Refactor DatabaseMetaDataDialectHandlerFactory (#7794)

shardingsphere-infra/shardingsphere-infra-common/src/main/java/org/apache/shardingsphere/infra/metadata/model/physical/jdbc/MetaDataConnectionAdapter.java

@@ -19,7 +19,7 @@ package org.apache.shardingsphere.infra.metadata.model.physical.jdbc;
 
 import lombok.RequiredArgsConstructor;
 import org.apache.shardingsphere.infra.database.type.DatabaseType;
-import org.apache.shardingsphere.infra.metadata.model.physical.jdbc.handler.impl.DatabaseMetaDataDialectHandlerFacade;
+import org.apache.shardingsphere.infra.metadata.model.physical.jdbc.handler.DatabaseMetaDataDialectHandlerFactory;
 
 import java.sql.Array;
 import java.sql.Blob;
@@ -67,7 +67,15 @@ public final class MetaDataConnectionAdapter implements Connection {
     
     @Override
     public String getSchema() {
-        return DatabaseMetaDataDialectHandlerFacade.getSchema(connection, databaseType);
+        return DatabaseMetaDataDialectHandlerFactory.findHandler(databaseType).map(handler -> handler.getSchema(connection)).orElse(getSchema(connection));
+    }
+    
+    private String getSchema(final Connection connection) {
+        try {
+            return connection.getSchema();
+        } catch (final SQLException ex) {
+            return null;
+        }
     }
     
     @Override

shardingsphere-infra/shardingsphere-infra-common/src/main/java/org/apache/shardingsphere/infra/metadata/model/physical/jdbc/handler/impl/DatabaseMetaDataDialectHandlerFacade.java → shardingsphere-infra/shardingsphere-infra-common/src/main/java/org/apache/shardingsphere/infra/metadata/model/physical/jdbc/handler/DatabaseMetaDataDialectHandlerFactory.java

@@ -15,58 +15,35 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.infra.metadata.model.physical.jdbc.handler.impl;
+package org.apache.shardingsphere.infra.metadata.model.physical.jdbc.handler;
 
-import java.sql.Connection;
-import java.sql.SQLException;
-import java.util.Optional;
-import java.util.Properties;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
 import org.apache.shardingsphere.infra.database.type.DatabaseType;
-import org.apache.shardingsphere.infra.metadata.model.physical.jdbc.handler.DatabaseMetaDataDialectHandler;
 import org.apache.shardingsphere.infra.spi.ShardingSphereServiceLoader;
 import org.apache.shardingsphere.infra.spi.exception.ServiceProviderNotFoundException;
 import org.apache.shardingsphere.infra.spi.typed.TypedSPIRegistry;
 
+import java.util.Optional;
+import java.util.Properties;
+
 /**
- * Database meta data dialect handler facade.
+ * Database meta data dialect handler factory.
  */
-public final class DatabaseMetaDataDialectHandlerFacade {
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public final class DatabaseMetaDataDialectHandlerFactory {
     
     static {
         ShardingSphereServiceLoader.register(DatabaseMetaDataDialectHandler.class);
     }
     
     /**
-     * Get schema.
-     *
-     * @param connection connection
-     * @param databaseType database type
-     * @return schema
-     */
-    public static String getSchema(final Connection connection, final DatabaseType databaseType) {
-        return findDatabaseSpecialHandler(databaseType).map(handler -> handler.getSchema(connection)).orElse(getSchema(connection));
-    }
-    
-    private static String getSchema(final Connection connection) {
-        try {
-            return connection.getSchema();
-        } catch (final SQLException ex) {
-            return null;
-        }
-    }
-    
-    /**
-     * Get table name pattern.
-     *
-     * @param tableNamePattern table name pattern
+     * Find database meta data dialect handler.
+     * 
      * @param databaseType database type
-     * @return table name pattern
+     * @return database meta data dialect handler
      */
-    public static String getTableNamePattern(final String tableNamePattern, final DatabaseType databaseType) {
-        return findDatabaseSpecialHandler(databaseType).map(handler -> handler.decorate(tableNamePattern)).orElse(tableNamePattern);
-    }
-    
-    private static Optional<DatabaseMetaDataDialectHandler> findDatabaseSpecialHandler(final DatabaseType databaseType) {
+    public static Optional<DatabaseMetaDataDialectHandler> findHandler(final DatabaseType databaseType) {
         try {
             return Optional.of(TypedSPIRegistry.getRegisteredService(DatabaseMetaDataDialectHandler.class, databaseType.getName(), new Properties()));
         } catch (final ServiceProviderNotFoundException ignored) {

shardingsphere-infra/shardingsphere-infra-common/src/main/java/org/apache/shardingsphere/infra/metadata/model/physical/model/table/PhysicalTableMetaDataLoader.java

@@ -21,7 +21,7 @@ import lombok.AccessLevel;
 import lombok.NoArgsConstructor;
 import org.apache.shardingsphere.infra.database.type.DatabaseType;
 import org.apache.shardingsphere.infra.metadata.model.physical.jdbc.MetaDataConnectionAdapter;
-import org.apache.shardingsphere.infra.metadata.model.physical.jdbc.handler.impl.DatabaseMetaDataDialectHandlerFacade;
+import org.apache.shardingsphere.infra.metadata.model.physical.jdbc.handler.DatabaseMetaDataDialectHandlerFactory;
 import org.apache.shardingsphere.infra.metadata.model.physical.model.column.PhysicalColumnMetaDataLoader;
 import org.apache.shardingsphere.infra.metadata.model.physical.model.index.PhysicalIndexMetaDataLoader;
 
@@ -48,7 +48,7 @@ public final class PhysicalTableMetaDataLoader {
      */
     public static Optional<PhysicalTableMetaData> load(final DataSource dataSource, final String tableNamePattern, final DatabaseType databaseType) throws SQLException {
         try (MetaDataConnectionAdapter connectionAdapter = new MetaDataConnectionAdapter(databaseType, dataSource.getConnection())) {
-            String tableName = DatabaseMetaDataDialectHandlerFacade.getTableNamePattern(tableNamePattern, databaseType);
+            String tableName = DatabaseMetaDataDialectHandlerFactory.findHandler(databaseType).map(handler -> handler.decorate(tableNamePattern)).orElse(tableNamePattern);
             return isTableExist(connectionAdapter, tableName)
                     ? Optional.of(new PhysicalTableMetaData(
                           PhysicalColumnMetaDataLoader.load(connectionAdapter, tableName, databaseType), PhysicalIndexMetaDataLoader.load(connectionAdapter, tableName)))

shardingsphere-infra/shardingsphere-infra-common/src/test/java/org/apache/shardingsphere/infra/metadata/model/physical/jdbc/handler/impl/OracleDatabaseMetaDataDialectFacadeTest.java → shardingsphere-infra/shardingsphere-infra-common/src/test/java/org/apache/shardingsphere/infra/metadata/model/physical/jdbc/handler/DatabaseMetaDataDialectHandlerFactoryTest.java

@@ -15,51 +15,26 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.infra.metadata.model.physical.jdbc.handler.impl;
+package org.apache.shardingsphere.infra.metadata.model.physical.jdbc.handler;
 
-import java.sql.Connection;
-import java.sql.DatabaseMetaData;
-import java.sql.SQLException;
-
-import org.apache.shardingsphere.infra.database.type.DatabaseType;
 import org.apache.shardingsphere.infra.database.type.DatabaseTypes;
-
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.mockito.Mock;
 import org.mockito.junit.MockitoJUnitRunner;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-import static org.mockito.Mockito.when;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 
 @RunWith(MockitoJUnitRunner.class)
-public final class OracleDatabaseMetaDataDialectFacadeTest {
-
-    private static final String USER_NAME = "root";
-
-    private static final String TABLE_NAME_PATTERN = "t_order_0";
-
-    private final DatabaseType oracleDatabaseType = DatabaseTypes.getTrunkDatabaseType("Oracle");
-
-    private final DatabaseType mysqlDatabaseType = DatabaseTypes.getTrunkDatabaseType("MySQL");
-
-    @Mock
-    private Connection connection;
-
-    @Mock
-    private DatabaseMetaData databaseMetaData;
-
+public final class DatabaseMetaDataDialectHandlerFactoryTest {
+    
     @Test
-    public void assertGetSchema() throws SQLException {
-        when(connection.getMetaData()).thenReturn(databaseMetaData);
-        when(databaseMetaData.getUserName()).thenReturn(USER_NAME);
-        assertThat(DatabaseMetaDataDialectHandlerFacade.getSchema(connection, oracleDatabaseType), is(USER_NAME.toUpperCase()));
+    public void assertFindHandlerForOracle() {
+        assertTrue(DatabaseMetaDataDialectHandlerFactory.findHandler(DatabaseTypes.getTrunkDatabaseType("Oracle")).isPresent());
     }
     
     @Test
-    public void assertGetTableNamePattern() {
-        assertThat(DatabaseMetaDataDialectHandlerFacade.getTableNamePattern(TABLE_NAME_PATTERN, oracleDatabaseType), is(TABLE_NAME_PATTERN.toUpperCase()));
-        assertThat(DatabaseMetaDataDialectHandlerFacade.getTableNamePattern(TABLE_NAME_PATTERN, mysqlDatabaseType), is(TABLE_NAME_PATTERN));
+    public void assertFindHandlerMySQL() {
+        assertFalse(DatabaseMetaDataDialectHandlerFactory.findHandler(DatabaseTypes.getTrunkDatabaseType("MySQL")).isPresent());
     }
 }