ossimWkt Class Reference

Utility/support data class to parse WKT text string to an ossimKeywordlist. More...

#include <ossimWkt.h>

Public Member Functions
	ossimWkt ()
	default constructor More...
	~ossimWkt ()
	destructor More...
bool	parse (const std::string &wkt)
	Parses string to keyword list. More...
const ossimKeywordlist &	getKwl () const

Private Member Functions
bool	parseWktGroup (std::istringstream &is, ossimKeywordlist &kwl)
bool	parseObject (std::istringstream &is, const std::string &prefix, const std::string &object, ossimKeywordlist &kwl)
bool	parseName (std::istringstream &is, const std::string &prefix, const std::string &object, ossimKeywordlist &kwl)
bool	parseParam (std::istringstream &is, const std::string &prefix, const std::string &object, ossim_uint32 &objectIndex, ossim_uint32 &paramIndex, ossimKeywordlist &kwl)

Private Attributes
ossimKeywordlist	m_kwl

Detailed Description

Utility/support data class to parse WKT text string to an ossimKeywordlist.

Example keyword list( WKT string dependent ):

PROJCS.AUTHORITY.name: EPSG PROJCS.AUTHORITY.param0: "32641" PROJCS.GEOGCS.AUTHORITY.name: EPSG PROJCS.GEOGCS.AUTHORITY.param0: "4326" PROJCS.GEOGCS.DATUM.AUTHORITY.name: EPSG PROJCS.GEOGCS.DATUM.AUTHORITY.param0: "6326" PROJCS.GEOGCS.DATUM.SPHEROID.AUTHORITY.name: EPSG PROJCS.GEOGCS.DATUM.SPHEROID.AUTHORITY.param0: "7030" PROJCS.GEOGCS.DATUM.SPHEROID.name: WGS 84 PROJCS.GEOGCS.DATUM.SPHEROID.param0: 6378137 PROJCS.GEOGCS.DATUM.SPHEROID.param1: 298.2572235630016 PROJCS.GEOGCS.DATUM.name: WGS_1984 PROJCS.GEOGCS.PRIMEM.name: Greenwich PROJCS.GEOGCS.PRIMEM.param0: 0 PROJCS.GEOGCS.UNIT.name: degree PROJCS.GEOGCS.UNIT.param0: 0.0174532925199433 PROJCS.GEOGCS.name: WGS 84 PROJCS.PARAMETER0.name: latitude_of_origin PROJCS.PARAMETER0.param0: 0 PROJCS.PARAMETER1.name: central_meridian PROJCS.PARAMETER1.param0: 63 PROJCS.PARAMETER2.name: scale_factor PROJCS.PARAMETER2.param0: 0.9996 PROJCS.PARAMETER3.name: false_easting PROJCS.PARAMETER3.param0: 500000 PROJCS.PARAMETER4.name: false_northing PROJCS.PARAMETER4.param0: 0 PROJCS.PROJECTION.name: Transverse_Mercator PROJCS.UNIT.AUTHORITY.name: EPSG PROJCS.UNIT.AUTHORITY.param0: "9001" PROJCS.UNIT.name: metre PROJCS.UNIT.param0: 1 PROJCS.name: WGS 84 / UTM zone 41N

Definition at line 68 of file ossimWkt.h.

Constructor & Destructor Documentation

ossimWkt()

ossimWkt::ossimWkt

(

)

default constructor

Definition at line 43 of file ossimWkt.cpp.

   : m_kwl()
{
}

~ossimWkt()

ossimWkt::~ossimWkt

(

)

destructor

Definition at line 48 of file ossimWkt.cpp.

{
}

Member Function Documentation

getKwl()

const ossimKeywordlist & ossimWkt::getKwl

(

)

const

Returns

Refeerence to keyword list.

Definition at line 63 of file ossimWkt.cpp.

References m_kwl.

Referenced by ossimWktProjectionFactory::createProjection(), and ossimMrSidReader::getGeoProjection().

{
   return m_kwl;
}

parse()

bool ossimWkt::parse

(

const std::string &

wkt

)

Parses string to keyword list.

Parameters

wkt	String to parse.

Definition at line 52 of file ossimWkt.cpp.

References m_kwl, and parseWktGroup().

Referenced by ossimWktProjectionFactory::createProjection(), and ossimMrSidReader::getGeoProjection().

{
   bool result = false;
   if ( wkt.size() )
   {
      std::istringstream is( wkt );
      result = parseWktGroup( is, m_kwl );
   }
   return result;
}

parseName()

bool ossimWkt::parseName ( std::istringstream &  is, const std::string &  prefix, const std::string &  object, ossimKeywordlist &  kwl  )

private

Definition at line 140 of file ossimWkt.cpp.

References ossimKeywordlist::addPair().

Referenced by parseObject().

{
   bool result = false;
   char c;
   std::string name;

   // Find the first quote:
   while ( is.good() )
   {
      is.get(c);
      if ( is.good() )
      {  
         if ( c == '"' )
         {
            break;
         }
      }
   }

   // Get the name:
   while ( is.good() )
   {
      is.get(c);
      if ( is.good() )
      {  
         if ( c != '"' )
         {
            name.push_back(c);
         }
         else
         {
            break; // End quote:
         }
      }
   }

   if ( name.size() )
   {
      // Add to keyword list.
      std::string key;
      if ( prefix.size() )
      {
         key += prefix;
      }
      key += object;
      key += ".name";
      kwl.addPair( key, name );
      result = true;
   }
   
   return result;
}

parseObject()

bool ossimWkt::parseObject ( std::istringstream &  is, const std::string &  prefix, const std::string &  object, ossimKeywordlist &  kwl  )

private

Definition at line 105 of file ossimWkt.cpp.

References parseName(), and parseParam().

Referenced by parseParam(), and parseWktGroup().

{
   bool result = false;

   result = parseName( is, prefix, object, kwl );

   if ( result && is.good() )
   {
      char c;
      ossim_uint32 myObjectIndex = 0;
      ossim_uint32 paramIndex = 0;
      while ( is.good() )
      {
         is.get(c);
         if ( is.good() )
         {  
            if ( c == ',' )
            {
               parseParam( is, prefix, object, myObjectIndex, paramIndex, kwl );
            }
            else if ( (c == ']') || (c == ')') )
            {
               break; // End of object.
            }
         }
      }
      
   }
   
   return result;
}

parseParam()

bool ossimWkt::parseParam ( std::istringstream &  is, const std::string &  prefix, const std::string &  object, ossim_uint32 &  objectIndex, ossim_uint32 &  paramIndex, ossimKeywordlist &  kwl  )

private

Definition at line 196 of file ossimWkt.cpp.

References ossimKeywordlist::addPair(), parseObject(), ossimString::string(), and ossimString::toString().

Referenced by parseObject().

{
   bool result = false;
   char c;
   std::string name;

   // Get the name:
   while ( is.good() )
   {
      int i = is.peek(); // Don't gobble the trailing comma or bracket.
      
      if ( (i == ',') || (i == ']') || (i == ')') )
      {
         // End of param.
         if ( name.size() )
         {
            // Add to keyword list.
            std::string key;
            if ( prefix.size() )
            {
               key += prefix;
            }
            key += object;
            key += ".param";
            key += ossimString::toString(paramIndex).string();
            kwl.addPair( key, name );
            name = "";
            ++paramIndex;
            result = true;
         }
         
         break; // Next param or at end of object.
      }

      is.get(c);
      if ( is.good() )
      {
         // Look nexted object.
         if ( (c == '[') || (c == '(') )
         {
            std::string myPrefix;
            if ( prefix.size() )
            {
               myPrefix += prefix;
            }
            
            myPrefix += object;

            myPrefix += ".";

            //---
            // Special hack for duplicated keyword "PARAMETER"
            //---
            if ( name == "PARAMETER" )
            {
               name += ossimString::toString(objectIndex).string();
               ++objectIndex;
            }

            result = parseObject( is, myPrefix, name, kwl );

            name = "";
         }
         else
         {
            name.push_back(c);
         }
      }
   }
   
   return result;
}

parseWktGroup()

bool ossimWkt::parseWktGroup ( std::istringstream &  is, ossimKeywordlist &  kwl  )

private

Definition at line 68 of file ossimWkt.cpp.

References parseObject().

Referenced by parse().

{
   bool result = false;

   if ( is.good() )
   {
      char c;

      // Get the wkt group name up to '[', e.g. "PROJCS[".
      std::string prefix = "";      
      std::string object;
      // std::string v;
      while ( is.good() )
      {
         is.get(c);
         if ( is.good() )
         {
            // Look for parens or square brackets.
            if ( (c != '[') && (c != '(') )
            {
               object.push_back(c);
            }
            else
            {
               result = parseObject( is, prefix, object, kwl );
            }
         }
         else
         {
            break;
         }
      }
   }
   
   return result;
}

Member Data Documentation

m_kwl

ossimKeywordlist ossimWkt::m_kwl

private

Definition at line 107 of file ossimWkt.h.

Referenced by getKwl(), and parse().

---

The documentation for this class was generated from the following files:

• ossimWkt.h
• ossimWkt.cpp