Logo Search packages:      
Sourcecode: f-spot version File versions

BinaryXmlWriter.cs

//
// BinaryXmlWriter.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;
using System.Text;
using System.IO;

namespace Mono.Addins.Serialization
{
      internal class BinaryXmlWriter
      {
            BinaryWriter writer;
            BinaryXmlTypeMap typeMap;
            Hashtable stringTable = new Hashtable ();
            
            public BinaryXmlWriter (Stream stream, BinaryXmlTypeMap typeMap)
            {
                  this.typeMap = typeMap;
                  writer = new BinaryWriter (stream);
            }
            
            public void WriteBeginElement (string name)
            {
                  writer.Write (BinaryXmlReader.TagBeginElement);
                  WriteString (name);
            }
            
            public void WriteEndElement ()
            {
                  writer.Write (BinaryXmlReader.TagEndElement);
            }
            
            void WriteValueHeader (string name, TypeCode type)
            {
                  writer.Write (BinaryXmlReader.TagValue);
                  WriteString (name);
                  writer.Write ((byte) type);
            }
            
            public void WriteValue (string name, bool b)
            {
                  WriteValueHeader (name, TypeCode.Boolean);
                  writer.Write (b);
            }
            
            public void WriteValue (string name, string s)
            {
                  WriteValueHeader (name, TypeCode.String);
                  WriteString (s);
            }
            
            public void WriteValue (string name, char value)
            {
                  WriteValueHeader (name, TypeCode.Char);
                  writer.Write (value);
            }
            
            public void WriteValue (string name, byte value)
            {
                  WriteValueHeader (name, TypeCode.Byte);
                  writer.Write (value);
            }
            
            public void WriteValue (string name, short value)
            {
                  WriteValueHeader (name, TypeCode.Int16);
                  writer.Write (value);
            }
            
            public void WriteValue (string name, int value)
            {
                  WriteValueHeader (name, TypeCode.Int32);
                  writer.Write (value);
            }
            
            public void WriteValue (string name, long value)
            {
                  WriteValueHeader (name, TypeCode.Int64);
                  writer.Write (value);
            }
            
            public void WriteValue (string name, DateTime value)
            {
                  WriteValueHeader (name, TypeCode.DateTime);
                  writer.Write (value.Ticks);
            }
            
            public void WriteValue (string name, object ob)
            {
                  TypeCode t = ob != null ? Type.GetTypeCode (ob.GetType ()) : TypeCode.Empty;
                  WriteValueHeader (name, t);
                  if (t != TypeCode.Empty)
                        WriteValue (ob, t);
            }
            
            public void WriteValue (string name, IBinaryXmlElement ob)
            {
                  if (ob == null)
                        WriteValueHeader (name, TypeCode.Empty);
                  else {
                        WriteValueHeader (name, TypeCode.Object);
                        WriteObject (ob);
                  }
            }
            
            void WriteValue (object ob)
            {
                  if (ob == null)
                        writer.Write ((byte) TypeCode.Empty);
                  else {
                        TypeCode t = Type.GetTypeCode (ob.GetType ());
                        writer.Write ((byte) t);
                        WriteValue (ob, t);
                  }
            }
            
            void WriteValue (object ob, TypeCode t)
            {
                  switch (t) {
                        case TypeCode.Boolean: writer.Write ((bool)ob); break;
                        case TypeCode.Char: writer.Write ((char)ob); break;
                        case TypeCode.SByte: writer.Write ((sbyte)ob); break;
                        case TypeCode.Byte: writer.Write ((byte)ob); break;
                        case TypeCode.Int16: writer.Write ((short)ob); break;
                        case TypeCode.UInt16: writer.Write ((ushort)ob); break;
                        case TypeCode.Int32: writer.Write ((int)ob); break;
                        case TypeCode.UInt32: writer.Write ((uint)ob); break;
                        case TypeCode.Int64: writer.Write ((long)ob); break;
                        case TypeCode.UInt64: writer.Write ((ulong)ob); break;
                        case TypeCode.Single: writer.Write ((float)ob); break;
                        case TypeCode.Double: writer.Write ((double)ob); break;
                        case TypeCode.DateTime: writer.Write (((DateTime)ob).Ticks); break;
                        case TypeCode.String: WriteString ((string)ob); break;
                        case TypeCode.Object: WriteObject (ob); break;
                        default:
                              throw new InvalidOperationException ("Unexpected value type: " + t);
                  }
            }
            
            void WriteObject (object ob)
            {
                  if (ob == null)
                        writer.Write (BinaryXmlReader.TagObjectNull);
                  else {
                        IBinaryXmlElement elem = ob as IBinaryXmlElement;
                        if (elem != null) {
                              writer.Write (BinaryXmlReader.TagObject);
                              WriteString (typeMap.GetTypeName (elem));
                              elem.Write (this);
                              WriteEndElement ();
                        }
                        else if (ob is IDictionary) {
                              IDictionary dict = (IDictionary) ob;
                              writer.Write (BinaryXmlReader.TagObjectDictionary);
                              writer.Write (dict.Count);
                              foreach (DictionaryEntry e in dict) {
                                    WriteValue (e.Key);
                                    WriteValue (e.Value);
                              }
                        }
                        else if (ob is ICollection) {
                              ICollection col = (ICollection) ob;
                              writer.Write (BinaryXmlReader.TagObjectArray);
                              if (ob is Array)
                                    writer.Write ((byte) Type.GetTypeCode (ob.GetType().GetElementType ()));
                              else
                                    writer.Write ((byte) TypeCode.Object);
                              writer.Write (col.Count);
                              foreach (object e in col) {
                                    WriteValue (e);
                              }
                        }
                        else
                              throw new InvalidOperationException ("Invalid object type: " + ob.GetType ());
                  }
            }
            
            void WriteString (string s)
            {
                  if (s == null)
                        writer.Write (-1);
                  else {
                        object ind = stringTable [s];
                        if (ind == null) {
                              stringTable.Add (s, stringTable.Count);
                              byte[] bytes = Encoding.UTF8.GetBytes (s);
                              writer.Write (bytes.Length);
                              writer.Write (bytes);
                        } else {
                              // +2 because -1 is reserved for null, and 0 is considered positive
                              writer.Write (-((int)ind + 2));
                        }
                  }
            }
      }
}

Generated by  Doxygen 1.6.0   Back to index