/// <summary>
/// Provides the implementation for operations that get member values. Classes derived from the <see cref="T:System.Dynamic.DynamicObject" /> class can override this method to specify dynamic behavior for operations such as getting a value for a property.
/// </summary>
/// <param name="binder">Provides information about the object that called the dynamic operation. The binder.Name property provides the name of the member on which the dynamic operation is performed. For example, for the Console.WriteLine(sampleObject.SampleProperty) statement, where sampleObject is an instance of the class derived from the <see cref="T:System.Dynamic.DynamicObject" /> class, binder.Name returns "SampleProperty". The binder.IgnoreCase property specifies whether the member name is case-sensitive.</param>
/// <param name="result">The result of the get operation. For example, if the method is called for a property, you can assign the property value to <paramref name="result" />.</param>
/// <returns>
/// True if the operation is successful; otherwise, false. If this method returns false, the run-time binder of the language determines the behavior. (In most cases, a run-time exception is thrown.).
/// </returns>
/// <exception cref="System.ArgumentNullException">Thrown when <paramref name="binder"/> is null.</exception>
public override bool TryGetMember(
GetMemberBinder binder,
out object result)
{
if (binder == null)
{
throw new ArgumentNullException("binder");
}
result = null;
RecordField field = this.GetField(binder.Name);
if (field == null)
{
return(false);
}
result = this.values[field.Position];
return(true);
}
private List <RecordField> BuildReaderFields(RecordSchema w, RecordSchema r, int startPosition)
{
var readerFieldsWithDefault = r.Fields.Where(field => field.HasDefaultValue);
var fieldsToAdd = new List <RecordField>();
foreach (var readerField in readerFieldsWithDefault)
{
if (!w.Fields.Any(f => this.DoNamesMatch(f, readerField)))
{
var newField = new RecordField(
readerField.NamedEntityAttributes,
readerField.TypeSchema,
readerField.Order,
readerField.HasDefaultValue,
readerField.DefaultValue,
readerField.MemberInfo,
startPosition++)
{
UseDefaultValue = true
};
fieldsToAdd.Add(newField);
}
}
if (r.RuntimeType == typeof(AvroRecord) &&
r.Fields.Any(rf => !rf.HasDefaultValue && !w.Fields.Any(wf => this.DoNamesMatch(wf, rf))))
{
throw new SerializationException(
string.Format(
CultureInfo.InvariantCulture,
"Fields without default values found in type '{0}'. Not corresponding writer fields found.",
r.RuntimeType));
}
return(fieldsToAdd);
}
/// <summary>
/// Tries to get a field given its name.
/// </summary>
/// <param name="fieldName">Name of the field.</param>
/// <param name="result">The result.</param>
/// <returns>A record field.</returns>
internal bool TryGetField(string fieldName, out RecordField result)
{
return(this.fiedsByName.TryGetValue(fieldName, out result));
}
private bool DoNamesMatch(RecordField w, RecordField r)
{
return(r.FullName == w.FullName || r.Aliases.Contains(w.FullName));
}
