context: //
  // XmlTypeMapMember.cs: 
  //
  // Author:
  //   Lluis Sanchez Gual (lluis@ximian.com)
  //
  // (C) 2002, 2003 Ximian, Inc.  http://www.ximian.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.Reflection;
  
  namespace System.Xml.Serialization
  {
  	// XmlTypeMapMember
  	// A member of a class that must be serialized
  
  	internal class XmlTypeMapMember
  	{
  		string _name;
  		int _index;
  		int _globalIndex = -1;
  		int _specifiedGlobalIndex = -1;
  		TypeData _typeData;
  		MemberInfo _member;
  		MemberInfo _specifiedMember;
  		MethodInfo _shouldSerialize;
  		object _defaultValue = System.DBNull.Value;
  		string documentation;
  		int _flags;
  		
  		const int OPTIONAL = 1;
  		const int RETURN_VALUE = 2;
  		const int IGNORE = 4;
  
  		public XmlTypeMapMember()
  		{
  		}
  
  		public string Name
  		{
  			get { return _name; }
  			set { _name = value; }
  		}
  		
  		public object DefaultValue
  		{
  			get { return _defaultValue; }
  			set { _defaultValue = value; }
  		}
  
  		public string Documentation
  		{
  			set { documentation = value; }
  			get { return documentation; }
  		}
  
  		public bool IsReadOnly (Type type)
  		{
  			if (_member == null) InitMember (type);
  			return (_member is PropertyInfo) && !((PropertyInfo)_member).CanWrite;
  		}
  
  		public static object GetValue (object ob, string name)
  		{
  			MemberInfo[] mems = ob.GetType().GetMember (name, BindingFlags.Instance|BindingFlags.Public);
  			if (mems[0] is PropertyInfo) return ((PropertyInfo)mems[0]).GetValue (ob, null);
  			else return ((FieldInfo)mems[0]).GetValue (ob);
  		}
  
  		public object GetValue (object ob)
  		{
  			if (_member == null) InitMember (ob.GetType());
  			if (_member is PropertyInfo) return ((PropertyInfo)_member).GetValue (ob, null);
  			else return ((FieldInfo)_member).GetValue (ob);
  		}
  
  		public void SetValue (object ob, object value)
  		{
  			if (_member == null) InitMember (ob.GetType());
  			_typeData.ConvertForAssignment (ref value);
  			if (_member is PropertyInfo) ((PropertyInfo)_member).SetValue (ob, value, null);
  			else ((FieldInfo)_member).SetValue (ob, value);
  		}
  
  		public static void SetValue (object ob, string name, object value)
  		{
  			MemberInfo[] mems = ob.GetType().GetMember (name, BindingFlags.Instance|BindingFlags.Public);
  			if (mems[0] is PropertyInfo) ((PropertyInfo)mems[0]).SetValue (ob, value, null);
  			else ((FieldInfo)mems[0]).SetValue (ob, value);
  		}
  
  		void InitMember (Type type)
  		{
  			MemberInfo[] mems = type.GetMember (_name, BindingFlags.Instance|BindingFlags.Public);
  			_member = mems[0];
  			
  			mems = type.GetMember (_name + "Specified", BindingFlags.Instance|BindingFlags.Public);
  			if (mems.Length > 0) _specifiedMember = mems[0];
  			if (_specifiedMember is PropertyInfo && !((PropertyInfo) _specifiedMember).CanRead)
  				_specifiedMember = null;
  
  			var method = type.GetMethod ("ShouldSerialize" + _name, BindingFlags.Instance | BindingFlags.Public, null, Type.EmptyTypes, null);
  			if (method != null && method.ReturnType == typeof (bool) && !method.IsGenericMethod)
  				_shouldSerialize = method;
  		}
  
  		public TypeData TypeData
  		{
  			get { return _typeData; }
  			set { _typeData = value; }
  		}
  
  		public int Index
  		{
  			get { return _index; }
  			set { _index = value; }
  		}
  		
  		public int GlobalIndex
  		{
  			get { return _globalIndex; }
  			set { _globalIndex = value; }
  		}
  		
  		public int SpecifiedGlobalIndex
  		{
  			get { return _specifiedGlobalIndex; }
  		}
  		
  		public bool IsOptionalValueType
  		{
  			get { return (_flags & OPTIONAL) != 0; }
  			set { _flags = value ? (_flags | OPTIONAL) : (_flags & ~OPTIONAL); }
  		}
  		
  		public bool IsReturnValue
  		{
  			get { return (_flags & RETURN_VALUE) != 0; }
  			set { _flags = value ? (_flags | RETURN_VALUE) : (_flags & ~RETURN_VALUE); }
  		}
  		
  		public bool Ignore
  		{
  			get { return (_flags & IGNORE) != 0; }
  			set { _flags = value ? (_flags | IGNORE) : (_flags & ~IGNORE); }
  		}
  		
  		public void CheckOptionalValueType (Type type)
  		{
  			// Used when reflecting a type
  			if (_member == null) InitMember (type);
  			IsOptionalValueType = (_specifiedMember != null || _shouldSerialize != null);
  		}
  		
  		public void CheckOptionalValueType (XmlReflectionMember[] members)
  		{
  			// Used when reflecting a list of members (e.g. web service parameters)
  			for (int n=0; n<members.Length; n++) {
  				XmlReflectionMember m = members [n];
  				if (m.MemberName == Name + "Specified" && m.MemberType == typeof(bool) && m.XmlAttributes.XmlIgnore) {
  					IsOptionalValueType = true;
  					_specifiedGlobalIndex = n;
  					break;
  				}
  			}
  		}
  
  		public bool HasSpecified {
  			get { return _specifiedMember != null; }
  		}
  
  		public bool HasShouldSerialize {
  			get { return _shouldSerialize != null; }
  		}
  
  		public bool GetValueSpecified (object ob)
  		{
  			if (_specifiedGlobalIndex != -1) {
  				object[] array = (object[])ob;
  				return _specifiedGlobalIndex < array.Length && (bool) array [_specifiedGlobalIndex];
  			}
  			bool specified = true;
  
  			if (_specifiedMember != null) {
  				if (_specifiedMember is PropertyInfo)
  					specified = (bool)((PropertyInfo)_specifiedMember).GetValue (ob, null);
  				else
  
gt: 					specified = (bool)((FieldInfo)_specifiedMember).GetValue (ob);