public CoordinateSystem getCRSByID(String id) throws CRSConfigurationException {
   if (resolver == null) {
     throw new CRSConfigurationException("No resolver initialized, this may not be.");
   }
   CoordinateSystem result = null;
   if (id != null && !"".equals(id.trim())) {
     LOG.logDebug("Trying to load crs with id: " + id + " from cache.");
     if (LOG.isDebug()) {
       LOG.logDebug(cachedIdentifiables.keySet().toString());
     }
     if (cachedIdentifiables.containsKey(id)) {
       Identifiable r = cachedIdentifiables.get(id);
       LOG.logDebug("Found Identifiable: " + r.getIdAndName() + " from given id: " + id);
       if (!(r instanceof CoordinateSystem)) {
         LOG.logError(
             "Found Identifiable: "
                 + r.getIdAndName()
                 + " but it is not a coordinate system, your db is inconsistend return null.");
         r = null;
       }
       result = (CoordinateSystem) r;
     }
     if (result == null) {
       LOG.logDebug("No crs with id: " + id + " found in cache.");
       try {
         result = parseCoordinateSystem(resolver.getURIAsType(id));
       } catch (IOException e) {
         LOG.logDebug(e.getLocalizedMessage(), e);
         throw new CRSConfigurationException(e);
       }
       if (result != null) {
         GeographicCRS t = null;
         if (result.getType() == CoordinateSystem.COMPOUND_CRS) {
           if (((CompoundCRS) result).getUnderlyingCRS().getType()
               == CoordinateSystem.PROJECTED_CRS) {
             t = ((ProjectedCRS) ((CompoundCRS) result).getUnderlyingCRS()).getGeographicCRS();
           } else if (((CompoundCRS) result).getUnderlyingCRS().getType()
               == CoordinateSystem.GEOGRAPHIC_CRS) {
             t = (GeographicCRS) ((CompoundCRS) result).getUnderlyingCRS();
           } else {
             LOG.logWarning(
                 "Wgs84 Transformation lookup is currently only supported for GeographicCRS-chains.");
           }
         } else if (result.getType() == CoordinateSystem.PROJECTED_CRS) {
           t = ((ProjectedCRS) result).getGeographicCRS();
         } else if (result.getType() == CoordinateSystem.GEOGRAPHIC_CRS) {
           t = (GeographicCRS) result;
         } else {
           LOG.logWarning(
               "Wgs84 Transformation lookup is currently only supported for GeographicCRS-chains.");
         }
         if (t != null) {
           Helmert wgs84 = t.getGeodeticDatum().getWGS84Conversion();
           if (wgs84 == null) {
             wgs84 = resolver.getWGS84Transformation(t);
           }
           if (wgs84 != null) {
             if (wgs84.getSourceCRS() == null) {
               wgs84.setSourceCRS(t);
               addIdToCache(wgs84, true);
             }
             GeodeticDatum datum = result.getGeodeticDatum();
             if (datum != null) {
               datum.setToWGS84(wgs84);
               // update the cache as well
               addIdToCache(datum, true);
             }
           }
         }
       }
     }
   }
   if (result == null) {
     LOG.logDebug(
         "The id: "
             + id
             + " could not be mapped to a valid deegree-crs, currently projectedCRS, geographicCRS, compoundCRS and geocentricCRS are supported.");
   } else {
     /** Adding the used underlying crs's to the cache. */
     addIdToCache(result, false);
     if (result.getType() == CoordinateSystem.COMPOUND_CRS) {
       addIdToCache(((CompoundCRS) result).getUnderlyingCRS(), false);
       if (((CompoundCRS) result).getUnderlyingCRS().getType() == CoordinateSystem.PROJECTED_CRS) {
         addIdToCache(
             ((ProjectedCRS) ((CompoundCRS) result).getUnderlyingCRS()).getGeographicCRS(), false);
       }
     } else if (result.getType() == CoordinateSystem.PROJECTED_CRS) {
       addIdToCache(((ProjectedCRS) result).getGeographicCRS(), false);
     }
   }
   return result;
 }
  public Helmert getWGS84Transformation(GeographicCRS sourceCRS) {
    if (sourceCRS == null) {
      return null;
    }
    if (LOG.isDebug()) {
      LOG.logDebug(
          "Searching for wgs84 transformation for given sourceCRS: "
              + Arrays.toString(sourceCRS.getIdentifiers()));
    }
    Helmert result = cachedWGS84Transformations.get(sourceCRS);
    if (result == null) {
      Transformation parsedTransformation = getTransformation(sourceCRS, null);
      if (parsedTransformation instanceof Helmert) {
        LOG.logDebug(
            "Found an helmert transformation for sourceCRS: "
                + Arrays.toString(sourceCRS.getIdentifiers()));
        result = (Helmert) parsedTransformation;
      } else {
        if (parsedTransformation instanceof CRSTransformation) {
          CoordinateSystem target = ((CRSTransformation) parsedTransformation).getTargetCRS();
          GeographicCRS t = null;
          if (LOG.isDebug()) {
            LOG.logDebug(
                "Found crstransformation for sourceCRS: "
                    + Arrays.toString(sourceCRS.getIdentifiers())
                    + " and targetCRS: "
                    + Arrays.toString(target.getIdentifiers())
                    + " will now use the targetCRS to find a Helmert transformation.");
          }
          if (target.getType() == CoordinateSystem.COMPOUND_CRS) {
            if (((CompoundCRS) target).getUnderlyingCRS().getType()
                == CoordinateSystem.PROJECTED_CRS) {
              t = ((ProjectedCRS) ((CompoundCRS) target).getUnderlyingCRS()).getGeographicCRS();
            } else if (((CompoundCRS) target).getUnderlyingCRS().getType()
                == CoordinateSystem.GEOGRAPHIC_CRS) {
              t = (GeographicCRS) target;
            } else {
              LOG.logWarning(
                  "Wgs84 Transformation lookup is currently only supported for GeographicCRS-chains.");
            }
          } else if (target.getType() == CoordinateSystem.PROJECTED_CRS) {
            t = ((ProjectedCRS) target).getGeographicCRS();
          } else if (target.getType() == CoordinateSystem.GEOGRAPHIC_CRS) {
            t = (GeographicCRS) target;
          } else {
            LOG.logWarning(
                "Wgs84 Transformation lookup is currently only supported for GeographicCRS-chains.");
          }
          if (t != null) {
            if (LOG.isDebug()) {
              LOG.logDebug(
                  "Trying to resolve target to find a wgs84transformation for the 'targetCRS': "
                      + Arrays.toString(t.getIdentifiers()));
            }
            result = getWGS84Transformation(t);
          }
        } else {
          LOG.logWarning(
              "The transformation is not an instance of CRSTransformation nor a Helmert, ignoring it.");
        }
      }
    }

    if (result != null) {
      if (LOG.isDebug()) {
        LOG.logDebug(
            "For the given crs: "
                + sourceCRS.getIdentifier()
                + " following helmert transformation was found:\n"
                + result);
      }

      cachedWGS84Transformations.put(sourceCRS, result);
    } else {
      LOG.logInfo(
          "No helmert transformation found for the given crs: " + sourceCRS.getIdentifier());
    }
    return result;
  }