emptyGenerator = new EmptyGenerator();

        // Test adding conditions - this should work without container
        emptyGenerator.addCondition("field1", "pattern1");
        emptyGenerator.addCondition("field1", "pattern2");
        emptyGenerator.addCondition("field2", "pattern.*");

        // We can't test isTarget properly without container,
        // but we can verify conditions are added
        assertNotNull(emptyGenerator);

        // Pattern with single backslash (14 chars): should match
        String singleBackslash = "image/svg" + "\\" + "+xml";
        assertEquals("Single backslash pattern should be 14 chars", 14, singleBackslash.length());
        assertTrue(svgMimetype.matches(singleBackslash));

        // Pattern with double backslash (15 chars): should NOT match
        String doubleBackslash = "image/svg" + "\\\\" + "+xml";

            return false;
        }

        Pattern pattern = (Pattern) propMap.get(USER_CODE_PATTERN);
        if (pattern == null) {
            pattern = Pattern.compile(getUserCodePattern());
            propMap.put(USER_CODE_PATTERN, pattern);
        }
        return pattern.matcher(userCode).matches();
    }

    String getQueryCollapseInnerHitsSorts();

        final Set<String> valueSet = new HashSet<>();
        for (final LabelTypePattern pattern : labelTypePatternList) {
            if (pattern.match(path)) {
                valueSet.add(pattern.getValue());
            }
        }
        return valueSet;
    }

    /**
     * Builds a list of label type patterns.
     *
     * @param labelTypeList The list of label types.
     */

    /**
     * Cache for client rules mapping client names to their corresponding URL patterns.
     * This cache improves performance by avoiding repeated parsing of client configuration rules.
     * The key is the rule string, and the value is a pair containing the client name and compiled pattern.
     */
    protected ConcurrentHashMap<String, Pair<String, Pattern>> clientRuleCache = new ConcurrentHashMap<>();

    /**

        System.setProperty("java.version", "11.0.1");

        // Test version patterns with different separators
        String[] args = new String[] { "11:-Dprop=value:with:colons", "8-:-Xbootclasspath/a:/path/to/jar", "malformed11:-invalid", // Should not match pattern
                "11-malformed:-invalid" // Should not match pattern
        };

        String[] result = JvmUtil.filterJvmOptions(args);

└── fess_indices/              # OpenSearch index mappings

src/main/webapp/WEB-INF/view/  # JSP templates
src/test/java/.../it/          # Integration tests (*Tests.java)
```

## Architecture Patterns

### Action (Controller)
- Hierarchy: `TypicalAction` → `FessBaseAction` → `FessAdminAction`/`FessSearchAction`
- `@Execute` marks web endpoints
- `@Resource` for DI

   - 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**

    /** Search/filter parameter for duplicate host configuration ID. */
    public String id;

    /** Search/filter parameter for regular hostname pattern. */
    public String regularName;

    /** Search/filter parameter for duplicate hostname pattern. */
    public String duplicateHostName;

    /** Search/filter parameter for duplicate host sort order. */
    public String sortOrder;

                final Pattern pattern = Pattern.compile(value);
                paramMap.put(URL_EXCLUDE_PATTERN, pattern);
                if (logger.isDebugEnabled()) {
                    logger.debug("Using exclude pattern: {}", pattern);
                }
            }
            if (paramMap.get(URL_EXCLUDE_PATTERN) instanceof final Pattern pattern) {
                if (pattern.matcher(url).matches()) {