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/** 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;
}
}
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