legacy/src/main/java/ucar/nc2/grib/GribVariableRenamer.java
List<String> matchNcepNames(GridDataset gds, String oldName) {
    List<String> result = new ArrayList<>();
    
    // look for exact match
    if (contains(gds, oldName))  {
      result.add(oldName); 
      return result;
    }
    
    Attribute att = gds.findGlobalAttributeIgnoreCase(CDM.FILE_FORMAT);
    boolean isGrib1 = (att != null) && att.getStringValue().startsWith("GRIB-1");
    boolean isGrib2 = (att != null) && att.getStringValue().startsWith("GRIB-2");
    HashMap<String, Renamer> map;
    if (isGrib1) {
      if (map1 == null) initMap1();
      map = map1;

    } else if (isGrib2) {
      if (map2 == null) initMap2();
      map = map2;

    } else {
      return result; // empty list
    }
    
    // look in our renamer map
    Renamer mbean = map.get(oldName);
    if (mbean != null && mbean.newName != null && contains(gds, mbean.newName))  {
      result.add(mbean.newName); // if its unique, then we are done
      return result;
    }

    // not unique - match against NCEP dataset
    if (mbean != null) {
      String dataset = extractDatasetFromLocation(gds.getLocation());
      for (VariableRenamerBean r : mbean.newVars) {
        if (r.getDatasetType().equals(dataset) && contains(gds, r.newName)) result.add(r.newName);
      }
      if (result.size() == 1) return result; // return if unique
    }

    // not unique, no unique match against dataset - check existence in the dataset
    result.clear();
    if (mbean != null) {
      for (VariableRenamerBean r : mbean.newVarsMap.values()) {
        if (contains(gds, r.newName)) result.add(r.newName);
      }
      if (result.size() > 0) return result;
    }
    
    // try to map oldName -> new prefix
    result.clear();
    String oldMunged = munge(oldName);
    for (GridDatatype grid : gds.getGrids()) {
      String newMunged = munge(grid.getShortName());
      if (newMunged.startsWith(oldMunged))
        result.add(grid.getShortName());
    }
    if (result.size() > 0) return result;

    // return empty list
    return result;
  }
List<String> matchNcepNames(GridDataset gds, String oldName) {
    List<String> result = new ArrayList<>();
    
    // look for exact match
    if (contains(gds, oldName))  {
      result.add(oldName); 
      return result;
    }
    
    Attribute att = gds.findGlobalAttributeIgnoreCase(CDM.FILE_FORMAT);
    boolean isGrib1 = (att != null) && att.getStringValue().startsWith("GRIB-1");
    boolean isGrib2 = (att != null) && att.getStringValue().startsWith("GRIB-2");
    HashMap<String, Renamer> map;
    if (isGrib1) {
      if (map1 == null) initMap1();
      map = map1;

    } else if (isGrib2) {
      if (map2 == null) initMap2();
      map = map2;

    } else {
      return result; // empty list
    }
    
    // look in our renamer map
    Renamer mbean = map.get(oldName);
    if (mbean != null && mbean.newName != null && contains(gds, mbean.newName))  {
      result.add(mbean.newName); // if its unique, then we are done
      return result;
    }

    // not unique - match against NCEP dataset
    if (mbean != null) {
      String dataset = extractDatasetFromLocation(gds.getLocation());
      for (VariableRenamerBean r : mbean.newVars) {
        if (r.getDatasetType().equals(dataset) && contains(gds, r.newName)) result.add(r.newName);
      }
      if (result.size() == 1) return result; // return if unique
    }

    // not unique, no unique match against dataset - check existence in the dataset
    result.clear();
    if (mbean != null) {
      for (VariableRenamerBean r : mbean.newVarsMap.values()) {
        if (contains(gds, r.newName)) result.add(r.newName);
      }
      if (result.size() > 0) return result;
    }
    
    // try to map oldName -> new prefix
    result.clear();
    String oldMunged = munge(oldName);
    for (GridDatatype grid : gds.getGrids()) {
      String newMunged = munge(grid.getShortName());
      if (newMunged.startsWith(oldMunged))
        result.add(grid.getShortName());
    }
    if (result.size() > 0) return result;

    // return empty list
    return result;
  }
List < String > matchNcepNames ( GridDataset gds , String oldName ) { List < String > result = new ArrayList <> ( ) ; // look for exact match
 if ( contains ( gds , oldName ) ) { result . add ( oldName ) ; return result ; } Attribute att = gds . findGlobalAttributeIgnoreCase ( CDM . FILE_FORMAT ) ; boolean isGrib1 = ( att != null ) && att . getStringValue ( ) . startsWith ( "GRIB-1" ) ; boolean isGrib2 = ( att != null ) && att . getStringValue ( ) . startsWith ( "GRIB-2" ) ; HashMap < String , Renamer > map ; if ( isGrib1 ) { if ( map1 == null ) initMap1 ( ) ; map = map1 ; } else if ( isGrib2 ) { if ( map2 == null ) initMap2 ( ) ; map = map2 ; } else { return result ; // empty list
 } // look in our renamer map
 Renamer mbean = map . get ( oldName ) ; if ( mbean != null && mbean . newName != null && contains ( gds , mbean . newName ) ) { result . add ( mbean . newName ) ; // if its unique, then we are done
 return result ; } // not unique - match against NCEP dataset
 if ( mbean != null ) { String dataset = extractDatasetFromLocation ( gds . getLocation ( ) ) ; for ( VariableRenamerBean r : mbean . newVars ) { if ( r . getDatasetType ( ) . equals ( dataset ) && contains ( gds , r . newName ) ) result . add ( r . newName ) ; } if ( result . size ( ) == 1 ) return result ; // return if unique
 } // not unique, no unique match against dataset - check existence in the dataset
 result . clear ( ) ; if ( mbean != null ) { for ( VariableRenamerBean r : mbean . newVarsMap . values ( ) ) { if ( contains ( gds , r . newName ) ) result . add ( r . newName ) ; } if ( result . size ( ) > 0 ) return result ; } // try to map oldName -> new prefix
 result . clear ( ) ; String oldMunged = munge ( oldName ) ; for ( GridDatatype grid : gds . getGrids ( ) ) { String newMunged = munge ( grid . getShortName ( ) ) ; if ( newMunged . startsWith ( oldMunged ) ) result . add ( grid . getShortName ( ) ) ; } if ( result . size ( ) > 0 ) return result ; // return empty list
 return result ; }
Look for possible matches of old (4.2) grib names in new (4.3) dataset.

@param gds check existence in this dataset. Must be from a GRIB1 or GRIB2 dataset.
@param oldName old name from 4.2 dataset
@return list of possible matches (as grid short name), each exists in the dataset
Look for possible matches of old ( 4 . 2 ) grib names in new ( 4 . 3 ) dataset .