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org.freedesktop.dbus.messages.Error Maven / Gradle / Ivy
Improved version of the DBus-Java library provided by freedesktop.org (https://dbus.freedesktop.org/doc/dbus-java/).
This is the OSGi compliant bundle of all required libraries in one bundle.
package org.freedesktop.dbus.messages;
import static org.freedesktop.dbus.utils.CommonRegexPattern.EXCEPTION_EXTRACT_PATTERN;
import static org.freedesktop.dbus.utils.CommonRegexPattern.EXCEPTION_PARTIAL_PATTERN;
import org.freedesktop.dbus.connections.AbstractConnection;
import org.freedesktop.dbus.exceptions.DBusException;
import org.freedesktop.dbus.exceptions.DBusExecutionException;
import org.freedesktop.dbus.exceptions.MessageFormatException;
import org.freedesktop.dbus.messages.constants.ArgumentType;
import org.freedesktop.dbus.messages.constants.HeaderField;
import org.freedesktop.dbus.messages.constants.MessageType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.util.*;
import java.util.stream.Collectors;
/**
* Error messages which can be sent over the bus.
*/
public class Error extends Message {
private static final String DEFAULT_NULL_EXCEPTION_ERROR_MSG = "Unsupported NULL Exception";
private static final Logger LOGGER = LoggerFactory.getLogger(Error.class);
protected Error() {
}
protected Error(byte _endianess, String _dest, String _errorName, long _replyserial, String _sig, Object... _args) throws DBusException {
this(_endianess, null, _dest, _errorName, _replyserial, _sig, _args);
}
protected Error(byte _endianess, String _source, String _dest, String _errorName, long _replyserial, String _sig, Object... _args)
throws DBusException {
super(_endianess, MessageType.ERROR, (byte) 0);
if (null == _errorName) {
throw new MessageFormatException("Must specify error name to Errors.");
}
List hargs = new ArrayList<>();
hargs.add(createHeaderArgs(HeaderField.ERROR_NAME, ArgumentType.STRING_STRING, _errorName));
hargs.add(createHeaderArgs(HeaderField.REPLY_SERIAL, ArgumentType.UINT32_STRING, _replyserial));
if (null != _source) {
hargs.add(createHeaderArgs(HeaderField.SENDER, ArgumentType.STRING_STRING, _source));
}
if (null != _dest) {
hargs.add(createHeaderArgs(HeaderField.DESTINATION, ArgumentType.STRING_STRING, _dest));
}
if (null != _sig) {
hargs.add(createHeaderArgs(HeaderField.SIGNATURE, ArgumentType.SIGNATURE_STRING, _sig));
setArgs(_args);
}
padAndMarshall(hargs, getSerial(), _sig, _args);
}
protected Error(byte _endianess, String _source, Message _m, Throwable _ex) throws DBusException {
this(_endianess, _source, _m.getSource(),
AbstractConnection.DOLLAR_PATTERN.matcher(Optional.ofNullable(_ex).orElse(new IOException(DEFAULT_NULL_EXCEPTION_ERROR_MSG)).getClass().getName()).replaceAll("."),
_m.getSerial(), "s", _ex == null ? DEFAULT_NULL_EXCEPTION_ERROR_MSG : _ex.getMessage());
}
protected Error(byte _endianess, Message _m, Throwable _ex) throws DBusException {
this(_endianess, _m.getSource(),
AbstractConnection.DOLLAR_PATTERN.matcher(Optional.ofNullable(_ex).orElse(new IOException(DEFAULT_NULL_EXCEPTION_ERROR_MSG)).getClass().getName()).replaceAll("."),
_m.getSerial(), "s", _ex == null ? DEFAULT_NULL_EXCEPTION_ERROR_MSG : _ex.getMessage());
}
@SuppressWarnings("unchecked")
private static Class createExceptionClass(String _name) {
Class c = null;
String name = _name;
// Fix package name for DBus own error messages
if (name.startsWith("org.freedesktop.DBus.Error.")) {
name = name.replace("org.freedesktop.DBus.Error.", "org.freedesktop.dbus.errors.");
}
do {
try {
c = (Class) Class.forName(name);
} catch (ClassNotFoundException _exCnf) {
LOGGER.trace("Could not find class for name {}", name, _exCnf);
}
name = EXCEPTION_EXTRACT_PATTERN.matcher(name).replaceAll("\\$$1");
} while (null == c && EXCEPTION_PARTIAL_PATTERN.matcher(name).matches());
return c;
}
/**
* Turns this into an exception of the correct type
*
* @return exception
*/
public DBusExecutionException getException() {
try {
Class c = createExceptionClass(getName());
if (null == c || !DBusExecutionException.class.isAssignableFrom(c)) {
c = DBusExecutionException.class;
}
Constructor con = c.getConstructor(String.class);
DBusExecutionException ex;
Object[] args = getParameters();
if (null == args || 0 == args.length) {
ex = con.newInstance("");
} else {
ex = con.newInstance(Arrays.stream(args).map(Objects::toString).collect(Collectors.joining(" ")).trim());
}
return ex;
} catch (Exception _ex1) {
logger.debug("", _ex1);
DBusExecutionException ex;
Object[] args = null;
try {
args = getParameters();
} catch (Exception _ex2) {
LOGGER.trace("Cannot retrieve parameters", _ex2);
}
if (null == args || 0 == args.length) {
ex = new DBusExecutionException("");
} else {
ex = new DBusExecutionException(Arrays.stream(args).map(Objects::toString).collect(Collectors.joining(" ")).trim());
}
return ex;
}
}
/**
* Throw this as an exception of the correct type
*/
public void throwException() throws DBusExecutionException {
throw getException();
}
}
