978 lines
22 KiB
C#
978 lines
22 KiB
C#
using System;
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using System.IO;
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using System.Xml;
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using System.Runtime.Serialization;
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//using System.Web.Configuration;
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using System.Collections;
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using System.Collections.Generic;
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using System.Reflection;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using static System.Net.WebRequestMethods;
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/*
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element and attribute names
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- Element names are case-sensitive
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- Element names must start with a letter or underscore
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- Element names cannot start with the letters xml(or XML, or Xml, etc)
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- Element names can contain letters, digits, hyphens, underscores, and periods
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- Element names cannot contain spaces
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* TODO
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* x) Add the ability for correctly named attributes to be able to fill in classes
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* x)
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*/
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namespace lib
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{
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public interface I_Serialize
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{
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void OnSerialize();
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void OnDeserialize( object enclosing );
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}
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[Flags]
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public enum Types
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{
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Fields = 0b_0001,
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Props = 0b_0010,
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Implied= 0b_0100,
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None = 0b_000,
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Default = Fields,
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All = Fields | Props,
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}
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public class Ser : Attribute
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{
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public Types Types { get; set; } = Types.Default;
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}
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public class WLChildAttributes : Attribute
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{
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public string[] Values { get; private set; }
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public WLChildAttributes( params string[] values )
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{
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this.Values = values;
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}
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}
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public class WLChildFieldsAttribute : WLChildAttributes
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{
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public WLChildFieldsAttribute( params string[] values ) : base( values ) { }
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}
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public class WLChildPropsAttribute : WLChildAttributes
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{
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public WLChildPropsAttribute( params string[] values ) : base( values ) { }
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}
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public enum Datastructure
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{
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Invalid,
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Tree,
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Graph,
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}
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public class XmlFormatter2Cfg: Config
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{
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public readonly Datastructure datastructure = Datastructure.Graph;
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public readonly int Version = 2;
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}
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public class XmlFormatter2: IFormatter
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{
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public StreamingContext Context { get; set; }
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static Random s_rnd = new Random();
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int m_rndVal = s_rnd.Next();
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XmlFormatter2Cfg m_cfg = new XmlFormatter2Cfg();
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#region Unimplimented
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public ISurrogateSelector SurrogateSelector
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{
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get { throw new NotImplementedException(); }
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set { throw new NotImplementedException(); }
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}
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public SerializationBinder Binder
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{
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get { throw new NotImplementedException(); }
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set { throw new NotImplementedException(); }
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}
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#endregion
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public XmlFormatter2()
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{
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Context = new StreamingContext( StreamingContextStates.All );
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}
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public XmlFormatter2( XmlFormatter2Cfg cfg )
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{
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Context = new StreamingContext( StreamingContextStates.All );
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m_cfg = cfg;
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log.warn( $"XML serialization is NOT fast" );
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}
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#region Deserialize
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private static FormatterConverter s_conv = new FormatterConverter();
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public object Deserialize( Stream stream )
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{
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return DeserializeKnownType( stream, null );
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}
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public T Deserialize<T>(Stream stream)
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{
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return (T)DeserializeKnownType(stream, typeof(T));
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}
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public object DeserializeKnownType( Stream stream, Type t )
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{
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XmlTextReader reader = new XmlTextReader(stream);
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object obj = Deserialize(reader, t);
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return obj;
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}
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private object Deserialize( XmlReader reader, Type t )
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{
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m_alreadySerialized.Clear();
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m_objectID = new ObjectIDGenerator();
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reader.Read();
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XmlDocument doc = new XmlDocument();
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doc.Load( reader );
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if( t == null )
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return Deserialize( doc.DocumentElement );
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return Deserialize( doc.DocumentElement, null, t, null );
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}
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public void DeserializeInto<T>(Stream stream, T obj)
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{
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XmlTextReader reader = new XmlTextReader( stream );
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reader.Read();
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XmlDocument doc = new XmlDocument();
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doc.Load( reader );
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HydrateObject<T>( doc.DocumentElement, null, obj );
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}
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private object Deserialize( XmlElement elem )
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{
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//lib.log.info( "object Deserialize( XmlElement elem ) {0} {1}", m_rndVal, m_alreadySerialized.Count );
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string typename = elem.HasAttribute("_.t") ? elem.GetAttribute("_.t") : elem.Name;
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return Deserialize( elem, null, typename );
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}
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private object Deserialize( XmlElement elem, MemberInfo mi, string typename )
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{
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AppDomain currentDomain = AppDomain.CurrentDomain;
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Assembly[] assems = currentDomain.GetAssemblies();
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Type type = null;
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// @@@@: This should go backwards, we tend to lookup our own stuff, then builtins.
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// Also, cache a typename into its assembly.
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foreach( Assembly a in assems )
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{
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type = a.GetType( typename );
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if( type != null )
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break;
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}
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if( type == null )
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{
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return null;
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}
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return Deserialize( elem, null, type, null );
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}
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private object Deserialize( XmlElement elem, MemberInfo mi, Type type, object existing /*, object enclosing = null*/ )
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{
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TypeCode typeCode = Type.GetTypeCode(type);
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if( typeCode != TypeCode.Object )
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{
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return DeserializeConcrete( elem, mi, type );
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}
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else
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{
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if( !type.IsArray )
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{
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object obj = DeserializeObject(elem, mi, type, existing);
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if( obj is I_Serialize )
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{
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var iser = obj as I_Serialize;
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iser.OnDeserialize( null );
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}
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return obj;
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}
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else
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{
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return DeserializeArray( elem, mi, type );
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}
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}
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}
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Type[] mm_types = new Type[1];
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private object GetDefault( Type t )
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{
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mm_types[0] = t;
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var fn = GetType().GetMethod("GetDefaultGeneric").MakeGenericMethod(mm_types);
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return fn.Invoke( this, null );
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}
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public T GetDefaultGeneric<T>()
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{
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return default( T );
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}
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private object DeserializeConcrete( XmlElement elem, MemberInfo mi, Type type )
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{
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string val = "";
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if( elem.HasAttribute("v") )
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{
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val = elem.GetAttribute("v");
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}
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else
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{
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val = elem.InnerText;
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}
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if ( !type.IsEnum )
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{
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try
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{
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return s_conv.Convert( val, type );
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}
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catch( Exception )
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{
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return GetDefault( type );
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}
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}
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else
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{
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return Enum.Parse( type, val );
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}
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}
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private XmlElement getNamedChild( XmlNodeList list, string name )
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{
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foreach( XmlNode node in list )
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{
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if( node.Name == name )
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{
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return (XmlElement)node;
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}
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}
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return null;
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}
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private Type FindType( string shortname )
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{
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Assembly[] ass = AppDomain.CurrentDomain.GetAssemblies();
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foreach( Assembly a in ass )
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{
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Type t = a.GetType(shortname);
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if( t != null )
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{
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return t;
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}
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}
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return null;
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}
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private Type[] mm_consType = new Type[2];
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private object[] mm_args = new object[2];
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private object DeserializeObject( XmlElement elem, MemberInfo mi, Type type, object existing )
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{
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Type finalType;
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var obj = GetObjectForDeser( elem, type, out finalType, existing );
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return HydrateObject( elem, mi, finalType, obj );
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}
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public object HydrateObject<T>( XmlElement elem, MemberInfo mi, T obj )
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{
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return HydrateObject( elem, mi, typeof( T ), obj );
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}
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private object HydrateObject( XmlElement elem, MemberInfo mi, Type finalType, object obj )
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{
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if( obj is IList )
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{
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var list = obj as IList;
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return DeserializeList( elem, mi, finalType, list );
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}
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Type typeISerializable = typeof( ISerializable );
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if( obj is ISerializable ) // type.IsSubclassOf( typeISerializable ) )
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{
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XmlNodeList allChildren = elem.ChildNodes;
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//ISerializable ser = obj as ISerializable;
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var serInfo = new SerializationInfo( finalType, new FormatterConverter() );
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//var serInfoForTypes = new SerializationInfo( type, new FormatterConverter() );
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//ser.GetObjectData( serInfoForTypes, Context );
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foreach( var objNode in allChildren )
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{
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var node = objNode as XmlElement;
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String name = node.Name;
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String childType = node.GetAttribute( "_.t" );
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name = refl.TypeToIdentifier( name );
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XmlElement childElem = getNamedChild( allChildren, name );
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var des = Deserialize( childElem, mi, childType );
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serInfo.AddValue( name, des, des.GetType() );
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}
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//ConstructorInfo[] allCons = obj.GetType().GetConstructors( BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic );
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//var serMem = FormatterServices.GetSerializableMembers( finalType );
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//object objUn = FormatterServices.GetSafeUninitializedObject( finalType );
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IDeserializationCallback objUnOnDeser = obj as IDeserializationCallback;
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mm_consType[0] = typeof( SerializationInfo );
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mm_consType[1] = typeof( StreamingContext );
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ConstructorInfo serCons = finalType.GetConstructor( BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, mm_consType, null );
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mm_args[0] = serInfo;
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mm_args[1] = Context;
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serCons.Invoke( obj, mm_args );
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if( objUnOnDeser != null )
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{
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objUnOnDeser.OnDeserialization( objUnOnDeser );
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}
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/*
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ser.GetObjectData( serInfo, Context );
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//var serEnum = ;
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foreach( var serMember in serInfo )
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{
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String name = serMember.Name;
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name = refl.TypeToIdentifier( name );
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XmlElement childElem = getNamedChild( allChildren, name );
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var des = Deserialize( childElem, name );
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}
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*/
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}
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else
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{
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XmlNodeList allChildren = elem.ChildNodes;
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bool filterFields, filterProps, doImpls, doFields, doProps;
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HashSet<string> whitelistFields, whitelistProps;
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GetFilters( mi, finalType, out filterFields, out filterProps, out doImpls, out doFields, out doProps, out whitelistFields, out whitelistProps );
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/*
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List<MemberInfo> members = new();
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if( doFields || doImpls )
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{
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members.AddRange( refl.GetAllFields( finalType ) );
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}
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if( doProps || doImpls )
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{
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members.AddRange( refl.GetAllProperties( finalType ) );
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}
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*/
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if( doFields || doImpls )
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{
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var fields = refl.GetAllFields( finalType );
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foreach( FieldInfo childFi in fields )
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{
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String name = childFi.Name;
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//This is to convert c# names that would be bad as XML tags
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name = refl.TypeToIdentifier( name );
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if( FilterField( filterFields, doImpls, whitelistFields, childFi as MemberInfo, name ) ) continue;
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XmlElement childElem = getNamedChild( allChildren, name );
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if( childElem != null )
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{
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object existingObj = childFi.GetValue( obj );
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object childObj = Deserialize( childElem, childFi, childFi.FieldType, existingObj );
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childFi.SetValue( obj, childObj );
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}
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}
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}
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if( doProps || doImpls )
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{
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var props = refl.GetAllProperties( finalType );
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foreach( var childPi in props )
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{
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String name = childPi.Name;
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name = refl.TypeToIdentifier( name );
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if( FilterField( filterFields, doImpls, whitelistFields, childPi as MemberInfo, name ) ) continue;
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XmlElement childElem = getNamedChild( allChildren, name );
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if( childElem != null )
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{
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object existingObj = childPi.GetValue( obj );
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object childObj = Deserialize( childElem, childPi, childPi.PropertyType, existingObj );
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childPi.SetValue( obj, childObj );
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}
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else
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{
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log.warn( $"" );
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}
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}
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}
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}
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return obj;
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}
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private static bool FilterField( bool filterFields, bool doImpls, HashSet<string> whitelistFields, MemberInfo mi, string name )
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{
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if( doImpls )
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{
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if( mi.GetCustomAttribute<WLChildAttributes>() == null ) return true;
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}
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if( filterFields && !whitelistFields.Contains( name ) ) return true;
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return false;
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}
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private object GetObjectForDeser( XmlElement elem, Type type, out Type finalType, object obj )
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{
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finalType = type;
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if( elem.HasAttribute( "_.t" ) )
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{
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var typename = elem.GetAttribute( "_.t" );
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finalType = FindType( typename );
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if( finalType == null )
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finalType = type;
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}
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string refString = elem.GetAttribute( "ref" );
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int refInt = refString.Length > 0 ? Convert.ToInt32( refString ) : -1;
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obj = createObject( finalType, refInt, obj );
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return obj;
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}
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private object DeserializeList( XmlElement elem, MemberInfo mi, Type type, IList list )
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{
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XmlNodeList arrNodeList = elem.ChildNodes;
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Type t = list.GetType();
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Type[] genT = t.GetGenericArguments();
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Debug.Assert( genT.Length == 1 );
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for( int i = 0; i < arrNodeList.Count; ++i )
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{
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if( arrNodeList.Item( i ) is XmlElement )
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{
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XmlElement arrElem = (XmlElement)arrNodeList.Item(i);
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list.Add( Deserialize( arrElem, mi, genT[0], null ) );
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}
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}
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return list;
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}
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private object DeserializeArray( XmlElement elem, MemberInfo mi, Type type )
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{
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Type typeElem = type.GetElementType();
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string refString = elem.GetAttribute("ref");
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int refInt = refString.Length > 0 ? Convert.ToInt32(refString) : -1;
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XmlNodeList arrNodeList = elem.ChildNodes;
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int length = arrNodeList.Count;
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Array arr = createArray(typeElem, refInt, length);
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for( int i = 0; i < arr.Length; ++i )
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{
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if( arrNodeList.Item( i ) is XmlElement )
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{
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XmlElement arrElem = (XmlElement)arrNodeList.Item(i);
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var finalType = typeElem;
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if (arrElem.HasAttribute("_.t"))
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{
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var typename = arrElem.GetAttribute("_.t");
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finalType = FindType(typename);
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if (finalType == null)
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finalType = typeElem;
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}
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arr.SetValue( Deserialize( arrElem, mi, finalType, null), i );
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}
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}
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return arr;
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}
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private object createObject( string typename, int refInt, object obj )
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{
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Type type = Type.GetType(typename);
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return createObject( type, refInt, obj );
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}
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private object createObject( Type type, int refInt, object existingObj )
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{
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TypeCode tc = Type.GetTypeCode(type);
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if( m_cfg.datastructure == Datastructure.Graph && refInt > 0 && m_alreadySerialized.ContainsKey( refInt ) )
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{
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//lib.log.info( "Reusing object for {0}", refInt );
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return m_alreadySerialized[refInt];
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}
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if( existingObj != null )
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{
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var existingObjType = existingObj.GetType();
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if( type == existingObjType ) return existingObj;
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}
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{
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object obj = null;
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try
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{
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//Trying the nice way to creat objects first.
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obj = Activator.CreateInstance( type );
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}
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|
catch( Exception )
|
|
{
|
|
try
|
|
{
|
|
obj = System.Runtime.Serialization.FormatterServices.GetUninitializedObject( type );
|
|
}
|
|
catch( Exception exInner )
|
|
{
|
|
log.error( $"Got exception {exInner.Message} trying to make an uninitialized object" );
|
|
}
|
|
|
|
}
|
|
|
|
if( obj == null )
|
|
{
|
|
log.warn( $"Could not create object of type {type.Name}" );
|
|
|
|
return obj;
|
|
}
|
|
|
|
if( m_cfg.datastructure == Datastructure.Graph && refInt > 0 )
|
|
{
|
|
m_alreadySerialized[refInt] = obj;
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
}
|
|
|
|
private Array createArray( string elemTypename, int refInt, int length )
|
|
{
|
|
Type elemType = Type.GetType(elemTypename);
|
|
|
|
return createArray( elemType, refInt, length );
|
|
}
|
|
|
|
private Array createArray( Type elemType, int refInt, int length )
|
|
{
|
|
TypeCode elemTC = Type.GetTypeCode(elemType);
|
|
|
|
if( m_cfg.datastructure == Datastructure.Graph && refInt > 0 && m_alreadySerialized.ContainsKey( refInt ) )
|
|
{
|
|
return (Array)m_alreadySerialized[refInt];
|
|
}
|
|
else
|
|
{
|
|
Array arr = Array.CreateInstance(elemType, length);
|
|
|
|
if( m_cfg.datastructure == Datastructure.Graph )
|
|
{
|
|
m_alreadySerialized[refInt] = arr;
|
|
|
|
}
|
|
|
|
return arr;
|
|
}
|
|
}
|
|
|
|
private ObjectIDGenerator m_objectID = new ObjectIDGenerator();
|
|
private Dictionary<long, object> m_alreadySerialized = new Dictionary<long, object>();
|
|
|
|
#endregion
|
|
|
|
#region Serialize
|
|
|
|
private string getTypeName( Type type )
|
|
{
|
|
//Assembly ass = type.Assembly;
|
|
|
|
//string assName = ass.GetName().Name;
|
|
|
|
return type.FullName; // + ", " + assName;
|
|
}
|
|
|
|
|
|
public void Serialize( Stream stream, object root )
|
|
{
|
|
Serialize( stream, null, root );
|
|
}
|
|
|
|
|
|
public void Serialize( Stream stream, MemberInfo mi, object root )
|
|
{
|
|
//lib.log.info( "Serialize( Stream stream, object root ) {0} {1}", m_rndVal, m_alreadySerialized.Count );
|
|
|
|
m_alreadySerialized.Clear();
|
|
m_objectID = new ObjectIDGenerator();
|
|
|
|
XmlTextWriter writer = new XmlTextWriter(stream, System.Text.Encoding.ASCII);
|
|
|
|
writer.Formatting = Formatting.Indented;
|
|
|
|
Serialize( writer, mi, root );
|
|
|
|
//Rely on the parent closing the stream.
|
|
//writer.Close();
|
|
writer.Flush();
|
|
|
|
//lib.log.info( "Serialize END ( Stream stream, object root ) {0} {1}", m_rndVal, m_alreadySerialized.Count );
|
|
}
|
|
|
|
private void Serialize( XmlWriter writer, MemberInfo mi, object root )
|
|
{
|
|
//writer.WriteStartDocument();
|
|
Serialize( writer, mi, root, "root", 1, true );
|
|
//writer.WriteEndDocument();
|
|
}
|
|
|
|
private void Serialize( XmlWriter writer, MemberInfo mi, object root, string name, int depth, bool forceType )
|
|
{
|
|
writer.WriteStartElement( name );
|
|
|
|
if( root != null )
|
|
{
|
|
Type type = root.GetType();
|
|
|
|
TypeCode typeCode = Type.GetTypeCode(type);
|
|
|
|
if( typeCode != TypeCode.Object )
|
|
{
|
|
SerializeConcrete( writer, mi, root, forceType );
|
|
}
|
|
else
|
|
{
|
|
if( !type.IsArray )
|
|
{
|
|
SerializeObject( writer, mi, root, depth );
|
|
}
|
|
else
|
|
{
|
|
SerializeArray( writer, mi, root, depth );
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
writer.WriteAttributeString( "v", "null" );
|
|
}
|
|
|
|
writer.WriteEndElement();
|
|
}
|
|
|
|
private void SerializeConcrete( XmlWriter writer, MemberInfo mi, object root, bool forceType )
|
|
{
|
|
//TODO: Only write this out if debugging.
|
|
if( forceType )
|
|
{
|
|
writer.WriteAttributeString( "_.t", getTypeName( root.GetType() ) );
|
|
}
|
|
writer.WriteAttributeString( "v", root.ToString() );
|
|
}
|
|
|
|
private void SerializeObject( XmlWriter writer, MemberInfo mi, object root, int depth )
|
|
{
|
|
writer.WriteAttributeString( "_.t", getTypeName( root.GetType() ) );
|
|
|
|
if(depth == 1)
|
|
{
|
|
writer.WriteAttributeString( "_.version.", $"{m_cfg.Version}" );
|
|
}
|
|
|
|
/*
|
|
if( root is IList )
|
|
{
|
|
var list = root as IList;
|
|
|
|
Type t = root.GetType();
|
|
|
|
Type[] genT = t.GetGenericArguments();
|
|
}
|
|
*/
|
|
|
|
bool first;
|
|
|
|
long refInt = m_objectID.GetId(root, out first);
|
|
|
|
if( m_cfg.datastructure == Datastructure.Graph )
|
|
{
|
|
writer.WriteAttributeString( "ref", refInt.ToString() );
|
|
|
|
}
|
|
|
|
if( first )
|
|
{
|
|
if( m_cfg.datastructure == Datastructure.Graph )
|
|
{
|
|
m_alreadySerialized[refInt] = root;
|
|
}
|
|
|
|
Type type = root.GetType();
|
|
|
|
//var whitelistProp = type.GetCustomAttribute<WhitelistPropsAttribute>();
|
|
|
|
//var useWhitelist = whitelistProp != null;
|
|
|
|
|
|
//*
|
|
Type typeISerializable = typeof(ISerializable);
|
|
|
|
if( root is ISerializable ) // type.IsSubclassOf( typeISerializable ) )
|
|
{
|
|
ISerializable ser = root as ISerializable;
|
|
|
|
var serInfo = new SerializationInfo(type, new FormatterConverter());
|
|
|
|
ser.GetObjectData( serInfo, Context );
|
|
|
|
//var serEnum = ;
|
|
|
|
foreach( var serMember in serInfo )
|
|
{
|
|
String name = serMember.Name;
|
|
|
|
name = refl.TypeToIdentifier( name );
|
|
|
|
Serialize( writer, mi, serMember.Value, name, depth, true );
|
|
}
|
|
|
|
//var sc = new SerializationContext(
|
|
|
|
//ser.GetObjectData(
|
|
}
|
|
else
|
|
//*/
|
|
{
|
|
bool filterFields, filterProps, doImpls, doFields, doProps;
|
|
HashSet<string> whitelistFields, whitelistProps;
|
|
GetFilters( mi, type, out filterFields, out filterProps, out doImpls, out doFields, out doProps, out whitelistFields, out whitelistProps );
|
|
|
|
if( doFields || doImpls )
|
|
{
|
|
var fields = refl.GetAllFields( type );
|
|
|
|
foreach( var childFi in fields )
|
|
{
|
|
String name = childFi.Name;
|
|
|
|
if( FilterField( filterFields, doImpls, whitelistFields, childFi as MemberInfo, name ) ) continue;
|
|
|
|
object[] objs = childFi.GetCustomAttributes( typeof( NonSerializedAttribute ), true );
|
|
|
|
if( objs.Length > 0 )
|
|
{
|
|
continue;
|
|
}
|
|
|
|
//if( childFi.GetCustomAttribute<WhitelistAttribute>() )
|
|
|
|
name = refl.TypeToIdentifier( name );
|
|
|
|
Serialize( writer, childFi, childFi.GetValue( root ), name, depth + 1, false );
|
|
}
|
|
}
|
|
|
|
if( doProps || doImpls )
|
|
{
|
|
var props = refl.GetAllProperties( type );
|
|
|
|
foreach( var childPi in props )
|
|
{
|
|
String name = childPi.Name;
|
|
|
|
if( FilterField( filterProps, doImpls, whitelistProps, childPi as MemberInfo, name ) ) continue;
|
|
|
|
object[] objs = childPi.GetCustomAttributes( typeof( NonSerializedAttribute ), true );
|
|
|
|
if( objs.Length > 0 )
|
|
{
|
|
continue;
|
|
}
|
|
|
|
name = refl.TypeToIdentifier( name );
|
|
|
|
Serialize( writer, childPi, childPi.GetValue( root ), name, depth + 1, false );
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
private static void GetFilters( MemberInfo mi, Type type, out bool filterFields, out bool filterProps, out bool doImpls, out bool doFields, out bool doProps, out HashSet<string> whitelistFields, out HashSet<string> whitelistProps )
|
|
{
|
|
var custWLFields = mi?.GetCustomAttribute<WLChildFieldsAttribute>();
|
|
var custWLProps = mi?.GetCustomAttribute<WLChildPropsAttribute>();
|
|
|
|
filterFields = custWLFields != null;
|
|
filterProps = custWLProps != null;
|
|
|
|
var typesTodo = type.GetCustomAttribute<Ser>()?.Types ?? Types.None;
|
|
|
|
doImpls = typesTodo.HasFlag( Types.Implied );
|
|
doFields = filterFields || typesTodo.HasFlag( Types.Fields );
|
|
doProps = filterProps || typesTodo.HasFlag( Types.Props );
|
|
whitelistFields = new( custWLFields?.Values ?? new string[0] );
|
|
whitelistProps = new( custWLProps?.Values ?? new string[0] );
|
|
}
|
|
|
|
private void SerializeArray( XmlWriter writer, MemberInfo mi, object root, int depth )
|
|
{
|
|
Array arr = (Array)root;
|
|
|
|
Type typeElem = arr.GetType().GetElementType();
|
|
|
|
Type type = root.GetType();
|
|
|
|
writer.WriteAttributeString( "_.t", getTypeName( type ) );
|
|
|
|
bool first;
|
|
|
|
long refInt = m_objectID.GetId(root, out first);
|
|
|
|
if( m_cfg.datastructure == Datastructure.Graph )
|
|
{
|
|
writer.WriteAttributeString( "ref", refInt.ToString() );
|
|
}
|
|
|
|
if( first )
|
|
{
|
|
if( m_cfg.datastructure == Datastructure.Graph )
|
|
{
|
|
m_alreadySerialized[refInt] = root;
|
|
}
|
|
|
|
|
|
for( int i = 0; i < arr.Length; ++i )
|
|
{
|
|
Serialize( writer, mi, arr.GetValue( i ), "i" + i.ToString(), depth + 1, false );
|
|
}
|
|
}
|
|
}
|
|
#endregion
|
|
}
|
|
|
|
}
|