/// <summary>
/// Loads the input file stream into memory.
/// </summary>
/// <param name="inputStream"></param>
/// <returns></returns>
public bool Deserialize(RandomAccessFile inputStream)
{
try
{
var elementCount = inputStream.readInt();
for (int elementIndex = 0; elementIndex < elementCount; ++elementIndex)
{
var elementTypeOrdinal = inputStream.readInt();
var elementType = (VariableLengthRecord.RecordElementType)elementTypeOrdinal;
var size = inputStream.readInt();
String value = String.Empty;
if (size == inputStream.read(ref value, size))
{
RecordElement recordElement = new
RecordElement(elementType, value);
mElements.Add(recordElement);
}
}
return(true);
}
catch (Exception)
{
return(false);
}
}
/// <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);
}
}
