public virtual void SetBlockSize(PXFileHeader.BlockSize blockSize)
{
this.blockSize = blockSize;
}
/// <summary>read (little endian)</summary>
/// <exception cref="Com.Khubla.Pdxreader.Api.PDXReaderException"/>
public virtual void Read(LittleEndianDataInputStream littleEndianDataInputStream)
{
try
{
/*
* The index record length is six greater than the sum of the lengths of the key fields.
*/
indexRecordLength = littleEndianDataInputStream.ReadUnsignedShort();
headerBlockSize = littleEndianDataInputStream.ReadUnsignedShort();
if (2048 != headerBlockSize)
{
throw new Exception("headerBlockSize was expected to be 2048, but '" + headerBlockSize
+ "' was found");
}
int fileType = littleEndianDataInputStream.ReadUnsignedByte();
if (1 != fileType)
{
throw new Exception("PX file type was expected to be 1, but '" + fileType + "' was found"
);
}
dataBlockSizeCode = littleEndianDataInputStream.ReadUnsignedByte();
if (1 == dataBlockSizeCode)
{
blockSize = PXFileHeader.BlockSize.oneK;
}
else
{
if (2 == dataBlockSizeCode)
{
blockSize = PXFileHeader.BlockSize.twoK;
}
else
{
if (3 == dataBlockSizeCode)
{
blockSize = PXFileHeader.BlockSize.threeK;
}
else
{
if (4 == dataBlockSizeCode)
{
blockSize = PXFileHeader.BlockSize.fourK;
}
else
{
throw new Exception("Unknown block size code '" + dataBlockSizeCode + "'");
}
}
}
}
numberRecords = littleEndianDataInputStream.ReadInt();
blocksInUse = littleEndianDataInputStream.ReadUnsignedShort();
totalBlocksInFile = littleEndianDataInputStream.ReadUnsignedShort();
firstDataBlock = littleEndianDataInputStream.ReadUnsignedShort();
if (1 != firstDataBlock)
{
throw new Exception("firstDataBlock was expected to be 1, but '" + firstDataBlock
+ "' was found");
}
lastDataBlock = littleEndianDataInputStream.ReadUnsignedShort();
indexRootBlock = littleEndianDataInputStream.ReadUnsignedShort();
numberIndexLevels = littleEndianDataInputStream.ReadUnsignedByte();
/*
* The number of fields in the index is the same as the number of key fields for the table.
*/
numberIndexFields = littleEndianDataInputStream.ReadUnsignedByte();
}
catch (Exception e)
{
throw new PDXReaderException("Exception in read", e);
}
}
