[jboss-user] [JBoss AOP] - IllegalAccessException using reflection on private field
I have an app that relies heavily on reflection. I want to use AOP with it, but I get an
error when accessing a private variable through java.lang.reflect.Field. It appears that
aspects disables the call to Field.setAccessible(); The following sample code works fine
until I apply aspects.
| // TestObject.java
| package test;
|
| public class TestObject
| {
| @SuppressWarnings("unused")
| private String testField = "Initial Value";
| }
|
| // TestAspect.java
| package test;
|
| import org.jboss.aop.joinpoint.FieldReadInvocation;
| import org.jboss.aop.joinpoint.FieldWriteInvocation;
|
| public class TestAspect
| {
| public Object accessField(FieldReadInvocation invocation) throws Throwable
| {
| return invocation.invokeNext();
| }
|
| public Object accessField(FieldWriteInvocation invocation) throws Throwable
| {
| return invocation.invokeNext();
| }
| }
|
| // Main.java
| package test;
|
| import java.lang.reflect.Field;
|
| public class Main
| {
| public static void main(String[] args)
| {
| TestObject test = new TestObject();
|
| fieldReadTest(test);
| out("");
| fieldWriteTest(test, "Some new value");
| out("");
| fieldReadTest(test);
| }
|
| public static void fieldWriteTest(TestObject test, Object newValue)
| {
| infoOut("Begin Field Write Test");
|
| try
| {
| Field f = TestObject.class.getDeclaredField("testField");
| f.setAccessible(true);
| f.set(test, newValue);
| infoOut("End Field Write Test - Success")
| ; }
| catch(Exception e)
| {
| out(e);
| infoOut("End Field Write Test - FAILED");
| }
| }
|
| public static void fieldReadTest(TestObject test)
| {
| infoOut("Begin Field Read Test");
|
| try
| {
| Field f = TestObject.class.getDeclaredField("testField");
| f.setAccessible(true);
| System.out.println(String.valueOf(f.get(test)));
| infoOut("End Field Read Test - Success")
| ; }
| catch(Exception e)
| {
| out(e);
| infoOut("End Field Read Test - FAILED");
| }
| }
|
| private static void infoOut(String s)
| {
| System.out.println("[" + s + "]");
| }
|
| private static void out(Object o)
| {
| System.out.println(o.toString());
| }
| }
|
jboss-aop.xml
| <?xml version="1.0" encoding="UTF-8"
standalone="yes"?>
| <aop>
| <aspect name="ReflectionAspect"
class="org.jboss.aop.reflection.ReflectionAspect" scope="PER_VM"/>
|
| <bind pointcut="call(* java.lang.reflect.Field->get*(..))">
| <advice name="interceptFieldGet"
aspect="ReflectionAspect"/>
| </bind>
|
| <bind pointcut="call(* java.lang.reflect.Field->set*(..))">
| <advice name="interceptFieldSet"
aspect="ReflectionAspect"/>
| </bind>
|
| <aspect class="test.TestAspect" scope="PER_VM"/>
|
| <bind pointcut="field(* test.TestObject->*)">
| <advice name="accessField" aspect="test.TestAspect"/>
| </bind>
| </aop>
|
Am I doing something wrong, or is this a bug?
View the original post :
http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4047385#...
Reply to the post :
http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...