Remove SqlXmlObjectMappingHandler

This class is only known to be used in spring-data-jdbc-ext project
which was never upgraded to Spring Framework 5.x and is no longer
actively developed.

Closes gh-22402

spring-jdbc/src/main/java/org/springframework/jdbc/support/xml/SqlXmlObjectMappingHandler.java

-/*
- * Copyright 2002-2012 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * 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.springframework.jdbc.support.xml;
-
-import java.sql.ResultSet;
-import java.sql.SQLException;
-
-import org.springframework.lang.Nullable;
-
-/**
- * Abstraction for handling XML object mapping to fields in a database.
- *
- * <p>Provides accessor methods for XML fields unmarshalled to an Object,
- * and acts as factory for {@link SqlXmlValue} instances for marshalling
- * purposes.
- *
- * @author Thomas Risberg
- * @since 2.5.5
- * @see java.sql.ResultSet#getSQLXML
- * @see java.sql.SQLXML
- */
-public interface SqlXmlObjectMappingHandler extends SqlXmlHandler {
-
-	/**
-	 * Retrieve the given column as an object marshalled from the XML data retrieved
-	 * from the given ResultSet.
-	 * <p>Works with an internal Object to XML Mapping implementation.
-	 * @param rs the ResultSet to retrieve the content from
-	 * @param columnName the column name to use
-	 * @return the content as an Object, or {@code null} in case of SQL NULL
-	 * @throws java.sql.SQLException if thrown by JDBC methods
-	 * @see java.sql.ResultSet#getSQLXML
-	 */
-	@Nullable
-	Object getXmlAsObject(ResultSet rs, String columnName) throws SQLException;
-
-	/**
-	 * Retrieve the given column as an object marshalled from the XML data retrieved
-	 * from the given ResultSet.
-	 * <p>Works with an internal Object to XML Mapping implementation.
-	 * @param rs the ResultSet to retrieve the content from
-	 * @param columnIndex the column index to use
-	 * @return the content as an Object, or {@code null} in case of SQL NULL
-	 * @throws java.sql.SQLException if thrown by JDBC methods
-	 * @see java.sql.ResultSet#getSQLXML
-	 */
-	@Nullable
-	Object getXmlAsObject(ResultSet rs, int columnIndex) throws SQLException;
-
-	/**
-	 * Get an instance of an {@code SqlXmlValue} implementation to be used together
-	 * with the database specific implementation of this {@code SqlXmlObjectMappingHandler}.
-	 * @param value the Object to be marshalled to XML
-	 * @return the implementation specific instance
-	 * @see SqlXmlValue
-	 */
-	SqlXmlValue newMarshallingSqlXmlValue(Object value);
-
-}