ulxr_valueparse.cpp

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/**************************************************************************
               ulxr_valueparse.cpp  -  parse xml-rpc primitive values
                             -------------------
    begin                : Wed Mar 13 2002
    copyright            : (C) 2002-2007 by Ewald Arnold
    email                : ulxmlrpcpp@ewald-arnold.de

    $Id: ulxr_valueparse.cpp 940 2006-12-30 18:22:05Z ewald-arnold $

 ***************************************************************************/

/**************************************************************************
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 ***************************************************************************/

//#define ULXR_DEBUG_OUTPUT

#define ULXR_NEED_EXPORTS
#include <ulxmlrpcpp/ulxmlrpcpp.h>

#include <ulxmlrpcpp/ulxr_valueparse.h>
#include <ulxmlrpcpp/ulxr_except.h>

#ifdef DEBUG
#include <iostream>
#endif


namespace ulxr {


ULXR_API_IMPL0 ValueParser::ValueParser()
  : ValueParserBase()
{
  ULXR_TRACE(ULXR_PCHAR("ValueParser::ValueParser()"));
  states.push(new ValueState(eNone));
}


ULXR_API_IMPL0 ValueParser::~ValueParser()
{
  ULXR_TRACE(ULXR_PCHAR("ValueParser::~ValueParser()"));

#ifdef DEBUG
  if (states.size() != 1)
    std::cerr << ulxr_i18n("########## abnormal program behaviour: states.size() != 1: ")
              << states.size()
              << std::endl;

  if (getTopValueState()->getParserState() != eNone)
    std::cerr << ulxr_i18n("########## abnormal program behaviour: getTopState()->getState() != eNone: ")
              << getTopValueState()->getParserState()
              << std::endl;
#endif

  while (states.size() != 0)
  {
    delete getTopValueState()->getValue();
    delete getTopValueState();
    states.pop();
  }
}



ULXR_API_IMPL(ValueParserBase::ValueState *) ValueParser::getTopValueState() const
{
  ULXR_TRACE(ULXR_PCHAR("ValueParser::getTopState() size: ") << states.size());
#ifdef DEBUG
  ValueState *vs = dynamic_cast<ValueState*> (states.top());      // be careful about type
  if (vs == 0)
  {
    ULXR_TRACE(ULXR_PCHAR("ValueParser::getTopState(), top state: ") << (void*) states.top());
    ULXR_TRACE(ULXR_PCHAR("ValueParser::getTopState(): state <> ValueState"));
    ULXR_TRACE(ULXR_PCHAR("ValueParser::getTopState(): state == ") << ULXR_GET_STRING(typeid(states.top()).name()));
  }
  return vs;
#else
  return reinterpret_cast<ValueParserBase::ValueState*> (states.top());  // dont care anymore
#endif
}


ULXR_API_IMPL(void)
  ValueParser::startElement(const XML_Char* name, const XML_Char** atts)
{
  ULXR_TRACE(ULXR_PCHAR("ValueParser::startElement(const XML_Char*, const char**)"));
  if (!testStartElement(name, atts))
    XmlParser::testStartElement(name, atts);
}


ULXR_API_IMPL(bool)
  ValueParser::testStartElement(const XML_Char* name, const XML_Char** /* atts */)
{
  ULXR_TRACE(ULXR_PCHAR("ValueParser::testStartElement(const XML_Char*, const char**)")
             << ULXR_PCHAR("\n  name: ")
             << ULXR_GET_STRING(name)
            );
  switch(getTopValueState()->getParserState() )
  {
    case eNone:
      if (strcmp(name, "value") == 0)
        states.push(new ValueState(eValue));
      else
        return false;
    break;

    case eValue:
      if (strcmp(name, "array") == 0)
        states.push(new ValueState(eArray));

      else if (strcmp(name, "struct") == 0)
        states.push(new ValueState(eStruct));

      else if (strcmp(name, "boolean") == 0)
        states.push(new ValueState(eBoolean));

      else if (strcmp(name, "int") == 0)
        states.push(new ValueState(eInt));

      else if (strcmp(name, "i4") == 0)
        states.push(new ValueState(eI4));

      else if (strcmp(name, "double") == 0)
        states.push(new ValueState(eDouble));

      else if (strcmp(name, "string") == 0)
        states.push(new ValueState(eString));

      else if (strcmp(name, "base64") == 0)
        states.push(new ValueState(eBase64));

      else if (strcmp(name, "dateTime.iso8601") == 0)
        states.push(new ValueState(eDate));

      else
        return false;
    break;

    case eStruct:
      if (strcmp(name, "member") == 0)
      {
        if (getTopValueState()->getValue() == 0)  // first closing member adds struct-item
          getTopValueState()->takeValue(new Value(Struct()) );
        states.push(new MemberState(eMember, getTopValueState()->getValue()));
      }
      else
        return false;
    break;

    case eMember:
      if (strcmp(name, "name") == 0)
        states.push(new ValueState(eName));

      else if (strcmp(name, "value") == 0)
        states.push(new ValueState(eValue));

      else
        return false;

    break;

    case eArray:
      if (strcmp(name, "data") == 0)
        states.push(new ArrayState(eData));
      else
        return false;
    break;

    case eData:
      if (strcmp(name, "value") == 0)  // closing value adds data-items
        states.push(new ValueState(eValue));
      else
        return false;
    break;

    default:
        return false;
  }

  return true;
}


ULXR_API_IMPL(void) ValueParser::endElement(const XML_Char *name)
{
  ULXR_TRACE(ULXR_PCHAR("ValueParser::endElement(const XML_Char*)"));
  if (!testEndElement(name))
    XmlParser::testEndElement(name);
}


ULXR_API_IMPL(bool) ValueParser::testEndElement(const XML_Char *name)
{
  ULXR_TRACE(ULXR_PCHAR("ValueParser::testEndElement(const XML_Char*)"));

  if (states.size() <= 1)
    throw RuntimeException(ApplicationError, ulxr_i18n(ULXR_PCHAR("abnormal program behaviour: ValueParser::testEndElement() had no states left")));

  ValueState *curr = getTopValueState();
  states.pop();
/*
  ULXR_DOUT (ULXR_GET_STRING(name)
             << ULXR_PCHAR(" = cur-val: ")
             << std::hex << (void*) curr->getValue()
             << ULXR_PCHAR(" state: ")
             << std::hex << (void*) curr->getParserState()
             << ULXR_PCHAR(" prev state: ")
             << std::hex << (void*) curr->getPrevParserState()
             << std::dec);
*/
  states.top()->setPrevParserState(curr->getParserState());
  switch(curr->getParserState() )
  {
    case eBoolean:
      assertEndElement(name, "boolean");
      getTopValueState()->takeValue(new Value(Boolean(curr->getCharData())) );
    break;

    case eInt:
      assertEndElement(name, "int");
      getTopValueState()->takeValue(new Value(Integer(curr->getCharData())) );
    break;

    case eI4:
      assertEndElement(name, "i4");
      getTopValueState()->takeValue(new Value(Integer(curr->getCharData())) );
    break;

    case eDouble:
      assertEndElement(name, "double");
      getTopValueState()->takeValue(new Value(Double(curr->getCharData())) );
    break;

    case eString:
      assertEndElement(name, "string");
      getTopValueState()->takeValue(new Value(RpcString(curr->getCharData())) );
    break;

    case eBase64:
    {
      assertEndElement(name, "base64");
      Base64 b64;
      b64.setBase64(curr->getCharData()); // move raw data!
      getTopValueState()->takeValue(new Value(b64));
    }
    break;

    case eDate:
      assertEndElement(name , "dateTime.iso8601");
      getTopValueState()->takeValue(new Value(DateTime(curr->getCharData())) );
    break;

    case eMember:
      assertEndElement(name, "member");
      getTopValueState()->takeValue (curr->getValue());
    break;

    case eName:
      assertEndElement(name, "name");
      getTopValueState()->takeName((curr->getCharData()) );
    break;

    case eValue:
      assertEndElement(name, "value");
      if (curr->getValue() == 0)     // special case
      {
        if(curr->getPrevParserState() == eArray)            // not empty Array
           getTopValueState()->takeValue (new Value(Array()));

        else if (curr->getPrevParserState() == eStruct)     // not empty Struct
           getTopValueState()->takeValue (new Value(Struct()));

        else                                                // no type tag defaults to string
          getTopValueState()->takeValue (new Value(RpcString(curr->getCharData())));
      }
      else
        getTopValueState()->takeValue (curr->getValue());
    break;

    case eStruct:
      assertEndElement(name, "struct");
      getTopValueState()->takeValue (curr->getValue());
    break;

    case eArray:
      assertEndElement(name, "array");
      getTopValueState()->takeValue (curr->getValue());
    break;

    case eData:
      assertEndElement(name, "data");
      getTopValueState()->takeValue (curr->getValue());
    break;

    default:
      states.push(curr);
      return false;
  }
  delete curr;
  return true;
}


}  // namespace ulxr

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