/// <summary>
/// Outputs the elements in memory into the specified output file.
/// </summary>
/// <param name="outputStream"></param>
/// <returns></returns>
public int Serialize(RandomAccessFile outputStream)
{
try
{
var elementCount = GetCount();
var startingLocation = (int)outputStream.getFilePointer();
outputStream.writeInt(elementCount);
var location = (int)outputStream.getFilePointer();
for (int elementIndex = 0; elementIndex < elementCount; ++elementIndex)
{
var ordinal = (int)mElements[elementIndex].mType;
outputStream.writeInt((int)mElements[elementIndex].mType); // Convert to ordinal
location = (int)outputStream.getFilePointer();
outputStream.writeInt(mElements[elementIndex].mSize);
location = (int)outputStream.getFilePointer();
outputStream.writeBytes(mElements[elementIndex].mText);
location = (int)outputStream.getFilePointer();
}
var bytesWritten = (int)outputStream.getFilePointer() - startingLocation;
return(bytesWritten);
}
catch (Exception)
{
return(0);
}
}
public VariableLengthRecordFile(String folder, String filename)
{
mPathname = folder;
mPathname += ("/");
mPathname += (filename);
mPathname += (".dat");
mFileStream = new RandomAccessFile(mPathname);
if (mFileStream.length() > 0)
{
mFileStream.seek(0);
mBytesUsed = mFileStream.readInt();
}
else
{
mBytesUsed = 0;
mFileStream.writeInt(mBytesUsed);
}
}
/// <summary>
/// Adds the record and returns the starting offset and number of bytes written.
/// </summary>
/// <param name="record"></param>
/// <param name="dataFileOffset"></param>
/// <param name="dataSizeBytes"></param>
/// <returns></returns>
public bool Append(VariableLengthRecord record, ref int dataFileOffset, ref int dataSizeBytes)
{
try
{
dataFileOffset = (int)mFileStream.length();
mFileStream.seek(dataFileOffset); // Seek to the end of the file
dataSizeBytes = record.Serialize(mFileStream); // Convert the record to the stream
mBytesUsed += dataSizeBytes;
mFileStream.seek(0);
mFileStream.writeInt(mBytesUsed);
return(true);
}
catch (Exception)
{
return(false);
}
}