org.hibernate.engine.jdbc.env.spi.IdentifierHelperBuilder#from ( )源码实例Demo

/**
 * Constructor form used when the JDBC {@link java.sql.DatabaseMetaData} is not available.
 *
 * @param serviceRegistry The service registry
 * @param dialect The resolved dialect.
 */
public JdbcEnvironmentImpl(ServiceRegistryImplementor serviceRegistry, Dialect dialect) {
	this.dialect = dialect;

	final ConfigurationService cfgService = serviceRegistry.getService( ConfigurationService.class );

	NameQualifierSupport nameQualifierSupport = dialect.getNameQualifierSupport();
	if ( nameQualifierSupport == null ) {
		// assume both catalogs and schemas are supported
		nameQualifierSupport = NameQualifierSupport.BOTH;
	}
	this.nameQualifierSupport = nameQualifierSupport;

	this.sqlExceptionHelper = buildSqlExceptionHelper( dialect, logWarnings( cfgService, dialect ) );

	final IdentifierHelperBuilder identifierHelperBuilder = IdentifierHelperBuilder.from( this );
	identifierHelperBuilder.setGloballyQuoteIdentifiers( globalQuoting( cfgService ) );
	identifierHelperBuilder.setSkipGlobalQuotingForColumnDefinitions( globalQuotingSkippedForColumnDefinitions( cfgService ) );
	identifierHelperBuilder.setAutoQuoteKeywords( autoKeywordQuoting( cfgService ) );
	identifierHelperBuilder.setNameQualifierSupport( nameQualifierSupport );

	IdentifierHelper identifierHelper = null;
	ExtractedDatabaseMetaDataImpl.Builder dbMetaDataBuilder = new ExtractedDatabaseMetaDataImpl.Builder( this );
	try {
		identifierHelper = dialect.buildIdentifierHelper( identifierHelperBuilder, null );
		dbMetaDataBuilder.setSupportsNamedParameters( dialect.supportsNamedParameters( null ) );
	}
	catch (SQLException sqle) {
		// should never ever happen
		log.debug( "There was a problem accessing DatabaseMetaData in building the JdbcEnvironment", sqle );
	}
	if ( identifierHelper == null ) {
		identifierHelper = identifierHelperBuilder.build();
	}
	this.identifierHelper = identifierHelper;

	this.extractedMetaDataSupport = dbMetaDataBuilder.build();

	this.currentCatalog = identifierHelper.toIdentifier(
			cfgService.getSetting( AvailableSettings.DEFAULT_CATALOG, StandardConverters.STRING )
	);
	this.currentSchema = Identifier.toIdentifier(
			cfgService.getSetting( AvailableSettings.DEFAULT_SCHEMA, StandardConverters.STRING )
	);

	this.qualifiedObjectNameFormatter = new QualifiedObjectNameFormatterStandardImpl( nameQualifierSupport );

	this.lobCreatorBuilder = LobCreatorBuilderImpl.makeLobCreatorBuilder();
}
 

/**
 * Constructor form used from testing
 *
 * @param dialect The dialect
 */
public JdbcEnvironmentImpl(DatabaseMetaData databaseMetaData, Dialect dialect) throws SQLException {
	this.dialect = dialect;

	this.sqlExceptionHelper = buildSqlExceptionHelper( dialect, false );

	this.extractedMetaDataSupport = new ExtractedDatabaseMetaDataImpl.Builder( this )
			.apply( databaseMetaData )
			.setSupportsNamedParameters( databaseMetaData.supportsNamedParameters() )
			.build();

	NameQualifierSupport nameQualifierSupport = dialect.getNameQualifierSupport();
	if ( nameQualifierSupport == null ) {
		nameQualifierSupport = determineNameQualifierSupport( databaseMetaData );
	}
	this.nameQualifierSupport = nameQualifierSupport;

	final IdentifierHelperBuilder identifierHelperBuilder = IdentifierHelperBuilder.from( this );
	identifierHelperBuilder.setNameQualifierSupport( nameQualifierSupport );
	IdentifierHelper identifierHelper = null;
	try {
		identifierHelper = dialect.buildIdentifierHelper( identifierHelperBuilder, databaseMetaData );
	}
	catch (SQLException sqle) {
		// should never ever happen
		log.debug( "There was a problem accessing DatabaseMetaData in building the JdbcEnvironment", sqle );
	}
	if ( identifierHelper == null ) {
		identifierHelper = identifierHelperBuilder.build();
	}
	this.identifierHelper = identifierHelper;

	this.currentCatalog = null;
	this.currentSchema = null;

	this.qualifiedObjectNameFormatter = new QualifiedObjectNameFormatterStandardImpl(
			nameQualifierSupport,
			databaseMetaData
	);

	this.lobCreatorBuilder = LobCreatorBuilderImpl.makeLobCreatorBuilder();
}
 

/**
 * The main constructor form.  Builds a JdbcEnvironment using the available DatabaseMetaData
 *
 * @param serviceRegistry The service registry
 * @param dialect The resolved dialect
 * @param databaseMetaData The available DatabaseMetaData
 *
 * @throws SQLException
 */
public JdbcEnvironmentImpl(
		ServiceRegistryImplementor serviceRegistry,
		Dialect dialect,
		DatabaseMetaData databaseMetaData) throws SQLException {
	this.dialect = dialect;

	final ConfigurationService cfgService = serviceRegistry.getService( ConfigurationService.class );

	this.sqlExceptionHelper = buildSqlExceptionHelper( dialect, logWarnings( cfgService, dialect ) );

	this.extractedMetaDataSupport = new ExtractedDatabaseMetaDataImpl.Builder( this )
			.apply( databaseMetaData )
			.setConnectionSchemaName( determineCurrentSchemaName( databaseMetaData, serviceRegistry, dialect ) )
			.setSupportsNamedParameters(dialect.supportsNamedParameters(databaseMetaData))
			.build();

	NameQualifierSupport nameQualifierSupport = dialect.getNameQualifierSupport();
	if ( nameQualifierSupport == null ) {
		nameQualifierSupport = determineNameQualifierSupport( databaseMetaData );
	}
	this.nameQualifierSupport = nameQualifierSupport;

	final IdentifierHelperBuilder identifierHelperBuilder = IdentifierHelperBuilder.from( this );
	identifierHelperBuilder.setGloballyQuoteIdentifiers( globalQuoting( cfgService ) );
	identifierHelperBuilder.setSkipGlobalQuotingForColumnDefinitions( globalQuotingSkippedForColumnDefinitions( cfgService ) );
	identifierHelperBuilder.setAutoQuoteKeywords( autoKeywordQuoting( cfgService ) );
	identifierHelperBuilder.setNameQualifierSupport( nameQualifierSupport );
	IdentifierHelper identifierHelper = null;
	try {
		identifierHelper = dialect.buildIdentifierHelper( identifierHelperBuilder, databaseMetaData );
	}
	catch (SQLException sqle) {
		// should never ever happen
		log.debug( "There was a problem accessing DatabaseMetaData in building the JdbcEnvironment", sqle );
	}
	if ( identifierHelper == null ) {
		identifierHelper = identifierHelperBuilder.build();
	}
	this.identifierHelper = identifierHelper;

	// and that current-catalog and current-schema happen after it
	this.currentCatalog = identifierHelper.toIdentifier( extractedMetaDataSupport.getConnectionCatalogName() );
	this.currentSchema = identifierHelper.toIdentifier( extractedMetaDataSupport.getConnectionSchemaName() );

	this.qualifiedObjectNameFormatter = new QualifiedObjectNameFormatterStandardImpl(
			nameQualifierSupport,
			databaseMetaData
	);

	this.typeInfoSet.addAll( TypeInfo.extractTypeInfo( databaseMetaData ) );

	this.lobCreatorBuilder = LobCreatorBuilderImpl.makeLobCreatorBuilder(
			cfgService.getSettings(),
			databaseMetaData.getConnection()
	);
}