json_value.cpp.svn-base

这是基于jsoncpp项目写扩展功能

   return old;
#else
   Value *value = value_.map_->find( key );
   if (value){
      Value old(*value);
      value_.map_.remove( key );
      return old;
   } else {
      return null;
   }
#endif
}

Value
Value::removeMember( const std::string &key )
{
   return removeMember( key.c_str() );
}

# ifdef JSON_USE_CPPTL
Value 
Value::get( const CppTL::ConstString &key,
            const Value &defaultValue ) const
{
   return get( key.c_str(), defaultValue );
}
# endif

bool 
Value::isMember( const char *key ) const
{
   const Value *value = &((*this)[key]);
   return value != &null;
}


bool 
Value::isMember( const std::string &key ) const
{
   return isMember( key.c_str() );
}


# ifdef JSON_USE_CPPTL
bool 
Value::isMember( const CppTL::ConstString &key ) const
{
   return isMember( key.c_str() );
}
#endif

Value::Members 
Value::getMemberNames() const
{
   JSON_ASSERT( type_ == nullValue  ||  type_ == objectValue );
   if ( type_ == nullValue )
       return Value::Members();
   Members members;
   members.reserve( value_.map_->size() );
#ifndef JSON_VALUE_USE_INTERNAL_MAP
   ObjectValues::const_iterator it = value_.map_->begin();
   ObjectValues::const_iterator itEnd = value_.map_->end();
   for ( ; it != itEnd; ++it )
      members.push_back( std::string( (*it).first.c_str() ) );
#else
   ValueInternalMap::IteratorState it;
   ValueInternalMap::IteratorState itEnd;
   value_.map_->makeBeginIterator( it );
   value_.map_->makeEndIterator( itEnd );
   for ( ; !ValueInternalMap::equals( it, itEnd ); ValueInternalMap::increment(it) )
      members.push_back( std::string( ValueInternalMap::key( it ) ) );
#endif
   return members;
}
//
//# ifdef JSON_USE_CPPTL
//EnumMemberNames
//Value::enumMemberNames() const
//{
//   if ( type_ == objectValue )
//   {
//      return CppTL::Enum::any(  CppTL::Enum::transform(
//         CppTL::Enum::keys( *(value_.map_), CppTL::Type<const CZString &>() ),
//         MemberNamesTransform() ) );
//   }
//   return EnumMemberNames();
//}
//
//
//EnumValues 
//Value::enumValues() const
//{
//   if ( type_ == objectValue  ||  type_ == arrayValue )
//      return CppTL::Enum::anyValues( *(value_.map_), 
//                                     CppTL::Type<const Value &>() );
//   return EnumValues();
//}
//
//# endif


bool
Value::isNull() const
{
   return type_ == nullValue;
}


bool 
Value::isBool() const
{
   return type_ == booleanValue;
}


bool 
Value::isInt() const
{
   return type_ == intValue;
}


bool 
Value::isUInt() const
{
   return type_ == uintValue;
}


bool 
Value::isIntegral() const
{
   return type_ == intValue  
          ||  type_ == uintValue  
          ||  type_ == booleanValue;
}


bool 
Value::isDouble() const
{
   return type_ == realValue;
}


bool 
Value::isNumeric() const
{
   return isIntegral() || isDouble();
}


bool 
Value::isString() const
{
   return type_ == stringValue;
}


bool 
Value::isArray() const
{
   return type_ == nullValue  ||  type_ == arrayValue;
}


bool 
Value::isObject() const
{
   return type_ == nullValue  ||  type_ == objectValue;
}


void 
Value::setComment( const char *comment,
                   CommentPlacement placement )
{
   if ( !comments_ )
      comments_ = new CommentInfo[numberOfCommentPlacement];
   comments_[placement].setComment( comment );
}


void 
Value::setComment( const std::string &comment,
                   CommentPlacement placement )
{
   setComment( comment.c_str(), placement );
}


bool 
Value::hasComment( CommentPlacement placement ) const
{
   return comments_ != 0  &&  comments_[placement].comment_ != 0;
}

std::string 
Value::getComment( CommentPlacement placement ) const
{
   if ( hasComment(placement) )
      return comments_[placement].comment_;
   return "";
}


std::string 
Value::toStyledString() const
{
   StyledWriter writer;
   return writer.write( *this );
}


Value::const_iterator 
Value::begin() const
{
   switch ( type_ )
   {
#ifdef JSON_VALUE_USE_INTERNAL_MAP
   case arrayValue:
      if ( value_.array_ )
      {
         ValueInternalArray::IteratorState it;
         value_.array_->makeBeginIterator( it );
         return const_iterator( it );
      }
      break;
   case objectValue:
      if ( value_.map_ )
      {
         ValueInternalMap::IteratorState it;
         value_.map_->makeBeginIterator( it );
         return const_iterator( it );
      }
      break;
#else
   case arrayValue:
   case objectValue:
      if ( value_.map_ )
         return const_iterator( value_.map_->begin() );
      break;
#endif
   default:
      break;
   }
   return const_iterator();
}

Value::const_iterator 
Value::end() const
{
   switch ( type_ )
   {
#ifdef JSON_VALUE_USE_INTERNAL_MAP
   case arrayValue:
      if ( value_.array_ )
      {
         ValueInternalArray::IteratorState it;
         value_.array_->makeEndIterator( it );
         return const_iterator( it );
      }
      break;
   case objectValue:
      if ( value_.map_ )
      {
         ValueInternalMap::IteratorState it;
         value_.map_->makeEndIterator( it );
         return const_iterator( it );
      }
      break;
#else
   case arrayValue:
   case objectValue:
      if ( value_.map_ )
         return const_iterator( value_.map_->end() );
      break;
#endif
   default:
      break;
   }
   return const_iterator();
}


Value::iterator 
Value::begin()
{
   switch ( type_ )
   {
#ifdef JSON_VALUE_USE_INTERNAL_MAP
   case arrayValue:
      if ( value_.array_ )
      {
         ValueInternalArray::IteratorState it;
         value_.array_->makeBeginIterator( it );
         return iterator( it );
      }
      break;
   case objectValue:
      if ( value_.map_ )
      {
         ValueInternalMap::IteratorState it;
         value_.map_->makeBeginIterator( it );
         return iterator( it );
      }
      break;
#else
   case arrayValue:
   case objectValue:
      if ( value_.map_ )
         return iterator( value_.map_->begin() );
      break;
#endif
   default:
      break;
   }
   return iterator();
}

Value::iterator 
Value::end()
{
   switch ( type_ )
   {
#ifdef JSON_VALUE_USE_INTERNAL_MAP
   case arrayValue:
      if ( value_.array_ )
      {
         ValueInternalArray::IteratorState it;
         value_.array_->makeEndIterator( it );
         return iterator( it );
      }
      break;
   case objectValue:
      if ( value_.map_ )
      {
         ValueInternalMap::IteratorState it;
         value_.map_->makeEndIterator( it );
         return iterator( it );
      }
      break;
#else
   case arrayValue:
   case objectValue:
      if ( value_.map_ )
         return iterator( value_.map_->end() );
      break;
#endif
   default:
      break;
   }
   return iterator();
}


// class PathArgument
// //////////////////////////////////////////////////////////////////

PathArgument::PathArgument()
   : kind_( kindNone )
{
}


PathArgument::PathArgument( Value::UInt index )
   : index_( index )
   , kind_( kindIndex )
{
}


PathArgument::PathArgument( const char *key )
   : key_( key )
   , kind_( kindKey )
{
}


PathArgument::PathArgument( const std::string &key )
   : key_( key.c_str() )
   , kind_( kindKey )
{
}

// class Path
// //////////////////////////////////////////////////////////////////

Path::Path( const std::string &path,
            const PathArgument &a1,
            const PathArgument &a2,
            const PathArgument &a3,
            const PathArgument &a4,
            const PathArgument &a5 )
{
   InArgs in;
   in.push_back( &a1 );
   in.push_back( &a2 );
   in.push_back( &a3 );
   in.push_back( &a4 );
   in.push_back( &a5 );
   makePath( path, in );
}


void 
Path::makePath( const std::string &path,
                const InArgs &in )
{
   const char *current = path.c_str();
   const char *end = current + path.length();
   InArgs::const_iterator itInArg = in.begin();
   while ( current != end )
   {
      if ( *current == '[' )
      {
         ++current;
         if ( *current == '%' )
            addPathInArg( path, in, itInArg, PathArgument::kindIndex );
         else
         {
            Value::UInt index = 0;
            for ( ; current != end && *current >= '0'  &&  *current <= '9'; ++current )
               index = index * 10 + Value::UInt(*current - '0');
            args_.push_back( index );
         }
         if ( current == end  ||  *current++ != ']' )
            invalidPath( path, int(current - path.c_str()) );
      }
      else if ( *current == '%' )
      {
         addPathInArg( path, in, itInArg, PathArgument::kindKey );
         ++current;
      }
      else if ( *current == '.' )
      {
         ++current;
      }
      else
      {
         const char *beginName = current;
         while ( current != end  &&  !strchr( "[.", *current ) )
            ++current;
         args_.push_back( std::string( beginName, current ) );
      }
   }
}


void 
Path::addPathInArg( const std::string &path, 
                    const InArgs &in, 
                    InArgs::const_iterator &itInArg, 
                    PathArgument::Kind kind )
{
   if ( itInArg == in.end() )
   {
      // Error: missing argument %d
   }
   else if ( (*itInArg)->kind_ != kind )
   {
      // Error: bad argument type
   }
   else
   {
      args_.push_back( **itInArg );
   }
}


void 
Path::invalidPath( const std::string &path, 
                   int location )
{
   // Error: invalid path.
}


const Value &
Path::resolve( const Value &root ) const
{
   const Value *node = &root;
   for ( Args::const_iterator it = args_.begin(); it != args_.end(); ++it )
   {
      const PathArgument &arg = *it;
      if ( arg.kind_ == PathArgument::kindIndex )
      {
         if ( !node->isArray()  ||  node->isValidIndex( arg.index_ ) )
         {
            // Error: unable to resolve path (array value expected at position...
         }
         node = &((*node)[arg.index_]);
      }
      else if ( arg.kind_ == PathArgument::kindKey )
      {
         if ( !node->isObject() )
         {
            // Error: unable to resolve path (object value expected at position...)
         }
         node = &((*node)[arg.key_]);
         if ( node == &Value::null )
         {
            // Error: unable to resolve path (object has no member named '' at position...)
         }
      }
   }
   return *node;
}


Value 
Path::resolve( const Value &root, 
               const Value &defaultValue ) const
{
   const Value *node = &root;
   for ( Args::const_iterator it = args_.begin(); it != args_.end(); ++it )
   {
      const PathArgument &arg = *it;
      if ( arg.kind_ == PathArgument::kindIndex )
      {
         if ( !node->isArray()  ||  node->isValidIndex( arg.index_ ) )
            return defaultValue;
         node = &((*node)[arg.index_]);
      }
      else if ( arg.kind_ == PathArgument::kindKey )
      {
         if ( !node->isObject() )
            return defaultValue;
         node = &((*node)[arg.key_]);
         if ( node == &Value::null )
            return defaultValue;
      }
   }
   return *node;
}


Value &
Path::make( Value &root ) const
{
   Value *node = &root;
   for ( Args::const_iterator it = args_.begin(); it != args_.end(); ++it )
   {
      const PathArgument &arg = *it;
      if ( arg.kind_ == PathArgument::kindIndex )
      {
         if ( !node->isArray() )
         {
            // Error: node is not an array at position ...
         }
         node = &((*node)[arg.index_]);
      }
      else if ( arg.kind_ == PathArgument::kindKey )
      {
         if ( !node->isObject() )
         {
            // Error: node is not an object at position...
         }
         node = &((*node)[arg.key_]);
      }
   }
   return *node;
}


} // namespace Json