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ObjectDescription.cs

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

namespace Mono.Addins.Description
{
      public class ObjectDescription: IBinaryXmlElement
      {
            internal XmlElement Element;
            object parent;
            
            internal ObjectDescription (XmlElement elem)
            {
                  Element = elem;
            }
            
            internal ObjectDescription ()
            {
            }
            
            public object Parent {
                  get { return parent; }
            }
            
            public AddinDescription ParentAddinDescription {
                  get {
                        if (parent is AddinDescription)
                              return (AddinDescription) parent;
                        else if (parent is ObjectDescription)
                              return ((ObjectDescription)parent).ParentAddinDescription;
                        else
                              return null;
                  }
            }
            
            internal void SetParent (object ob)
            {
                  parent = ob;
            }
            
            void IBinaryXmlElement.Write (BinaryXmlWriter writer)
            {
                  Write (writer);
            }
            
            void IBinaryXmlElement.Read (BinaryXmlReader reader)
            {
                  Read (reader);
            }
            
            internal virtual void Write (BinaryXmlWriter writer)
            {
            }
            
            internal virtual void Read (BinaryXmlReader reader)
            {
            }
            
            internal virtual void SaveXml (XmlElement parent)
            {
            }
            
            internal void CreateElement (XmlElement parent, string nodeName)
            {
                  if (Element == null) {
                        Element = parent.OwnerDocument.CreateElement (nodeName); 
                        parent.AppendChild (Element);
                  }
            }
            
            internal string ReadXmlDescription ()
            {
                  XmlElement de = Element ["Description"];
                  if (de != null)
                        return de.InnerText;
                  else
                        return null;
            }
            
            internal void SaveXmlDescription (string desc)
            {
                  XmlElement de = Element ["Description"];
                  if (desc != null && desc.Length > 0) {
                        if (de == null) {
                              de = Element.OwnerDocument.CreateElement ("Description");
                              Element.AppendChild (de);
                        }
                        de.InnerText = desc;
                  } else {
                        if (de != null)
                              Element.RemoveChild (de);
                  }
            }
            
            internal virtual void Verify (string location, StringCollection errors)
            {
            }
            
            internal void VerifyNotEmpty (string location, StringCollection errors, string attr, string val)
            {
                  if (val == null || val.Length == 0)
                        errors.Add (location + ": attribute '" + attr + "' can't be empty.");
            }
      }
}

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