How to use

getAttributeNames

method

in

org.geotools.styling.StyleAttributeExtractor

private String[] getDynamicProperties(List<Rule> dynamicRules) {
  StyleAttributeExtractor extractor = new StyleAttributeExtractor();
  for (Rule rule : dynamicRules) {
    rule.accept(extractor);
  }
  return extractor.getAttributeNames();
}

String[] ftsAttributes = sae.getAttributeNames();

/**
 * Checks to make sure that the style passed in can process the FeatureType.
 * 
 * @param style
 *            The style to check
 * @param fType
 *            The source requested.
 * 
 * @throws WmsException
 *             DOCUMENT ME!
 */
private void checkStyle(Style style, SimpleFeatureType fType) throws WmsException {
  StyleAttributeExtractor sae = new StyleAttributeExtractor();
  sae.visit(style);
  String[] styleAttributes = sae.getAttributeNames();
  String attName;
  final int length = styleAttributes.length;
  for (int i = 0; i < length; i++) {
    attName = styleAttributes[i];
    if (fType.getDescriptor(attName) == null) {
      throw new WmsException(
          "The requested Style can not be used with "
              + "this featureType.  The style specifies an attribute of "
              + attName
              + " and the featureType definition is: "
              + fType);
    }
  }
}

Filter filter = query.getFilter();
filter.accept(extractor, null);
String[] filterAttnames = extractor.getAttributeNames();

String[] styleAttributes = sae.getAttributeNames();