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/***************************************************************************
*
* Copyright 2010,2011 BMW Car IT GmbH
*
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
****************************************************************************/
#include "DBUSIntrospection.h"
#include <string.h>
#include <sstream>
using std::stringstream;
DBUSIntrospection::DBUSIntrospection(MethodTable* methodTable, SignalTable* signalTable)
: m_methodTable(methodTable), m_signalTable(signalTable)
{
generateString();
}
void DBUSIntrospection::generateString()
{
DLT_LOG(DBusPlugin,DLT_LOG_ERROR, DLT_STRING("Generating instrospection data!"));
addHeader();
openNode("");
openInterface("org.freedesktop.DBus.Introspectable");
openMethod("Introspect");
addArgument("data", "out", "s");
closeMethod();
closeInterface();
openInterface(DBUS_SERVICE_PREFIX);
int index = 0;
while (strcmp(m_methodTable[index].name, "") != 0)
{
MethodTable entry = m_methodTable[index];
addEntry(entry);
++index;
}
index=0;
if (m_signalTable) {
while (strcmp(m_signalTable[index].name, "") != 0)
{
SignalTable entry = m_signalTable[index];
addEntry(entry);
++index;
}
}
closeInterface();
closeNode();
}
void DBUSIntrospection::addHeader(void)
{
m_introspectionString << "<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS"
<< "Object Introspection 1.0//EN\"\n \"http://www.freedesktop.org/standards/"
<< "dbus/1.0/introspect.dtd\"> \n";
}
void DBUSIntrospection::openNode(string nodename)
{
m_introspectionString << "<node name=\"" << nodename << "\"> \n";
}
void DBUSIntrospection::openInterface(string interfacename)
{
m_introspectionString << "<interface name=\"" << interfacename << "\"> \n";
}
void DBUSIntrospection::openMethod(string methodname)
{
m_introspectionString << "<method name=\"" << methodname << "\"> \n";
}
void DBUSIntrospection::addSignal(string signalname) {
m_introspectionString<<"<signal name=\"" << signalname << "\"> \n";
}
void DBUSIntrospection::addArgument(string argname, string direction, string type)
{
m_introspectionString << "<arg name=\"" << argname << "\" direction=\""
<< direction << "\" type=\"" << type << "\"/> \n";
}
void DBUSIntrospection::closeMethod(void)
{
m_introspectionString << "</method> \n";
}
void DBUSIntrospection::closeInterface(void)
{
m_introspectionString << "</interface> \n";
}
void DBUSIntrospection::closeNode(void)
{
m_introspectionString << "</node> \n";
}
void DBUSIntrospection::addEntry(MethodTable entry)
{
string methodName = entry.name;
string parameterArray = entry.signature;
string returnValueArray = string(entry.reply);
openMethod(methodName);
for(uint parameterIndex = 0; parameterIndex < parameterArray.length(); ++parameterIndex)
{
switch (parameterArray.at(parameterIndex))
{
case 'a':
parameterIndex++;
addArgument("", "in", "a" + parameterArray.at(parameterIndex));
break;
default:
addArgument("param", "in", parameterArray.substr(parameterIndex,1));
break;
}
}
for(uint returnValueIndex = 0; returnValueIndex < returnValueArray.length(); ++returnValueIndex)
{
switch (returnValueArray.at(returnValueIndex))
{
case 'a':
returnValueIndex++;
addArgument("", "out", "a" + returnValueArray.at(returnValueIndex));
break;
default:
addArgument("param", "out", returnValueArray.substr(returnValueIndex,1));
break;
}
}
closeMethod();
}
void DBUSIntrospection::addEntry(SignalTable entry)
{
string methodName = entry.name;
string parameterArray = entry.signature;
addSignal(methodName);
for(uint parameterIndex = 0; parameterIndex < parameterArray.length(); ++parameterIndex)
{
switch (parameterArray.at(parameterIndex))
{
case 'a':
parameterIndex++;
addArgument("", "in", "a" + parameterArray.at(parameterIndex));
break;
default:
addArgument("param", "in", parameterArray.substr(parameterIndex,1));
break;
}
}
}
void DBUSIntrospection::process(DBusConnection* conn, DBusMessage* msg)
{
DBusMessage * reply;
DBusMessageIter args;
dbus_uint32_t serial = 0;
// create a reply from the message
reply = dbus_message_new_method_return(msg);
string introspect = m_introspectionString.str();
const char* string = introspect.c_str();
// add the arguments to the reply
dbus_message_iter_init_append(reply, &args);
if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING, &string))
{
DLT_LOG(DBusPlugin,DLT_LOG_ERROR, DLT_STRING("DBUS handler Out Of Memory!"));
}
// send the reply && flush the connection
if (!dbus_connection_send(conn, reply, &serial))
{
DLT_LOG(DBusPlugin,DLT_LOG_ERROR, DLT_STRING("DBUS handler Out Of Memory!"));
}
dbus_connection_flush(conn);
// free the reply
dbus_message_unref(reply);
}
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