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();

        Pattern pattern = Pattern.compile(FS_FILE_RULE_PATTERN);
        assertTrue(pattern.matcher("text/html").matches());
    }

    @Test
    public void test_fsFileRulePattern_lhaTypes() {
        Pattern pattern = Pattern.compile(FS_FILE_RULE_PATTERN);
        assertTrue(pattern.matcher("application/lha").matches());
        assertTrue(pattern.matcher("application/x-lha").matches());

        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

        assertTrue(pattern.match("/test/path"));

        // Should not match excluded path
        assertFalse(pattern.match("/exclude/path"));
    }

    @Test
    public void test_labelTypePattern_match_noPatterns() {
        LabelTypePattern pattern = new LabelTypePattern("test", null, null);

        // Should match everything when no patterns
        assertTrue(pattern.match("/any/path"));

        assertFalse(validator.isValid("* * * *", context));
    }

    // Test common valid cron patterns that are likely to work
    @Test
    public void test_basicValidCronExpressions() {
        final ConstraintValidatorContext context = null;

        // Test basic patterns that should be valid
        String[] potentiallyValidCrons = { "0 0 * * * ?", // Every hour

* Java compilation of Gradle code suffers from small performance penalty (up to 10%).
* Time has to be allocated to clean up existing projects.
* One has to write NullAway-conformant code even when hacking.
* Some patterns used to satisfy NullAway can be slightly more verbose.

    /** Pattern for detecting reserved characters in Lucene range field queries. */
    public static final Pattern LUCENE_RANGE_FIELD_RESERVED_PATTERN = Pattern.compile("([!\\(\\){}\\[\\]\"~\\\\:\\p{Zs}]|(&&)|(\\|\\|))");

    // ============================================================
    // Query and Search Constants