hibernate 配置常量类Environment

Environment 运行环境的意思，hibernate中org.hibernate.cfg.Environment中定义了加载hibernate配置基本参数的常量。

public static final String CONNECTION_PROVIDER="hibernate.connection.provider_class";
	/**
	 * JDBC driver class
	 */
	public static final String DRIVER ="hibernate.connection.driver_class";
	/**
	 * JDBC transaction isolation level
	 */
	public static final String ISOLATION ="hibernate.connection.isolation";
	/**
	 * JDBC URL
	 */
	public static final String URL ="hibernate.connection.url";
	/**
	 * JDBC user
	 */
	public static final String USER ="hibernate.connection.username";
	/**
	 * JDBC password
	 */
	public static final String PASS ="hibernate.connection.password";
	/**
	 * JDBC autocommit mode
	 */
	public static final String AUTOCOMMIT ="hibernate.connection.autocommit";
	/**
	 * Maximum number of inactive connections for Hibernate's connection pool
	 */
	public static final String POOL_SIZE ="hibernate.connection.pool_size";
	/**
	 * <tt>java.sql.Datasource</tt> JNDI name
	 */
	public static final String DATASOURCE ="hibernate.connection.datasource";
	/**
	 * prefix for arbitrary JDBC connection properties
	 */
	public static final String CONNECTION_PREFIX = "hibernate.connection";

	/**
	 * JNDI initial context class, <tt>Context.INITIAL_CONTEXT_FACTORY</tt>
	 */
	public static final String JNDI_CLASS ="hibernate.jndi.class";
	/**
	 * JNDI provider URL, <tt>Context.PROVIDER_URL</tt>
	 */
	public static final String JNDI_URL ="hibernate.jndi.url";
	/**
	 * prefix for arbitrary JNDI <tt>InitialContext</tt> properties
	 */
	public static final String JNDI_PREFIX = "hibernate.jndi";
	/**
	 * JNDI name to bind to <tt>SessionFactory</tt>
	 */
	public static final String SESSION_FACTORY_NAME = "hibernate.session_factory_name";

	/**
	 * Hibernate SQL {@link org.hibernate.dialect.Dialect} class
	 */
	public static final String DIALECT ="hibernate.dialect";

	/**
	 * {@link org.hibernate.dialect.resolver.DialectResolver} classes to register with the
	 * {@link org.hibernate.dialect.resolver.DialectFactory}
	 */
	public static final String DIALECT_RESOLVERS = "hibernate.dialect_resolvers";

	/**
	 * A default database schema (owner) name to use for unqualified tablenames
	 */
	public static final String DEFAULT_SCHEMA = "hibernate.default_schema";
	/**
	 * A default database catalog name to use for unqualified tablenames
	 */
	public static final String DEFAULT_CATALOG = "hibernate.default_catalog";

	/**
	 * Enable logging of generated SQL to the console
	 */
	public static final String SHOW_SQL ="hibernate.show_sql";
	/**
	 * Enable formatting of SQL logged to the console
	 */
	public static final String FORMAT_SQL ="hibernate.format_sql";
	/**
	 * Add comments to the generated SQL
	 */
	public static final String USE_SQL_COMMENTS ="hibernate.use_sql_comments";
	/**
	 * Maximum depth of outer join fetching
	 */
	public static final String MAX_FETCH_DEPTH = "hibernate.max_fetch_depth";
	/**
	 * The default batch size for batch fetching
	 */
	public static final String DEFAULT_BATCH_FETCH_SIZE = "hibernate.default_batch_fetch_size";
	/**
	 * Use <tt>java.io</tt> streams to read / write binary data from / to JDBC
	 */
	public static final String USE_STREAMS_FOR_BINARY = "hibernate.jdbc.use_streams_for_binary";
	/**
	 * Use JDBC scrollable <tt>ResultSet</tt>s. This property is only necessary when there is
	 * no <tt>ConnectionProvider</tt>, ie. the user is supplying JDBC connections.
	 */
	public static final String USE_SCROLLABLE_RESULTSET = "hibernate.jdbc.use_scrollable_resultset";
	/**
	 * Tells the JDBC driver to attempt to retrieve row Id with the JDBC 3.0 PreparedStatement.getGeneratedKeys()
	 * method. In general, performance will be better if this property is set to true and the underlying
	 * JDBC driver supports getGeneratedKeys().
	 */
	public static final String USE_GET_GENERATED_KEYS = "hibernate.jdbc.use_get_generated_keys";
	/**
	 * Gives the JDBC driver a hint as to the number of rows that should be fetched from the database
	 * when more rows are needed. If <tt>0</tt>, JDBC driver default settings will be used.
	 */
	public static final String STATEMENT_FETCH_SIZE = "hibernate.jdbc.fetch_size";
	/**
	 * Maximum JDBC batch size. A nonzero value enables batch updates.
	 */
	public static final String STATEMENT_BATCH_SIZE = "hibernate.jdbc.batch_size";
	/**
	 * Select a custom batcher.
	 */
	public static final String BATCH_STRATEGY = "hibernate.jdbc.factory_class";
	/**
	 * Should versioned data be included in batching?
	 */
	public static final String BATCH_VERSIONED_DATA = "hibernate.jdbc.batch_versioned_data";
	/**
	 * An XSLT resource used to generate "custom" XML
	 */
	public static final String OUTPUT_STYLESHEET ="hibernate.xml.output_stylesheet";

	/**
	 * Maximum size of C3P0 connection pool
	 */
	public static final String C3P0_MAX_SIZE = "hibernate.c3p0.max_size";
	/**
	 * Minimum size of C3P0 connection pool
	 */
	public static final String C3P0_MIN_SIZE = "hibernate.c3p0.min_size";

	/**
	 * Maximum idle time for C3P0 connection pool
	 */
	public static final String C3P0_TIMEOUT = "hibernate.c3p0.timeout";
	/**
	 * Maximum size of C3P0 statement cache
	 */
	public static final String C3P0_MAX_STATEMENTS = "hibernate.c3p0.max_statements";
	/**
	 * Number of connections acquired when pool is exhausted
	 */
	public static final String C3P0_ACQUIRE_INCREMENT = "hibernate.c3p0.acquire_increment";
	/**
	 * Idle time before a C3P0 pooled connection is validated
	 */
	public static final String C3P0_IDLE_TEST_PERIOD = "hibernate.c3p0.idle_test_period";

	/**
	 * Proxool/Hibernate property prefix
	 */
	public static final String PROXOOL_PREFIX = "hibernate.proxool";
	/**
	 * Proxool property to configure the Proxool Provider using an XML (<tt>/path/to/file.xml</tt>)
	 */
	public static final String PROXOOL_XML = "hibernate.proxool.xml";
	/**
	 * Proxool property to configure the Proxool Provider  using a properties file (<tt>/path/to/proxool.properties</tt>)
	 */
	public static final String PROXOOL_PROPERTIES = "hibernate.proxool.properties";
	/**
	 * Proxool property to configure the Proxool Provider from an already existing pool (<tt>true</tt> / <tt>false</tt>)
	 */
	public static final String PROXOOL_EXISTING_POOL = "hibernate.proxool.existing_pool";
	/**
	 * Proxool property with the Proxool pool alias to use
	 * (Required for <tt>PROXOOL_EXISTING_POOL</tt>, <tt>PROXOOL_PROPERTIES</tt>, or
	 * <tt>PROXOOL_XML</tt>)
	 */
	public static final String PROXOOL_POOL_ALIAS = "hibernate.proxool.pool_alias";

	/**
	 * Enable automatic session close at end of transaction
	 */
	public static final String AUTO_CLOSE_SESSION = "hibernate.transaction.auto_close_session";
	/**
	 * Enable automatic flush during the JTA <tt>beforeCompletion()</tt> callback
	 */
	public static final String FLUSH_BEFORE_COMPLETION = "hibernate.transaction.flush_before_completion";
	/**
	 * Specifies how Hibernate should release JDBC connections.
	 */
	public static final String RELEASE_CONNECTIONS = "hibernate.connection.release_mode";
	/**
	 * Context scoping impl for {@link org.hibernate.SessionFactory#getCurrentSession()} processing.
	 */
	public static final String CURRENT_SESSION_CONTEXT_CLASS = "hibernate.current_session_context_class";
	/**
	 * <tt>TransactionFactory</tt> implementor to use for creating <tt>Transaction</tt>s
	 */
	public static final String TRANSACTION_STRATEGY = "hibernate.transaction.factory_class";
	/**
	 * <tt>TransactionManagerLookup</tt> implementor to use for obtaining the <tt>TransactionManager</tt>
	 */
	public static final String TRANSACTION_MANAGER_STRATEGY = "hibernate.transaction.manager_lookup_class";
	/**
	 * JNDI name of JTA <tt>UserTransaction</tt> object
	 */
	public static final String USER_TRANSACTION = "jta.UserTransaction";

	/**
	 * The <tt>CacheProvider</tt> implementation class
	 */
	public static final String CACHE_PROVIDER = "hibernate.cache.provider_class";

	/**
	 * The {@link org.hibernate.cache.RegionFactory} implementation class
	 */
	public static final String CACHE_REGION_FACTORY = "hibernate.cache.region.factory_class";

	/**
	 * The <tt>CacheProvider</tt> implementation class
	 */
	public static final String CACHE_PROVIDER_CONFIG = "hibernate.cache.provider_configuration_file_resource_path";
	/**
	 * The <tt>CacheProvider</tt> JNDI namespace, if pre-bound to JNDI.
	 */
	public static final String CACHE_NAMESPACE = "hibernate.cache.jndi";
	/**
	 * Enable the query cache (disabled by default)
	 */
	public static final String USE_QUERY_CACHE = "hibernate.cache.use_query_cache";
	/**
	 * The <tt>QueryCacheFactory</tt> implementation class.
	 */
	public static final String QUERY_CACHE_FACTORY = "hibernate.cache.query_cache_factory";
	/**
	 * Enable the second-level cache (enabled by default)
	 */
	public static final String USE_SECOND_LEVEL_CACHE = "hibernate.cache.use_second_level_cache";
	/**
	 * Optimize the cache for mimimal puts instead of minimal gets
	 */
	public static final String USE_MINIMAL_PUTS = "hibernate.cache.use_minimal_puts";
	/**
	 * The <tt>CacheProvider</tt> region name prefix
	 */
	public static final String CACHE_REGION_PREFIX = "hibernate.cache.region_prefix";
	/**
	 * Enable use of structured second-level cache entries
	 */
	public static final String USE_STRUCTURED_CACHE = "hibernate.cache.use_structured_entries";

	/**
	 * Enable statistics collection
	 */
	public static final String GENERATE_STATISTICS = "hibernate.generate_statistics";

	public static final String USE_IDENTIFIER_ROLLBACK = "hibernate.use_identifier_rollback";

	/**
	 * Use bytecode libraries optimized property access
	 */
	public static final String USE_REFLECTION_OPTIMIZER = "hibernate.bytecode.use_reflection_optimizer";

	/**
	 * The classname of the HQL query parser factory
	 */
	public static final String QUERY_TRANSLATOR = "hibernate.query.factory_class";

	/**
	 * A comma-seperated list of token substitutions to use when translating a Hibernate
	 * query to SQL
	 */
	public static final String QUERY_SUBSTITUTIONS = "hibernate.query.substitutions";

	/**
	 * Should named queries be checked during startup (the default is enabled).
	 * <p/>
	 * Mainly intended for test environments.
	 */
	public static final String QUERY_STARTUP_CHECKING = "hibernate.query.startup_check";

	/**
	 * Auto export/update schema using hbm2ddl tool. Valid values are <tt>update</tt>,
	 * <tt>create</tt>, <tt>create-drop</tt> and <tt>validate</tt>.
	 */
	public static final String HBM2DDL_AUTO = "hibernate.hbm2ddl.auto";

	/**
	 * The {@link org.hibernate.exception.SQLExceptionConverter} to use for converting SQLExceptions
	 * to Hibernate's JDBCException hierarchy.  The default is to use the configured
	 * {@link org.hibernate.dialect.Dialect}'s preferred SQLExceptionConverter.
	 */
	public static final String SQL_EXCEPTION_CONVERTER = "hibernate.jdbc.sql_exception_converter";

	/**
	 * Enable wrapping of JDBC result sets in order to speed up column name lookups for
	 * broken JDBC drivers
	 */
	public static final String WRAP_RESULT_SETS = "hibernate.jdbc.wrap_result_sets";

	/**
	 * Enable ordering of update statements by primary key value
	 */
	public static final String ORDER_UPDATES = "hibernate.order_updates";

	/**
	 * Enable ordering of insert statements for the purpose of more effecient JDBC batching.
	 */
	public static final String ORDER_INSERTS = "hibernate.order_inserts";

	/**
	 * The EntityMode in which set the Session opened from the SessionFactory.
	 */
    public static final String DEFAULT_ENTITY_MODE = "hibernate.default_entity_mode";

    /**
     * The jacc context id of the deployment
     */
    public static final String JACC_CONTEXTID = "hibernate.jacc_context_id";

	public static final String BYTECODE_PROVIDER = "hibernate.bytecode.provider";

	public static final String JPAQL_STRICT_COMPLIANCE= "hibernate.query.jpaql_strict_compliance";

上面是从源文件copy出来的常量，Environment是final的常量类，不可以被继承。