assertNull(form.seqNo);
        assertNull(form.primaryTerm);
        assertNull(form.crudMode);

        form.id = "test-id";
        form.seqNo = 1L;
        form.primaryTerm = 1L;
        form.crudMode = CrudMode.EDIT;

        assertEquals("test-id", form.id);
        assertEquals(1L, form.seqNo.longValue());
        assertEquals(1L, form.primaryTerm.longValue());

    }

    @Test
    public void test_parseJson_operationDocument() {
        final String json = "{\"_index\":\"fess_config.coordinator\",\"_id\":\"reindex\","
                + "\"found\":true,\"_seq_no\":5,\"_primary_term\":1," + "\"_source\":{\"type\":\"operation\",\"name\":\"reindex\","
                + "\"instanceId\":\"node1@host1\",\"hostname\":\"host1\","

                    return "_version";
                case FessConfig.INDEX_FIELD_seq_no:
                    return "_seq_no";
                case FessConfig.INDEX_FIELD_primary_term:
                    return "_primary_term";
                case FessConfig.INDEX_FIELD_LANG:
                    return "lang";
                case FessConfig.INDEX_FIELD_has_cache:
                    return "has_cache";

            final long primaryTerm = getLongValue(result, "_primary_term");
            try (CurlResponse deleteResponse = ComponentUtil.getCurlHelper() //
                    .delete("/" + getIndexName() + "/_doc/" + operationName //
                            + "?refresh=true&if_seq_no=" + seqNo + "&if_primary_term=" + primaryTerm) //
                    .execute()) {

        @Override
        public String getIndexFieldSeqNo() {
            return "_seq_no";
        }

        @Override
        public String getIndexFieldPrimaryTerm() {
            return "_primary_term";
        }

        @Override
        public String getResponseFieldContentTitle() {
            return "title";
        }

        @Override

index.field.id=_id
# Field name for version in the index.
index.field.version=_version
# Field name for sequence number in the index.
index.field.seq_no=_seq_no
# Field name for primary term in the index.
index.field.primary_term=_primary_term
# Field name for language in the index.
index.field.lang=lang
# Field name for cache status in the index.
index.field.has_cache=has_cache
# Field name for last modified date in the index.

    /** The key of the configuration. e.g. _seq_no */
    String INDEX_FIELD_seq_no = "index.field.seq_no";

    /** The key of the configuration. e.g. _primary_term */
    String INDEX_FIELD_primary_term = "index.field.primary_term";

    /** The key of the configuration. e.g. lang */
    String INDEX_FIELD_LANG = "index.field.lang";

    /** The key of the configuration. e.g. has_cache */

            esEntity.asDocMeta().seqNo(seqNo);
        }
        final Long primaryTerm = esEntity.asDocMeta().primaryTerm();
        if (primaryTerm != null && primaryTerm.longValue() != SequenceNumbers.UNASSIGNED_PRIMARY_TERM) {
            esEntity.asDocMeta().primaryTerm(primaryTerm);
        }
        return builder;
    }

        }

        public Long seqNo() {
            return seqNo;
        }

        public DocMeta primaryTerm(Long primaryTerm) {
            this.primaryTerm = primaryTerm;
            return this;
        }

        public Long primaryTerm() {
            return primaryTerm;
        }

        public DocMeta indexOption(RequestOptionCall<IndexRequestBuilder> builder) {

            esEntity.asDocMeta().seqNo(seqNo);
        }
        final Long primaryTerm = esEntity.asDocMeta().primaryTerm();
        if (primaryTerm != null && primaryTerm.longValue() != SequenceNumbers.UNASSIGNED_PRIMARY_TERM) {
            esEntity.asDocMeta().primaryTerm(primaryTerm);
        }
        return builder;
    }