Remove code that's no longer used

Closes gh-23993

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/orm/jpa/DatabaseLookup.java

@@ -1,87 +0,0 @@
-/*
- * Copyright 2012-2020 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
- *
- *      https://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.boot.autoconfigure.orm.jpa;
-
-import java.sql.DatabaseMetaData;
-import java.util.Collections;
-import java.util.EnumMap;
-import java.util.Map;
-
-import javax.sql.DataSource;
-
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-
-import org.springframework.boot.jdbc.DatabaseDriver;
-import org.springframework.jdbc.support.JdbcUtils;
-import org.springframework.jdbc.support.MetaDataAccessException;
-import org.springframework.orm.jpa.vendor.Database;
-
-/**
- * Utility to lookup well known {@link Database Databases} from a {@link DataSource}.
- *
- * @author Eddú Meléndez
- * @author Phillip Webb
- */
-final class DatabaseLookup {
-
-	private static final Log logger = LogFactory.getLog(DatabaseLookup.class);
-
-	private static final Map<DatabaseDriver, Database> LOOKUP;
-
-	static {
-		Map<DatabaseDriver, Database> map = new EnumMap<>(DatabaseDriver.class);
-		map.put(DatabaseDriver.DERBY, Database.DERBY);
-		map.put(DatabaseDriver.H2, Database.H2);
-		map.put(DatabaseDriver.HSQLDB, Database.HSQL);
-		map.put(DatabaseDriver.MYSQL, Database.MYSQL);
-		map.put(DatabaseDriver.ORACLE, Database.ORACLE);
-		map.put(DatabaseDriver.POSTGRESQL, Database.POSTGRESQL);
-		map.put(DatabaseDriver.SQLSERVER, Database.SQL_SERVER);
-		map.put(DatabaseDriver.DB2, Database.DB2);
-		map.put(DatabaseDriver.INFORMIX, Database.INFORMIX);
-		map.put(DatabaseDriver.HANA, Database.HANA);
-		LOOKUP = Collections.unmodifiableMap(map);
-	}
-
-	private DatabaseLookup() {
-	}
-
-	/**
-	 * Return the most suitable {@link Database} for the given {@link DataSource}.
-	 * @param dataSource the source {@link DataSource}
-	 * @return the most suitable {@link Database}
-	 */
-	static Database getDatabase(DataSource dataSource) {
-		if (dataSource == null) {
-			return Database.DEFAULT;
-		}
-		try {
-			String url = JdbcUtils.extractDatabaseMetaData(dataSource, DatabaseMetaData::getURL);
-			DatabaseDriver driver = DatabaseDriver.fromJdbcUrl(url);
-			Database database = LOOKUP.get(driver);
-			if (database != null) {
-				return database;
-			}
-		}
-		catch (MetaDataAccessException ex) {
-			logger.warn("Unable to determine jdbc url from datasource", ex);
-		}
-		return Database.DEFAULT;
-	}
-
-}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/orm/jpa/DatabaseLookupTests.java

@@ -1,111 +0,0 @@
-/*
- * Copyright 2012-2019 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
- *
- *      https://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.boot.autoconfigure.orm.jpa;
-
-import java.sql.Connection;
-import java.sql.DatabaseMetaData;
-
-import javax.sql.DataSource;
-
-import org.junit.jupiter.api.Test;
-
-import org.springframework.orm.jpa.vendor.Database;
-
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.mockito.BDDMockito.given;
-import static org.mockito.Mockito.mock;
-
-/**
- * Tests for {@link DatabaseLookup}.
- *
- * @author Eddú Meléndez
- * @author Phillip Webb
- */
-class DatabaseLookupTests {
-
-	@Test
-	void getDatabaseWhenDataSourceIsNullShouldReturnDefault() {
-		assertThat(DatabaseLookup.getDatabase(null)).isEqualTo(Database.DEFAULT);
-	}
-
-	@Test
-	void getDatabaseWhenDataSourceIsUnknownShouldReturnDefault() throws Exception {
-		testGetDatabase("jdbc:idontexist:", Database.DEFAULT);
-	}
-
-	@Test
-	void getDatabaseWhenDerbyShouldReturnDerby() throws Exception {
-		testGetDatabase("jdbc:derby:", Database.DERBY);
-	}
-
-	@Test
-	void getDatabaseWhenH2ShouldReturnH2() throws Exception {
-		testGetDatabase("jdbc:h2:", Database.H2);
-	}
-
-	@Test
-	void getDatabaseWhenHsqldbShouldReturnHsqldb() throws Exception {
-		testGetDatabase("jdbc:hsqldb:", Database.HSQL);
-	}
-
-	@Test
-	void getDatabaseWhenMysqlShouldReturnMysql() throws Exception {
-		testGetDatabase("jdbc:mysql:", Database.MYSQL);
-	}
-
-	@Test
-	void getDatabaseWhenOracleShouldReturnOracle() throws Exception {
-		testGetDatabase("jdbc:oracle:", Database.ORACLE);
-	}
-
-	@Test
-	void getDatabaseWhenPostgresShouldReturnPostgres() throws Exception {
-		testGetDatabase("jdbc:postgresql:", Database.POSTGRESQL);
-	}
-
-	@Test
-	void getDatabaseWhenSqlserverShouldReturnSqlserver() throws Exception {
-		testGetDatabase("jdbc:sqlserver:", Database.SQL_SERVER);
-	}
-
-	@Test
-	void getDatabaseWhenDb2ShouldReturnDb2() throws Exception {
-		testGetDatabase("jdbc:db2:", Database.DB2);
-	}
-
-	@Test
-	void getDatabaseWhenInformixShouldReturnInformix() throws Exception {
-		testGetDatabase("jdbc:informix-sqli:", Database.INFORMIX);
-	}
-
-	@Test
-	void getDatabaseWhenSapShouldReturnHana() throws Exception {
-		testGetDatabase("jdbc:sap:", Database.HANA);
-	}
-
-	private void testGetDatabase(String url, Database expected) throws Exception {
-		DataSource dataSource = mock(DataSource.class);
-		Connection connection = mock(Connection.class);
-		DatabaseMetaData metaData = mock(DatabaseMetaData.class);
-		given(dataSource.getConnection()).willReturn(connection);
-		given(connection.getMetaData()).willReturn(metaData);
-		given(metaData.getURL()).willReturn(url);
-		Database database = DatabaseLookup.getDatabase(dataSource);
-		assertThat(database).isEqualTo(expected);
-	}
-
-}