/**
* Write the header and data portion to IoInterface implementor. Primarily for freechain create as
* we used writeUsed otherwise
*
* @param fobj the IoInterface
* @exception IOException error writing field
*/
public synchronized void write(IoInterface fobj) throws IOException {
// synchronized(fobj) {
fobj.Fwrite_long(getPrevblk());
fobj.Fwrite_long(getNextblk());
fobj.Fwrite_short(getBytesused());
fobj.Fwrite_short(getBytesinuse());
fobj.Fwrite_long(getPageLSN());
fobj.Fwrite(data);
// }
}
/**
* read the header and data portion from IoInterface implementor
*
* @param fobj the IoInterface
* @exception IOException error reading field
*/
public synchronized void read(IoInterface fobj) throws IOException {
// synchronized(fobj) {
setPrevblk(fobj.Fread_long());
setNextblk(fobj.Fread_long());
setBytesused(fobj.Fread_short());
setBytesinuse(fobj.Fread_short());
setPageLSN(fobj.Fread_long());
if (fobj.Fread(data, datasize) != datasize) {
throw new IOException("Datablock read size invalid " + this.toString());
}
// }
}
/**
* read the header and used data portion from IoInterface implementor
*
* @param fobj the IoInterface
* @exception IOException error reading field
*/
public synchronized void readUsed(IoInterface fobj) throws IOException {
// synchronized(fobj) {
setPrevblk(fobj.Fread_long());
setNextblk(fobj.Fread_long());
setBytesused(fobj.Fread_short());
setBytesinuse(fobj.Fread_short());
setPageLSN(fobj.Fread_long());
if (getBytesused() > datasize) {
throw new IOException("block inconsistency " + this.toString());
}
if (getBytesused() == datasize) {
if (fobj.Fread(data) != datasize) {
throw new IOException("Datablock read size invalid " + this.toString());
}
} else {
if (fobj.Fread(data, getBytesused()) != getBytesused()) {
throw new IOException(
"Datablock read error bytesused="
+ String.valueOf(getBytesused())
+ " bytesinuse="
+ String.valueOf(getBytesinuse()));
}
}
// }
}
