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();

1. Always run `mvn test` after changes
2. Run `mvn formatter:format` before committing
3. Add license headers to new files with `mvn license:format`
4. Maintain backwards compatibility - deprecate before removing

        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

└── 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

    /** 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

```
fess-crawler-parent/
├── fess-crawler/              # Core framework
├── fess-crawler-lasta/        # LastaFlute DI integration
└── fess-crawler-opensearch/   # OpenSearch backend
```

### Key Design Patterns

- **Factory**: `CrawlerClientFactory`, `ExtractorFactory` - protocol/format-specific component selection
- **Strategy**: `CrawlerClient`, `Extractor`, `Transformer` - pluggable implementations

crawler.document.html.default.lang=
# Patterns to include for HTML index processing.
crawler.document.html.default.include.index.patterns=
# Patterns to exclude for HTML index processing.
crawler.document.html.default.exclude.index.patterns=(?i).*(css|js|jpeg|jpg|gif|png|bmp|wmv|xml|ico|exe)
# Patterns to include for HTML search processing.
crawler.document.html.default.include.search.patterns=
# Patterns to exclude for HTML search processing.

* 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.

    <url-pattern>/*</url-pattern>
    <dispatcher>REQUEST</dispatcher>
  </filter-mapping>

  <filter-mapping>
    <filter-name>webApiFilter</filter-name>
    <url-pattern>/*</url-pattern>
    <dispatcher>REQUEST</dispatcher>
  </filter-mapping>

  <filter-mapping>
    <filter-name>lastaShowbaseFilter</filter-name>
    <url-pattern>/*</url-pattern>
    <dispatcher>REQUEST</dispatcher>

        le: float | None = None,
        min_length: int | None = None,
        max_length: int | None = None,
        pattern: str | None = None,
        regex: Annotated[
            str | None,
            deprecated(
                "Deprecated in FastAPI 0.100.0 and Pydantic v2, use `pattern` instead."
            ),
        ] = None,
        discriminator: str | None = None,
        strict: bool | None = _Unset,