* query field properties and capabilities.
 */
public class QueryFieldConfig {

    /**
     * Default constructor.
     */
    public QueryFieldConfig() {
        // Default constructor
    }

    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(QueryFieldConfig.class);

    /** Field name for document score in search results */

            }
        };

        ComponentUtil.setFessConfig(fessConfig);

        // Initialize QueryFieldConfig
        QueryFieldConfig queryFieldConfig = new QueryFieldConfig();
        queryFieldConfig.init();
        ComponentUtil.register(queryFieldConfig, "queryFieldConfig");

        // Initialize QueryParser
        QueryParser queryParser = new QueryParser();
        queryParser.init();

        // Setup FessConfig with proper initialization
        setupBaseFessConfig();

        // Initialize QueryFieldConfig
        QueryFieldConfig queryFieldConfig = new QueryFieldConfig();
        queryFieldConfig.init();
        ComponentUtil.register(queryFieldConfig, "queryFieldConfig");

        // Initialize QueryParser
        QueryParser queryParser = new QueryParser();
        queryParser.init();

    private PrefixQueryCommand queryCommand;
    private QueryFieldConfig queryFieldConfig;

    @Override
    protected void setUpChild() throws Exception {
        // Get the queryProcessor and queryFieldConfig that were registered in parent class
        queryProcessor = ComponentUtil.getComponent("queryProcessor");
        queryFieldConfig = ComponentUtil.getComponent("queryFieldConfig");

        // Initialize and register PrefixQueryCommand

        assertTrue(queryFieldConfig.isSortField("score"));
        assertTrue(queryFieldConfig.isSortField("created"));
        assertTrue(queryFieldConfig.isSortField("modified"));
        assertTrue(queryFieldConfig.isSortField("title"));

        // Test invalid sort fields
        assertFalse(queryFieldConfig.isSortField("invalid"));
        assertFalse(queryFieldConfig.isSortField(""));
        assertFalse(queryFieldConfig.isSortField(null));

    public void test_getResponseFields() {
        // Setup mock QueryFieldConfig
        QueryFieldConfig queryFieldConfig = new QueryFieldConfig() {
            @Override
            public String[] getResponseFields() {
                return new String[] { "field1", "field2", "field3" };
            }
        };
        ComponentUtil.register(queryFieldConfig, "queryFieldConfig");

        // Verify array is set
        assertNotNull(queryFieldConfig.facetFields);
        assertSame(fields, queryFieldConfig.facetFields);
        assertEquals(3, queryFieldConfig.facetFields.length);

        // Verify Set is created and populated
        assertNotNull(queryFieldConfig.facetFieldSet);
        assertEquals(3, queryFieldConfig.facetFieldSet.size());

        super.setUp(testInfo);

        // Setup FessConfig
        setupMockFessConfig();

        // Initialize QueryFieldConfig
        QueryFieldConfig queryFieldConfig = new QueryFieldConfig();
        queryFieldConfig.init();
        ComponentUtil.register(queryFieldConfig, "queryFieldConfig");

        // Initialize QueryParser
        QueryParser queryParser = new QueryParser();
        queryParser.init();

    private QueryFieldConfig queryFieldConfig;

    @Override
    protected void setUpChild() throws Exception {
        queryCommand = new TestQueryCommand();
        queryFieldConfig = ComponentUtil.getQueryFieldConfig();

        // Set up search fields
        String[] searchFields = { "title", "content", "url", "host", "filetype" };
        queryFieldConfig.setSearchFields(searchFields);
    }

     * @return The appropriate sort builder for the field.
     */
    protected SortBuilder<?> createFieldSortBuilder(final String field, final SortOrder order) {
        if (QueryFieldConfig.SCORE_FIELD.equals(field) || QueryFieldConfig.DOC_SCORE_FIELD.equals(field)) {
            return SortBuilders.scoreSort().order(order);
        }
        return SortBuilders.fieldSort(field).order(order);
    }

    /**