query.additional.facet.fields=
query.additional.sort.fields=
query.additional.analyzed.fields=
query.additional.not.analyzed.fields=
query.gsa.response.fields=UE,U,T,RK,S,LANG
query.gsa.default.lang=en
query.gsa.default.sort=
query.gsa.meta.prefix=MT_
query.gsa.index.field.charset=charset
query.gsa.index.field.content_type.=content_type
query.collapse.max.concurrent.group.results=4
query.collapse.inner.hits.name=similar_docs

        final int fileType;
        if (fileName.startsWith("system") && fileName.endsWith(".properties")) {
            fileType = 1;
        } else if (fileName.startsWith("gsa") && fileName.endsWith(".xml")) {
            fileType = 2;
        } else if (fileName.endsWith(".bulk")) {
            fileType = 3;
        } else if (fileName.startsWith("fess") && fileName.endsWith(".json")) {

    String QUERY_GSA_RESPONSE_FIELDS = "query.gsa.response.fields";

    /** The key of the configuration. e.g. en */
    String QUERY_GSA_DEFAULT_LANG = "query.gsa.default.lang";

    /** The key of the configuration. e.g.  */
    String QUERY_GSA_DEFAULT_SORT = "query.gsa.default.sort";

    /** The key of the configuration. e.g. MT_ */
    String QUERY_GSA_META_PREFIX = "query.gsa.meta.prefix";