/* XXL: The eXtensible and fleXible Library for data processing
Copyright (C) 2000-2011 Prof. Dr. Bernhard Seeger
Head of the Database Research Group
Department of Mathematics and Computer Science
University of Marburg
Germany
This library 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 library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; If not, see <http://www.gnu.org/licenses/>.
http://code.google.com/p/xxl/
*/
package xxl.core.io.raw;
import xxl.core.util.Decorator;
/**
* Decorates a RawAccess.
*/
public class DecoratorRawAccess implements RawAccess, Decorator<RawAccess> {
/**
* The RawAccess to be decorated.
*/
protected RawAccess ra;
/**
* Constructs a new decorator for a RawAccess.
* @param ra The RawAccess to be decorated.
*/
public DecoratorRawAccess(RawAccess ra) {
this.ra = ra;
}
/**
* Opens a device/file.
*
* @param filename name of file or device
* @exception RawAccessException a specialized RuntimeException
*/
public void open(String filename) throws RawAccessException {
ra.open(filename);
}
/**
* Closes a device/file.
*
* @exception RawAccessException a specialized RuntimeException
*/
public void close() throws RawAccessException {
ra.close();
}
/**
* Writes a sector of a characteristic length to the file/device.
*
* @param block byte array which will be written to the sector
* @param sector number of the sector in the file/device where the block will be written
* @exception RawAccessException a specialized RuntimeException
*/
public void write(byte[] block, long sector) throws RawAccessException {
ra.write(block, sector);
}
/**
* Reads a sector of characteristic Bytes length from the file/device.
*
* @param block byte array of which will be written to the sector
* @param sector number of the sector in the file/device from where the block will be read
* @exception RawAccessException a specialized RuntimeException
*/
public void read(byte[] block, long sector) throws RawAccessException {
ra.read(block, sector);
}
/**
* Returns the amount of sectors in the file/device.
*
* @return amount of sectors
*/
public long getNumSectors() {
return ra.getNumSectors();
}
/**
* Returns the size of a sector of the file/device.
*
* @return size of sectors
*/
public int getSectorSize() {
return ra.getSectorSize();
}
/**
* Outputs a String representation of the raw device.
* @return A String representation.
*/
@Override
public String toString() {
return "Decorator raw access of: "+ra;
}
/**
* Returns the internally used RawAccess.
* @return Returns the internally used RawAccess.
*/
@Override
public RawAccess getDecoree() {
return ra;
}
}