ENH: better handling of user mistakes

Applications/FeatureExtraction/otbHaralickTextureExtraction.cxx

@@ -166,8 +166,7 @@ void DoExecute()
 
   if( GetParameterInt("channel") > nBComp )
     {
-    otbAppLogCRITICAL("Selected band is not available...");
-    return;
+    itkExceptionMacro(<< "The specified channel index is invalid.");
     }
 
   const std::string texType = GetParameterString("texture");

Applications/FeatureExtraction/otbRadiometricIndices.cxx

@@ -568,7 +568,7 @@ private:
 
       if( m_ImageList->Size() == 0 )
         {
-        otbAppLogCRITICAL("No indices selected...");
+        itkExceptionMacro(<< "No indices selected...");
         }
 
       m_Concatener->SetInput( m_ImageList );
@@ -578,7 +578,7 @@ private:
       }
     else
       {
-      otbAppLogINFO("Wrong Band Number...");
+      itkExceptionMacro(<< "At least one needed channel has an invalid index");
       }
 
   }

Applications/FeatureExtraction/otbSFSTextureExtraction.cxx

@@ -130,8 +130,7 @@ void DoExecute()
 
   if( GetParameterInt("channel") > nBComp )
     {
-    otbAppLogCRITICAL("Selected band is not available...");
-    return;
+    itkExceptionMacro(<< "The specified channel index is invalid.");
     }
 
   m_ExtractorFilter = ExtractorFilterType::New();