                parent.BeforeEvent( args ); 
 
            Nodes.Insert( i, node );
            node.SetParent( parent ); 

            if (args != null)
                parent.AfterEvent( args );
 
            return node;
        } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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XmlNamedNodeMap.cs source code in C# .NET

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