How to detect when an attribute is modified by calling reflection methods

Posted by Oleg Pavliv on Stack Overflow See other posts from Stack Overflow or by Oleg Pavliv
Published on 2010-05-12T11:49:58Z Indexed on 2010/05/12 11:54 UTC
Read the original article Hit count: 228

Filed under:

java

|

reflection

I have the following class

public class MyClass {
   private int myAttr;

   public void setAttr(int a) { 
      myAttr = a; 
      Thread.dumpStack();
   }
}

That way I can detect any attempt to modify myAttr. Well, almost any. It does not work when someone modifies myAttr using Field.set() method. How can I trap Java reflection usage?

© Stack Overflow or respective owner

Related posts about java

Tomcat 6: Access Control Exception?

as seen on Server Fault - Search for 'Server Fault'
I'm trying to setup a tomcat6 server, and I'm trying to match another setup someone else established. However, my deployment (default Ubuntu install) uses a policy.d/ directory structure, and the established server just uses a catalina.policy file. I've tried setting every entry in policy.d to match… >>> More
Problem in creation MDB Queue connection at Jboss StartUp

as seen on Stack Overflow - Search for 'Stack Overflow'
I am not able to create a Queue connection in JBOSS4.2.3GA Version & Java1.5, as I am using MDB as per the below details. I am putting this MDB in a jar file(named utsJar.jar) and copied it in deploy folder of JBOSS, In the test env. this MDB works well but in another env. [ env settings and… >>> More
failing to establish connection between Postgres db and gwt

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am using Postgres and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When I try to connect it gives "ClassNotFoundException". Here is what I get when I try to connect to database: java.lang.ClassNotFoundException: org.postgresql.Driver at java.net… >>> More
failing to establish connection between postgre db and gwt

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, For i am using postgre and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When i try to connect it gives "ClassNotFoundException". Here is what i get when i try to connect to database: java.lang.ClassNotFoundException: org.postgresql.Driver at java.net… >>> More
Migration and deployement problems JBoss 4.2.2.GA to JBoss 6.0.0.M2

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I'm trying to migrate an application running on JBoss 4.2.2.GA to JBoss 6.0.0.M2 I give you some log to explain my problem : boot.log : 2010-03-16 09:59:29,406 ERROR [org.jboss.system.server.profileservice.ProfileServiceBootstrap] (Thread-2) Failed to load profile: Summary of incomplete deployments… >>> More

Related posts about reflection

Reflection: Is using reflection still "bad" or "slow"? What has changed with reflection since 2002?

as seen on Programmers - Search for 'Programmers'
I've noticed when dealing with Expressions or Expression Trees I'm using reflection a lot to set and get values in properties and what have you. It has occurred to me that the use of reflection seems to be getting more and more common. Things like DataAnotations for validation, Attribute heavy ORMs… >>> More
Rails Associations - Callback Sequence/Magic

as seen on Stack Overflow - Search for 'Stack Overflow'
Taking following association declaration as an example: class Post has_many :comments end Just by declaring the has_many :comments, ActiveRecord adds several methods of which I am particularly interested in comments which returns array of comments. I browsed through the code and following seems… >>> More
lambda expression based reflection vs normal reflection

as seen on Stack Overflow - Search for 'Stack Overflow'
What is the difference between normal reflection and the reflection that can be done with lambda expressions such as this (taken form build your own MVVM): public void NotifyOfPropertyChange<TProperty>(Expression<Func<TProperty>> property) { var lambda = (LambdaExpression)property; … >>> More
actionscript3: reflect-class applied on rotationY

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I'm using a class which applies a visual reflection-effect to defined movieclips. I use a reflection-class from here: link to source. It works like a charm except when I apply a rotation to the movieclip. In my case the reflection is still visible but only a part of it. What am I doing wrong?… >>> More
System.Reflection - Global methods aren't available for reflection

as seen on Stack Overflow - Search for 'Stack Overflow'
I have an issue with a semantic gap between the CLR and System.Reflection. System.Reflection does not (AFAIK) support reflecting on global methods in an assembly. At the assembly level, I must start with the root types. My compiler can produce assemblies with global methods, and my standard bootstrap… >>> More