/*
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   package org.galagosearch.core.retrieval.structured;
   
   import org.galagosearch.tupleflow.Parameters;
   
   /***
   *
   * @author trevor
   */
  public class FilteredCombinationIterator extends ScoreCombinationIterator {
      public FilteredCombinationIterator(Parameters parameters, ScoreIterator[] childIterators) {
          super(parameters, childIterators);
      }
  
      public int nextCandidate() {
          int candidate = 0;
  
          for (ScoreIterator iterator : iterators) {
              if (iterator.isDone()) {
                  return Integer.MAX_VALUE;
              }
              candidate = Math.max(candidate, iterator.nextCandidate());
          }
  
          return candidate;
      }
  
      public boolean hasMatch(int document) {
          for (ScoreIterator iterator : iterators) {
              if (iterator.isDone() || !iterator.hasMatch(document)) {
                  return false;
              }
          }
  
          return true;
      }
  
      public boolean isDone() {
          for (ScoreIterator iterator : iterators) {
              if (iterator.isDone()) {
                  return true;
              }
          }
  
          return false;
      }
  }