package crosby.binary.file;
import com.google.protobuf.ByteString;
/**
* Base class that contains the metadata about a fileblock.
*
* Subclasses of this include additional fields, such as byte offsets that let a
* fileblock be read in a random-access fashion, or the data itself.
*
* @author crosby
*
*/
public class FileBlockBase {
/** If a block header is bigger than this, fail. We use excessively large header size as an indication of corrupt files */
static final int MAX_HEADER_SIZE = 64*1024;
/** If a block's size is bigger than this, fail. We use excessively large block sizes as an indication of corrupt files */
static final int MAX_BODY_SIZE = 32*1024*1024;
protected FileBlockBase(String type, ByteString indexdata) {
this.type = type;
this.indexdata = indexdata;
}
/** Identifies the type of the data within a block */
protected final String type;
/**
* Block metadata, stored in the index block and as a prefix for every
* block.
*/
protected final ByteString indexdata;
public String getType() {
return type;
}
public ByteString getIndexData() {
return indexdata;
}
}