No. The annotation processor (the annotation-based framework you’re using) needs to implement an approach to handling placeholders. As an example, a similar technique is implemented in Spring @Value(“#{systemProperties.dbName}”) Here Spring implements an approach to parsing that particular syntax, which in this case translates to something similar to System.getProperty(“dbName”);
No, that’s not possible. Annotations are stored in the class file as constant values and can’t be computed at runtime. The best you can do is store some kind of “instructions” on how to compute the value. For example you could store a simple expression in some scripting language and execute that when reading the … Read more
If anybody ever wants to prioritize custom handlers over default handlers added by spring, here’s a snippet that does it for me, I do this in a @Configuration file private @Inject RequestMappingHandlerAdapter adapter; @PostConstruct public void prioritizeCustomArgumentMethodHandlers () { List<HandlerMethodArgumentResolver> argumentResolvers = new ArrayList<> (adapter.getArgumentResolvers ()); List<HandlerMethodArgumentResolver> customResolvers = adapter.getCustomArgumentResolvers (); argumentResolvers.removeAll (customResolvers); argumentResolvers.addAll (0, … Read more
Using @MappedSuperclass, you would proceed as follows: @MappedSuperclass public class Transaction … @Entity @Table(name=”tbl_creditcard_approved_txns”) public class DeclinedTransaction extends Transaction … @Entity @Table(name=”tbl_creditcard_declined_txns”) public class ApprovedTransaction extends Transaction … Use @AttributeOverride to override column names between the two types of Transaction objects, if needed. Update: I see that you want to map one @Entity to two … Read more
I’ve written a PDF annotation lib for iOS and found the same against-the-spec Acrobat behavior. As a bit of further info, the Text Markup annotation also contains an Rect entry as well as the QuadPoints entry. The Rect entry is per the spec, [llx, lly, urx, ury]. So in Acrobat generated Text Markup annotations, the … Read more
Another one Architecture, more complez but elegant: YES, You can change the table names using NamingStrategies: public class MyNamingStrategy extends DefaultNamingStrategy { … @Override public String tableName(String tableName) { return tableName+yearSuffixTable; } … } And, when you wanna to use the _year tables, you must to create a session with Hibernate that override rhe table … Read more
This is a known issue and unfortunately not trivial to solve without letting all the navigation take place through the view scoped bean in question. See also JSF-impl issue 1839. This does only not cover cases where the enduser changes the URL in browser address bar or closes the window/tab. Their @PreDestroy will also not … Read more
With reflection you can’t retrieve a local variable. So you can’t retrieve an annotation on a local variable via reflection. I think that this kind of annotation is only used for compiler warnings. You can look http://www.eclipse.org/aspectj/doc/released/adk15notebook/annotations.html Local variable annotations are not retained in class files (or at runtime) regardless of the retention policy set … Read more
What are annotations in general? Annotations can be thought of as meta-data for classes. How does annotations works specifically with Spring framework? Spring uses annotations as an alternative to XML for declarative configuration. Some people don’t like XML. Can annotations be used outside Spring Framework or are they Framework specific? You need the implementation JARs … Read more
This public final static long TESTNG_TEST_TIMEOUT = 300000; is a constant variable, a type of constant expression. This public final static long TESTNG_TEST_TIMEOUT = TimeUnit.MINUTES.toMillis(5); is not. Annotation members expect constant expressions (and a few other things like enums and Class literals).