* security protections against deserialization attacks. By default, it uses an
 * ObjectInputFilter to restrict which classes can be deserialized.
 * </p>
 * <p>
 * The default filter allows common safe classes like primitives, arrays, String,
 * Number types, collections, and classes in the org.codelibs package. For custom
 * requirements, use the overloaded methods that accept a custom filter.
 * </p>
 *
 * @author higa

        assertEquals(str, result);
    }

    /**
     * Test that default filter allows org.codelibs classes
     *
     * @throws Exception
     */
    public void testFromBinaryToObject_DefaultFilter_AllowsCodelibsClasses() throws Exception {
        // The default filter should allow org.codelibs.* classes
        final TestSerializableClass obj = new TestSerializableClass("test", 456);

        buf.append(cpSeparator);
        // WEB-INF/classes
        buf.append("WEB-INF");
        buf.append(File.separator);
        buf.append("classes");
        // target/classes
        final String userDir = System.getProperty("user.dir");
        final File targetDir = new File(userDir, "target");
        final File targetClassesDir = new File(targetDir, "classes");
        if (targetClassesDir.isDirectory()) {

| Type | Convention | Example |
|------|-----------|---------|
| Classes/Interfaces | PascalCase | `SuggestIndexer`, `ReadingConverter` |
| Methods | camelCase | `createIndexIfNothing()` |
| Constants | UPPER_SNAKE_CASE | `DEFAULT_MAX_READING_NUM` |
| Packages | lowercase | `org.codelibs.fess.suggest` |

### JavaDoc Requirements

All public classes and methods require JavaDoc with `@param`, `@return`, and `@throws` tags.

        buf.append(cpSeparator);
        // WEB-INF/classes
        buf.append("WEB-INF");
        buf.append(File.separator);
        buf.append("classes");
        // target/classes
        final String userDir = System.getProperty("user.dir");
        final File targetDir = new File(userDir, "target");
        final File targetClassesDir = new File(targetDir, "classes");
        if (targetClassesDir.isDirectory()) {

							<paths>
								<path>${project.build.directory}/fess/WEB-INF/classes/fess_config.properties</path>
								<path>${project.build.directory}/fess/WEB-INF/classes/fess_env_crawler.properties</path>
								<path>${project.build.directory}/fess/WEB-INF/classes/fess_env_suggest.properties</path>
								<path>${project.build.directory}/fess/WEB-INF/classes/fess_env_thumbnail.properties</path>

```properties
online.help.supported.langs=ja,sv  # Add your language
```

If you have forum support:
```properties
forum.supported.langs=en,ja,sv  # Add your language
```

### 4. Regenerate Auto-Generated Java Classes

Fess uses DBFlute's LastaFlute FreeGen to automatically generate Java constants from property files.

Run the regeneration command:

```bash
# Option 1: Using Maven from project root
mvn dbflute:freegen

            // SECURITY WARNING: setRegistrationRequired(false) allows deserialization of arbitrary classes
            // which could potentially lead to remote code execution vulnerabilities.
            // This should be replaced with explicit class registration using kryo.register()
            // for all classes that need to be serialized/deserialized.
            kryo.setRegistrationRequired(false);

        buf.append(cpSeparator);
        // WEB-INF/classes
        buf.append("WEB-INF");
        buf.append(File.separator);
        buf.append("classes");
        // target/classes
        final String userDir = System.getProperty("user.dir");
        final File targetDir = new File(userDir, "target");
        final File targetClassesDir = new File(targetDir, "classes");
        if (targetClassesDir.isDirectory()) {

                                && (attributes.get("Fess-WebAppJar") != null || attributes.getValue("Fess-WebAppJar") != null)) {
                            createWebResourceSet(ResourceSetType.CLASSES_JAR, "/WEB-INF/classes", possibleJar.getURL(), "/");
                        }
                    }
                } catch (final Exception e) {
                    logger.log(Level.WARNING, e, () -> {