/*
* $Id$
*
* Copyright (C) 2003-2015 JNode.org
*
* 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 2.1 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.apps.jpartition.model;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import javax.naming.NameNotFoundException;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.jnode.driver.ApiNotFoundException;
import org.jnode.driver.DeviceListener;
import org.jnode.driver.DeviceManager;
import org.jnode.driver.DeviceUtils;
import org.jnode.driver.block.PartitionableBlockDeviceAPI;
import org.jnode.driver.bus.ide.IDEConstants;
import org.jnode.driver.bus.ide.IDEDevice;
import org.jnode.fs.FileSystem;
import org.jnode.partitions.PartitionTableEntry;
import org.jnode.partitions.ibm.IBMPartitionTableEntry;
public class OSFacade {
private static final Logger LOG = Logger.getLogger(OSFacade.class);
@SuppressWarnings("unused")
private static Comparator<Partition> PARTITION_COMPARATOR = new Comparator<Partition>() {
public int compare(Partition p1, Partition p2) {
// we assume here that the partition doesn't intersect
return (int) (p1.getStart() - p2.getStart());
}
};
@SuppressWarnings("unchecked")
private static final Class<PartitionableBlockDeviceAPI> REQUIRED_API =
PartitionableBlockDeviceAPI.class;
static {
LOG.setLevel(Level.DEBUG);
}
private static final OSFacade INSTANCE;
static {
INSTANCE = new OSFacade();
}
private OSFacade() {
}
static final OSFacade getInstance() {
return INSTANCE;
}
final void setOSListener(final OSListener listener) throws OSFacadeException {
if (listener == null) {
throw new NullPointerException("listener is null");
}
try {
DeviceUtils.getDeviceManager().addListener(new DeviceListener() {
public void deviceStarted(org.jnode.driver.Device device) {
if (device instanceof IDEDevice) {
Device dev = null;
try {
dev = createDevice(device);
if (dev != null) {
listener.deviceAdded(dev);
}
} catch (OSFacadeException e) {
listener.errorHappened(e);
}
}
}
public void deviceStop(org.jnode.driver.Device device) {
if (device instanceof IDEDevice) {
Device dev = null;
try {
dev = createDevice(device);
if (dev != null) {
listener.deviceRemoved(dev);
}
} catch (OSFacadeException e) {
listener.errorHappened(e);
}
}
}
});
} catch (NameNotFoundException e) {
throw new OSFacadeException("error in setOSListener", e);
}
}
final List<Device> getDevices() throws OSFacadeException {
List<Device> devices = new ArrayList<Device>();
try {
DeviceManager devMan = org.jnode.driver.DeviceUtils.getDeviceManager();
for (org.jnode.driver.Device dev : devMan.getDevicesByAPI(REQUIRED_API)) {
Device device = createDevice(dev);
if (device != null) {
devices.add(device);
}
}
} catch (NameNotFoundException e) {
throw new OSFacadeException("error in getDevices", e);
}
return devices;
}
private Device createDevice(org.jnode.driver.Device dev) throws OSFacadeException {
LOG.debug("createDevice: wrapping device " + dev.getId());
Device device = null;
List<IBMPartitionTableEntry> partitions = getPartitions(dev);
if (partitions != null) { // null if not supported
LOG.debug("createDevice: nbPartitions=" + partitions.size());
long devSize = 0;
try {
devSize = dev.getAPI(REQUIRED_API).getLength();
} catch (ApiNotFoundException e) {
throw new OSFacadeException("error in createDevice", e);
} catch (IOException e) {
throw new OSFacadeException("error in createDevice", e);
}
// one empty partition taking all place
List<Partition> devPartitions = new ArrayList<Partition>(partitions.size());
devPartitions.add(new Partition(0L, devSize, false));
// add used partitions
device = new Device(dev.getId(), devSize, dev, devPartitions);
for (IBMPartitionTableEntry e : partitions) {
IBMPartitionTableEntry pte = (IBMPartitionTableEntry) e;
long start = pte.getStartLba();
long size = pte.getNrSectors() * IDEConstants.SECTOR_SIZE;
device.addPartition(start, size); // add a non-empty partition
}
}
LOG.debug("createDevice: return device=" + device);
return device;
}
private List<IBMPartitionTableEntry> getPartitions(org.jnode.driver.Device dev)
throws OSFacadeException {
boolean supported = false;
List<IBMPartitionTableEntry> partitions = new ArrayList<IBMPartitionTableEntry>();
try {
if (dev.implementsAPI(REQUIRED_API)) {
PartitionableBlockDeviceAPI<?> api = dev.getAPI(REQUIRED_API);
boolean supportedPartitions = true;
for (PartitionTableEntry e : api.getPartitionTable()) {
if (!(e instanceof IBMPartitionTableEntry)) {
// non IBM partition tables are not handled for now
supportedPartitions = false;
break;
}
IBMPartitionTableEntry entry = (IBMPartitionTableEntry) e;
if (entry.isValid() && !entry.isEmpty()) {
partitions.add(entry);
}
}
supported = supportedPartitions;
}
} catch (ApiNotFoundException e) {
throw new OSFacadeException("error in getPartitions", e);
} catch (IOException e) {
throw new OSFacadeException("error in getPartitions", e);
}
return supported ? partitions : null;
}
@SuppressWarnings("unused")
private FileSystem<?> getFileSystem(org.jnode.driver.Device dev, PartitionTableEntry pte) {
/*
* DeviceManager devMan = InitialNaming.lookup(DeviceManager.NAME);
* FileSystemService fss = InitialNaming.lookup(FileSystemService.NAME);
* Collection<Device> devices = devMan.getDevices(); FileSystem fs =
* null;
*
* for (Device device : devices) { if (device instanceof
* IDEDiskPartitionDevice) { IDEDiskPartitionDevice partition =
* (IDEDiskPartitionDevice)device; if ((partition.getParent() == dev) &&
* (partition.getPartitionTableEntry() == pte)) { //fs =
* fss.getFileSystem(device).get; break; } } }
*
* return fs;
*/
return null; // TODO
}
}