HHH-13993 Bootstrap analysis: avoid initializing many Dialect classes

hibernate-core/src/main/java/org/hibernate/boot/registry/selector/internal/DefaultDialectSelector.java

@@ -0,0 +1,281 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.boot.registry.selector.internal;
+
+import java.util.Objects;
+
+import org.hibernate.dialect.CUBRIDDialect;
+import org.hibernate.dialect.Cache71Dialect;
+import org.hibernate.dialect.DB2390Dialect;
+import org.hibernate.dialect.DB2390V8Dialect;
+import org.hibernate.dialect.DB2400Dialect;
+import org.hibernate.dialect.DB2400V7R3Dialect;
+import org.hibernate.dialect.DB2Dialect;
+import org.hibernate.dialect.DerbyTenFiveDialect;
+import org.hibernate.dialect.DerbyTenSevenDialect;
+import org.hibernate.dialect.DerbyTenSixDialect;
+import org.hibernate.dialect.Dialect;
+import org.hibernate.dialect.FirebirdDialect;
+import org.hibernate.dialect.FrontBaseDialect;
+import org.hibernate.dialect.H2Dialect;
+import org.hibernate.dialect.HANAColumnStoreDialect;
+import org.hibernate.dialect.HANARowStoreDialect;
+import org.hibernate.dialect.HSQLDialect;
+import org.hibernate.dialect.InformixDialect;
+import org.hibernate.dialect.Ingres10Dialect;
+import org.hibernate.dialect.Ingres9Dialect;
+import org.hibernate.dialect.IngresDialect;
+import org.hibernate.dialect.InterbaseDialect;
+import org.hibernate.dialect.JDataStoreDialect;
+import org.hibernate.dialect.MckoiDialect;
+import org.hibernate.dialect.MimerSQLDialect;
+import org.hibernate.dialect.MySQL57Dialect;
+import org.hibernate.dialect.MySQL57InnoDBDialect;
+import org.hibernate.dialect.MySQL5Dialect;
+import org.hibernate.dialect.MySQL5InnoDBDialect;
+import org.hibernate.dialect.MySQL8Dialect;
+import org.hibernate.dialect.Oracle10gDialect;
+import org.hibernate.dialect.Oracle8iDialect;
+import org.hibernate.dialect.Oracle9iDialect;
+import org.hibernate.dialect.PointbaseDialect;
+import org.hibernate.dialect.PostgreSQL81Dialect;
+import org.hibernate.dialect.PostgreSQL82Dialect;
+import org.hibernate.dialect.PostgreSQL9Dialect;
+import org.hibernate.dialect.PostgresPlusDialect;
+import org.hibernate.dialect.ProgressDialect;
+import org.hibernate.dialect.SAPDBDialect;
+import org.hibernate.dialect.SQLServer2005Dialect;
+import org.hibernate.dialect.SQLServer2008Dialect;
+import org.hibernate.dialect.SQLServerDialect;
+import org.hibernate.dialect.Sybase11Dialect;
+import org.hibernate.dialect.SybaseASE157Dialect;
+import org.hibernate.dialect.SybaseASE15Dialect;
+import org.hibernate.dialect.SybaseAnywhereDialect;
+import org.hibernate.dialect.TeradataDialect;
+import org.hibernate.dialect.TimesTenDialect;
+
+public class DefaultDialectSelector implements LazyServiceResolver<Dialect> {
+
+	@Override
+	public Class<? extends Dialect> resolve(final String name) {
+		Objects.requireNonNull( name);
+		if ( name.isEmpty() ) {
+			return null;
+		}
+		//Let's organize all string matches in groups by first letter:
+		final char n = name.charAt( 0 );
+		switch ( n ) {
+			case 'C': return caseC( name );
+			case 'D': return caseD( name );
+			case 'F': return caseF( name );
+			case 'H': return caseH( name );
+			case 'I': return caseI( name );
+			case 'J': return caseJ( name );
+			case 'M': return caseM( name );
+			case 'O': return caseO( name );
+			case 'P': return caseP( name );
+			case 'S': return caseS( name );
+			case 'T': return caseT( name );
+		}
+		return null;
+	}
+
+	private static Class<? extends Dialect> caseC(final String name) {
+		if ( name.equals( "Cache71" ) ) {
+			return Cache71Dialect.class;
+		}
+		if ( name.equals( "CUBRID" ) ) {
+			return CUBRIDDialect.class;
+		}
+		return null;
+	}
+
+	private static Class<? extends Dialect> caseD(final String name) {
+		if ( name.equals( "DB2" ) ) {
+			return DB2Dialect.class;
+		}
+		if ( name.equals( "DB2390" ) ) {
+			return DB2390Dialect.class;
+		}
+		if ( name.equals( "DB2390V8" ) ) {
+			return DB2390V8Dialect.class;
+		}
+		if ( name.equals( "DB2400" ) ) {
+			return DB2400Dialect.class;
+		}
+		if ( name.equals( "DB2400V7R3" ) ) {
+			return DB2400V7R3Dialect.class;
+		}
+		if ( name.equals( "DerbyTenFive" ) ) {
+			return DerbyTenFiveDialect.class;
+		}
+		if ( name.equals( "DerbyTenSix" ) ) {
+			return DerbyTenSixDialect.class;
+		}
+		if ( name.equals( "DerbyTenSeven" ) ) {
+			return DerbyTenSevenDialect.class;
+		}
+		return null;
+	}
+
+	private static Class<? extends Dialect> caseF(final String name) {
+		if ( name.equals( "Firebird" ) ) {
+			return FirebirdDialect.class;
+		}
+		if ( name.equals( "FrontBase" ) ) {
+			return FrontBaseDialect.class;
+		}
+		return null;
+	}
+
+	private static Class<? extends Dialect> caseH(final String name) {
+		if ( name.equals( "H2" ) ) {
+			return H2Dialect.class;
+		}
+		if ( name.equals( "HANAColumnStore" ) ) {
+			return HANAColumnStoreDialect.class;
+		}
+		if ( name.equals( "HANARowStore" ) ) {
+			return HANARowStoreDialect.class;
+		}
+		if ( name.equals( "HSQL" ) ) {
+			return HSQLDialect.class;
+		}
+		return null;
+	}
+
+	private static Class<? extends Dialect> caseI(final String name) {
+		if ( name.equals( "Informix" ) ) {
+			return InformixDialect.class;
+		}
+		if ( name.equals( "Ingres" ) ) {
+			return IngresDialect.class;
+		}
+		if ( name.equals( "Ingres9" ) ) {
+			return Ingres9Dialect.class;
+		}
+		if ( name.equals( "Ingres10" ) ) {
+			return Ingres10Dialect.class;
+		}
+		if ( name.equals( "Interbase" ) ) {
+			return InterbaseDialect.class;
+		}
+		return null;
+	}
+
+	private static Class<? extends Dialect> caseJ(final String name) {
+		if ( name.equals( "JDataStore" ) ) {
+			return JDataStoreDialect.class;
+		}
+		return null;
+	}
+
+	private static Class<? extends Dialect> caseM(final String name) {
+		if ( name.equals( "Mckoi" ) ) {
+			return MckoiDialect.class;
+		}
+		if ( name.equals( "MimerSQL" ) ) {
+			return MimerSQLDialect.class;
+		}
+		if ( name.equals( "MySQL5" ) ) {
+			return MySQL5Dialect.class;
+		}
+		if ( name.equals( "MySQL5InnoDB" ) ) {
+			return MySQL5InnoDBDialect.class;
+		}
+		if ( name.equals( "MySQL57InnoDB" ) ) {
+			return MySQL57InnoDBDialect.class;
+		}
+		if ( name.equals( "MySQL57" ) ) {
+			return MySQL57Dialect.class;
+		}
+		if ( name.equals( "MySQL8" ) ) {
+			return MySQL8Dialect.class;
+		}
+		return null;
+	}
+
+	private static Class<? extends Dialect> caseO(final String name) {
+		if ( name.equals( "Oracle8i" ) ) {
+			return Oracle8iDialect.class;
+		}
+		if ( name.equals( "Oracle9i" ) ) {
+			return Oracle9iDialect.class;
+		}
+		if ( name.equals( "Oracle10g" ) ) {
+			return Oracle10gDialect.class;
+		}
+		return null;
+	}
+
+	private static Class<? extends Dialect> caseP(final String name) {
+		if ( name.equals( "Pointbase" ) ) {
+			return PointbaseDialect.class;
+		}
+		if ( name.equals( "PostgresPlus" ) ) {
+			return PostgresPlusDialect.class;
+		}
+		if ( name.equals( "PostgreSQL81" ) ) {
+			return PostgreSQL81Dialect.class;
+		}
+		if ( name.equals( "PostgreSQL82" ) ) {
+			return PostgreSQL82Dialect.class;
+		}
+		if ( name.equals( "PostgreSQL9" ) ) {
+			return PostgreSQL9Dialect.class;
+		}
+		if ( name.equals( "Progress" ) ) {
+			return ProgressDialect.class;
+		}
+		return null;
+	}
+
+	private static Class<? extends Dialect> caseS(final String name) {
+		if ( name.equals( "SAPDB" ) ) {
+			return SAPDBDialect.class;
+		}
+		if ( name.equals( "SQLServer" ) ) {
+			return SQLServerDialect.class;
+		}
+		if ( name.equals( "SQLServer2005" ) ) {
+			return SQLServer2005Dialect.class;
+		}
+		if ( name.equals( "SQLServer2008" ) ) {
+			return SQLServer2008Dialect.class;
+		}
+		if ( name.equals( "Sybase11" ) ) {
+			return Sybase11Dialect.class;
+		}
+		if ( name.equals( "SybaseAnywhere" ) ) {
+			return SybaseAnywhereDialect.class;
+		}
+		if ( name.equals( "Sybase11" ) ) {
+			return Sybase11Dialect.class;
+		}
+		if ( name.equals( "SybaseAnywhere" ) ) {
+			return SybaseAnywhereDialect.class;
+		}
+		if ( name.equals( "SybaseASE15" ) ) {
+			return SybaseASE15Dialect.class;
+		}
+		if ( name.equals( "SybaseASE157" ) ) {
+			return SybaseASE157Dialect.class;
+		}
+		return null;
+	}
+
+	private static Class<? extends Dialect> caseT(final String name) {
+		if ( name.equals( "Teradata" ) ) {
+			return TeradataDialect.class;
+		}
+		if ( name.equals( "TimesTen" ) ) {
+			return TimesTenDialect.class;
+		}
+		return null;
+	}
+
+}

hibernate-core/src/main/java/org/hibernate/boot/registry/selector/internal/LazyServiceResolver.java

@@ -0,0 +1,14 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.boot.registry.selector.internal;
+
+@FunctionalInterface
+public interface LazyServiceResolver<T> {
+
+	Class<? extends T> resolve(String name);
+
+}