String sessionId = "test-session-024";
        urlFilter.init(sessionId);

        // Test empty pattern
        urlFilter.addInclude("");
        urlFilter.addExclude("");

        // Test single character pattern
        urlFilter.addInclude(".");
        urlFilter.addExclude("*");

        // Test patterns with only special characters
        urlFilter.addInclude("^$");
        urlFilter.addExclude(".*");

                .getTotalHits()
                .value() > 0);

        // Verify pattern can be retrieved
        final List<Pattern> patterns = urlFilterService.getIncludeUrlPatternList(sessionId);
        assertEquals(1, patterns.size());
        assertTrue(patterns.get(0).matcher("http://example.com/page1").matches());
        assertFalse(patterns.get(0).matcher("http://other.com/page1").matches());

        private final int priorityLength;

        /**
         * Constructs a new PathPattern from the given robots.txt path pattern.
         * @param pattern the path pattern string from robots.txt (may contain * and $)
         */
        public PathPattern(final String pattern) {
            this.pattern = pattern;

					symmetry = uint64(len(p.Seq))%ss == 0
				} else {
					symmetry = ss%uint64(len(p.Seq)) == 0
				}
			}
		}
		// With no arg patterns, it is expected that user knows
		// the right symmetry, so either ellipses patterns are
		// provided (recommended) or no ellipses patterns.
		if _, ok := newSetCounts[ss]; !ok && (symmetry || argPatterns == nil) {
			newSetCounts[ss] = struct{}{}
		}
	}

	setCounts = []uint64{}

    }

    /**
     * Converts a GSA URL pattern into a regular expression pattern suitable for Fess.
     * Handles various GSA pattern formats including regexp, contains, and URL-based patterns.
     *
     * @param s the input GSA pattern string
     * @return a regular expression pattern string, or empty string for comments/invalid patterns
     */
    protected String getFilterPath(final String s) {

**Flow**: Poll URL → Validate → Get client → Delay → Check last-modified → Execute → Process → Extract children → Queue children → Delay

### CrawlerClientFactory

Pattern-based client selection using `LinkedHashMap<Pattern, CrawlerClient>`.

**Standard Patterns**:
```java
"^https?://.*"     → httpClient
"^file:.*"         → fileSystemClient
"^ftp://.*"        → ftpClient
"^smb://.*"        → smbClient

    }

    @Test
    @DisplayName("Test with wildcard patterns")
    void testWildcardPatterns() {
        request = new Smb2QueryDirectoryRequest(mockConfig);

        // Test various wildcard patterns
        String[] patterns = { "*", "*.txt", "test*.*", "?test?.doc" };

        for (String pattern : patterns) {
            request.setFileName(pattern);

            byte[] buffer = new byte[1024];

   - Convert URL patterns to Fess regex patterns
   - Set up LabelType (access control labels) if defined

**Step 3: Verify Imported Configurations**

After import, verify:
- **Crawler > Web**: Check web crawling configurations
- **Crawler > File**: Check file crawling configurations (SMB, FTP)
- **System > General**: Verify URL patterns and filters

**GSA Configuration Mapping**

		t.Run("", func(t *testing.T) {
			argPatterns := make([]ellipses.ArgPattern, len(testCase.args))
			for i, arg := range testCase.args {
				patterns, err := ellipses.FindEllipsesPatterns(arg)
				if err != nil {
					t.Fatalf("Unexpected failure %s", err)
				}
				argPatterns[i] = patterns
			}

			gotIndexes, err := getSetIndexes(testCase.args, testCase.totalSizes, testCase.envOverride, argPatterns)

### Key Architectural Patterns
- **Factory Pattern** - `BeanDescFactory` for creating bean descriptors, `ParameterizedClassDescFactory` for generic type handling
- **Builder Pattern** - `CopyOptions` for configuring bean copying operations with fluent API
- **Adapter Pattern** - Logging adapters (`JclLoggerAdapter`, `JulLoggerAdapter`) for different logging frameworks