protected bool Equals(SchemaPair other)
{
return(Equals(_writerSchema, other._writerSchema) && Equals(_readerSchema, other._readerSchema));
}
private ReadItem ResolveRecord(RecordSchema writerSchema, RecordSchema readerSchema)
{
var schemaPair = new SchemaPair(writerSchema, readerSchema);
ReadItem recordReader;
if (_recordReaders.TryGetValue(schemaPair, out recordReader))
{
return(recordReader);
}
FieldReader[] fieldReaderArray = null;
var recordAccess = GetRecordAccess(readerSchema);
recordReader = (r, d) => ReadRecord(r, d, recordAccess, fieldReaderArray);
_recordReaders.Add(schemaPair, recordReader);
var readSteps = new List <FieldReader>();
foreach (Field wf in writerSchema)
{
Field rf;
if (readerSchema.TryGetFieldAlias(wf.Name, out rf))
{
var readItem = ResolveReader(wf.Schema, rf.Schema);
if (IsReusable(rf.Schema.Tag))
{
readSteps.Add((rec, d) => recordAccess.AddField(rec, rf.Name, rf.Pos,
readItem(recordAccess.GetField(rec, rf.Name, rf.Pos), d)));
}
else
{
readSteps.Add((rec, d) => recordAccess.AddField(rec, rf.Name, rf.Pos,
readItem(null, d)));
}
}
else
{
var skip = GetSkip(wf.Schema);
readSteps.Add((rec, d) => skip(d));
}
}
// fill in defaults for any reader fields not in the writer schema
foreach (Field rf in readerSchema)
{
if (writerSchema.Contains(rf.Name))
{
continue;
}
var defaultStream = new MemoryStream();
var defaultEncoder = new BinaryEncoder(defaultStream);
defaultStream.Position = 0; // reset for writing
Resolver.EncodeDefaultValue(defaultEncoder, rf.Schema, rf.DefaultValue);
defaultStream.Flush();
var defaultBytes = defaultStream.ToArray();
var readItem = ResolveReader(rf.Schema, rf.Schema);
var rfInstance = rf;
if (IsReusable(rf.Schema.Tag))
{
readSteps.Add((rec, d) => recordAccess.AddField(rec, rfInstance.Name, rfInstance.Pos,
readItem(recordAccess.GetField(rec, rfInstance.Name, rfInstance.Pos),
new BinaryDecoder(new MemoryStream(defaultBytes)))));
}
else
{
readSteps.Add((rec, d) => recordAccess.AddField(rec, rfInstance.Name, rfInstance.Pos,
readItem(null, new BinaryDecoder(new MemoryStream(defaultBytes)))));
}
}
fieldReaderArray = readSteps.ToArray();
return(recordReader);
}
