import org.codelibs.core.lang.StringUtil;

/**
 * Constants class that extends CoreLibConstants and contains application-wide constant values for the Fess search engine.
 * This class provides constants for system configuration, crawling and indexing defaults, user agent strings,
 * status values, field names, date/time formats, authentication types, and various reserved words and patterns.
 *
 * <p>Key constant categories include:</p>
 * <ul>

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.api;

import org.apache.maven.api.annotations.Config;

/**
 * Configuration constants.
 */
public final class Constants {

    /**
     * Maven home.
     *
     * @since 3.0.0
     */
    @Config(readOnly = true, source = Config.Source.SYSTEM_PROPERTIES)

            }
        }

        assertEquals("Should have exactly one serialVersionUID", 1, serialVersionUIDCount);
        assertTrue("Should have many label constants", labelConstantCount > 100);
    }

    /**
     * Test that label constant values match their field names
     */
    @Test
    public void test_labelConstantValueMatchesName() throws Exception {

        assertEquals(logoutHashCode, SsoResponseType.LOGOUT.hashCode());

        // Different enum constants should have different hash codes (usually)
        assertNotSame(metadataHashCode, logoutHashCode);
    }

    @Test
    public void test_compareTo() {
        // Test compareTo method for enum constants
        assertEquals(0, SsoResponseType.METADATA.compareTo(SsoResponseType.METADATA));

    }

    /**
     * Test HTTP status code constants are defined correctly
     */
    @Test
    public void test_httpStatusCodeConstants() {
        // Verify the constants are accessible via reflection or by checking their usage
        // Since the constants are private, we test their values indirectly

        // The constants should match standard HTTP status codes
        // HTTP_STATUS_NOT_FOUND = 404

        assertTrue(true);
    }

    @Test
    public void test_constantsExist() {
        // Verify all expected configuration constants are defined
        SpnegoAuthenticator authenticator = new SpnegoAuthenticator();

        // These constants should be accessible (would fail at compile time if not)
        assertTrue(SpnegoAuthenticator.class.getName().contains("SpnegoAuthenticator"));

   *
   * @param file the file to read from
   * @param charset the charset used to decode the input stream; see {@link StandardCharsets} for
   *     helpful predefined constants
   * @return the buffered reader
   */
  public static BufferedReader newReader(File file, Charset charset) throws FileNotFoundException {
    checkNotNull(file);
    checkNotNull(charset);

mvn license:format      # Add license headers
```

## Directory Structure

```
src/main/java/org/codelibs/fess/
├── FessBoot.java              # Application entry point
├── Constants.java             # Central application constants
├── app/
│   ├── web/                   # Controllers (Actions)
│   │   ├── base/              # Base action classes (FessBaseAction, FessAdminAction)

    @Override
    protected void setUp(TestInfo testInfo) throws Exception {
        super.setUp(testInfo);
        messages = new FessMessages();
    }

    // Test constant fields
    @Test
    public void test_constantFields() {
        // Test error message constants
        assertEquals("{errors.front_header}", FessMessages.ERRORS_front_header);
        assertEquals("{errors.front_footer}", FessMessages.ERRORS_front_footer);

        assertFalse(messages2.isEmpty());
    }

    // ===================================================================================
    //                                                                         Constants
    //                                                                         ==========

    @Test
    public void test_roleConstant() {
        assertEquals("admin-maintenance", AdminMaintenanceAction.ROLE);
    }