propertylist.cpp

OSB-PIK-OpenVXI-3.0.0源代码 “中国XML论坛 - 专业的XML技术讨论区--XML在语音技术中的应用”

 /****************License************************************************
  *
  * Copyright 2000-2003.  ScanSoft, Inc.    
  *
  * Use of this software is subject to notices and obligations set forth 
  * in the SpeechWorks Public License - Software Version 1.2 which is 
  * included with this software. 
  *
  * ScanSoft is a registered trademark of ScanSoft, Inc., and OpenSpeech, 
  * SpeechWorks and the SpeechWorks logo are registered trademarks or 
  * trademarks of SpeechWorks International, Inc. in the United States 
  * and other countries.
  *
  ***********************************************************************/
 

 #include "PropertyList.hpp"
 #include "CommonExceptions.hpp"       // for VXIException class
 #include "VXIinet.h"
 #include "VXML.h"
 #include "SimpleLogger.hpp"           // for SimpleLogger
 #include "DocumentParser.hpp"         // for string constants
 #include "DocumentModel.hpp"
 #include <sstream>
 
 // ------*---------*---------*---------*---------*---------*---------*---------
 
 // The use of spaces here creates identifiers which cannot be specified
 // within the property or meta tags.
 const VXIchar * const PropertyList::BaseURI     = L" base";
 const VXIchar * const PropertyList::Language    = L" lang";
 const VXIchar * const PropertyList::AbsoluteURI = L" absoluteURI";
 
 
 static vxistring toString(const VXIString * s)
 {
   if (s == NULL) return L"";
   const VXIchar * temp = VXIStringCStr(s);
   if (temp == NULL) return L"";
   return temp;
 }
 
 static vxistring toString(const VXIchar * s)
 {
   if (s == NULL) return L"";
   return s;
 }
 
 // ------*---------*---------*---------*---------*---------*---------*---------
 
 PropertyList::PropertyList(const SimpleLogger & l) : log(l)
 {
   properties.reserve(LAST_PROP);
   while (properties.size() < LAST_PROP)
     properties.push_back(STRINGMAP());
 }
 
 
 PropertyList::PropertyList(const PropertyList & p) : log(p.log)
 {
   properties = p.properties;
 }
 
 
 PropertyList& PropertyList::operator=(const PropertyList & x)
 {
   if (this != &x) {
     properties = x.properties;
   }
 
   return *this;
 }
 
 
 const VXIchar* PropertyList::GetProperty(const VXIchar * key,
                                          PropertyLevel L) const
 {
   int pos = L;
   do {
     if (pos == LAST_PROP) --pos;
     STRINGMAP::const_iterator i = properties[pos].find(key);
     if (i != properties[pos].end()) return (*i).second.c_str();
   } while (--pos >= 0);
 
   return NULL;
 }
 
 
 bool PropertyList::SetProperty(const VXIchar * key, const VXIchar * value,
                                PropertyLevel level)
 {
   if (level == LAST_PROP || key == NULL || value == NULL) return false;
 
   STRINGMAP & propmap = properties[level];
   propmap[key] = value;
 
   return true;
 }
 
 
 void PropertyList::SetProperties(const VXMLElement & doc, PropertyLevel level,
                                  const VXIMapHolder & docProps)
 {
   // (0) Check the arguments
 
   if (doc == 0) return;
 
   if (properties.size() != LAST_PROP) {
     log.LogError(999, SimpleLogger::MESSAGE,
                  L"internal property list corrupted");
     throw VXIException::Fatal();
   }
 
   // (1) Clear all properties at this level and above.
 #if 0
   for (unsigned int i = level; i < LAST_PROP; ++i)
     properties[i].clear();
 #endif
   properties[level].clear();
   STRINGMAP & propmap = properties[level];
 
   // (2) Add document properties.
 
   if (docProps.GetValue() != NULL) {
     const VXIValue * val;
     const VXIString * str;
 
     // (2.1) Handle document base URI.
     val = VXIMapGetProperty(docProps.GetValue(), PropertyList::BaseURI);
     str = reinterpret_cast<const VXIString *>(val);
     if (VXIStringLength(str) != 0)
       propmap.insert(propmap.end(),
                      STRINGMAP::value_type(PropertyList::BaseURI,
                                            toString(str)));
 
     // (2.2) Handle document language.  If the document property is not
     // specified, the value of the xml:lang property will be used.
 
     val = VXIMapGetProperty(docProps.GetValue(), PropertyList::Language);
     str = reinterpret_cast<const VXIString *>(val);
     if (VXIStringLength(str) != 0)
       propmap.insert(propmap.end(),
                      STRINGMAP::value_type(PropertyList::Language,
                                            toString(str)));
     else {
       const VXIchar * lang = GetProperty(L"xml:lang");
       if (lang != NULL)
         propmap.insert(propmap.end(),
                        STRINGMAP::value_type(PropertyList::Language,
                                              toString(lang)));
     }
     
     // (2.3) Handle document absolute URI.
     val = VXIMapGetProperty(docProps.GetValue(), PropertyList::AbsoluteURI);
     str = reinterpret_cast<const VXIString *>(val);
     if (VXIStringLength(str) != 0)
       propmap.insert(propmap.end(),
                      STRINGMAP::value_type(PropertyList::AbsoluteURI,
                                            toString(str)));
 
   }
 
   // (3) Walk through this level.  Find all <property> nodes and set the
   // corresponding values.
   for (VXMLNodeIterator it(doc); it; ++it) {
     VXMLNode child = *it;
 
     if (child.GetType() != VXMLNode::Type_VXMLElement) continue;
     const VXMLElement & elem = reinterpret_cast<const VXMLElement &>(child);
     VXMLElementType nodeName = elem.GetName();
     if (nodeName == NODE_PROPERTY) {
       vxistring name;
       vxistring value;
       elem.GetAttribute(ATTRIBUTE_NAME, name);
       elem.GetAttribute(ATTRIBUTE_VALUE, value);
       
       // This added the name / value pair, converting to vxistrings.
       propmap.insert(propmap.end(), STRINGMAP::value_type(name, value));
     }
   }
 }
 
 
 //****************************************************************
 //* Fetchobj building routines
 //****************************************************************
 
 bool PropertyList::ConvertTimeToMilliseconds(const SimpleLogger & log,
                                              const vxistring & time,
                                              VXIint & result)
 {
   result = 0;
 
   if (time.empty()) {
     log.LogDiagnostic(0, L"PropertyList::ConvertTimeToMilliseconds - empty");
     return false;
   }
 
   for (unsigned int i = 0; i < time.length(); ++i) {
     char c;
     switch (time[i]) {
     case L'+':  continue;
     case L'0':  c = 0;  break;
     case L'1':  c = 1;  break;
     case L'2':  c = 2;  break;
     case L'3':  c = 3;  break;
     case L'4':  c = 4;  break;
     case L'5':  c = 5;  break;
     case L'6':  c = 6;  break;
     case L'7':  c = 7;  break;
     case L'8':  c = 8;  break;
     case L'9':  c = 9;  break;
     default:
       const vxistring units = time.substr(i, time.length() - i);
       if (units == L"ms")
         return true;
       if (units == L"s") {
         result *= 1000;
         return true;
       }
 
       // Otherwise the unit type is not recognized.
 
       log.StartDiagnostic(0) << L"PropertyList::ConvertTimeToMilliseconds - "
         L"Invalid units in value \"" << time << L"\".";
       log.EndDiagnostic();
 
       return false;
     }
 
     result = 10*result + c;
   }
 
   // No units were specified.  Milliseconds are assumed.
   return true;
 }
 
 
 bool PropertyList::ConvertValueToFraction(const SimpleLogger & log,
                                           const vxistring & value,
                                           VXIflt32& result)
 {
 #if defined(__GNUC__)
   // The G++ 2.95/3.0 implementation of basic_stringstream is faulty.
   VXIchar * temp;
   result = VXIflt32(wcstod(value.c_str(), &temp));
   if (*temp) {
     result = -1.0;
     return false;
   }
 #else
   std::basic_stringstream<VXIchar> attrStream(value);
   attrStream >> result;
   if (attrStream.bad()) {
     result = -1.0;
     return false;
   }
 #endif
 
   return true;
 }
 
 
 void PropertyList::GetFetchobjCacheAttrs(const VXMLElement & elem,
                                          PropertyList::CacheAttrType type,
                                          VXIMapHolder & fetchobj) const
 {
   vxistring attr;
   const VXIchar * propName;
 
   // (1) Attribute: maxage
 
   // (1.1) Get the attribute - first locally, then from the defaults.
   elem.GetAttribute(ATTRIBUTE_MAXAGE, attr); 
   if (attr.empty()) {
     switch (type) {
     case PropertyList::Audio:      propName = L"audiomaxage";     break;
     case PropertyList::Document:   propName = L"documentmaxage";  break;
     case PropertyList::Grammar:    propName = L"grammarmaxage";   break;
     case PropertyList::Object:     propName = L"objectmaxage";    break;
     case PropertyList::Script:     propName = L"scriptmaxage";    break;
     }
 
     attr = toString(GetProperty(propName));
   }
 
   // (1.2) Process the value.
   if (!attr.empty()) {
     VXIint value = -1;
 
 #if defined(__GNUC__)
   // The G++ 2.95/3.0 implementation of basic_stringstream is faulty.
     VXIchar * temp;
     value = VXIint(wcstol(attr.c_str(), &temp, 10));
     if (*temp) value = -1;
 #else
     std::basic_stringstream<VXIchar> attrStream(attr);
     attrStream >> value;