package eu.fbk.dkm.pikes.resources;
   
   import com.google.common.collect.ImmutableSet;
   import com.google.common.collect.Sets;
   
   import java.util.Set;
   
   public final class VerbNet {
   
      public static Set<String> getSuperClasses(final boolean recursive, final String classID) {
          final int index = classID.lastIndexOf('-');
          if (index <= 0 || !Character.isDigit(classID.charAt(index - 1))) {
              return ImmutableSet.of();
          } else {
              final String parent = classID.substring(0, index);
              final Set<String> result = Sets.newHashSet(parent);
              if (recursive) {
                  result.addAll(getSuperClasses(true, parent));
              }
              return result;
          }
      }
  
  }