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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 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 java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.Map;
import org.freedesktop.dbus.exceptions.DBusException;
import org.freedesktop.dbus.exceptions.DBusExecutionException;
class ExportedObject
{
private String getAnnotations(AnnotatedElement c)
{
String ans = "";
for (Annotation a: c.getDeclaredAnnotations()) {
Class t = a.annotationType();
String value = "";
try {
Method m = t.getMethod("value");
value = m.invoke(a).toString();
} catch (NoSuchMethodException NSMe) {
} catch (InvocationTargetException ITe) {
} catch (IllegalAccessException IAe) {}
ans += " <annotation name=\""+AbstractConnection.dollar_pattern.matcher(t.getName()).replaceAll(".")+"\" value=\""+value+"\" />\n";
}
return ans;
}
private Map<MethodTuple,Method> getExportedMethods(Class c) throws DBusException
{
if (DBusInterface.class.equals(c)) return new HashMap<MethodTuple,Method>();
Map<MethodTuple,Method> m = new HashMap<MethodTuple,Method>();
for (Class i: c.getInterfaces())
if (DBusInterface.class.equals(i)) {
// don't let people export things which don't have a
// valid D-Bus interface name
if (i.getName().equals(i.getSimpleName()))
throw new DBusException("DBusInterfaces cannot be declared outside a package");
// add this class's public methods
if (c.getName().length() > DBusConnection.MAX_NAME_LENGTH)
throw new DBusException("Introspected interface name exceeds 255 characters. Cannot export objects of type "+c.getName()+".");
if (null != c.getAnnotation(DBusInterfaceName.class))
introspectiondata += " <interface name=\""+((DBusInterfaceName) c.getAnnotation(DBusInterfaceName.class)).value()+"\">\n";
else
introspectiondata += " <interface name=\""+AbstractConnection.dollar_pattern.matcher(c.getName()).replaceAll(".")+"\">\n";
introspectiondata += getAnnotations(c);
for (Method meth: c.getDeclaredMethods())
if (Modifier.isPublic(meth.getModifiers())) {
String ms = "";
if (meth.getName().length() > DBusConnection.MAX_NAME_LENGTH)
throw new DBusException("Introspected method name exceeds 255 characters. Cannot export objects with method "+meth.getName()+".");
introspectiondata += " <method name=\""+meth.getName()+"\" >\n";
introspectiondata += getAnnotations(meth);
for (Class ex: meth.getExceptionTypes())
if (DBusExecutionException.class.isAssignableFrom(ex))
introspectiondata +=
" <annotation name=\"org.freedesktop.DBus.Method.Error\" value=\""+AbstractConnection.dollar_pattern.matcher(ex.getName()).replaceAll(".")+"\" />\n";
for (Type pt: meth.getGenericParameterTypes())
for (String s: Marshalling.getDBusType(pt)) {
introspectiondata += " <arg type=\""+s+"\" direction=\"in\"/>\n";
ms += s;
}
if (!Void.TYPE.equals(meth.getGenericReturnType())) {
if (Tuple.class.isAssignableFrom((Class) meth.getReturnType())) {
ParameterizedType tc = (ParameterizedType) meth.getGenericReturnType();
Type[] ts = tc.getActualTypeArguments();
for (Type t: ts)
if (t != null)
for (String s: Marshalling.getDBusType(t))
introspectiondata += " <arg type=\""+s+"\" direction=\"out\"/>\n";
} else if (Object[].class.equals(meth.getGenericReturnType())) {
throw new DBusException("Return type of Object[] cannot be introspected properly");
} else
for (String s: Marshalling.getDBusType(meth.getGenericReturnType()))
introspectiondata += " <arg type=\""+s+"\" direction=\"out\"/>\n";
}
introspectiondata += " </method>\n";
m.put(new MethodTuple(meth.getName(), ms), meth);
}
for (Class sig: c.getDeclaredClasses())
if (DBusSignal.class.isAssignableFrom(sig)) {
if (sig.getSimpleName().length() > DBusConnection.MAX_NAME_LENGTH)
throw new DBusException("Introspected signal name exceeds 255 characters. Cannot export objects with signals of type "+sig.getSimpleName()+".");
introspectiondata += " <signal name=\""+sig.getSimpleName()+"\">\n";
Constructor con = sig.getConstructors()[0];
Type[] ts = con.getGenericParameterTypes();
for (int j = 1; j < ts.length; j++)
for (String s: Marshalling.getDBusType(ts[j]))
introspectiondata += " <arg type=\""+s+"\" direction=\"out\" />\n";
introspectiondata += getAnnotations(sig);
introspectiondata += " </signal>\n";
}
introspectiondata += " </interface>\n";
} else {
// recurse
m.putAll(getExportedMethods(i));
}
return m;
}
Map<MethodTuple,Method> methods;
DBusInterface object;
String introspectiondata;
public ExportedObject(DBusInterface object) throws DBusException
{
this.object = object;
introspectiondata = "";
methods = getExportedMethods(object.getClass());
introspectiondata +=
" <interface name=\"org.freedesktop.DBus.Introspectable\">\n"+
" <method name=\"Introspect\">\n"+
" <arg type=\"s\" direction=\"out\"/>\n"+
" </method>\n"+
" </interface>\n";
introspectiondata +=
" <interface name=\"org.freedesktop.DBus.Peer\">\n"+
" <method name=\"Ping\">\n"+
" </method>\n"+
" </interface>\n";
}
}
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