import org.hibernate.dialect.PostgreSQL81Dialect; //导入依赖的package包/类
@Override
public String toSqlString(Criteria criteria, CriteriaQuery criteriaQuery) {
	final Dialect dialect = criteriaQuery.getFactory().getDialect();
	final String[] columns = criteriaQuery.findColumns( propertyName, criteria );
	if ( columns.length != 1 ) {
		throw new HibernateException( "ilike may only be used with single-column properties" );
	}
	if ( dialect instanceof PostgreSQLDialect || dialect instanceof PostgreSQL81Dialect) {
		return columns[0] + " ilike ?";
	}
	else {
		return dialect.getLowercaseFunction() + '(' + columns[0] + ") like ?";
	}
}
 

import org.hibernate.dialect.PostgreSQL81Dialect; //导入依赖的package包/类
public static EngineDecorator getEngineDecorator(String dialect) throws ClassNotFoundException {
	Class<?> dialectClass = Class.forName(dialect);
	if (MySQLDialect.class.isAssignableFrom(dialectClass)) {
		return new MySQLDecorator();
	} else if (PostgreSQL81Dialect.class.isAssignableFrom(dialectClass)) {
		return new PostgreSQLDecorator();
	} else if (Oracle8iDialect.class.isAssignableFrom(dialectClass)) {
		return new OracleDecorator();
	} else if (SQLServerDialect.class.isAssignableFrom(dialectClass)) {
		return new SQLServerDecorator();
	}
	return new NoOpDecorator();

}
 

import org.hibernate.dialect.PostgreSQL81Dialect; //导入依赖的package包/类
private void addDialects(StrategySelectorImpl strategySelector) {
	addDialect( strategySelector, Cache71Dialect.class );
	addDialect( strategySelector, CUBRIDDialect.class );
	addDialect( strategySelector, DB2Dialect.class );
	addDialect( strategySelector, DB2390Dialect.class );
	addDialect( strategySelector, DB2400Dialect.class );
	addDialect( strategySelector, DerbyTenFiveDialect.class );
	addDialect( strategySelector, DerbyTenSixDialect.class );
	addDialect( strategySelector, DerbyTenSevenDialect.class );
	addDialect( strategySelector, FirebirdDialect.class );
	addDialect( strategySelector, FrontBaseDialect.class );
	addDialect( strategySelector, H2Dialect.class );
	addDialect( strategySelector, HSQLDialect.class );
	addDialect( strategySelector, InformixDialect.class );
	addDialect( strategySelector, IngresDialect.class );
	addDialect( strategySelector, Ingres9Dialect.class );
	addDialect( strategySelector, Ingres10Dialect.class );
	addDialect( strategySelector, InterbaseDialect.class );
	addDialect( strategySelector, JDataStoreDialect.class );
	addDialect( strategySelector, MckoiDialect.class );
	addDialect( strategySelector, MimerSQLDialect.class );
	addDialect( strategySelector, MySQL5Dialect.class );
	addDialect( strategySelector, MySQL5InnoDBDialect.class );
	addDialect( strategySelector, MySQL5Dialect.class );
	addDialect( strategySelector, MySQL5InnoDBDialect.class );
	addDialect( strategySelector, Oracle8iDialect.class );
	addDialect( strategySelector, Oracle9iDialect.class );
	addDialect( strategySelector, Oracle10gDialect.class );
	addDialect( strategySelector, PointbaseDialect.class );
	addDialect( strategySelector, PostgresPlusDialect.class );
	addDialect( strategySelector, PostgreSQL81Dialect.class );
	addDialect( strategySelector, PostgreSQL82Dialect.class );
	addDialect( strategySelector, PostgreSQL9Dialect.class );
	addDialect( strategySelector, ProgressDialect.class );
	addDialect( strategySelector, SAPDBDialect.class );
	addDialect( strategySelector, SQLServerDialect.class );
	addDialect( strategySelector, SQLServer2005Dialect.class );
	addDialect( strategySelector, SQLServer2008Dialect.class );
	addDialect( strategySelector, Sybase11Dialect.class );
	addDialect( strategySelector, SybaseAnywhereDialect.class );
	addDialect( strategySelector, SybaseASE15Dialect.class );
	addDialect( strategySelector, SybaseASE157Dialect.class );
	addDialect( strategySelector, TeradataDialect.class );
	addDialect( strategySelector, TimesTenDialect.class );
}
 

import org.hibernate.dialect.PostgreSQL81Dialect; //导入依赖的package包/类
public boolean isPostgreSql() {
    //Since should handle other Postgres dialects as well, since they derive from PostgreSQL81Dialect
    return getHibernateDialect() instanceof PostgreSQL81Dialect;
}