code: protected static Integer getMinHashInternal(final String cleanedXML, final Integer xor) {
          // now generate the minhashes
          String[] words = cleanedXML.replaceAll("\\p{Punct}", " ").split("\\s+");
  
          if (words.length == 0) {
              words = new String[] {""};
          }
  
          final List<String> shingles = new ArrayList<String>();
  
          if (words.length < SHINGLE_WORD_COUNT) {
              final StringBuilder shingle = new StringBuilder();
              for (int i = 0; i < words.length; ++i) {
                  if (shingle.length() != 0) {
                      shingle.append(" ");
                  }
                  shingle.append(words[i]);
              }
              final int hash =  shingle.toString().hashCode();
              if (xor != null) {
                  return hash ^ xor;
              } else {
                  return hash;
              }
          } else {
              for (int i = 0; i < words.length - SHINGLE_WORD_COUNT + 1; ++i) {
                  final StringBuilder shingle = new StringBuilder();
                  for (int j = i; j < words.length && j < i + SHINGLE_WORD_COUNT; ++j) {
                      if (shingle.length() != 0) {
                          shingle.append(" ");
                      }
                      shingle.append(words[j]);
                  }
                  shingles.add(shingle.toString());
              }
  
              Integer minHash = null;
              for (final String string : shingles) {
                  final int hash = string.hashCode();
                  final int finalHash = xor != null ? hash ^ xor : hash;
                  if (minHash == null || finalHash < minHash) {
                      minHash = finalHash;
                  }
              }
              return minHash;
          }
      }
docs: Returns the minimum hash of the sentences in an XML file.
  @param cleanedXML The cleaned xml to analyse
  @param xor the number to xor the hash against. Null if the standard hashCode() method should be used alone.
  @return The minimum hash