private void ensureCapacity() throws IOException {
if (offset >= BLOCK_SIZE) {
// get the next block
if (blockCount >= usedBlocks.length) {
int[] blocks = new int[blockCount * 2];
System.arraycopy(usedBlocks, 0, blocks, 0, usedBlocks.length);
Arrays.fill(blocks, usedBlocks.length, blocks.length, -1);
usedBlocks = blocks;
}
int nextBlockId = usedBlocks[blockCount];
if (nextBlockId == -1) {
nextBlockId = file.allocBlock();
usedBlocks[blockCount] = nextBlockId;
}
// flush the current block into the disk
if (blockId != -1) {
BTreeUtils.integerToBytes(nextBlockId, bytes);
file.writeBlock(blockId, bytes);
}
blockId = nextBlockId;
blockCount++;
Arrays.fill(bytes, (byte) 0);
offset = 4;
}
}
public NodeOutputStream(NodeFile file) throws IOException {
this(file, new int[] {file.allocBlock()});
}
