builder.addEscape(c, "\uFFFD");
      }
    }

    // Build the content escaper first and then add quote escaping for the
    // general escaper.
    builder.addEscape('&', "&");
    builder.addEscape('<', "&lt;");
    builder.addEscape('>', "&gt;");
    XML_CONTENT_ESCAPER = builder.build();
    builder.addEscape('\'', "&apos;");
    builder.addEscape('"', "&quot;");

        }

        // xpath.*
        public static class XPath {
            public static final String DEFAULT_LANG = "default.lang";
            public static final String DEFAULT_CONTENT = "default.content";
            public static final String DEFAULT_DIGEST = "default.digest";
            // xapth.<field>=<value>
        }

        // config.*
        public static class Config {

    @Override
    public RelatedContentDbm asDBMeta() {
        return RelatedContentDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "related_content";
    }

    // ===================================================================================
    //                                                                              Source

    @Override
    public RelatedContentDbm asDBMeta() {
        return RelatedContentDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "related_content";
    }

    @Override
    public boolean hasSpecifiedColumn() {
        return _specification != null;
    }

    @Override
    public ConditionQuery localCQ() {
        return doGetConditionQuery();

        assertFileExistence(dir, filename, true);

        File file = new File(dir, filename);

        String contents = FileUtils.fileRead(file, encoding);

        assertEquals(contentsTest, contents);
    }

    public File createFile(File dir, String filename, String contents, String encoding) throws IOException {
        File file = new File(dir, filename);

        file.getParentFile().mkdirs();

   * attribute values and in most elements' text contents, provided that the HTML
   * document's character encoding can encode any non-ASCII code points in the input (as UTF-8 and
   * other Unicode encodings can).
   *
   * <p><b>Note:</b> This escaper only performs minimal escaping to make content structurally
   * compatible with HTML. Specifically, it does not perform entity replacement (symbolic or

import org.opensearch.core.ParseField;
import org.opensearch.core.common.io.stream.NamedWriteable;
import org.opensearch.core.common.io.stream.StreamOutput;
import org.opensearch.core.xcontent.ObjectParser;
import org.opensearch.core.xcontent.XContentBuilder;
import org.opensearch.core.xcontent.XContentParser;
import org.opensearch.index.query.AbstractQueryBuilder;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryShardContext;

import org.codelibs.fess.es.client.SearchEngineClient;
import org.lastaflute.di.exception.IORuntimeException;
import org.opensearch.core.xcontent.MediaType;
import org.opensearch.core.xcontent.ToXContent;
import org.opensearch.core.xcontent.XContentBuilder;
import org.opensearch.core.xcontent.XContentHelper;
import org.opensearch.search.SearchHit;

public final class SearchEngineUtil {

            return this;
        }

        public XmlWriterRequestBuilder<T> content(T content) {
            this.content = content;
            return this;
        }

        public XmlWriterRequest<T> build() {
            return new DefaultXmlWriterRequest<>(path, outputStream, writer, content);
        }

        private static class DefaultXmlWriterRequest<T> implements XmlWriterRequest<T> {

            if (writer != null) {
                new MavenStaxWriter().write(writer, content);
            } else if (outputStream != null) {
                new MavenStaxWriter().write(outputStream, content);
            } else {
                try (OutputStream os = Files.newOutputStream(path)) {
                    new MavenStaxWriter().write(outputStream, content);
                }
            }
        } catch (Exception e) {