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// $Id$
#include "orbsvcs/Notify/XML_Loader.h"
#include "orbsvcs/Notify/Topology_Object.h"
#include "ACEXML/common/DefaultHandler.h"
#include "ACEXML/parser/parser/Parser.h"
#include "ACEXML/common/FileCharStream.h"
#include "ace/Containers_T.h"
#include "tao/debug.h"
#include "ace/OS_NS_unistd.h"
//#define DEBUG_LEVEL 9
#ifndef DEBUG_LEVEL
# define DEBUG_LEVEL TAO_debug_level
#endif //DEBUG_LEVEL
using namespace TAO_Notify;
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
namespace TAO_Notify {
extern const char TOPOLOGY_ID_NAME[];
}
TAO_END_VERSIONED_NAMESPACE_DECL
namespace {
CORBA::Long makeNVPList (NVPList& nvp, ACEXML_Attributes* attrs)
{
CORBA::Long id = 0;
for (size_t i = 0; i < attrs->getLength (); ++i)
{
const ACE_TCHAR * name = attrs->getQName (i);
const ACE_TCHAR * value = attrs->getValue (i);
if (ACE_OS::strcmp (name,
//TOPOLOGY_ID_NAME) == 0)
TAO_VERSIONED_NAMESPACE_NAME::TAO_Notify::TOPOLOGY_ID_NAME) == 0)
{
id = ACE_OS::atoi (value);
}
nvp.push_back (NVP (ACE_TEXT_TO_CHAR_IN(name),
ACE_TEXT_TO_CHAR_IN(value)));
}
return id;
}
}
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
namespace TAO_Notify
{
XML_Loader::XML_Loader ()
: input_ (0)
, live_ (false)
{
}
XML_Loader::~XML_Loader ()
{
}
bool
XML_Loader::open (const ACE_CString & base_name)
{
bool result = false;
// if *.xml exists, use it
// if it does not exist then
// use the previous one was renamed to *.000
// If neither *.xml nor *.000 exist then something
// "impossible" happened (or its a new system with no saved state).
this->file_name_ = base_name;
this->file_name_ += ".xml";
// 4 is "read permission"
result = (0 == ACE_OS::access (this->file_name_.c_str (), 4));
if (result)
{
this->live_ = false;
ACEXML_FileCharStream* fstm = new ACEXML_FileCharStream;
// xml input source will take ownership
if (fstm->open (ACE_TEXT_TO_TCHAR_IN(this->file_name_.c_str ())) == 0)
{
// InputSource takes ownership
ACEXML_InputSource input (fstm);
ACEXML_Parser parser;
parser.setContentHandler (this);
parser.setDTDHandler (this);
parser.setErrorHandler (this);
parser.setEntityResolver (this);
ACEXML_TRY_NEW_ENV
{
parser.parse (&input ACEXML_ENV_ARG_PARAMETER);
ACEXML_TRY_CHECK;
}
ACEXML_CATCH (ACEXML_Exception, ex)
{
// The only way to find out what it is, it to let it print itself, so...
ACE_ERROR ((LM_ERROR, "Unable to load \"%s\".\n Will try backup file.\n", this->file_name_.c_str ()));
ex.print ();
result = false;
}
ACEXML_ENDTRY;
}
else
{
ACE_DEBUG((LM_DEBUG, ACE_TEXT("Unable to open the XML input file: %s.\n Will try backup file.\n"), file_name_.c_str()));
result = false;
}
}
if (! result)
{
this->file_name_ = base_name;
this->file_name_ += ".000";
result = (0 == ACE_OS::access (this->file_name_.c_str (), 4));
}
return result;
}
//virtual
void
XML_Loader::load (Topology_Object *root ACE_ENV_ARG_DECL)
{
ACE_ASSERT (root != 0);
this->live_ = true;
ACEXML_FileCharStream* fstm = new ACEXML_FileCharStream;
// xml input source will take ownership
if (fstm->open (ACE_TEXT_TO_TCHAR_IN(this->file_name_.c_str ())) == 0)
{
// InputSource takes ownership
ACEXML_InputSource input (fstm);
ACEXML_Parser parser;
parser.setContentHandler (this);
parser.setDTDHandler (this);
parser.setErrorHandler (this);
parser.setEntityResolver (this);
ACEXML_TRY_NEW_ENV
{
object_stack_.push (root);
parser.parse (&input ACEXML_ENV_ARG_PARAMETER);
ACEXML_TRY_CHECK;
ACE_ASSERT (object_stack_.size () == 1);
Topology_Object* cur;
object_stack_.pop (cur);
}
ACEXML_CATCH (ACEXML_Exception, ex)
{
// The only way to find out what it is, it to let it print itself, so...
ACE_ERROR ((LM_ERROR, "Unable to load \"%s\".\n", this->file_name_.c_str ()));
ex.print ();
ACE_THROW(CORBA::INTERNAL());
}
ACEXML_ENDTRY;
}
else
{
ACE_DEBUG((LM_DEBUG, ACE_TEXT("Unable to open the XML input file: %s.\n"), file_name_.c_str()));
ACE_THROW(CORBA::INTERNAL());
}
}
void
XML_Loader::startElement (const ACEXML_Char*,
const ACEXML_Char*,
const ACEXML_Char* name,
ACEXML_Attributes* xml_attrs ACEXML_ENV_ARG_DECL)
ACE_THROW_SPEC ( (ACEXML_SAXException))
{
ACE_ASSERT (name != 0);
ACE_ASSERT (xml_attrs != 0);
if (this->live_)
{
ACE_ASSERT (object_stack_.size () > 0);
Topology_Object* cur = 0;
if (object_stack_.top (cur) == 0)
{
ACE_DECLARE_NEW_ENV;
ACE_TRY
{
NVPList attrs;
CORBA::Long id = makeNVPList (attrs, xml_attrs);
if (DEBUG_LEVEL > 5) ACE_DEBUG ((LM_INFO,
ACE_TEXT("(%P|%t) XML_Loader: Element %s\n"),
name
));
ACE_CString cname (ACE_TEXT_TO_CHAR_IN(name));
Topology_Object* next = cur->load_child (
cname, id, attrs ACE_ENV_ARG_PARAMETER);
ACE_ASSERT(next != 0);
ACE_TRY_CHECK;
object_stack_.push (next);
}
ACE_CATCHANY
{
ACEXML_THROW (ACEXML_SAXException (ACE_TEXT_TO_TCHAR_IN(
ACE_ANY_EXCEPTION._info ().c_str ())));
}
ACE_ENDTRY;
}
}
}
void
XML_Loader::endElement (const ACEXML_Char*,
const ACEXML_Char*,
const ACEXML_Char* name ACEXML_ENV_ARG_DECL_NOT_USED)
ACE_THROW_SPEC ( (ACEXML_SAXException))
{
ACE_UNUSED_ARG (name);
if (this->live_)
{
ACE_ASSERT (object_stack_.size () > 0);
if (DEBUG_LEVEL > 5) ACE_DEBUG ((LM_INFO,
ACE_TEXT("(%P|%t) XML_Loader: End Element %s\n"),
name
));
Topology_Object* cur;
object_stack_.pop (cur);
}
}
} /* namespace TAO_Notify */
TAO_END_VERSIONED_NAMESPACE_DECL
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