Scala implementation of lucene escaping, useful when querying elasticsearch

LuceneEscape.scala

// https://github.com/apache/lucene-solr/blob/master/lucene/queryparser/src/java/org/apache/lucene/queryparser/classic/QueryParserBase.java#L973
def luceneEscape(s: String): String  = {
  // use string builder, as it's probably more efficient
  val sb = new StringBuilder
  s.foreach {
    case char @ ('\\' | '+' | '-' | '!' | '(' | ')' | ':' | '^' | '[' | ']' | '\"' | '{' | '}' | '~' | '*' | '?' | '|' | '&' | '/') =>
      sb.append('\\').append(char)
    case other => sb.append(other)
  }
  sb.result()
}