constraintEncoders.put(IndexConstraintTypeEnum.WILDCARD, new WildcardEncoder(indexValueFactory));
constraintEncoders.put(IndexConstraintTypeEnum.REGEX, new RegexEncoder(indexValueFactory));
constraintEncoders.put(IndexConstraintTypeEnum.GE, new GeEncoder(indexValueFactory));
constraintEncoders.put(IndexConstraintTypeEnum.LE, new LeEncoder(indexValueFactory));
constraintEncoders.put(IndexConstraintTypeEnum.GT, new GtEncoder(indexValueFactory));
constraintEncoders.put(IndexConstraintTypeEnum.LT, new LtEncoder(indexValueFactory));
this.mltFieldEncoders = Arrays.asList(langEncoder,datatypeEncoder,fieldEncoder);
}