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Here we invoke the coalesce() method without arguments to get back a CriteriaBuilder.Coalesce object that we then use the value() method of to add values to the COALESCE expression. The following example demonstrates this approach: CriteriaQuery<Object> c = cb.createQuery(); Root<Department> dept = c.from(Department.class); c.select(cb.coalesce() .value(dept.get("name")) .value(dept.get("id"))); Convenience versions of the coalesce() method also exist for the case where only two expressions are being compared. CriteriaQuery<Object> c = cb.createQuery(); Root<Department> dept = c.from(Department.class); c.select(cb.coalesce(dept.get("name"), dept.get("id"))); A final note about case expressions is that they are another exception to the rule that the CriteriaBuilder methods are non-mutating. Each when() method causes another conditional expression to be added incrementally to the case expression, and each value() method adds an additional value to the coalesce list.

Not to be confused with the built-in functions of JP QL, function expressions are a feature unique to the criteria API that allows native SQL stored functions to be mixed with other criteria API expressions. They are intended for cases where a limited amount of native SQL is required to satisfy some requirement but you don t want to convert the entire query to SQL. Function expressions are created with the function() method of the CriteriaBuilder interface. It requires as arguments the database function name, the expected return type and a variable list of arguments, if any, that should be passed to the function. The return type is an Expression, so it can be used in many other places within the query. The following example invokes a database function to capitalize the first letter of each word in a department name: CriteriaQuery<String> c = cb.createQuery(String.class); Root<Department> dept = c.from(Department.class); c.select(cb.function("initcap", String.class, dept.get("name"))); As always, developers interested in maximizing the portability of their applications should be careful in using function expressions. Unlike native SQL queries, which are clearly marked, function expressions are a small part of what otherwise looks like a normal portable JPA query that is actually tied to database-specific behavior.

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Thus, with Spring Security, a few lines of configuration are enough to set up your authentication component. Once the user is successfully authenticated, the request is forwarded to the URL specified by the defaultTargetURL, which in this case is /secure/app/ createPolicy.do. Anonymous Processing Filter (ANPF) This is the third filter in the chain. Its sole purpose is to set an anonymous Authentication object in the security context. This will allow you to browse certain URLs that are not

The orderBy() method of the CriteriaQuery interface sets the ordering for a query definition. This method accepts one or more Order objects, which are created by the asc() and desc() methods of the CriteriaBuilder interface, for ascending and descending ordering respectively. The following example demonstrates the orderBy() method: CriteriaQuery<Tuple> c = cb.createQuery(Tuple.class); Root<Employee> emp = c.from(Employee.class);

Automatically flushes before completion. Specifies a class that implements the org.hibernate.transaction. TransactionFactory interface. Specifies a class that implements the org.hibernate.transaction. TransactionManagerLookup interface. The JNDI name for the UserTransaction object. Specifies a class that implements the org.hibernate.cache.CacheProvider interface. Specifies whether or not to use the query cache. Specifies a class that implements the org.hibernate.cache.QueryCacheFactory interface for getting QueryCache objects. Determines whether or not to use the Hibernate second level cache. Configures the cache to favor minimal puts over minimal gets. The prefix to use for the name of the cache. Determines whether statistics are collected. Determines whether Hibernate uses identifier rollback. Instead of using slower standard Java reflection, uses the CGLib code generation library to optimize access to business object properties. Slower at startup if this is enabled, but faster runtime performance. Specifies an HQL query factory class name. Any possible SQL token substitutions Hibernate should use. Automatically creates, updates, or drops database schema on startup and shut down. There are three possible values: create, createdrop, and update. Be careful with create-drop! Specifies which SQLExceptionConverter to use to convert SQLExceptions into JDBCExceptions. Turns on JDBC result set wrapping with column names. Order SQL update statements by each primary key.

Join<Employee,Department> dept = emp.join("dept"); c.multiselect(dept.get("name"), emp.get("name")); c.orderBy(cb.desc(dept.get("name")), cb.asc(emp.get("name"))); Query ordering through the criteria API is still subject to the same constraints as JP QL. The arguments to asc() and desc() must be single-valued expressions, typically formed from the state field of an entity. The order in which the arguments are passed to the orderBy() method determines the generation of SQL. The equivalent JP QL for the query shown in the previous example is as follows: SELECT d.name, e.name FROM Employee e JOIN e.dept d ORDER BY d.name DESC, e.name

secure and can be viewed without verifying user s identity with the application. ANPF can be configured as shown in Listing 6-13.

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