Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Runtime / Serialization / Formatter.cs / 1 / Formatter.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: Formatter ** ** ** Purpose: The abstract base class for all COM+ Runtime ** Serialization Formatters. ** ** ===========================================================*/ namespace System.Runtime.Serialization { using System.Threading; using System.Runtime.Remoting; using System; using System.Collections; using System.Reflection; using System.IO; using System.Globalization; // This abstract class provides some helper methods for implementing // IFormatter. It will manage queueing objects for serialization // (the functionality formerly provided by the IGraphWalker interface) // and generating ids on a per-object basis. [Serializable,CLSCompliant(false)] [System.Runtime.InteropServices.ComVisible(true)] public abstract class Formatter : IFormatter { protected ObjectIDGenerator m_idGenerator; protected Queue m_objectQueue; // The default constructor instantiates the queue for objects // to be serialized and creates a new instance of the // ObjectIDGenerator. protected Formatter() { m_objectQueue = new Queue(); m_idGenerator = new ObjectIDGenerator(); } public abstract Object Deserialize(Stream serializationStream); // This gives back the next object to be serialized. Objects // are returned in a FIFO order based on how they were passed // to Schedule. The id of the object is put into the objID parameter // and the Object itself is returned from the function. protected virtual Object GetNext(out long objID) { bool isNew; if (m_objectQueue.Count==0) { objID=0; return null; } Object obj = m_objectQueue.Dequeue(); objID = m_idGenerator.HasId(obj, out isNew); if (isNew) { throw new SerializationException(Environment.GetResourceString("Serialization_NoID")); } return obj; } // Schedules an object for later serialization if it hasn't already been scheduled. // We get an ID for obj and put it on the queue for later serialization // if this is a new object id. protected virtual long Schedule(Object obj) { bool isNew; long id; if (obj==null) { return 0; } id = m_idGenerator.GetId(obj, out isNew); if (isNew) { m_objectQueue.Enqueue(obj); } return id; } public abstract void Serialize(Stream serializationStream, Object graph); // Writes an array to the stream protected abstract void WriteArray(Object obj, String name, Type memberType); // Writes a boolean to the stream. protected abstract void WriteBoolean(bool val, String name); // Writes a byte to the stream. protected abstract void WriteByte(byte val, String name); // Writes a character to the stream. protected abstract void WriteChar(char val, String name); // Writes an instance of DateTime to the stream. protected abstract void WriteDateTime(DateTime val, String name); // Writes an instance of Decimal to the stream. protected abstract void WriteDecimal(Decimal val, String name); // Writes an instance of Double to the stream. protected abstract void WriteDouble(double val, String name); // Writes an instance of Int16 to the stream. protected abstract void WriteInt16(short val, String name); // Writes an instance of Int32 to the stream. protected abstract void WriteInt32(int val, String name); // Writes an instance of Int64 to the stream. protected abstract void WriteInt64(long val, String name); // Writes an object reference to the stream. Schedules the object with the graph walker // to handle the work. protected abstract void WriteObjectRef(Object obj, String name, Type memberType); // Switches on the type of the member to determine which of the Write* methods // to call in order to write this particular member to the stream. protected virtual void WriteMember(String memberName, Object data) { BCLDebug.Trace("SER", "[Formatter.WriteMember]data: ", data); if (data==null) { WriteObjectRef(data, memberName, typeof(Object)); return; } Type varType = data.GetType(); BCLDebug.Trace("SER", "[Formatter.WriteMember]data is of type: " , varType); if (varType==typeof(Boolean)) { WriteBoolean(Convert.ToBoolean(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(Char)) { WriteChar(Convert.ToChar(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(SByte)) { WriteSByte(Convert.ToSByte(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(Byte)) { WriteByte(Convert.ToByte(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(Int16)) { WriteInt16(Convert.ToInt16(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(Int32)) { WriteInt32(Convert.ToInt32(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(Int64)) { WriteInt64(Convert.ToInt64(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(Single)) { WriteSingle(Convert.ToSingle(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(Double)) { WriteDouble(Convert.ToDouble(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(DateTime)) { WriteDateTime(Convert.ToDateTime(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(Decimal)) { WriteDecimal(Convert.ToDecimal(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(UInt16)) { WriteUInt16(Convert.ToUInt16(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(UInt32)) { WriteUInt32(Convert.ToUInt32(data, CultureInfo.InvariantCulture), memberName); } else if (varType==typeof(UInt64)) { WriteUInt64(Convert.ToUInt64(data, CultureInfo.InvariantCulture), memberName); } else { if (varType.IsArray) { WriteArray(data, memberName, varType); } else if (varType.IsValueType) { WriteValueType(data, memberName, varType); } else { WriteObjectRef(data, memberName, varType); } } } // Writes an instance of SByte to the stream. [CLSCompliant(false)] protected abstract void WriteSByte(sbyte val, String name); // Writes an instance of Single to the stream. protected abstract void WriteSingle(float val, String name); // Writes an instance of TimeSpan to the stream. protected abstract void WriteTimeSpan(TimeSpan val, String name); // Writes an instance of an ushort to the stream. [CLSCompliant(false)] protected abstract void WriteUInt16(ushort val, String name); // Writes an instance of an uint to the stream. [CLSCompliant(false)] protected abstract void WriteUInt32(uint val, String name); // Writes an instance of a ulong to the stream. [CLSCompliant(false)] protected abstract void WriteUInt64(ulong val, String name); // Writes a valuetype out to the stream. protected abstract void WriteValueType(Object obj, String name, Type memberType); public abstract ISurrogateSelector SurrogateSelector { get; set; } public abstract SerializationBinder Binder { get; set; } public abstract StreamingContext Context { get; set; } } }
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