Handles all indexing operations, content parsing, and word management (bad words, elevate words).

### SuggestSettings (Configuration)
Location: `src/main/java/org/codelibs/fess/suggest/settings/SuggestSettings.java`

Manages configuration stored in OpenSearch: analyzers, bad words, elevate words, timeouts.

### SuggestItem (Domain Entity)

import jakarta.validation.constraints.Size;

/**
 * Form class for editing elevate word configurations in the admin interface.
 * This form extends CreateForm to include fields necessary for updating existing elevate word entries,
 * including tracking information for optimistic locking and audit trails.
 * Elevate words are used to boost specific documents in search results when certain keywords are matched.
 *
 */

            break;
        default:
            break;
        }
        return OptionalEntity.empty();
    }

    /**
     * Get the protected word item.
     * @param form The create form.
     * @param hook The error hook.
     * @return The protected word item.
     */
    protected OptionalEntity<ProtwordsItem> createProtwordsItem(final CreateForm form, final VaErrorHook hook) {
        try {

import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

import jakarta.validation.constraints.Size;

/**
 * Form class for creating protected words dictionary entries.
 * Protected words are terms that should not be modified or analyzed during
 * text processing, preserving their original form in search indexes.
 *
 */
public class CreateForm {

    /**

    }

    /**
     * Indexes a search word.
     *
     * @param index The index name
     * @param searchWord The search word
     * @param fields The fields
     * @param tags The tags
     * @param roles The roles
     * @param num The number
     * @param langs The languages
     * @param badWords The bad words array
     * @return The SuggestIndexResponse
     */

import org.opensearch.transport.client.Client;

/**
 * Represents a request for popular words. This class extends {@link Request} and is parameterized
 * with {@link PopularWordsResponse}. It allows specifying various criteria for retrieving popular words,
 * such as index, size, tags, roles, fields, languages, and exclusion words.
 *
 * <p>Key functionalities include:</p>
 * <ul>
 *   <li>Setting the target index for the search.</li>

            }
            break;
        default:
            break;
        }
        return OptionalEntity.empty();
    }

    /**
     * Get the bad word.
     * @param form The create form.
     * @return The bad word.
     */
    public static OptionalEntity<BadWord> getBadWord(final CreateForm form) {
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();

     * @param badWords The list of bad words to filter against
     * @return The SuggestIndexResponse
     */
    public SuggestIndexResponse index(final String index, final SuggestItem item, final String[] badWords) {
        return index(index, new SuggestItem[] { item }, badWords);
    }

    /**
     * Indexes multiple suggest items with bad word filtering.
     *
     * @param index The index name

    /**
     * Sets whether to match the first word.
     * @param matchWordFirst True to match the first word, false otherwise.
     * @return This builder instance.
     */
    public SuggestRequestBuilder setMatchWordFirst(final boolean matchWordFirst) {
        request.setMatchWordFirst(matchWordFirst);
        return this;
    }

    /**
     * Sets whether to skip duplicate words.

    /** The CRUD operation mode for form processing */
    @ValidateTypeFailure
    public Integer crudMode;

    /** The input word that should be stemmed differently */
    @Required
    @Size(max = 1000)
    public String input;

    /** The desired stem output for the input word */
    @Required
    @Size(max = 1000)
    public String output;

    /**