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/*
D-Bus Java Implementation
Copyright (c) 2005-2006 Matthew Johnson
This program is free software; you can redistribute it and/or modify it
under the terms of either the GNU Lesser General Public License Version 2 or the
Academic Free Licence Version 2.1.
Full licence texts are included in the COPYING file with this program.
*/
package org.freedesktop.dbus;
import static org.freedesktop.dbus.Gettext._;
import java.lang.reflect.Constructor;
import java.lang.reflect.GenericDeclaration;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Vector;
import org.freedesktop.dbus.exceptions.DBusException;
import org.freedesktop.dbus.exceptions.MessageFormatException;
import cx.ath.matthew.debug.Debug;
public class DBusSignal extends Message
{
DBusSignal() { }
public DBusSignal(String source, String path, String iface, String member, String sig, Object... args) throws DBusException
{
super(Message.Endian.BIG, Message.MessageType.SIGNAL, (byte) 0);
if (null == path || null == member || null == iface)
throw new MessageFormatException(_("Must specify object path, interface and signal name to Signals."));
headers.put(Message.HeaderField.PATH,path);
headers.put(Message.HeaderField.MEMBER,member);
headers.put(Message.HeaderField.INTERFACE,iface);
Vector<Object> hargs = new Vector<Object>();
hargs.add(new Object[] { Message.HeaderField.PATH, new Object[] { ArgumentType.OBJECT_PATH_STRING, path } });
hargs.add(new Object[] { Message.HeaderField.INTERFACE, new Object[] { ArgumentType.STRING_STRING, iface } });
hargs.add(new Object[] { Message.HeaderField.MEMBER, new Object[] { ArgumentType.STRING_STRING, member } });
if (null != source) {
headers.put(Message.HeaderField.SENDER,source);
hargs.add(new Object[] { Message.HeaderField.SENDER, new Object[] { ArgumentType.STRING_STRING, source } });
}
if (null != sig) {
hargs.add(new Object[] { Message.HeaderField.SIGNATURE, new Object[] { ArgumentType.SIGNATURE_STRING, sig } });
headers.put(Message.HeaderField.SIGNATURE,sig);
setArgs(args);
}
blen = new byte[4];
appendBytes(blen);
append("ua(yv)", ++serial, hargs.toArray());
pad((byte)8);
long c = bytecounter;
if (null != sig) append(sig, args);
marshallint(bytecounter-c, blen, 0, 4);
bodydone = true;
}
static class internalsig extends DBusSignal
{
public internalsig(String source, String objectpath, String type, String name, String sig, Object[] parameters, long serial) throws DBusException
{
super(source, objectpath, type, name, sig, parameters, serial);
}
}
private static Map<Class<? extends DBusSignal>, Type[]> typeCache = new HashMap<Class<? extends DBusSignal>, Type[]>();
private static Map<String, Class<? extends DBusSignal>> classCache = new HashMap<String, Class<? extends DBusSignal>>();
private static Map<Class<? extends DBusSignal>, Constructor<? extends DBusSignal>> conCache = new HashMap<Class<? extends DBusSignal>, Constructor<? extends DBusSignal>>();
private static Map<String, String> signames = new HashMap<String, String>();
private static Map<String, String> intnames = new HashMap<String, String>();
private Class<? extends DBusSignal> c;
private boolean bodydone = false;
private byte[] blen;
static void addInterfaceMap(String java, String dbus)
{
intnames.put(dbus, java);
}
static void addSignalMap(String java, String dbus)
{
signames.put(dbus, java);
}
static DBusSignal createSignal(Class<? extends DBusSignal> c, String source, String objectpath, String sig, long serial, Object... parameters) throws DBusException
{
String type = "";
if (null != c.getEnclosingClass()) {
if (null != c.getEnclosingClass().getAnnotation(DBusInterfaceName.class))
type = c.getEnclosingClass().getAnnotation(DBusInterfaceName.class).value();
else
type = AbstractConnection.dollar_pattern.matcher(c.getEnclosingClass().getName()).replaceAll(".");
} else
throw new DBusException(_("Signals must be declared as a member of a class implementing DBusInterface which is the member of a package."));
DBusSignal s = new internalsig(source, objectpath, type, c.getSimpleName(), sig, parameters, serial);
s.c = c;
return s;
}
@SuppressWarnings("unchecked")
private static Class<? extends DBusSignal> createSignalClass(String intname, String signame) throws DBusException
{
String name = intname+'$'+signame;
Class<? extends DBusSignal> c = classCache.get(name);
if (null == c) c = DBusMatchRule.getCachedSignalType(name);
if (null != c) return c;
do {
try {
c = (Class<? extends DBusSignal>) Class.forName(name);
} catch (ClassNotFoundException CNFe) {}
name = name.replaceAll("\\.([^\\.]*)$", "\\$$1");
} while (null == c && name.matches(".*\\..*"));
if (null == c)
throw new DBusException(_("Could not create class from signal ")+intname+'.'+signame);
classCache.put(name, c);
return c;
}
@SuppressWarnings("unchecked")
DBusSignal createReal(AbstractConnection conn) throws DBusException
{
String intname = intnames.get(getInterface());
String signame = signames.get(getName());
if (null == intname) intname = getInterface();
if (null == signame) signame = getName();
if (null == c)
c = createSignalClass(intname,signame);
if (Debug.debug) Debug.print(Debug.DEBUG, "Converting signal to type: "+c);
Type[] types = typeCache.get(c);
Constructor<? extends DBusSignal> con = conCache.get(c);
if (null == types) {
con = (Constructor<? extends DBusSignal>) c.getDeclaredConstructors()[0];
conCache.put(c, con);
Type[] ts = con.getGenericParameterTypes();
types = new Type[ts.length-1];
for (int i = 1; i < ts.length; i++)
if (ts[i] instanceof TypeVariable)
for (Type b: ((TypeVariable<GenericDeclaration>) ts[i]).getBounds())
types[i-1] = b;
else
types[i-1] = ts[i];
typeCache.put(c, types);
}
try {
DBusSignal s;
Object[] args = Marshalling.deSerializeParameters(getParameters(), types, conn);
if (null == args) s = (DBusSignal) con.newInstance(getPath());
else {
Object[] params = new Object[args.length + 1];
params[0] = getPath();
System.arraycopy(args, 0, params, 1, args.length);
if (Debug.debug) Debug.print(Debug.DEBUG, "Creating signal of type "+c+" with parameters "+Arrays.deepToString(params));
s = (DBusSignal) con.newInstance(params);
}
s.headers = headers;
s.wiredata = wiredata;
s.bytecounter = wiredata.length;
return s;
} catch (Exception e) {
if (AbstractConnection.EXCEPTION_DEBUG && Debug.debug) Debug.print(Debug.ERR, e);
throw new DBusException(e.getMessage());
}
}
/**
* Create a new signal.
* This contructor MUST be called by all sub classes.
* @param objectpath The path to the object this is emitted from.
* @param args The parameters of the signal.
* @throws DBusException This is thrown if the subclass is incorrectly defined.
*/
@SuppressWarnings("unchecked")
protected DBusSignal(String objectpath, Object... args) throws DBusException
{
super(Message.Endian.BIG, Message.MessageType.SIGNAL, (byte) 0);
if (!objectpath.matches(AbstractConnection.OBJECT_REGEX)) throw new DBusException(_("Invalid object path: ")+objectpath);
Class<? extends DBusSignal> tc = getClass();
String member;
if (tc.isAnnotationPresent(DBusMemberName.class))
member = tc.getAnnotation(DBusMemberName.class).value();
else
member = tc.getSimpleName();
String iface = null;
Class<? extends Object> enc = tc.getEnclosingClass();
if (null == enc ||
!DBusInterface.class.isAssignableFrom(enc) ||
enc.getName().equals(enc.getSimpleName()))
throw new DBusException(_("Signals must be declared as a member of a class implementing DBusInterface which is the member of a package."));
else
if (null != enc.getAnnotation(DBusInterfaceName.class))
iface = enc.getAnnotation(DBusInterfaceName.class).value();
else
iface = AbstractConnection.dollar_pattern.matcher(enc.getName()).replaceAll(".");
headers.put(Message.HeaderField.PATH,objectpath);
headers.put(Message.HeaderField.MEMBER,member);
headers.put(Message.HeaderField.INTERFACE,iface);
Vector<Object> hargs = new Vector<Object>();
hargs.add(new Object[] { Message.HeaderField.PATH, new Object[] { ArgumentType.OBJECT_PATH_STRING, objectpath } });
hargs.add(new Object[] { Message.HeaderField.INTERFACE, new Object[] { ArgumentType.STRING_STRING, iface } });
hargs.add(new Object[] { Message.HeaderField.MEMBER, new Object[] { ArgumentType.STRING_STRING, member } });
String sig = null;
if (0 < args.length) {
try {
Type[] types = typeCache.get(tc);
if (null == types) {
Constructor<? extends DBusSignal> con = (Constructor<? extends DBusSignal>) tc.getDeclaredConstructors()[0];
conCache.put(tc, con);
Type[] ts = con.getGenericParameterTypes();
types = new Type[ts.length-1];
for (int i = 1; i <= types.length; i++)
if (ts[i] instanceof TypeVariable)
types[i-1] = ((TypeVariable<GenericDeclaration>) ts[i]).getBounds()[0];
else
types[i-1] = ts[i];
typeCache.put(tc, types);
}
sig = Marshalling.getDBusType(types);
hargs.add(new Object[] { Message.HeaderField.SIGNATURE, new Object[] { ArgumentType.SIGNATURE_STRING, sig } });
headers.put(Message.HeaderField.SIGNATURE,sig);
setArgs(args);
} catch (Exception e) {
if (AbstractConnection.EXCEPTION_DEBUG && Debug.debug) Debug.print(Debug.ERR, e);
throw new DBusException(_("Failed to add signal parameters: ")+e.getMessage());
}
}
blen = new byte[4];
appendBytes(blen);
append("ua(yv)", ++serial, hargs.toArray());
pad((byte)8);
}
void appendbody(AbstractConnection conn) throws DBusException
{
if (bodydone) return;
Type[] types = typeCache.get(getClass());
Object[] args = Marshalling.convertParameters(getParameters(), types, conn);
setArgs(args);
String sig = getSig();
long c = bytecounter;
if (null != args && 0 < args.length) append(sig, args);
marshallint(bytecounter-c, blen, 0, 4);
bodydone = true;
}
}
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