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?
