public byte[] getBlockBytes(int blockAddress, int blockCount) {
byte[] dataBytes = new byte[blockCount * lobBlockSize];
int dataBlockOffset = 0;
while (blockCount > 0) {
int largeBlockIndex = blockAddress / blocksInLargeBlock;
byte[] largeBlock = (byte[]) byteStoreList.get(largeBlockIndex);
int blockOffset = blockAddress % blocksInLargeBlock;
int currentBlockCount = blockCount;
if ((blockOffset + currentBlockCount) > blocksInLargeBlock) {
currentBlockCount = blocksInLargeBlock - blockOffset;
}
System.arraycopy(
largeBlock,
blockOffset * lobBlockSize,
dataBytes,
dataBlockOffset * lobBlockSize,
currentBlockCount * lobBlockSize);
blockAddress += currentBlockCount;
dataBlockOffset += currentBlockCount;
blockCount -= currentBlockCount;
}
return dataBytes;
}
/** Add all columns to a list of expressions */
void addTableColumns(HsqlArrayList exprList) {
if (namedJoinColumns != null) {
int count = exprList.size();
int position = 0;
for (int i = 0; i < count; i++) {
Expression e = (Expression) exprList.get(i);
String columnName = e.getColumnName();
if (namedJoinColumns.contains(columnName)) {
if (position != i) {
exprList.remove(i);
exprList.add(position, e);
}
e = getColumnExpression(columnName);
exprList.set(position, e);
position++;
}
}
}
addTableColumns(exprList, exprList.size(), namedJoinColumns);
}
public void setBlockBytes(byte[] dataBytes, int blockAddress, int blockCount) {
int dataBlockOffset = 0;
while (blockCount > 0) {
int largeBlockIndex = blockAddress / blocksInLargeBlock;
int largeBlockLimit = (blockAddress + blockCount) / blocksInLargeBlock;
if ((blockAddress + blockCount) % blocksInLargeBlock != 0) {
largeBlockLimit++;
}
if (largeBlockIndex >= byteStoreList.size()) {
byteStoreList.add(new byte[largeBlockSize]);
}
byte[] largeBlock = (byte[]) byteStoreList.get(largeBlockIndex);
int blockOffset = blockAddress % blocksInLargeBlock;
int currentBlockCount = blockCount;
if ((blockOffset + currentBlockCount) > blocksInLargeBlock) {
currentBlockCount = blocksInLargeBlock - blockOffset;
}
System.arraycopy(
dataBytes,
dataBlockOffset * lobBlockSize,
largeBlock,
blockOffset * lobBlockSize,
currentBlockCount * lobBlockSize);
blockAddress += currentBlockCount;
dataBlockOffset += currentBlockCount;
blockCount -= currentBlockCount;
}
}