/** The key of the message: Failed to download a synonym file. */
    public static final String ERRORS_failed_to_download_synonym_file = "{errors.failed_to_download_synonym_file}";

    /** The key of the message: Failed to upload a synonym file. */
    public static final String ERRORS_failed_to_upload_synonym_file = "{errors.failed_to_upload_synonym_file}";

import org.apache.lucene.analysis.core.KeywordTokenizer;
import org.apache.lucene.analysis.core.LowerCaseFilter;
import org.apache.lucene.analysis.synonym.SolrSynonymParser;
import org.apache.lucene.analysis.synonym.SynonymMap;
import org.apache.lucene.analysis.synonym.WordnetSynonymParser;
import org.opensearch.common.settings.Settings;
import org.opensearch.common.unit.TimeValue;
import org.opensearch.env.Environment;

#### Index Settings Migration

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

    /**
     * User property for chained LRM: whether to ignore "availability check" in tail or not. Usually you do want
     * to ignore it. This property is mapped onto corresponding Resolver 2.x property, is like a synonym for it.
     * Default value: <code>true</code>.
     *
     * @since 3.9.0

# Online help key for elevate word.
online.help.name.elevateword=elevateword
# Online help key for request header.
online.help.name.reqheader=reqheader
# Online help key for synonym dictionary.
online.help.name.dict.synonym=synonym
# Online help key for dictionary.
online.help.name.dict=dict
# Online help key for Kuromoji dictionary.
online.help.name.dict.kuromoji=kuromoji

	</component>

	<component name="kuromojiDictCreator"
		class="org.codelibs.fess.dict.kuromoji.KuromojiCreator">
	</component>
	<component name="synonymCreator"
		class="org.codelibs.fess.dict.synonym.SynonymCreator">
	</component>
	<component name="stemmerOverrideCreator"
		class="org.codelibs.fess.dict.stemmeroverride.StemmerOverrideCreator">
	</component>
	<component name="protwordsCreator"

        super.setUp(testInfo);
        testDir = File.createTempFile("synonymtest", "_dir");
        testDir.delete();
        testDir.mkdirs();
        file1 = new File(testDir, "synonym.txt");
        FileUtil.writeBytes(file1.getAbsolutePath(), "abc=>123\nxyz,890".getBytes(Constants.UTF_8));
    }

    @Override
    protected void tearDown(TestInfo testInfo) throws Exception {

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.dict.synonym;

import org.codelibs.fess.unit.UnitFessTestCase;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.TestInfo;

public class SynonymCreatorTest extends UnitFessTestCase {

    @Override

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.dict.synonym;

import org.codelibs.fess.unit.UnitFessTestCase;
import org.junit.jupiter.api.Test;

public class SynonymItemTest extends UnitFessTestCase {

    @Test
    public void test_new1() {

          "seed" : 1,
          "bit" : 2,
          "size" : 64
        },
        "synonym_filter" : {
          "type" : "synonym_graph",
          "synonyms_path": "${fess.dictionary.path}synonym.txt"
        }
      },
      "tokenizer": {
        "japanese_tokenizer": {
          "type": "fess_japanese_tokenizer",
          "mode": "normal",