/// <summary>
/// Adds the members from the mapping. This will recursively
/// traverse the mapping tree and add all members for
/// reference maps.
/// </summary>
/// <param name="members">The members to be added to.</param>
/// <param name="mapping">The mapping where the members are added from.</param>
protected virtual void AddMembers(MemberMapCollection members, ClassMap mapping)
{
members.AddRange(mapping.MemberMaps);
foreach (var refMap in mapping.ReferenceMaps)
{
AddMembers(members, refMap.Data.Mapping);
}
}
/// <summary>
/// Writes the header record from the given members.
/// </summary>
/// <param name="type">The type of the record.</param>
public virtual void WriteHeader(Type type)
{
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
if (!context.WriterConfiguration.HasHeaderRecord)
{
throw new WriterException(context, "Configuration.HasHeaderRecord is false. This will need to be enabled to write the header.");
}
if (context.HasHeaderBeenWritten)
{
throw new WriterException(context, "The header record has already been written. You can't write it more than once.");
}
if (context.HasRecordBeenWritten)
{
throw new WriterException(context, "Records have already been written. You can't write the header after writing records has started.");
}
if (type == typeof(object))
{
return;
}
if (context.WriterConfiguration.Maps[type] == null)
{
context.WriterConfiguration.Maps.Add(context.WriterConfiguration.AutoMap(type));
}
var members = new MemberMapCollection();
AddMembers(members, context.WriterConfiguration.Maps[type]);
foreach (var member in members)
{
if (CanWrite(member))
{
if (member.Data.IndexEnd >= member.Data.Index)
{
var count = member.Data.IndexEnd - member.Data.Index + 1;
for (var i = 1; i <= count; i++)
{
WriteField(member.Data.Names.FirstOrDefault() + i);
}
}
else
{
WriteField(member.Data.Names.FirstOrDefault());
}
}
}
context.HasHeaderBeenWritten = true;
}
/// <inheritdoc/>
public virtual void WriteHeader(Type type)
{
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
if (type == typeof(object))
{
return;
}
if (context.Maps[type] == null)
{
context.Maps.Add(context.AutoMap(type));
}
var members = new MemberMapCollection();
members.AddMembers(context.Maps[type]);
var headerRecord = new List <string>();
foreach (var member in members)
{
if (CanWrite(member))
{
if (member.Data.IndexEnd >= member.Data.Index)
{
var count = member.Data.IndexEnd - member.Data.Index + 1;
for (var i = 1; i <= count; i++)
{
var header = member.Data.Names.FirstOrDefault() + i;
WriteField(header);
headerRecord.Add(header);
}
}
else
{
var header = member.Data.Names.FirstOrDefault();
WriteField(header);
headerRecord.Add(header);
}
}
}
HeaderRecord = headerRecord.ToArray();
hasHeaderBeenWritten = true;
}
/// <summary>
/// Creates the action for an object.
/// </summary>
/// <param name="type">The type of object to create the action for.</param>
protected virtual Action <T> CreateActionForObject <T>(Type type)
{
var recordParameter = Expression.Parameter(typeof(T), "record");
var recordParameterConverted = Expression.Convert(recordParameter, type);
// Get a list of all the members so they will
// be sorted properly.
var members = new MemberMapCollection();
AddMembers(members, context.WriterConfiguration.Maps[type]);
if (members.Count == 0)
{
throw new WriterException(context, $"No properties are mapped for type '{type.FullName}'.");
}
var delegates = new List <Action <T> >();
foreach (var memberMap in members)
{
if (memberMap.Data.WritingConvertExpression != null)
{
// The user is providing the expression to do the conversion.
Expression exp = Expression.Invoke(memberMap.Data.WritingConvertExpression, recordParameterConverted);
exp = Expression.Call(Expression.Constant(this), nameof(WriteConvertedField), null, exp);
delegates.Add(Expression.Lambda <Action <T> >(exp, recordParameter).Compile());
continue;
}
if (!CanWrite(memberMap))
{
continue;
}
Expression fieldExpression;
if (memberMap.Data.IsConstantSet)
{
if (memberMap.Data.Constant == null)
{
fieldExpression = Expression.Constant(string.Empty);
}
else
{
fieldExpression = Expression.Constant(memberMap.Data.Constant);
var typeConverterExpression = Expression.Constant(Configuration.TypeConverterFactory.GetConverter(memberMap.Data.Constant.GetType()));
var method = typeof(ITypeConverter).GetMethod(nameof(ITypeConverter.ConvertToString));
fieldExpression = Expression.Convert(fieldExpression, typeof(object));
fieldExpression = Expression.Call(typeConverterExpression, method, fieldExpression, Expression.Constant(this), Expression.Constant(memberMap.Data));
}
}
else
{
if (memberMap.Data.TypeConverter == null)
{
// Skip if the type isn't convertible.
continue;
}
fieldExpression = CreateMemberExpression(recordParameterConverted, context.WriterConfiguration.Maps[type], memberMap);
var typeConverterExpression = Expression.Constant(memberMap.Data.TypeConverter);
memberMap.Data.TypeConverterOptions = TypeConverterOptions.Merge(new TypeConverterOptions(), context.WriterConfiguration.TypeConverterOptionsFactory.GetOptions(memberMap.Data.Member.MemberType()), memberMap.Data.TypeConverterOptions);
memberMap.Data.TypeConverterOptions.CultureInfo = context.WriterConfiguration.CultureInfo;
var method = typeof(ITypeConverter).GetMethod(nameof(ITypeConverter.ConvertToString));
fieldExpression = Expression.Convert(fieldExpression, typeof(object));
fieldExpression = Expression.Call(typeConverterExpression, method, fieldExpression, Expression.Constant(this), Expression.Constant(memberMap.Data));
if (type.GetTypeInfo().IsClass)
{
var areEqualExpression = Expression.Equal(recordParameterConverted, Expression.Constant(null));
fieldExpression = Expression.Condition(areEqualExpression, Expression.Constant(string.Empty), fieldExpression);
}
}
var writeFieldMethodCall = Expression.Call(Expression.Constant(this), nameof(WriteConvertedField), null, fieldExpression);
delegates.Add(Expression.Lambda <Action <T> >(writeFieldMethodCall, recordParameter).Compile());
}
var action = CombineDelegates(delegates);
return(action);
}
/// <summary>
/// Creates a <see cref="Delegate"/> of type <see cref="Action{T}"/>
/// that will write the given record using the current writer row.
/// </summary>
/// <typeparam name="T">The record type.</typeparam>
/// <param name="record">The record.</param>
protected override Action <T> CreateWriteDelegate <T>(T record)
{
var type = Writer.GetTypeForRecord(record);
if (Writer.Context.Maps[type] == null)
{
Writer.Context.Maps.Add(Writer.Context.AutoMap(type));
}
var recordParameter = Expression.Parameter(typeof(T), "record");
var recordParameterConverted = Expression.Convert(recordParameter, type);
// Get a list of all the members so they will
// be sorted properly.
var members = new MemberMapCollection();
members.AddMembers(Writer.Context.Maps[type]);
if (members.Count == 0)
{
throw new WriterException(Writer.Context, $"No properties are mapped for type '{type.FullName}'.");
}
var delegates = new List <Action <T> >();
foreach (var memberMap in members)
{
if (memberMap.Data.WritingConvertExpression != null)
{
// The user is providing the expression to do the conversion.
var argsType = typeof(ConvertToStringArgs <T>);
var newArgsExpression = Expression.New(argsType);
var fieldBinding = Expression.Bind(argsType.GetProperty(nameof(ConvertToStringArgs <T> .Value)), recordParameterConverted);
var args = Expression.MemberInit(newArgsExpression, fieldBinding);
Expression exp = Expression.Invoke(memberMap.Data.WritingConvertExpression, args);
exp = Expression.Call(Expression.Constant(Writer), nameof(Writer.WriteField), null, exp);
delegates.Add(Expression.Lambda <Action <T> >(exp, recordParameter).Compile());
continue;
}
if (!Writer.CanWrite(memberMap))
{
continue;
}
Expression fieldExpression;
if (memberMap.Data.IsConstantSet)
{
if (memberMap.Data.Constant == null)
{
fieldExpression = Expression.Constant(string.Empty);
}
else
{
fieldExpression = Expression.Constant(memberMap.Data.Constant);
var typeConverterExpression = Expression.Constant(Writer.Context.TypeConverterCache.GetConverter(memberMap.Data.Constant.GetType()));
var method = typeof(ITypeConverter).GetMethod(nameof(ITypeConverter.ConvertToString));
fieldExpression = Expression.Convert(fieldExpression, typeof(object));
fieldExpression = Expression.Call(typeConverterExpression, method, fieldExpression, Expression.Constant(Writer), Expression.Constant(memberMap.Data));
}
}
else
{
if (memberMap.Data.TypeConverter == null)
{
// Skip if the type isn't convertible.
continue;
}
fieldExpression = ExpressionManager.CreateGetMemberExpression(recordParameterConverted, Writer.Context.Maps[type], memberMap);
var typeConverterExpression = Expression.Constant(memberMap.Data.TypeConverter);
memberMap.Data.TypeConverterOptions = TypeConverterOptions.Merge(new TypeConverterOptions {
CultureInfo = Writer.Configuration.CultureInfo
}, Writer.Context.TypeConverterOptionsCache.GetOptions(memberMap.Data.Member.MemberType()), memberMap.Data.TypeConverterOptions);
var method = typeof(ITypeConverter).GetMethod(nameof(ITypeConverter.ConvertToString));
fieldExpression = Expression.Convert(fieldExpression, typeof(object));
fieldExpression = Expression.Call(typeConverterExpression, method, fieldExpression, Expression.Constant(Writer), Expression.Constant(memberMap.Data));
if (type.GetTypeInfo().IsClass)
{
var areEqualExpression = Expression.Equal(recordParameterConverted, Expression.Constant(null));
fieldExpression = Expression.Condition(areEqualExpression, Expression.Constant(string.Empty), fieldExpression);
}
}
var writeFieldMethodCall = Expression.Call(Expression.Constant(Writer), nameof(Writer.WriteConvertedField), null, fieldExpression, Expression.Constant(memberMap.Data.Type));
delegates.Add(Expression.Lambda <Action <T> >(writeFieldMethodCall, recordParameter).Compile());
}
var action = CombineDelegates(delegates) ?? new Action <T>((T parameter) => { });
return(action);
}
