/*
* $Id$
*
* Copyright (C) 2003-2014 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.shell.syntax;
import javax.naming.NameNotFoundException;
import org.jnode.driver.Device;
import org.jnode.driver.DeviceAPI;
import org.jnode.driver.DeviceManager;
import org.jnode.driver.DeviceNotFoundException;
import org.jnode.driver.console.CompletionInfo;
import org.jnode.naming.InitialNaming;
import org.jnode.shell.CommandLine.Token;
/**
* This argument class accepts and completes device ids.
*
* @author qades
* @author crawley@jnode.org
*/
public class DeviceArgument extends Argument<Device> {
private final Class<? extends DeviceAPI> apiClass;
public DeviceArgument(String label, int flags, String description,
Class<? extends DeviceAPI> apiClass) {
super(label, flags, new Device[0], description);
this.apiClass = apiClass;
}
public DeviceArgument(String label, int flags, String description) {
this(label, flags, description, null);
}
public DeviceArgument(String label, int flags) {
this(label, flags, null, null);
}
@Override
protected Device doAccept(Token token, int flags) throws CommandSyntaxException {
try {
final DeviceManager devMgr = getDeviceManager();
final Device device = devMgr.getDevice(token.text);
if (apiClass == null || device.implementsAPI(apiClass)) {
return device;
} else {
throw new CommandSyntaxException("this device does not implement the " +
apiClass.getSimpleName() + " API");
}
} catch (DeviceNotFoundException ex) {
throw new CommandSyntaxException("unknown device");
}
}
@Override
public void doComplete(CompletionInfo completions, String partial, int flags) {
final DeviceManager devMgr = getDeviceManager();
// collect matching devices
for (Device dev : devMgr.getDevices()) {
if (apiClass != null && !dev.implementsAPI(apiClass)) {
continue;
}
final String devId = dev.getId();
if (devId.startsWith(partial)) {
completions.addCompletion(devId);
}
}
}
private DeviceManager getDeviceManager() {
try {
return InitialNaming.lookup(DeviceManager.NAME);
} catch (NameNotFoundException ex) {
throw new SyntaxFailureException("DeviceManager not found. Check your system setup");
}
}
@Override
protected String state() {
return super.state() + ",apiClass=" + apiClass.getName();
}
@Override
protected String argumentKind() {
if (apiClass == null) {
return "device";
} else {
return "device(" + apiClass.getSimpleName() + ")";
}
}
}