ENH: add range band to otbExtendedFilenameToWriterOptions

Modules/IO/ExtendedFilename/include/otbExtendedFilenameToWriterOptions.h

@@ -69,6 +69,7 @@ public:
     std::pair<bool,  std::string>                streamingSizeMode;
     std::pair<bool,  double>                     streamingSizeValue;
     std::pair<bool,  std::string>                box;
+    std::pair< bool, std::string>                bandRange;
     std::vector<std::string>                     optionList;
   };
 
@@ -92,6 +93,16 @@ public:
   bool BoxIsSet() const;
   std::string GetBox() const;
 
+  /** Test if band range extended filename is set */
+  bool BandRangeIsSet () const;
+  /**  Decode the string into a list of GenericBandRange, band indexes are
+   *  1-based. */
+  std::vector<ExtendedFilenameHelper::GenericBandRange> GetBandRange() const;
+
+  /** Resolve the list of band ranges into real band indexes, according to
+   *  a total number of bands in the image. Note that the output indexes are
+   *  zero-based (0 is the first component) */
+  bool ResolveBandRange(const unsigned int &nbBands, std::vector<unsigned int> &output) const;
 
 protected:
   ExtendedFilenameToWriterOptions();

Modules/IO/ExtendedFilename/src/otbExtendedFilenameToWriterOptions.cxx

@@ -40,12 +40,16 @@ ExtendedFilenameToWriterOptions
   m_Options.streamingSizeMode.first   = false;
   m_Options.streamingSizeValue.first  = false;
 
+  m_Options.bandRange.first = false;
+  m_Options.bandRange.second = "";
+
   m_Options.optionList.push_back("writegeom");
   m_Options.optionList.push_back("writerpctags");
   m_Options.optionList.push_back("streaming:type");
   m_Options.optionList.push_back("streaming:sizemode");
   m_Options.optionList.push_back("streaming:sizevalue");
   m_Options.optionList.push_back("box");
+  m_Options.optionList.push_back("bands");
 }
 
 void
@@ -155,6 +159,22 @@ ExtendedFilenameToWriterOptions
       }
     }
 
+  if (!map["bands"].empty())
+    {
+    // Basic check on bandRange (using regex)
+    itksys::RegularExpression reg;
+    reg.compile("^((\\-?[0-9]+)?(:(\\-?[0-9]+)?)?)(,(\\-?[0-9]+)?(:(\\-?[0-9]+)?)?)*$");
+    if (reg.find(map["bands"]))
+      {
+      m_Options.bandRange.first = true;
+      m_Options.bandRange.second = map["bands"];
+      }
+    else
+      {
+      itkWarningMacro("Unkwown value "<<map["bands"]<<" for band range. Expect a list of tokens separated with comma (each token being a single band index or a range in the form x:y)");
+      }
+    }
+
   //Option Checking
   for ( it=map.begin(); it != map.end(); it++ )
     {
@@ -286,5 +306,25 @@ ExtendedFilenameToWriterOptions
   return m_Options.box.second;
 }
 
+bool
+ExtendedFilenameToWriterOptions
+::BandRangeIsSet () const
+{
+  return m_Options.bandRange.first;
+}
+
+std::vector<ExtendedFilenameHelper::GenericBandRange>
+ExtendedFilenameToWriterOptions
+::GetBandRange () const
+{
+  return Superclass::GetBandRange(m_Options.bandRange.second);
+}
+
+bool
+ExtendedFilenameToWriterOptions
+::ResolveBandRange(const unsigned int &nbBands, std::vector<unsigned int> &output) const
+{
+    return Superclass::ResolveBandRange(nbBands, output, m_Options.bandRange.second);
+}
 
 } // end namespace otb