javabeans

find out the differences between two java beans for version tracking

You could use Apache Commons Beanutils. Here’s a simple example: package at.percom.temp.zztests; import java.lang.reflect.InvocationTargetException; import org.apache.commons.beanutils.BeanMap; import org.apache.commons.beanutils.PropertyUtilsBean; import java.util.Arrays; import java.util.HashSet; import java.util.Objects; import java.util.Set; public class Main { public static void main(String[] args) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException { Main main = new Main(); main.start(); } public void start() throws IllegalAccessException, InvocationTargetException, NoSuchMethodException { … Read more

Json Java serialization that works with GWT [closed]

Take a look at GWT’s Overlay Types. I think this is by far the easiest way to work with JSON in GWT. Here’s a modified code example from the linked article: public class Customer extends JavaScriptObject { public final native String getFirstName() /*-{ return this.first_name; }-*/; public final native void setFirstName(String value) /*-{ this.first_name = … Read more

Java Reflection Beans Property API

You question is very unclear, but if I get it: Yes. The java.beans package has the so called Introspector. There you can read the properties of a bean. BeanInfo info = Introspector.getBeanInfo(Bean.class); PropertyDescriptor[] pds = info.getPropertyDescriptors(); You can find the desired PropertyDescriptor by its name and you can call getReadMethod().invoke(..)

Programmatically configure LogBack appender

Here a simple example that works for me (note that I use the FileAppender in this example) import org.slf4j.LoggerFactory; import ch.qos.logback.classic.Level; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.LoggerContext; import ch.qos.logback.classic.encoder.PatternLayoutEncoder; import ch.qos.logback.classic.spi.ILoggingEvent; import ch.qos.logback.core.FileAppender; public class Loggerutils { public static void main(String[] args) { Logger foo = createLoggerFor(“foo”, “foo.log”); Logger bar = createLoggerFor(“bar”, “bar.log”); foo.info(“test”); bar.info(“bar”); } private … Read more

Retrieving servlet context, session and request in a POJO outside container

Only and only if your POJO is running in the same thread as the HttpServletRequest is running in, then you’ll be able to achieve this with help of ThreadLocal<T>. Create the following class: public final class YourContext implements AutoCloseable { private static ThreadLocal<YourContext> instance = new ThreadLocal<>(); private HttpServletRequest request; private HttpServletResponse response; private YourContext(HttpServletRequest … Read more

JPA 2.0 : Exception to use javax.validation.* package in JPA 2.0

As @Korgen mentioned in comments hibernate-validator-5.x.x isn’t compatible with validation-api-1.0.x. This is because of moving to new specification JSR-303 -> JSR-349. There are two ways to solve this issue: 1. Downgrade hibernate validator version (which is implements JSR-303): <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>4.3.1.Final</version> </dependency> 2. If you don’t want to move back from hibernate validator 5 … Read more

Spring cannot find bean xml configuration file when it does exist

Thanks, but that was not the solution. I found it out why it wasn’t working for me. Since I’d done a declaration: ApplicationContext context = new ClassPathXmlApplicationContext(“beans.xml”); I thought I would refer to root directory of the project when beans.xml file was there. Then I put the configuration file to src/main/resources and changed initialization to: … Read more