import org.codelibs.fess.dict.DictionaryFile;
import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.optional.OptionalEntity;

/**
 * Character mapping file handler for managing character mapping dictionaries.
 * This class provides functionality to load, parse, and manage character mapping
 * rules that define how input characters should be transformed to output characters
 * during text analysis and search processing.
 *

      "sv_analyzer": {
        "type": "custom",
        "tokenizer": "standard",
        "filter": ["lowercase", "swedish_stop", "swedish_stemmer"]
      }
    }
  }
}
```

### 2. Add Custom Dictionaries (Optional)

Create custom dictionary files in: `${fess.dictionary.path}/[lang]/`

Available dictionary types:
- `stopwords.txt` - Words to exclude from indexing
- `stemmer_override.txt` - Custom stemming rules

			 "cluster.initial_cluster_manager_nodes":"search_engine",
			 "node.roles":"cluster_manager,data,ingest,ml",
			 -->
			 "indices.breaker.total.limit":"100%",
			 "action.auto_create_index":"-*"}
		</property>
		<!-- Dictionaries -->
		<postConstruct name="addConfigFile">
			<arg>"fess"</arg>
			<arg>"mapping.txt"</arg>
		</postConstruct>
		<postConstruct name="addConfigFile">
			<arg>"fess"</arg>
			<arg>"synonym.txt"</arg>

import jakarta.servlet.ServletContext;

/**
 * Utility class for accessing various resource paths and files in the Fess application.
 * This class provides methods to retrieve paths for configuration files, templates, dictionaries,
 * thumbnails, plugins, and other resources required by the Fess search engine.
 * It supports both regular deployment and Docker container environments.
 *
 */
public class ResourceUtil {

Fess uses OpenSearch/Elasticsearch internally, so you can:

1. Export index mappings and settings from source
2. Apply custom analyzers in Fess's `fess_config.properties`
3. Create synonym dictionaries in Fess's dictionary directory

---

### Apache Solr

For migrating from Apache Solr:

#### Document Export and Import

**Step 1: Export from Solr**

```bash