public virtual int encodeSequencePreamble(object obj, PropertyInfo[] fields, System.IO.Stream stream, ElementInfo elementInfo)
{
int resultBitSize = 0;
ElementInfo info = new ElementInfo();
int fieldIdx = 0;
foreach (PropertyInfo field in fields)
{
if (elementInfo.hasPreparedInfo())
{
info.PreparedInfo = elementInfo.PreparedInfo.getPropertyMetadata(fieldIdx);
}
if (CoderUtils.isOptionalField(field, info))
{
object invokeObjResult = invokeGetterMethodForField(field, obj, info);
if (invokeObjResult == null)
{
((BitArrayOutputStream)stream).writeBit(false);
}
else if (CoderUtils.isDefaultField(field, info))
{
object newSequenceInstance = Activator.CreateInstance(obj.GetType());
CoderUtils.initDefaultValues(newSequenceInstance);
object defaultFieldValue = invokeGetterMethodForField(field, newSequenceInstance, info);
((BitArrayOutputStream)stream).writeBit(!CoderUtils.AreEqual(defaultFieldValue, invokeObjResult));
}
else
{
((BitArrayOutputStream)stream).writeBit(true);
}
resultBitSize += 1;
}
fieldIdx++;
}
doAlign(stream);
return((resultBitSize / 8) + (resultBitSize % 8 > 0?1:0));
}