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ExtensionNodeType.cs

//
// ExtensionNodeType.cs
//
// Author:
//   Lluis Sanchez Gual
//
// Copyright (C) 2007 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//


using System;
using System.Xml;
using System.Collections;
using System.Collections.Specialized;
using Mono.Addins.Serialization;

namespace Mono.Addins.Description
{
      public class ExtensionNodeType: ExtensionNodeSet
      {
            string typeName;
            string objectTypeName;
            string description;
            string addinId;
            NodeTypeAttributeCollection attributes;
            
            // Cached clr type
            [NonSerialized]
            internal Type Type;
            
            // Cached serializable fields
            [NonSerialized]
            internal Hashtable Fields;
            internal string[] RequiredFields;
            
            // Addin where this extension type is implemented
            internal string AddinId {
                  get { return addinId; }
                  set { addinId = value; }
            }
            
            // Type of the extension node
            public string TypeName {
                  get { return typeName != null ? typeName : string.Empty; }
                  set { typeName = value; }
            }
            
            public string NodeName {
                  get { return Id; }
                  set { Id = value; }
            }
            
            // Type of the object that the extension creates (only valid for TypeNodeExtension).
            public string ObjectTypeName {
                  get { return objectTypeName != null ? objectTypeName : string.Empty; }
                  set { objectTypeName = value; }
            }
            
            // The description
            public string Description {
                  get { return description != null ? description : string.Empty; }
                  set { description = value; }
            }
            
            public NodeTypeAttributeCollection Attributes {
                  get {
                        if (attributes == null) {
                              attributes = new NodeTypeAttributeCollection (this);
                              if (Element != null) {
                                    XmlElement atts = Element ["Attributes"];
                                    if (atts != null) {
                                          foreach (XmlNode node in atts.ChildNodes) {
                                                XmlElement e = node as XmlElement;
                                                if (e != null)
                                                      attributes.Add (new NodeTypeAttribute (e));
                                          }
                                    }
                              }
                        }
                        return attributes;
                  }
            }

            internal ExtensionNodeType (XmlElement element): base (element)
            {
                  XmlAttribute at = element.Attributes ["type"];
                  if (at != null)
                        typeName = at.Value;
                  at = element.Attributes ["objectType"];
                  if (at != null)
                        objectTypeName = at.Value;
                  XmlElement de = element ["Description"];
                  if (de != null)
                        description = de.InnerText;
            }
            
            internal ExtensionNodeType ()
            {
            }
                  
            internal override string IdAttribute {
                  get { return "name"; }
            }
            
            internal override void Verify (string location, StringCollection errors)
            {
                  base.Verify (location, errors);
            }
            
            internal override void SaveXml (XmlElement parent, string nodeName)
            {
                  base.SaveXml (parent, "ExtensionNode");
                  
                  XmlElement atts = Element ["Attributes"];
                  if (Attributes.Count > 0) {
                        if (atts == null) {
                              atts = parent.OwnerDocument.CreateElement ("Attributes");
                              Element.AppendChild (atts);
                        }
                        Attributes.SaveXml (atts);
                  } else {
                        if (atts != null)
                              Element.RemoveChild (atts);
                  }
                  
                  if (TypeName.Length > 0)
                        Element.SetAttribute ("type", TypeName);
                  else
                        Element.RemoveAttribute ("type");
                  
                  if (ObjectTypeName.Length > 0)
                        Element.SetAttribute ("objectType", ObjectTypeName);
                  else
                        Element.RemoveAttribute ("objectType");

                  SaveXmlDescription (Description);
            }
            
            internal override void Write (BinaryXmlWriter writer)
            {
                  base.Write (writer);
                  if (Id.Length == 0)
                        Id = "Type";
                  if (TypeName.Length == 0)
                        typeName = "Mono.Addins.TypeExtensionNode";
                  writer.WriteValue ("typeName", typeName);
                  writer.WriteValue ("objectTypeName", objectTypeName);
                  writer.WriteValue ("description", description);
                  writer.WriteValue ("addinId", addinId);
                  writer.WriteValue ("Attributes", attributes);
            }
            
            internal override void Read (BinaryXmlReader reader)
            {
                  base.Read (reader);
                  typeName = reader.ReadStringValue ("typeName");
                  objectTypeName = reader.ReadStringValue ("objectTypeName");
                  if (!reader.IgnoreDescriptionData)
                        description = reader.ReadStringValue ("description");
                  addinId = reader.ReadStringValue ("addinId");
                  if (!reader.IgnoreDescriptionData)
                        attributes = (NodeTypeAttributeCollection) reader.ReadValue ("Attributes", new NodeTypeAttributeCollection (this));
            }
      }
}

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