55 lines
1.7 KiB
Java
55 lines
1.7 KiB
Java
/** Copyright (c) 2010 Scott A. Crosby. <scott@sacrosby.com>
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as
|
|
published by the Free Software Foundation, either version 3 of the
|
|
License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
*/
|
|
|
|
package crosby.binary.file;
|
|
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
|
|
import com.google.protobuf.ByteString;
|
|
|
|
/**
|
|
* A FileBlockPosition that remembers what file this is so that it can simply be
|
|
* dereferenced
|
|
*/
|
|
public class FileBlockReference extends FileBlockPosition {
|
|
|
|
/**
|
|
* Convenience cache for storing the input this reference is contained
|
|
* within so that it can be cached
|
|
*/
|
|
protected InputStream input;
|
|
|
|
protected FileBlockReference(String type, ByteString indexdata) {
|
|
super(type, indexdata);
|
|
}
|
|
|
|
public FileBlock read() throws IOException {
|
|
return read(input);
|
|
}
|
|
|
|
static FileBlockPosition newInstance(FileBlockBase base, InputStream input,
|
|
long offset, int length) {
|
|
FileBlockReference out = new FileBlockReference(base.type,
|
|
base.indexdata);
|
|
out.datasize = length;
|
|
out.data_offset = offset;
|
|
out.input = input;
|
|
return out;
|
|
}
|
|
}
|