## Pre-Migration Planning

### 1. Assessment Phase

Before starting migration, assess your current system:

- **Document Count**: Total number of indexed documents
- **Index Size**: Storage requirements for search indices
- **Crawl Sources**: URLs, file shares, databases being indexed
- **Custom Configurations**: URL patterns, security rules, metadata fields
- **Search Features**: Facets, suggestions, security filtering, ranking rules

import org.codelibs.fess.opensearch.config.exentity.DataConfig;
import org.codelibs.fess.util.ComponentUtil;
import org.opensearch.index.query.BoolQueryBuilder;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;

/**
 * Helper class for managing data crawling operations in Fess.
 * This class coordinates the execution of data store crawling processes,

        final String index = fessConfig.getIndexDocumentUpdateIndex();
        return deleteBySessionId(searchEngineClient, index, sessionId);
    }

    /**
     * Deletes all documents associated with the specified session ID from the given index.
     *
     * @param searchEngineClient the search engine client to use for deletion
     * @param index the index name to delete documents from

                    new String[] { "tag1" }, new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.QUERY);
        }
        suggester.indexer().index(items);
        suggester.refresh();
    }

	// checksum which are different on each disks.
	for index := range partsMetadata {
		if partsMetadata[index].IsValid() {
			partsMetadata[index].Size = fi.Size
			partsMetadata[index].ModTime = fi.ModTime
			partsMetadata[index].Metadata = fi.Metadata
			partsMetadata[index].Parts = fi.Parts
			partsMetadata[index].Checksum = fi.Checksum
			partsMetadata[index].Versioned = opts.Versioned || opts.VersionSuspended
		}
	}

		}
	}
	partSkip = offset - skipLength

	// Load index and skip more if feasible.
	if partSkip > 0 && len(oi.Parts) > firstPartIdx && len(oi.Parts[firstPartIdx].Index) > 0 {
		_, isEncrypted := crypto.IsEncrypted(oi.UserDefined)
		if isEncrypted {
			dec, err := decrypt(oi.Parts[firstPartIdx].Index)
			if err == nil {
				// Load Index
				var idx s2.Index
				_, err := idx.Load(s2.RestoreIndexHeaders(dec))

        final String index = "fess_basic_config";
        final ZipEntry entry = new ZipEntry(id + "/fess_basic_config.bulk");
        try {
            zos.putNextEntry(entry);
            SearchEngineUtil.scroll(index, hit -> {
                final String data = "{\"index\":{\"_index\":\"" + index + "\",\"_id\":\"" + StringEscapeUtils.escapeJson(hit.getId())

  }

  @Override
  public @Nullable V get(@Nullable Object key) {
    Map<K, V> delegate = delegateOrNull();
    if (delegate != null) {
      return delegate.get(key);
    }
    int index = indexOf(key);
    if (index == -1) {
      return null;
    }
    accessEntry(index);
    return value(index);
  }

  @CanIgnoreReturnValue

    }

    /**
     * Deletes documents from the specified index based on the given query.
     *
     * @param client the OpenSearch client to use for executing the query and delete operations
     * @param settings the settings for the suggest feature, including timeouts and scroll settings
     * @param index the name of the index from which documents should be deleted

	cases := []string{
		// Key
		"['name']", ".name", `."name"`,

		// Index
		"[2]", "[0]", "[100]",

		// Object wildcard
		".*",

		// array wildcard
		"[*]",
	}
	for i, tc := range cases {
		err := p.ParseString(tc, &j)
		if err != nil {
			t.Fatalf("%d: %v", i, err)
		}
		// repr.Println(j, repr.Indent("  "), repr.OmitEmpty(true))
	}
}

func TestJSONPath(t *testing.T) {