public BlockRead getCachedMetaBlock(String blockName) throws IOException {
String _lookup = fileName + "M" + blockName;
if (_iCache != null) {
CacheEntry cacheEntry = _iCache.getBlock(_lookup);
if (cacheEntry != null) {
return new CachedBlockRead(cacheEntry, cacheEntry.getBuffer());
}
}
return null;
}
private BlockRead getBlock(String _lookup, BlockCache cache, BlockLoader loader)
throws IOException {
BlockReader _currBlock;
if (cache != null) {
CacheEntry cb = null;
cb = cache.getBlock(_lookup);
if (cb != null) {
return new CachedBlockRead(cb, cb.getBuffer());
}
}
/** grab the currBlock at this point the block is still in the data stream */
_currBlock = loader.get();
/** If the block is bigger than the cache just return the stream */
return cacheBlock(_lookup, cache, _currBlock, loader.getInfo());
}