/** Maximum number of rows to extract. */
    protected int maxRows = 10000;

    /** Delimiter character for CSV parsing. */
    protected Character delimiter = null;

    /** Whether the first row contains headers. */
    protected boolean hasHeader = true;

    /** Whether to auto-detect the delimiter. */
    protected boolean autoDetectDelimiter = true;

    /** Whether to extract column names as metadata. */

                buf.append(",\"data\":[");

                boolean first = true;
                for (final SuggestItem item : suggestResponse.getItems()) {
                    if (!first) {
                        buf.append(',');
                    }
                    first = false;

        // Test boundary characters for ranges
        assertTrue(CharUtil.isUrlChar('a')); // first lowercase
        assertTrue(CharUtil.isUrlChar('z')); // last lowercase
        assertTrue(CharUtil.isUrlChar('A')); // first uppercase
        assertTrue(CharUtil.isUrlChar('Z')); // last uppercase
        assertTrue(CharUtil.isUrlChar('0')); // first digit
        assertTrue(CharUtil.isUrlChar('9')); // last digit

        assertEquals("test-session", retrieved.getSessionId());
        assertEquals("http://example.com", retrieved.getUrl());
    }

    public void test_urlQueue_setNull() {
        // Set a UrlQueue first
        UrlQueue<?> urlQueue = createMockUrlQueue("test", "http://test.com");
        CrawlingParameterUtil.setUrlQueue(urlQueue);
        assertNotNull(CrawlingParameterUtil.getUrlQueue());

        // Set to null

        list.add("first");
        list.add(null);
        list.add("third");
        final byte[] binary = SerializeUtil.fromObjectToBinary(list);
        @SuppressWarnings("unchecked")
        final List<String> result = (List<String>) SerializeUtil.fromBinaryToObject(binary);
        assertEquals(3, result.size());
        assertEquals("first", result.get(0));
        assertNull(result.get(1));

        final String index1 = "test-multi-index-001";
        final String index2 = "test-multi-index-002";
        final String aliasName = "test-multi-alias";

        // Create first index with alias
        client.admin().indices().prepareCreate(index1).addAlias(new Alias(aliasName)).execute().actionGet();

        // Create second index and add to same alias

            return false;
        }

        /**
         * Compares two times.
         *
         * @param h1 the first hour
         * @param m1 the first minute
         * @param h2 the second hour
         * @param m2 the second minute
         * @return positive if first time is earlier, 0 if equal, negative if later
         */

        ingesters = newIngesters;
    }

    /**
     * Returns the array of registered ingesters sorted by priority.
     * The returned array contains all ingesters in priority order
     * (lower priority numbers first).
     *
     * @return the sorted array of ingesters
     */
    public Ingester[] getIngesters() {
        return ingesters;
    }

            synchronized (lastTime) {
                final long lastValue = lastTime.get();
                if (lastValue == 0) {
                    // First access to this host - no delay needed
                    // Set current time to allow proper delay for next access
                    lastTime.set(SystemUtil.currentTimeMillis());
                    return;

## Development Commands

### Setup
```bash
# Download OpenSearch plugins (required before first build)
mvn antrun:run

# Generate DBFlute source code (when schema changes)
mvn dbflute:download  # One-time setup
mvn dbflute:freegen
mvn license:format
```

### Build
```bash
# Standard build